KR101948535B1 - A drier for canister of spent nuclear fuel have function sensing about gas circulating line, detecting about gas leak section and automatic forming bypass gas circulating line and control method thereof - Google Patents

Abstract

The present invention relates to an apparatus for drying an internal space of a canister loaded with spent nuclear fuel, which includes: a canister having an interior space having a gas inlet and a gas outlet; a gas cooling device for cooling the non-reactive gas discharged from the inner space of the canister; a non-reactive gas source for storing a non-reactive gas supplied to the inner space of the canister; a first gas circulation pump for pumping non-reactive gases carried along the first and second gas circulation lines; a first heater for heating the non-reactive gas supplied to the canister; first valve means for opening and closing the second gas circulation line; second dew-point temperature measuring means for repeatedly measuring the dew-point temperature of the non-reactive gas passing through the canister and transmitting the measurement signal; and a controller.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a canister drying apparatus having a function of automatically detecting a gas leak in a gas circulation line, detecting a gas leak occurrence section, and forming a bypass circulation line, gas circulating line, detecting gas leak section and automatic forming bypass gas circulating line and control method thereof}

The present invention relates to a canister drying apparatus having a function of detecting a gas leakage to a gas circulation line, detecting a gas leak occurrence period, and automatically forming a bypass circulation line, and a control method of the drying apparatus. More particularly, During the drying process of the fuel transporting and storage canister, gas leaks to the gas circulation line through which the non-reactive gas circulates are detected, the gas leakage period is detected, and the detected gas leakage period is provided At the same time, the gas leakage section is closed and the bypass circulation flow path is ensured so that the drying process for the canister is continued, and the non-reactive gas in the gas circulation line and the canister is recovered, if necessary, As well as when the drying of the canister is complete, Gas leak detection on a gas circulation line which can detect the gas inlet and exhaust of the canister, suspend operation of the gas circulation pump, inform the operator of the completion of the drying process and improve the productivity of the drying process, A canister drying device having a function of automatically detecting a leak occurrence section and a bypass circulation line, and a control method of the drying device.

In general, the storage, treatment and transport of spent fuel requires special care and procedural safeguards. In operation of the reactor, a zircaloy tube of concentrated uranium, known as a fuel assembly, is burnt inside the core of the reactor. It is customary to remove this fuel assembly from the furnace after its energy has dropped to a predetermined level. At the time of energy degradation and subsequent removal, this spent nuclear fuel (SNF) is still highly radioactive and generates considerable heat, requiring great care in subsequent packaging, transport and storage. do. Specifically, spent fuel releases extremely dangerous neutrons and gamma photons. After removal from the core, these neutrons and gamma photons must be sealed at all times.

When withdrawing fuel from the reactor, it is widely known to remove the spent fuel from the reactor and dispose of the spent fuel in water, that is, in a generally known fuel pool or storage tank. The water in the pool promotes the cooling of the spent fuel and provides adequate radioactivity shielding. The spent fuel is stored in the pool for a sufficiently long period of time such that the thermal degradation and the collapse of the radioactivity are at a sufficiently low level, thereby enabling the spent fuel to be safely transported. However, due to safety, spatial and economic concerns, use of the pool alone is not sufficient when spent fuel is required to be stored for a considerable period of time. Therefore, when long term storage of spent fuel is required, the standard method in the nuclear industry is to store the spent fuel in a dry state after a short storage period in the spent fuel pool, And to store the spent nuclear fuel in a dry inert gas atmosphere inside the structure that provides adequate radiation shielding. One typical structure used to store spent fuel in a long-term dry state is a storage cask.

As a result of the need for spent fuel for removal of spent fuel from spent fuel pool and for transport of additional storage cask, open fuel canisters are typically used before the spent fuel is removed from the reactor core It is submerged in the spent fuel pool. The spent fuel is then placed directly into the opening canister while submerged in water. However, after the seal, the canister alone can not provide adequate containment of the radioactivity of the SNF. The loaded canister can not be removed or transported from the spent fuel pool without additional radiation shielding. Therefore, devices and methods have been developed to provide additional radioactive shielding during transport of spent fuel. Additional radiation shielding is typically accomplished by placing the canister in a large, cylindrical container called a transfer cask while being submerged in a pool. Like the storage cask, the transfer cask is designed to shield the environment from radiation emitted by internal spent fuel, with a cavity sized to accept canisters of spent fuel inside.

In a facility using a transfer cask for transporting a loaded canister, first an empty canister is placed into the cavity of the open transfer cask. And the canister and transfer cask are submerged in the spent fuel pool. Prior to that, the spent fuel removed from the reactor and disposed in the humidified storage device is moved to a submerged canister (in the transfer cask and full of water). The loaded canister is then installed with a cover, which encloses the spent fuel and water from the pool in the canister. Then, the loaded canister and the transfer cask are landed in the gathering area, in order to prepare the SNF-loaded canister for storage or transportation in the dry state, with the cage being removed from the grass by the crane. For the purpose of properly preparing SNF-loaded canisters for dry storage or transport, the United States Nuclear Regulatory Commission (NRC) has the responsibility to ensure that the spent fuel and canister interior Is required to be properly dried. Specifically, the NRC requirement requires a vapor pressure (VP) equal to or less than 3 Torr (1 Torr = 1 mmHg) in the canister before an inert gas is filled and sealed in the canister have. The vapor pressure is the pressure of the vapor against the liquid in equilibrium, where the equilibrium state is defined as the number of molecules that change from a liquid state to a gaseous state and the number of molecules that change from a gaseous state to a liquid state. A vP requirement of 3 Torr or less ensures a suitable drying space inside the canister, which is desirable for storage or transport of long-term SNFs.

At present, the nuclear facility satisfies the NRC's 3Torr or lower-pressure vP requirement by implementing a vacuum drying process. When performing this process, the bulk water (bulk water) inside the canister is first drained from the canister. Once the bulk of the liquid is drained, the vacuum system is connected to the canister and operated to produce a pressure lower than the atmospheric pressure in the canister. A sub-atmospheric condition within the canister promotes the evaporation of the residual liquid water while the vacuum assists in removing water vapor. The vP inside the canister is experimentally confirmed through a vacuum-and-hold procedure. If necessary, this vacuum / holding procedure is repeated until the pressure for a predetermined test time (30 minutes) reaches 3 Torr. Once the vacuum drying passes the permissive test, the canister is filled with inert gas and the canister is sealed. The transfer cask (with the canister therein) is then transported to the upper position of the storage cask so that the SNF loaded canister is transported to the storage device for long term storage.

Current methods of meeting the vP requirement of 3 Torr or lower of the NRC are time consuming, manual and intensive, and tend to result in erroneous line and gas leakage of the valve. At any time when physically accessing the canister for vacuum monitoring and drying tests, there is a risk that the worker will be exposed to high radioactivity. Further, the generation of pressure lower than the atmospheric pressure in the canister requires an expensive vacuum device and may cause problems on a complicated device.

As a patent developed to solve these conventional problems, Holtec International filed a patent application with the Korean Intellectual Property Office on June 6, 2006 and issued a patent registration dated December 7, 2010 "Drying the high level waste based on dew point temperature measurement (Hereinafter referred to as " prior invention ").

A method of drying a cavity filled with a high-level waste (HLW), comprising the steps of: (a) flowing a non-reactive gas through the cavity; (b) Reactive gas from the cavity; (c) continuously measuring the dew point temperature of the non-reactive gas coming from the cavity for a predetermined period of time, equal to or less than a predetermined dew point temperature Stopping the flow of non-reactive gases and sealing the cavity, "and" a system for drying a cavity in which a high level waste (HLW) is loaded, wherein the inlet and outlet A canister constituting the cavity, a non-reactive gas source, and a flow unit for flowing a non-reactive gas from the non-reactive gas source through the cavity And a controller operatively connected to the dew point temperature measuring means, the dew point temperature measuring means repeatedly measuring the dew point temperature of the non-reactive gas coming from the cavity, Wherein the controller is adapted to analyze the signal and to determine whether the measured dew point temperature of the non-reactive gas is greater than a predetermined value (I) stopping the flow of the non-reactive gas through the cavity, and (ii) if the cavity is dry, it is determined that the dew point temperature is less than or equal to the predetermined dew point temperature, Lt; RTI ID = 0.0 > and / or < "It is.

However, this prior art is configured to dry the internal space of the canister in which the spent nuclear fuel is loaded. However, since gas leakage can not be detected in the gas circulation line in which the non-reactive gas circulates during the drying process of the canister, The drying efficiency for the canister may be significantly lowered due to the leakage of the reactive gas, and it may take a long time to detect the gas leakage section even if the operator senses the gas leakage, The operation of the drying apparatus is stopped for maintenance of the apparatus, resulting in a significant reduction in work productivity. Further, since the non-reactive gas is recharged in the entire gas circulation line after completion of the repair, additional gas charging costs are incurred.

Korean Patent No. 10-1000883 (December 07, 2010)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method and apparatus for detecting a gas leak to a gas circulation line through which a non-reactive gas circulates during a spent fuel transportation and drying process of a storage canister, The gas leakage period is detected, the detected gas leakage period is informed so that a rapid repair work can be performed, the gas leakage period is closed, the bypass circulation flow path is secured, and the drying process for the canister can be continuously performed without interruption Reactive gas in the gas circulation line and the canister can be recovered and reused when necessary so that unnecessary non-reactive gas is not wasted, as well as being immediately sensed when the drying of the canister is completed, The exhaust port is closed, the operation of the gas circulation pump is temporarily stopped, It is possible to immediately perform the drying process for other canisters by notifying the completion of the drying process, thereby minimizing the waste of non-reactive gas due to the gas leakage, improving work productivity for the drying process for the canister, It is possible to prevent the deterioration of the drying efficiency and to minimize the loss of expensive non-reactive gas, thereby reducing the maintenance cost. Gas leakage detection for the gas circulation line, detection of the gas leakage occurrence area and automatic formation of the bypass circulation line And a canister drying apparatus having a function of operating the canister.

It is another object of the present invention to provide a method and apparatus for detecting a gas leak in a gas circulation line while a spent fuel transport and storage canister drying apparatus according to the present invention is operated and detecting a gas leakage period of the gas circulation line, The operator can be informed that repair work can be performed promptly for the relevant section and the drying process for the canister can be carried out without interruption even while the maintenance work is in progress and the gas circulation line and the non- Gas leak detection for a gas circulation line that can efficiently control the operation of the spent nuclear fuel transportation and storage canister drying apparatus, such as rapid recovery of the non-reactive gas, A canister drying apparatus having a function of automatically forming a canister Will.

The above object of the present invention is achieved by an apparatus for drying an internal space of a canister loaded with spent nuclear fuel, the apparatus comprising: a canister having an internal space having a gas inlet and a gas outlet; A gas cooling device for cooling the non-reactive gas discharged from the inner space of the canister, a gas cooling device connected to the canister and the gas cooling device by a second gas circulation line, A non-reactive gas source for storing a reactive gas, and a non-reactive gas source, which is mounted on a second gas circulation line between the gas cooling device and the non-reactive gas source and which pumps the non-reactive gas transferred along the first and second gas circulation lines 1 gas circulation pump and a second gas circulation line between the non-reactive gas source and the canister, First valve means mounted on a second gas circulation line between the first heater and the non-reactive gas source for opening and closing the second gas circulation line, and a second valve means for opening and closing the second gas circulation line, Second dew-point temperature measuring means mounted on the first gas circulation line between the first gas circulation line and the second gas circulation line for repeatedly measuring the dew-point temperature of the non-reactive gas passing through the canister and transmitting the measurement signal; And a controller electrically connected to the heater and the second dew-point temperature measuring means, respectively, for controlling the operating states of the first gas circulating pump and the first heater in accordance with signals received from the second dew-point temperature measuring means; 1. A spent fuel conveying and storage canister drying apparatus for circulating a non-reactive gas along first and second gas circulation lines connected to a canister via a canister, a gas cooling apparatus, and a non-reactive gas source to dry an inner space of a canister A first quick connector positioned on a first gas circulation line communicably connecting the canister and the gas cooling device to branch the first gas circulation line and to quickly connect another line; A second quick connector located on a first gas circulation line between the first quick connector and the canister to branch off the first gas circulation line and to quickly connect another line; A third quick connector positioned on a second gas circulation line between the gas cooling device and the gas circulation pump to branch off the second gas circulation line and to quickly connect another line; A fourth quick connector positioned on a second gas circulation line between the gas circulation pump and the heater to branch off the second gas circulation line and to quickly connect another line; A fifth quick connector positioned on the first gas circulation line between the first and second quick connectors to branch the first gas circulation line and to quickly connect another line; A sixth quick connector positioned on a second gas circulation line between the seventh valve means and the first gas circulation pump to branch the second gas circulation line and to quickly connect another line; A seventh quick connector positioned on the first gas circulation line between the first and fifth quick connectors to branch the first gas circulation line and to quickly connect another line; An eighth quick connector positioned on a second gas circulation line between the third quick connector and the second pressure measurement means to branch the second gas circulation line and to quickly connect another line; A first bypass line communicably connecting the fifth and sixth quick connectors; A second bypass line communicably connecting the seventh and eighth quick connectors; Seventeenth and eighteenth valve means respectively mounted on both ends of the first bypass line and electrically connected to the controller to control the first bypass line under the control of the controller; 20th and 21st valve means respectively mounted on both ends of the second bypass line and electrically connected to the controller to control the second bypass line under the control of the controller; And the second quick connector is electrically connected to the first gas circulation line between the first quick connector and the fifth quick connector and is electrically connected to the controller, A nineteenth valve means for interrupting the valve; Second valve means mounted on a second gas circulation line between the canister and the heater and electrically connected to the controller to open and close the gas flow path between the canister and the heater under the control of the controller; And a second temperature measuring unit that is electrically connected to the first gas circulation line between the canister and the second temperature measuring unit and is electrically connected to the controller to open and close the non-reactive gas flow path between the canister and the second temperature measuring unit under the control of the controller Third valve means; A second quick connector and a second temperature measuring means, the second quick connector being mounted on a first gas circulation line and being electrically connected to the controller to measure the pressure in the first gas circulation line and to transmit the measurement signal to the controller 1 pressure measuring means; The second quick connector being electrically connected to the first gas circulation line between the second quick connector and the first pressure measuring means and being electrically connected to the controller so that the ratio between the second quick connector and the first pressure measuring means Fourth valve means for opening the reactive gas flow path; The first quick connector is electrically connected to the first gas circulation line between the first quick connector and the gas cooling device, and is electrically connected to the controller to open / close the non-reactive gas flow path between the first quick connector and the gas cooling device under the control of the controller. Fifth valve means; And a third quick connector connected between the gas cooling device and the third quick connector, the second quick connector being electrically connected to the controller, A sixth valve means for opening and closing the first valve means; A temperature sensor for detecting the temperature of the non-reactive gas which is mounted on a second gas circulation line between the gas cooling device and the sixth valve means and which is electrically connected to the controller to pass through the gas cooling device and circulate along the second gas circulation line And for transmitting the measurement signal to the controller; A second pressure sensor mounted on a second gas circulation line between the third quick connector and the first gas circulation pump and electrically connected to the controller to measure the pressure in the second gas line and to transmit a measurement signal to the controller, Measuring means; And a second gas circulation pump connected to the first gas circulation pump and being electrically connected to the controller, wherein the ratio between the fourth quick connector and the first gas circulation pump Seventh valve means for opening and closing the reactive gas passage; The fourth quick connector is branched from the second gas circulation line so that the canister and the fourth quick connector are separately connected to the second gas circulation line and the second gas circulation line section between the fourth quick connector and the canister, And a first bypass line for bypassing the non-reactive gas passing through the corresponding section; The second quick connector is branched from the first gas circulation line so as to connect the canister and the second quick connector separately from the first gas circulation line and is connected to the first gas circulation line between the second quick connector and the canister, A second bypass line for closing the section and transferring the non-reactive gas to pass through the section; And the second and fourth quick connectors are connected to each other so as to communicate with each other, and when necessary, the gas transfer section between the first quick connector, the gas cooling device, the third quick connector, the first gas circulation pump and the fourth quick connector And an emergency cooling line for bypassing the non-reactive gas to pass through the corresponding section; A gas recovery line for connecting the first and third quick connectors in a communicative manner and closing the gas transfer section between the gas cooling device and the third quick connector when necessary and for recovering non- and; A display electrically connected to the controller and outputting a status signal received from the controller upon completion of drying, gas leakage, or component failure; Wherein the non-reactive gas source is connected to the first gas circulation line between the second quick connector and the fourth valve means by a gas supply line, A twelfth valve means mounted on the gas supply line and electrically connected to the controller to open and close the gas supply line under the control of the controller, and a second valve means mounted on the gas supply line between the non- And a regulator for maintaining the discharge pressure of the non-reactive gas discharged from the non-reactive gas source at a predetermined pressure. The gas leakage detection, gas leakage occurrence period detection, and bypass circulation line for the gas circulation line are automatically And a canister drying apparatus having a function of forming a canister.

Another object of the present invention is to provide an apparatus for drying an internal space of a canister loaded with spent nuclear fuel, comprising: a canister having an internal space provided with a gas inlet and a gas outlet; A gas cooling device connected to the first gas circulation line and cooling the non-reactive gas discharged from the inner space of the canister, and a second gas circulation line connected to the first gas circulation line between the second quick connector and the fourth valve means, A twelfth valve means mounted on a third gas purifying line between the non-reactive gas source and the first gas purifying line for opening and closing the third gas circulating line, And a regulator mounted on the third gas circulation line for maintaining the discharge pressure of the non-reactive gas discharged from the non-reactive gas source at a set pressure, A non-reactive gas source for storing a non-reactive gas supplied to the inner space of the nyster; and a second gas circulating line installed on the second gas circulating line between the gas cooling device and the non- A first heater for heating a non-reactive gas supplied to the canister, the first heater being mounted on a second gas circulation line between the non-reactive gas source and the canister, A first valve means mounted on a second gas circulation line between the first heater and the non-reactive gas source to open and close the second gas circulation line, and a second valve means disposed on the second gas circulation line between the gas cooling device and the non- A first dew-point temperature measuring means for repeatedly measuring the dew-point temperature of the installed non-reactive gas and transmitting the measurement signal, and a second dew-point temperature measuring means for measuring the dew- A controller for controlling an operation state of the gas circulation pump and the heater in accordance with a signal received from the dew-point temperature measuring means, and a controller for controlling the operation of the gas circulation pump and the heater on the first gas circulation line communicably connecting the canister and the gas cooling apparatus A first quick connector for branching the first gas circulation line and for connecting the other line quickly; and a second quick connector for branching the first gas circulation line located on the first gas circulation line between the first quick connector and the canister, A second quick connector for quickly connecting the other line, and a third quick connector for branching the second gas circulation line located on the second gas circulation line between the gas cooling device and the gas circulation pump, A fourth quick connector positioned on the second gas circulation line between the gas circulation pump and the heater to branch off the second gas circulation line and to quickly connect the other gas line, A fifth quick connector positioned on the first gas circulation line between the first and second quick connectors to branch the first gas circulation line and to quickly connect the other line, A sixth quick connector positioned on the second gas circulation line between the circulation pumps to branch off the second gas circulation line and to quickly connect the other line, and a second gas circulation line on the first gas circulation line between the first and fifth quick connectors A seventh quick connector for branching the first gas circulation line and for quickly connecting the other gas line and a second gas circulation line located on the second gas circulation line between the third quick connector and the second pressure measurement means, An eighth quick connector for branching the circulation line and rapidly connecting the other line, a first bypass line for connecting the fifth and sixth quick connectors in a communicating manner, and a second bypass line for connecting the seventh and eighth quick connectors A second bypass line for connecting the first bypass line and the second bypass line, Seventeenth and eighteenth valve means respectively mounted on both ends of the first bypass line for interrupting the first bypass line, and second and seventh valve means respectively mounted on both ends of the second bypass line, Seventeenth and eighteenth valve means respectively mounted on both ends of the bypass line for interrupting the bypass line, and a seventh and eighteenth valve means interposed between the first quick connector and the fifth quick connector, And a second quick connector mounted on the second gas line between the canister and the heater for interrupting the gas flow path between the first quick connector and the second quick connector, A second valve means for opening and closing the gas passage; and a second valve means mounted on the first gas line between the canister and the second quick connector for measuring the temperature of the non-reactive gas discharged from the canister along the first gas circulation line, A second dew point temperature measuring means for measuring a temperature of the non-reactive gas flowing between the canister and the first dew point temperature measuring means, And a second dew point temperature measuring means for measuring a pressure in the first gas line mounted on a first gas circulation line between the second quick connector and the second dew point temperature measuring means and transmitting the measurement signal to the controller A first pressure measuring means for measuring a pressure of the non-reactive gas flowing between the first quick connector and the first pressure measuring means, And a fifth valve unit mounted on the first gas circulation line between the first quick connector and the gas cooling unit to open and close the non-reactive gas flow path between the first quick connector and the gas cooling unit, A sixth valve means mounted on a second gas circulation line between the gas cooling device and the third quick connector for opening and closing the non-reactive gas flow path between the gas cooling device and the third quick connector, Second pressure measurement means mounted on a second gas circulation line between the connector and the first gas circulation pump to measure the pressure in the second gas circulation line and transmit the measurement signal to the controller, A seventh valve means mounted on a second gas circulation line between the first gas circulation pump and the fourth gas circulation pump for opening and closing the non-reactive gas flow path between the fourth quick connector and the first gas circulation pump, 2 gas circulation line so that the canister and the fourth quick connector are separately connected to the second gas circulation line, and when necessary, the second gas circulation line section between the fourth quick connector and the canister is closed, Pass through A first bypass line for bypassing the non-reactive gas; and a second bypass line branched from the first gas circulation line through the second quick connector to connect the canister and the second quick connector separately from the first gas circulation line, A second bypass line for closing a first gas circulation line section between the second quick connector and the canister and bypassing the non-reactive gas to pass through the section, and a second bypass line for connecting the second and fourth quick connectors The gas transfer section corresponding to the first quick connector, the gas cooler, the third quick connector, the first gas circulation pump, and the fourth quick connector is closed, and the non-reactive gas passing through the corresponding section is bypassed And the first and third quick connectors are connected to each other so as to communicate with each other, and when necessary, the gas transfer section between the gas cooling device and the third quick connector is closed, and the non-reactive A gas return line electrically connected to the controller and configured to output a status signal received from the controller upon completion of drying, gas leakage, or component failure; Gas leak detection for a gas circulation line that circulates a non-reactive gas along a first and a second gas circulation line connected to a canister via a canister, a gas cooling device, and a non-reactive gas source to dry the inner space of the canister, A method for controlling the operation of a canister drying apparatus having a function of automatically detecting a generation interval and a bypass circulation line, the control method comprising: a canister drying step of performing a drying process on spent fuel transportation and storage containers Wow; A measurement signal reception confirmation step of confirming whether a measurement temperature has been received from the temperature measurement means or the pressure measurement means during the canister drying step; A signal type checking step of checking whether the received measurement signal is a temperature signal if it is confirmed that the measurement signal is received in the measurement signal reception confirmation step; Comparing the measured temperature value with a predetermined reference temperature value and checking whether the measured temperature value is less than or equal to the reference temperature value if the received signal is a temperature signal, ; In the step of checking the first measured temperature value, a holding time counting step of counting 30 minutes when the measured temperature value is lower than the reference temperature value; A measuring temperature signal receiving step of receiving a measuring temperature signal from the temperature measuring means when the holding time counting step is completed; Comparing the measured temperature value received through the measuring temperature signal receiving step with a reference temperature value and checking whether the measured temperature value is less than or equal to the reference temperature value; Stopping the canister drying step of closing the valve means and stopping the canister drying step when the measured temperature value is lower than the reference temperature value in the secondary measured temperature value checking step; A drying completion notification step of outputting a drying completion signal indicating completion of drying of the canister through a display when the canister drying stop step is completed; Comparing the measured pressure value with a preset reference pressure value and confirming whether the measured pressure value is less than or equal to a reference pressure value when the received measurement signal is a pressure signal; A gas leakage line detecting step of detecting a gas leakage position with respect to the gas circulation line, if the measured pressure value is equal to or less than the reference pressure value; And a non-reactive gas recovery step of recovering non-reactive gas in the gas circulation line if the detected gas leakage line is detected as a gas circulation line after the gas leakage line detection step is completed. A gas leakage detection section, a gas leak detection section, and a control method of a canister drying apparatus having a function of automatically forming a bypass circulation line.

A canister drying apparatus having a function of automatically detecting a gas leakage, detecting a gas leakage occurrence period, and a bypass circulation line for a gas circulation line according to the present invention and a control method of the drying apparatus are provided in a gas circulation line Reactive gas source is connected to the first gas circulation line between the second quick connector and the fourth valve means by the gas supply line, and the first to eighth quick connectors, the first and second bypass And a plurality of valve means for interrupting the line, the first and second bypass lines, the emergency cooling line, the gas recovery line, the display, and the respective gas circulation lines. When the drying process for the canister is completed, After the gas inlet and exhaust lines are closed, the completion of the drying process is notified, and when gas leakage occurs on the gas circulation line, the gas leakage is immediately detected and the gas leakage interval is detected It is possible to carry out the drying process for the canister uninterruptedly while performing the maintenance work for the relevant section at a high speed while ensuring the bypass gas circulation path at the same time as closing the perimeter section and securing the bypass gas circulation path, By recovering the filled non-reactive gas, it is possible to prevent the loss of expensive non-reactive gas, thereby improving the drying efficiency and drying productivity of the canister and minimizing the loss of expensive non-reactive gas, .

FIG. 1 is a view showing a configuration of a canister drying apparatus having a gas circulation line according to the present invention, a gas leak detecting section for detecting a gas leak occurrence section, and a function for automatically forming a bypass circulation line, Fig.
FIG. 2 is a diagram showing the structure of an emergency cooling line in a canister drying apparatus having a gas circulation line according to the present invention, a gas leak detection period detection function, and a function of automatically forming a bypass circulation line, , ≪ / RTI > and < RTI ID =
FIG. 3 is a schematic view showing the structure of a gas recovery line and the structure of each organic component of a canister dryer having a function of automatically detecting a gas leak, detecting a gas leak occurrence section, and forming a bypass circulation line for the gas circulation line according to the present invention , ≪ / RTI > and < RTI ID =
FIG. 4 is a flowchart illustrating a method of controlling a canister drying apparatus having a function of automatically detecting a gas leakage, detecting a gas leakage occurrence period, and a bypass circulation line for the gas circulation line according to the present invention,
5 is a block diagram illustrating a configuration of a canister drying step in a method of controlling a canister drying apparatus having a function of automatically detecting a gas leakage, detecting a gas leakage occurrence period, and automatically forming a bypass circulation line for the gas circulation line according to the present invention Also,
FIG. 6 is a diagram illustrating a configuration of a gas leak line detection step in the method of controlling a canister dryer having a function of automatically detecting a gas leak, detecting a gas leak occurrence section, and forming a bypass circulation line for the gas circulation line according to the present invention, A flow chart illustrating mutual organic correlations between components,
FIG. 7 is a diagram illustrating a configuration of a non-reactive gas recovery step and a control method of a canister drying apparatus according to the present invention, including a gas leak detection, a gas leak detection period detection, and a control method of a canister drying apparatus having a function of automatically forming a bypass circulation line Figure 5 is a flow chart illustrating interrelated organic correlations between components.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. However, it is to be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It is intended that the disclosure of the invention and its features be included only with reference to the appended claims and their equivalents.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the embodiments of the present invention, which may vary depending on the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. A preferred embodiment of the present invention will be described in detail.

Referring to FIG. 1, a canister drying apparatus 10 having a function of automatically detecting a gas leakage, detecting a gas leakage occurrence period, and a bypass circulation line for a gas circulation line according to the present invention, An apparatus for drying an internal space of a canister, the apparatus comprising: a canister (20) having an internal space having a gas inlet and a gas outlet; a first gas circulation line (P1) communicably connected to the canister A gas cooling device 30 for cooling the non-reactive gas discharged from the inner space of the canister 20 and a second gas circulation line P2 for communicating between the canister 20 and the gas cooling device 30 A non-reactive gas source 40 connected to the gas cooler 30 and storing a non-reactive gas supplied to the inner space of the canister 20, and a second gas circulation path 40 between the gas cooler 30 and the non- Mounted on the line P2, A first gas circulation pump 50 for pumping the non-reactive gas conveyed along the first gas circulation line P1 and the second gas circulation line P1, A first heater 60 mounted on the circulation line P2 for heating a nonreactive gas supplied to the canister 20 and a second heater 60 disposed between the first heater 60 and the non- A first valve means V1 mounted on the circulation line P2 for opening and closing the second gas circulation line P2 and a second gas circulation line P2 between the canister 20 and the gas cooling device 30 A second dew-point temperature measuring means (TS2) mounted on the canister (20) for repeatedly measuring the dew-point temperature of the non-reactive gas passing through the canister (20) The first dew point temperature measuring means TS2 is electrically connected to the first heater 60 and the second dew point temperature measuring means TS2, Depending includes a first gas circulation pump 50, and operation controller 70 that controls the state of the first heater 60; The non-reactive gas is circulated along the first and second gas circulation lines P1 and P2 which are connected to the canister 20 via the canister 20, the gas cooling device 30 and the non-reactive gas source 40 The first to eighth quick connectors QC1 to QC8 and the first and second bypass lines P3 and P4 are connected to the conventional spent nuclear fuel transportation and storage canister drying apparatus for drying the internal space of the canister 20, The first and second bypass lines P7 and P8 and the second to seventh valve means V2 to V7 and the seventeenth valve means V2 to V7, To 21st valve means V17 to V21 and first and second pressure measuring means PS1 and PS2 and first and third temperature measuring means TS1 and TS3, And the nonreactive gas source 40 is connected to the second quick connector QC2 and the fourth valve means VSP by a gas supply line GSP having a twelfth valve means V12 and a regulator RT. (P1) between the first gas circulation line (P1) and the second gas circulation line (V4).

The first to eighth quick connectors (QC1 to QC8) are conventional pipe branching mechanisms that are constructed so that the gas circulation line can be branched so that other lines can be quickly connected and removed.

The first quick connector QC1 is located on the first gas circulation line P1 that communicably connects the canister 20 and the gas cooling device 30 and branches the first gas circulation line P1 , Connect the other line quickly.

The second quick connector QC2 is located on the first gas circulation line P1 between the first quick connector QC1 and the canister 20 to branch the first gas circulation line P1, Lt; / RTI >

The third quick connector QC3 is located on the second gas circulation line P2 between the gas cooling device 30 and the gas circulation pump 50 to branch the second gas circulation line P2, Connect lines quickly.

The fourth quick connector QC4 is located on the second gas circulation line P2 between the gas circulation pump 50 and the heater 60 to branch the second gas circulation line P2 and to supply the other line Connect quickly.

The fifth quick connector QC5 is located on the first gas circulation line P1 between the first and second quick connectors QC1 and QC2 to branch the first gas circulation line P1, Connect lines quickly.

The sixth quick connector QC6 is located on the second gas circulation line P2 between the seventh valve means V7 and the first gas circulation pump 50 to branch the second gas circulation line P2 And connect the other line quickly.

The seventh quick connector QC7 is located on the first gas circulation line P1 between the first and fifth quick connectors QC1 and QC5 to branch the first gas circulation line P1, Connect lines quickly.

The eighth quick connector (QC8) is located on the second gas circulation line (P2) between the third quick connector (QC3) and the second pressure measurement means (PS2) and branches the second gas circulation line And connect the other line quickly.

The first and second bypass lines P7 and P8 are connected to two points on the first and second gas circulation lines P1 and P2 in a communicative manner so as to circulate the non- The first bypass line P7 is connected to the fifth and sixth quick connectors QC5 and QC6 so as to communicate with each other and is connected to the valve means V17 and V18 mounted on both ends, And the second bypass line P8 is communicably connected between the seventh and eighth quick connectors QC7 and QC8 and connected to the twentieth and twenty first valve means V20 (V21). ≪ / RTI >

The seventeenth and eighteenth valve means V17 and V18 are mounted on both ends of the first bypass line P7 as an electromagnetic valve and electrically connected to the controller 70 to control the controller 70 The first bypass line P7 is interrupted.

The twentieth and twenty first valve means V20 and V21 are mounted on both ends of the second bypass line P8 and are electrically connected to the controller 70 to be controlled by the controller 70. [ The second bypass line P8 is interrupted.

The nineteenth valve means V19 is mounted on the first gas circulation line P1 between the second quick connector QC2 and the fifth quick connector QC5 as an electromagnetic valve and electrically connected to the controller 70 And controls the gas flow path between the second quick connector (QC2) and the fifth quick connector (QC5) under the control of the controller (70).

The second valve means V2 is mounted on the second gas circulation line P2 between the canister 20 and the heater 60 as an electromagnetic valve and electrically connected to the controller 70, And opens and closes the gas flow path between the canister 20 and the heater 60 under the control of the controller 60. [

The third valve means V3 is mounted on the first gas circulation line P1 between the canister 20 and the second temperature measuring means TS2 as an electronic valve and is electrically connected to the controller 70 Reactive gas flow path between the canister (20) and the second temperature measuring means (TS2) under the control of the controller (70).

The first pressure measuring means PS1 is mounted on the first gas circulation line P1 between the second quick connector QC2 and the second temperature measuring means TS2 and is electrically connected to the controller 70 And measures the pressure in the first gas circulation line P1 and transmits the measurement signal to the controller 70. [

The fourth valve means V4 is mounted on the first gas circulation line P1 between the second quick connector QC2 and the first pressure measuring means PS1 as an electromagnetic valve, Reactive gas passage between the second quick connector (QC2) and the first pressure measuring means (PS1) under the control of the controller (70).

The fifth valve means V5 is mounted on the first gas circulation line P1 between the first quick connector QC1 and the gas cooling device 30 as an electromagnetic valve and is electrically connected to the controller 70 Reactive gas flow path between the first quick connector (QC1) and the gas cooling device (30) under the control of the controller (70).

The sixth valve means V6 is mounted on the second gas circulation line P2 between the gas cooling device and the third quick connector QC3 as an electronic valve and is electrically connected to the controller 70 Reactive gas flow path between the gas cooling device 30 and the third quick connector (QC3) under the control of the controller (70).

The first temperature measuring means TS1 is a thermometer for measuring the temperature of the non-reactive gas passing through the gas cooling device 30, and the second temperature measuring means TS1 is a thermometer for measuring the temperature of the non-reactive gas passing through the gas cooling device 30, The temperature of the non-reactive gas, which is mounted on the gas circulation line P2 and is electrically connected to the controller 70, passes through the gas cooling device 30 and is circulated along the second gas circulation line P2 is measured , And transmits the measurement signal to the controller (70).

The second pressure measuring means PS2 is a pressure gauge for measuring the pressure in the second gas circulation line P2 that connects the gas cooling device 30 and the canister 20 to the third quick connector QC3, Is mounted on the second gas circulation line (P2) between the first gas circulation pump (50) and is electrically connected to the controller (70) to measure the pressure in the second gas circulation line (P2) To the controller (70).

The seventh valve means V7 is mounted on the second gas circulation line P2 between the fourth quick connector QC4 and the first gas circulation pump 50 as an electronic valve and electrically connected to the controller 70 Reactive gas flow path between the fourth quick connector (QC4) and the first gas circulation pump (50) under the control of the controller (70).

The first bypass line P3 is branched from the second gas circulation line P2 through the fourth quick connector QC4 to connect the canister 20 and the fourth quick connector QC4 to the second gas circulation line P2), and when necessary, the second gas circulation line (P2) section between the fourth quick connector (QC4) and the canister (20) is closed and the non-reactive gas passing through the second section 8th and 9th valve means V8, V9, and a second heater 60a.

The eighth and ninth valve means V8 and V9 are provided at both ends of the valve and are electrically connected to the controller 70 to control the first bypass line P3 in accordance with the control of the controller 70 Open and close.

The second heater 60a is mounted on the first bypass line P3 between the eighth and ninth valve means V8 and V9 and is electrically connected to the controller 70 so that the controller 70 And heats the non-reactive gas transported along the first bypass line P3 in accordance with the control.

The second bypass line P4 is branched from the first gas circulation line P1 through the second quick connector QC2 to connect the canister 20 and the second quick connector QC2 to the first gas circulation line P1), and when necessary, the first gas circulation line P1 interval between the second quick connector QC2 and the canister 20 is closed, and the non-reactive gas passing through the interval is transferred Tenth and eleventh valve means V10, V11, and a third pressure measuring means PS3.

The tenth and eleventh valve means V10 and V11 are respectively mounted on both ends of the valve means V11 and are electrically connected to the controller 70 and controlled by the controller 70 to control the second bypass line P4, Respectively.

The third temperature measuring means TS3 is a dew-point thermometer for measuring the dew-point temperature of the non-reactive gas passing through the canister 20 and circulating along the second bypass line P4, Reactive gas which is mounted on the second bypass line P4 between the first bypass line V10 and the second bypass line P11 and is discharged from the canister 20 via the second bypass line P4, (70).

The third pressure measuring means PS3 is mounted on the second bypass line P4 between the tenth and eleventh valve means V10 and V11 to measure the pressure in the second bypass line P4, And transmits the measurement signal to the controller (70).

The display 80 is electrically connected to the controller 70 and outputs a status signal received from the controller 70 upon completion of drying, gas leakage, or component failure.

Referring to FIGS. 1 and 2, the emergency cooling line P5 connects the second and fourth quick connectors QC2 and QC4 to each other. If necessary, the first quick connector QC1, The gas transfer section between the cooling device 30, the third quick connector QC3, the first gas circulation pump 50 and the fourth quick connector QC4 is closed and the non-reactive gas passing through the corresponding section Detour; Thirteenth and fourteenth valve means V13 and V14, an auxiliary gas cooling device 90, a second gas circulation pump 50a and a fourth temperature measuring means TS4.

The thirteenth and fourteenth valve means V13 and V14 are respectively mounted on both ends of the valve means V14 and electrically connected to the controller 70 to control the emergency cooling line P5 under the control of the controller 70 Open and close.

The auxiliary gas cooling apparatus 90 is connected to the emergency cooling line P5 between the thirteenth and fourteenth valve means V113 and V14 and is discharged from the canister 20 to be supplied to the emergency cooling line P5. To cool the non-reactive gas being conveyed.

The second gas circulation pump 50a is mounted on the emergency cooling line P5 between the auxiliary gas cooling unit 90 and the fourteenth valve unit V14 and is electrically connected to the controller 70, Reactive gas that is discharged from the auxiliary gas cooling device 90 under the control of the controller (not shown).

The fourth temperature measuring unit TS4 is a thermometer for measuring the temperature of the non-reactive gas passing through the auxiliary gas cooling unit 90 and circulating along the emergency cooling line P5. Reactive gas which is mounted on the emergency cooling line P5 between the first gas circulation pump P2 and the second gas circulation pump P2 and is electrically connected to the controller 70 to discharge the gas from the auxiliary gas cooling device 90 And transmits the measurement signal to the controller 70.

1 and 3, the gas recovery line P6 is communicably connected between the first and third quick connectors QC1 and QC3 and is connected to the gas cooling device 30 and the third quick connector (QC3), recovers the non-reactive gas to pass through the section, supplies the recovered non-reactive gas to the gas circulation line when necessary, and the fifteenth and sixteenth valve means A low pressure tank 100, a high pressure tank 110, a compressor CP, a gas recovery pump 120, and a regulator RT.

The fifteenth and sixteenth valve means V15 and V16 are respectively mounted on both ends of the valve means and are electrically connected to the controller 70 to control the gas recovery line P6 Open and close.

The low pressure tank 100 is connected to the gas recovery line P6 to store the unreactive gas discharged from the canister 20 and transferred thereon,

The high pressure tank 110 is connected to the gas recovery line P6 between the low pressure tank 100 and the sixteenth valve means V16 so as to discharge the nonreactive gas discharged from the low pressure tank 100 Is stored at a high pressure.

The compressor CP is mounted on a gas recovery line P6 between the low pressure tank 100 and the high pressure tank 110 and is electrically connected to the controller 70 to control the compressor 70 under the control of the controller 70. [ Non-reactive gas discharged from the pressure tank 100 is extruded at a high pressure and flows into the high-pressure tank 110.

The gas recovery pump 120 is mounted on the gas recovery line P6 between the fifteenth valve means V15 and the low pressure tank 100 and is electrically connected to the controller 70, Reactive gas that is discharged and transferred from the canister 20 according to the control, and flows into the low-pressure tank 100. The low-

The regulator RT is mounted on the gas recovery line P6 between the high pressure tank 110 and the sixteenth valve means V16 to discharge the non-reactive gas discharged from the high pressure tank 110 Keep the pressure at the set pressure.

The spent nuclear fuel transport and storage canister drying apparatus 10 according to the present invention having the above-described structure can immediately detect when the drying process for the canister 20 is completed and detect the gas inflow and exhaust flow path of the canister 20 The operator is notified of the completion of the drying process and immediately detects the occurrence of a gas leak on the gas circulation line and detects the gas leak in any part of the gas circulation line simultaneously with the detection of the gas leak, The operator can be informed of the leakage period and the bypass line for bypassing the gas leakage section and bypassing the gas leakage section can be formed so that the drying process for the canister 20 can be continuously performed without interruption and the canister 20 And a series of functions of recovering and re-supplying the non-reactive gas filled in the gas circulation line, There is a need for a control method of a spent nuclear fuel transportation and storage canister drying apparatus according to the present invention.

Hereinafter, referring to FIGS. 4 to 7, a preferred embodiment of a control method of a spent nuclear fuel transporting and storage canister drying apparatus according to the present invention will be described.

Referring to FIG. 4, the control method of the spent nuclear fuel transportation and storage canister drying apparatus according to the present invention includes a canister drying step (S100), a measurement signal reception confirmation step (S200), a signal type confirmation step (S300) A first measurement temperature value confirmation step S400-1, a holding time count step S400-2, a measurement temperature signal reception step S400-3, a second measurement temperature value confirmation step S400-4, , A canister drying stop step S500, a drying step notification step S600, a measured pressure value checking step S700, a gas leakage line detecting step S800 and a non-reactive gas recovering step S900 do.

Referring to FIGS. 4 and 5, the canister drying step S100 includes a drying process for the spent nuclear fuel transporting and storage canister 20, a gas circulation line setting step S110, a non-reactive gas filling step (S120), a drying step (S130), and a gas heating step (S140).

The gas circulation line setting step S110 is a step in which the valve means V1 to V7 are opened and the valve means V8, V9, V10, and V11 are opened in a state in which the canister is mounted in communication with the gas circulation line, Is closed and the first and second gas circulation lines P1 (P1, P2) are closed by setting the closed state and the emergency cooling line P5, the gas recovery line P6, and the first and second bypass lines P7, P2) to allow the non-reactive gas to circulate.

The non-reactive gas filling step (S120) may include closing the canister, the first and second gas circulation lines (P1, P2) by opening the twelfth valve means (V12) after the gas circulation line setting step (S110) Reactive gas is supplied to set the pressure in the canister and the first and second gas circulation lines to a preset reference pressure value, and when the setting is completed, the twelfth valve means V12 is closed.

After the non-reactive gas filling step (S120) is completed, the drying step (S130) activates the gas cooling device (30) and the first gas circulation pump (50) to cool the canister (20), the first and second gases The canister 20 is dried by circulating the non-reactive gas filled in the circulation lines P1 and P2.

The gas heating step S140 heats the non-reactive gas flowing into the canister 20 through the gas cooling unit 30 to a preset temperature during the drying step S130. At this time, the predetermined temperature of the non-reactive gas is set according to the spent fuel heat output.

Referring to FIGS. 1 and 4 again, the measurement signal receipt confirmation step S200 may be performed by the temperature measurement means TS1 (TS2) or the pressure measurement means PS1 (PS2) during the canister drying step (S100) , It is confirmed whether or not the measured temperature is received.

The signal type checking step S300 checks whether the received measurement signal is a temperature signal if it is confirmed that the measurement signal has been received in the measurement signal reception confirmation step S200.

In the step of checking the first measured temperature value (S400-1), if the received signal is a temperature signal, the measured temperature value is compared with a predetermined reference temperature value in the signal type checking step (S300) Is below the reference temperature value. At this time, when the measured temperature value is received by the second and third temperature measuring means TS2 (TS3) which are the dew point thermometers for measuring the dew point, the reference dew point temperature value is a function of the pressure and the measured temperature value is the temperature When received at the first temperature measuring means (TS1) which is a thermometer, the reference temperature value is expressed as a function of pressure.

The holding time counting step S400-2 counts 30 minutes when the measured temperature value is lower than the reference temperature value in the first measured temperature value checking step S400-1.

The measuring temperature signal receiving step (S400-3) receives the measured temperature signal from the temperature measuring means when the holding time counting step (S400-2) is completed.

The second measurement temperature value confirmation step (S400-4) compares the measured temperature value received through the measurement temperature signal reception step (S400-3) with the reference temperature value, and determines whether the measured temperature value is less than the reference temperature value Check. At this time, when the measured temperature value is received by the second and third temperature measuring means TS2 (TS3) which are the dew point thermometers for measuring the dew point, the reference dew point temperature value is a function of the input and the measured temperature value is the temperature When received at the first temperature measuring means (TS1) which is a thermometer, the reference temperature value is expressed as a function of pressure.

If the measured temperature value is lower than the reference temperature value, the valve means V2 (V3) is closed and the canister drying step (S500) S100).

In step S600 of notifying the completion of the drying process, when the canister drying suspending step S500 is completed, a drying completion signal indicating that the drying of the canister 20 has been completed is outputted through the display 80, To indicate that it has been completed, so that the drying process for the next canister can proceed rapidly.

In step S700, the measured pressure value is compared with a predetermined reference pressure value. If the measured pressure value is greater than the reference pressure value, Or less.

Referring to FIGS. 1, 4, and 6, the gas leakage line detection step S800 may include a step of determining a measured pressure value (S700), if the measured pressure value is less than the reference pressure value, (S810), a first measurement pressure value confirmation step (S820) of the first pressure measurement means, a first-order gas circulation channel change step (S830), and a second gas pressure change step (S840), a first gas leakage section determination step (S850-1), a second gas leakage section determination step (S850-2), and a second pressure measurement step (S860), the 2 < st > -order gas circulation channel changing step S870, the third gas leakage section determination step S850-3, the fourth gas leakage section determination step S850 -4), a second measurement pressure value confirmation step (S880) of the second pressure measurement means, and a gas leakage section output step (S890).

The gas circulation division and operation step S810 is performed by closing the seventh and nineteenth valve means V7 and V19 and opening the thirteenth and fourteenth valve means V13 and V14, (V17) (V18) is opened and the auxiliary gas circulation pump 50a is operated to divide the gas circulation system into two gas circulation systems and operate.

In the step S820 of checking the first measured pressure value of the first pressure measuring means, the measured pressure value received from the first pressure measuring means PS1 is compared with a preset reference pressure value so that the measured pressure value is less than the reference pressure value Confirm whether it is.

The first-stage gas circulating passage changing step (S830) may include a step of determining a first measured pressure value of the first pressure measuring means (S820) if the measured pressure value received from the first pressure measuring means is less than the reference pressure value , The first and second valve means V1 and V2 are closed and the eighth and ninth valve means V8 and V9 are opened to change a part of the gas circulation passage.

The step S840 of checking the second measured pressure value of the first pressure measuring means determines whether the measured pressure value received from the first pressure measuring means PS1 after the first-order gas circulating passage changing step S830 is completed Is compared with a predetermined reference pressure value to confirm that the measured pressure value is less than the reference pressure value.

In the step S850-1 of determining the first gas leakage period, if the measured pressure value received from the first pressure measuring means is greater than or equal to the reference pressure value , The section between the first and second valve means (V1, V2) is determined as the gas leakage section.

In the second gas leak period determination step S850-2, if the measured pressure value received from the first pressure measurement means is less than the reference pressure value in the secondary measured pressure value verification step S840 of the first pressure measurement means , The interval between the third and fourth valve means V3 and V4 is determined as the gas leakage interval and the third and fourth valve means V3 and V4 are closed and the tenth and eleventh valve means V10) V11 to change a part of the gas circulation flow path.

The step of checking the first measured pressure value of the second pressure measuring means (S860) may include a step of checking the first measured pressure value of the first pressure measuring means (S820) If the pressure value is equal to or greater than the reference pressure value, the measured pressure value received from the second pressure measuring means PS2 is compared with a predetermined reference pressure value to check whether the measured pressure value is less than the reference pressure value.

In the step S870, the 2 < st > -order gas circulating flow path changing step S870 may be performed in a step S860 of checking the first measured pressure value of the second pressure measuring means. If the measured pressure value is less than the reference pressure value, The means V5 and V6 are closed and the twentieth and twenty-first valve means V20 and V21 are opened to change a part of the gas circulation passage.

The step of checking the second measured pressure value of the second pressure measuring means (S880) compares the measured pressure value received from the second pressure measuring means PS2 with a preset reference pressure value to determine whether the measured pressure value is less than the reference pressure .

If the measured pressure value received from the second pressure measuring means PS2 is equal to or greater than the reference pressure value in the second measured pressure value checking step S880 of the second pressure measuring means, If it is less than the pressure value, the section between the sixth and eighth quick connectors (QC6) and (QC8) on the second gas circulation line (P2) is determined as the gas leakage section.

In the fourth gas leakage interval determination step S850-4, if the measured pressure value received from the second pressure measurement means PS2 is greater than the reference pressure value in the second measured pressure value verification step S880 of the second pressure measurement means, If it is equal to or greater than the pressure value, the section between the seventh and eighth quick connectors (QC7) and (QC8) on the second gas circulation line (P2) is determined as the gas leakage section.

The gas leakage section output step (S890) outputs the corresponding section determined in the first gas leakage section determination step (S850-1) to the fourth gas leakage section determination step (S850-4) through display.

Referring to FIGS. 4 and 7, the non-reactive gas recovery step S900 may be performed after the gas leakage line detection step S800 is completed, if the detected gas leakage line is detected as the gas circulation line P2, Recovers non-reactive gas in line P2, and comprises a gas recovery line setting step S910 and a non-reactive gas recovery step S920.

The gas recovery line setting step S910 may include closing the seventh and nineteenth valve means V7 and V19 in the closed state and the fifth, sixth, fifteenth, eighteenth, twentieth and twenty first valve means V5 The first and second bypass lines P7 and P8 and the third quick connect QC3 at the fifth quick connect QC5 are set to the open state, And the gas circulation lines between the third quick connect (QC3) and the sixth quick couplet (QC6) are connected so as to communicate with the gas return line (P6).

The non-reactive gas recovery step S920 activates the gas recovery pump 120 and the compressor CP to recover the non-reactive gas in the gas circulation line.

In addition, the specific pressure value checking step S700, the first and second measured pressure value checking steps S820 and S840 of the first pressure measuring means, and the first and second measured pressure values of the second pressure measuring means The reference pressure value in step S860 (S880) is set to 0.3 MPa or a function of the spent fuel heat output

A canister drying apparatus having a gas circulation line according to the present invention having the above-described structure, a gas leakage detection section, a gas leakage occurrence section detection function, and a function of automatically forming a bypass circulation line and a control method of the drying apparatus, 20 is completed, it is immediately monitored to close the gas inlet and exhaust passage of the dried canister 20 and inform the operator that the drying process is completed so that the drying process for the next canister can be performed quickly A gas circulation line section in which a gas leakage occurs is detected and a bypass gas circulation line is formed to bypass the detected gas leakage section and bypass the gas leakage section, (20) is continued without interruption, and then the gas leakage period is outputted through the display (80) The operator can immediately perform the maintenance work for the section and can recover the non-reactive gas charged in the canister 20 and the gas circulation line, if necessary, to minimize the loss of the expensive non-reactive gas, The drying efficiency and the productivity of the drying process can be greatly improved, and the maintenance cost can be greatly reduced.

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

10: Canister drying device
20: Canister 30: Gas cooling device
40: non-reactive gas source 50: first gas circulation pump
50a: second gas circulation pump 60: first heater
60a: second heater 70: controller
80: display 90: auxiliary gas cooling device
100: Low pressure tank 110: High pressure tank
120: Gas recovery pump GSP: Gas supply line
P1: first gas circulation line P2: second gas circulation line
P3: first bypass line P4: second bypass line
P5: emergency cooling line P6: gas recovery line
P7: first bypass line P8: second bypass line
QC1: 1st quick connector QC2: 2nd quick connector
QC3: 3rd quick connector QC4: 4th quick connector
QC5: Fifth quick connector QC6: Fifth quick connector
QC7: 7th quick connector QC8: 8th quick connector
TS1 to TS3: Temperature measuring means V1 to V21: Valve means
CP: Compressor RT: Regulator
PS1 to PS3: Pressure measuring means
S100: canister drying step S200: measurement signal reception confirmation step
S300: Signal type identification step S400-1: First measurement temperature value identification step
S400-2: Holding time counting step S400-3: Measuring temperature signal receiving step
S400-4: Secondary measurement temperature value checking step S500: Canister drying stop step
S600: Notification of completion of drying process S700: Step of checking measured pressure value
S800: gas leak line detection step S900: non-reactive gas recovery step

Claims (10)

An apparatus for drying an internal space of a canister loaded with spent nuclear fuel, the apparatus comprising: a canister having an internal space having a gas inlet and a gas outlet; a first gas circulation line communicatively connected to the canister, A gas cooling device for cooling the non-reactive gas discharged from the space, and a non-reactive gas supply device connected to the canister and the gas cooling device by a second gas circulation line, A first gas circulation pump mounted on a second gas circulation line between the gas cooling device and the non-reactive gas source and pumping non-reactive gas carried along the first and second gas circulation lines, Reactive gas which is mounted on a second gas circulation line between the non-reactive gas source and the canister and which is supplied to the canister 1 heater, a first valve means mounted on a second gas circulation line between the first heater and the non-reactive gas source to open and close the second gas circulation line, and a second gas circulation line between the canister and the gas cooling device Second dew-point temperature measuring means for repeatedly measuring the dew-point temperature of the non-reactive gas that is mounted on the line and passing through the canister, and for transmitting the measurement signal; and second dew- And a controller for controlling an operation state of the first gas circulation pump and the heater in accordance with a signal received from the second dew-point temperature measuring means, respectively; 1. A canister drying apparatus for drying an internal space of a canister by circulating a non-reactive gas along first and second gas circulation lines connected to a canister via a canister, a gas cooling apparatus, and a non-
The drying apparatus includes:
A first gas circulation line P1 that is located on a first gas circulation line P1 that communicably connects the canister 20 and the gas cooling device 30 and branches the first gas circulation line P1, A quick connector (QC1);
A second quick connector for branching the first gas circulation line (P1) located on the first gas circulation line (P1) between the first quick connector (QC1) and the canister (20) (QC2);
The second gas circulation line P2 is located on the second gas circulation line P2 between the gas cooling device 30 and the gas circulation pump 50 and a third quick A connector QC3;
A fourth quick connector which is located on the second gas circulation line P2 between the gas circulation pump 50 and the heater 60 and branches the second gas circulation line P2 and quickly connects the other gas line QC4);
A first quick return pipe (P1) located on the first gas circulation line (P1) between the first and second quick connectors (QC1) and (QC2) to branch the first gas circulation line A connector QC5;
Is located on the second gas circulation line (P2) between the seventh valve means (V7) and the first gas circulation pump (50) and branches the second gas circulation line (P2) A sixth quick connector QC6;
The first gas circulation line P1 is positioned on the first gas circulation line P1 between the first and fifth quick connectors QC1 and QC5 and the seventh quick A connector QC7;
Is located on the second gas circulation line (P2) between the third quick connector (QC3) and the second pressure measurement means (PS2) and branches the second gas circulation line (P2) An eighth quick connector (QC8);
A first bypass line P7 for connecting between the fifth and sixth quick connectors QC5 and QC6;
A second bypass line P8 communicably connecting between the seventh and eighth quick connectors QC7 and QC8;
The first bypass line P7 is mounted on both ends of the first bypass line P7 and electrically connected to the controller 70 to control the first bypass line P7 according to the control of the controller 70. [ And 18th valve means V17 (V18);
The second bypass line P8 is electrically connected to the controller 70 and is electrically connected to the controller 70 so that the second bypass line P8 is interrupted under the control of the controller 70. [ And 21st valve means (V20) (V21);
Is mounted on the first gas circulation line P1 between the second quick connector QC2 and the fifth quick connector QC5 as an electromagnetic valve and is electrically connected to the controller 70 to control the controller 70 A nineteenth valve means V19 for interrupting the gas flow path between the second quick connector QC2 and the fifth quick connector QC5;
And is electrically connected to the controller 70 so as to be connected to the canister 20 under the control of the controller 70. The controller 70 is connected to the second gas circulation line P2, A second valve means (V2) for opening and closing a gas flow path between the heater and the heater (60);
And is electrically connected to the first gas circulation line P1 between the canister 20 and the second temperature measuring means TS2 and electrically connected to the controller 70 so that the canister (V3) for opening and closing the non-reactive gas flow path between the first temperature measuring means (20) and the second temperature measuring means (TS2);
Is mounted on the first gas circulation line P1 between the second quick connector QC2 and the second temperature measuring means TS2 and is electrically connected to the controller 70 so as to be disposed in the first gas circulation line P1 First pressure measuring means (PS1) for measuring pressure and transmitting the measuring signal to the controller (70);
And is electrically connected to the first gas circulation line P1 between the second quick connector QC2 and the first pressure measuring means PS1 and electrically connected to the controller 70 to control the controller 70 A fourth valve means V4 for opening / closing a non-reactive gas flow path between the second quick connector QC2 and the first pressure measuring means PS1 according to the first embodiment;
And is electrically connected to the first gas circulation line P1 between the first quick connector QC1 and the gas cooling device 30 as an electromagnetic valve and is electrically connected to the controller 70, A fifth valve means (V5) for opening / closing a non-reactive gas flow path between the first quick connector (QC1) and the gas cooling device (30);
And is electrically connected to the second gas circulation line P2 between the gas cooling device and the third quick connector QC3 as an electromagnetic valve and is electrically connected to the controller 70 to control the gas cooling A sixth valve means (V6) for opening and closing a non-reactive gas flow path between the device (30) and the third quick connector (QC3);
Is mounted on a second gas circulation line (P2) between the gas cooling unit (30) and the sixth valve unit (V6) and is electrically connected to the controller (70) First temperature measurement means (TS1) for measuring the temperature of the non-reactive gas circulated along the second gas circulation line (P2) and transmitting the measurement signal to the controller (70);
Is mounted on the second gas circulation line (P2) between the third quick connector (QC3) and the first gas circulation pump (50) and is electrically connected to the controller (70) (PS2) for measuring the pressure of the fluid, and transmitting the measurement signal to the controller (70);
And is electrically connected to the second gas circulation line P2 between the fourth quick connector QC4 and the first gas circulation pump 50 and electrically connected to the controller 70 to control the controller 70 A seventh valve means V7 for opening and closing the non-reactive gas flow path between the fourth quick connector QC4 and the first gas circulation pump 50 in accordance with the first and second embodiments;
The canister 20 and the fourth quick connector QC4 are connected to the second gas circulation line P2 separately from the second gas circulation line P2 through the fourth quick connector QC4, A first bypass line P3 for closing the second gas circulation line P2 section between the fourth quick connector QC4 and the canister 20 and transferring the non-reactive gas passing through the corresponding section in the bypass direction;
The canister 20 and the second quick connector QC2 are connected to the first gas circulation line P1 separately from the first gas circulation line P1 through the second quick connector QC2, A second bypass line P4 for closing the first gas circulation line P1 between the second quick connector QC2 and the canister 20 and bypassing the non-reactive gas passing through the second quick connector QC2 and the canister 20;
The first quick connector QC1, the gas cooling device 30, the third quick connector QC3, the first quick connector QC1, the second quick connector QC2, An emergency cooling line (P5) for closing the corresponding gas transfer section between the circulation pump (50) and the fourth quick connector (QC4) and transferring the non-reactive gas passing through the corresponding section;
The first and third quick connectors QC1 and QC3 are communicatively connected to each other so that the corresponding gas transfer section is closed between the gas cooling unit 30 and the third quick connector QC3, A gas recovery line (P6) for recovering non-reactive gas to pass through;
And a display (80) electrically connected to the controller (70) and outputting a status signal received from the controller (70) upon completion of drying, gas leakage, or component failure;
The non-reactive gas source (40)
Is connected in communication with the first gas circulation line (P1) between the second quick connector (QC2) and the fourth valve means (V4) by the gas supply line (GSP)
Is mounted on the gas supply line (GSP) between the non-reactive gas source (40) and the first gas circulation line (P1) and electrically connected to the controller (70) A twelfth valve means V12 for opening and closing the gas supply line GSP,
The discharge pressure of the non-reactive gas which is mounted on the gas supply line (GSP) between the non-reactive gas source (40) and the twelfth valve means (V12) And a regulator (RT) for regulating the gas leakage in the gas circulation line, and detecting the gas leakage, and automatically forming the bypass circulation line.
The method according to claim 1,
The first bypass line (P3)
V8 and V9 which are mounted on both end sides and are electrically connected to the controller 70 to open and close the first bypass line P3 under the control of the controller 70, and;
Is mounted on the first bypass line P3 between the eighth and ninth valve means V8 and V9 and is electrically connected to the controller 70 and is connected to the first bypass line And a second heater (60a) for heating the non-reactive gas to be fed along the gas circulation line (P3). The gas leakage detection, the gas leakage generation period detection and the bypass circulation line are automatically formed in the gas circulation line Wherein the canister is provided with a canister.
The method according to claim 1,
The second bypass line (P4)
Tenth and eleventh valve means V10 (V11) respectively mounted on both end sides to open and close the second bypass line P4;
The temperature of the nonreactive gas which is mounted on the second bypass line P4 between the tenth and eleventh valve means V10 and V11 and is discharged from the canister 20 through the second bypass line P4 A third temperature measuring means (TS3) for measuring and transmitting the measurement signal to the controller (70);
Is mounted on the second bypass line (P4) between the tenth and eleventh valve means (V10) (V11) to measure the pressure in the second bypass line (P4) and sends the measurement signal to the controller And a third pressure measuring means (PS3) for transmitting the gas to the gas circulation line. The gas canister is provided with a third pressure measuring means (PS3) for transmitting gas.
The method according to claim 1,
The emergency cooling line (P5)
Thirteenth and fourteenth valve means V13 and V14 which are respectively mounted on both ends and electrically connected to the controller 70 to open and close the emergency cooling line P5 under the control of the controller 70, and;
The non-reactive gas discharged from the canister 20 and conveyed along the emergency cooling line P5 is connected to the emergency cooling line P5 between the thirteenth and fourteenth valve means V113 and V14, (90);
Is installed on the emergency cooling line P5 between the auxiliary gas cooling unit 90 and the fourteenth valve unit V14 and is electrically connected to the controller 70 to control the auxiliary gas cooling unit A second gas circulation pump 50a for pumping non-reactive gas discharged from the first gas circulation pump 90;
Is installed on the emergency cooling line P5 between the auxiliary gas cooling apparatus 90 and the second gas circulation pump P2 and is electrically connected to the controller 70 so as to be discharged from the auxiliary gas cooling apparatus 90 And a fourth temperature measurement means (TS4) for measuring the temperature of the non-reactive gas and transmitting the measurement signal to the controller (70). The gas leakage detection means And a function of automatically forming a bypass circulation line.
The method according to claim 1,
The gas recovery line (P6)
15 and 16 valve means V15 and V16 which are respectively mounted on both ends of the valve and are electrically connected to the controller 70 to open and close the gas recovery line P6 under the control of the controller 70, and;
A low pressure tank 100 communicating with the gas recovery line P6 to store the nonreactive gas discharged from the canister 20 and transferred thereon;
A high pressure tank connected to the gas recovery line P6 between the low pressure tank 100 and the sixteenth valve means V16 to store the nonreactive gas discharged from the low pressure tank 100 at a high pressure, (110);
Pressure tank 100 is connected to the gas recovery line P6 between the low-pressure tank 100 and the high-pressure tank 110 and is electrically connected to the controller 70 and connected to the low-pressure tank 100 under the control of the controller 70 A compressor (CP) for extruding a non-reactive gas discharged from the compressor (110) to a high pressure and flowing into the high pressure tank (110);
Is mounted on the gas recovery line P6 between the fifteenth valve means V15 and the low pressure tank 100 and is electrically connected to the controller 70 and connected to the canister 20 under the control of the controller 70 A gas recovery pump 120 for pumping non-reactive gas discharged and transferred from the low pressure tank 100 to the low pressure tank 100;
A regulator (not shown) mounted on the gas recovery line P6 between the high-pressure tank 110 and the sixteenth valve means V16 to maintain the discharge pressure of the non-reactive gas discharged from the high- And a regulator (RT). The canister drying apparatus has a function of detecting a gas leakage, detecting a gas leak occurrence period, and automatically forming a bypass circulation line for the gas circulation line.
The method according to any one of claims 1, 3, and 4,
The first and fourth temperature measuring means TS1 and TS4 are thermometers for measuring the temperature of the non-reactive gas passing through the gas cooling device 30 and the auxiliary gas cooling device 90;
Characterized in that the second and third temperature measuring means (TS2) (TS3) are dew point thermometers for specifying the dew point temperature of the vapor contained in the non-reactive gas discharged from the canister (20) A canister drying apparatus having a function of automatically detecting a leak detection section, a gas leakage occurrence section, and a bypass circulation line.
An apparatus for drying an internal space of a canister loaded with spent nuclear fuel, the apparatus comprising: a canister having an internal space having a gas inlet and a gas outlet; a first gas circulation line communicatively connected to the canister, And a third gas supply line connected to the first gas circulation line between the second quick connector and the fourth valve means and connected to the first gas circulation line through a non- A twelfth valve means mounted on a third gas supply line between the first gas circulation lines for opening and closing the third gas supply line, and a third gas circulation line mounted on the third gas circulation line between the non- And a regulator for maintaining the discharge pressure of the non-reactive gas discharged from the reactive gas source at a predetermined pressure, A non-reactive gas source for storing a non-reactive gas; and a non-reactive gas source disposed on the second gas circulation line between the gas cooling device and the non-reactive gas source for pumping non-reactive gas transported along the first and second gas circulation lines A first heater which is mounted on a second gas circulation line between the non-reactive gas source and the canister to heat a non-reactive gas supplied to the canister, and a second heater circulating between the first heater and the non- A first valve means mounted on a second gas circulation line of the non-reactive gas to open and close the first gas circulation line, and a second valve means mounted on a second gas circulation line between the gas cooling device and the non- And a second dew point temperature measuring means for measuring the dew point temperature of the gas circulation pump and the heater and the dew point temperature measuring means, A controller for controlling an operation state of the gas circulation pump and the heater in accordance with a signal received from the measuring means, and a controller for controlling the operation of the gas circulation pump and the heater, A first quick connector for branching the first gas line and for connecting the other line quickly; and a second quick connector for branching the first gas circulation line located on the first gas circulation line between the first quick connector and the canister, A third quick connector located on a second gas circulation line between the gas cooling device and the gas circulation pump to branch off the second gas circulation line and to quickly connect another line; A fourth quick connector positioned on a second gas circulation line between the circulation pump and the heater to branch off the second gas circulation line and to quickly connect the other line and a fourth quick connector positioned between the first and second quick connectors A fifth quick connector located on the first gas circulation line for branching the first gas circulation line and for connecting the other line quickly, and a fifth quick connector for branching the first gas circulation line on the second gas circulation line between the seventh valve means and the first gas circulation pump A sixth quick connector positioned to branch the second gas circulation line and to quickly connect the other line, and a second gas circulation line located on the first gas circulation line between the first and fifth quick connectors to branch the first gas circulation line A seventh quick connector for quickly connecting the other line, and a second gas circulation line located on the second gas circulation line between the third quick connector and the second pressure measuring means to branch the second gas circulation line, A first bypass line for connecting the fifth and sixth quick connectors in a communicating manner, a second bypass line for connecting the seventh and eighth quick connectors in a communicating manner, The first bypass line Seventeenth and eighteenth valve means mounted on both ends of the second bypass line for interrupting the first bypass line, 20th and 21st valve means respectively mounted on both end portions of the second bypass line for interrupting the second bypass line, Seventeenth and eighteenth valve means respectively mounted on both ends of the bypass line for interrupting the bypass line, and a seventh and eighteenth valve means mounted on the first gas line between the second quick connector and the fifth quick connector, A second valve means mounted on a second gas line between the canister and the heater for opening and closing a gas flow path between the canister and the heater, , A temperature sensor mounted on the first gas line between the canister and the second quick connector for measuring the temperature of the non-reactive gas discharged from the canister along the first gas circulation line, and transmitting the measurement signal to the controller Third valve means for opening and closing a non-reactive gas flow path between the canister and the first dew point temperature measuring means, mounted on a first gas circulation line between the canister and the first dew point temperature measuring means, First pressure measuring means mounted on a first gas circulation line between the second quick connector and the first dew point temperature measuring means to measure the pressure in the first gas line and transmit the measuring signal to the controller, A fourth valve means mounted on a first gas circulation line between the second quick connector and the first pressure measuring means for opening and closing a non-reactive gas flow path between the second quick connector and the first pressure measuring means, A fifth valve means mounted on a first gas circulation line between the connector and the gas cooling device for opening and closing a non-reactive gas flow path between the first quick connector and the gas cooling device, A sixth valve means mounted on a second gas circulation line between the third quick connector and the third quick connector for opening and closing a non-reactive gas flow path between the gas cooling device and the third quick connector, A second pressure measurement means mounted on the second gas circulation line for measuring the pressure in the second gas circulation line and transmitting the measurement signal to the controller; A seventh valve means mounted on the gas circulation line for opening and closing a non-reactive gas flow path between the fourth quick connector and the first gas circulation pump, and a sixth valve means branched from the second gas circulation line through the fourth quick connector, The fourth quick connector is separately connected to the second gas circulation line, and when necessary, the second gas circulation line section between the fourth quick connector and the canister is closed, and the non-reactive gas passing through the fourth section is transferred A first bypass line and a first gas circulation line through which the canister and the second quick connector are connected separately from the first gas circulation line and connected between the second quick connector and the canister, A second bypass line for bypassing the first gas circulation line section of the first gas circulation line and transferring the non-reactive gas to pass through the section, and a second quick disconnect line connecting the second and fourth quick connectors in a communicative manner, An emergency cooling line for closing the gas transfer section between the connector, the gas cooling device, the third quick connector, the first gas circulation pump, and the fourth quick connector and for transferring the non-reactive gas passing through the section, 1 and the third quick connector, and, when necessary, closing the gas transfer section between the gas cooling device and the third quick connector, and recovering the non-reactive gas passing through the section, A display electrically connected to the controller and outputting a status signal received from the controller upon completion of drying, a gas leak, or a component failure; Gas leak detection for a gas circulation line that circulates a non-reactive gas along a first and a second gas circulation line connected to a canister via a canister, a gas cooling device, and a non-reactive gas source to dry the inner space of the canister, A method for controlling operation of a canister drying apparatus having a function of automatically detecting a generation interval and a bypass circulation line,
In the control method,
A canister drying step (S100) for performing a drying process on the spent nuclear fuel transportation and storage canister (20);
A measurement signal reception confirmation step (S200) of confirming whether a measurement temperature is received from the temperature measurement means (TS1) (TS2) or the pressure measurement means (PS1) and (PS2) while the canister drying step (S100) is executed;
A signal type checking step (S300) of confirming whether the received measurement signal is a temperature signal if it is confirmed that the measurement signal is received, in the measurement signal reception confirmation step (S200);
In the signal type checking step S300, if the received measurement signal is a temperature signal, the measured temperature value is compared with a predetermined reference temperature value, and a first measured temperature value An identifying step (S400-1);
(S400-2) for counting 30 minutes when the measured temperature value is lower than the reference temperature value in the primary measured temperature value checking step (S400-1);
A measuring temperature signal receiving step (S400-3) of receiving a measured temperature signal from the temperature measuring means when the holding time counting step (S400-2) is completed;
(S400-4) of comparing the measured temperature value received through the measuring temperature signal receiving step (S400-3) with the reference temperature value and confirming whether the measured temperature value is less than or equal to the reference temperature value, Wow;
In the secondary measurement temperature value confirmation step S400-4, if the measurement temperature value is lower than the reference temperature value, the canister dry stop step S123 for closing the valve means V2 (V3) and stopping the canister drying step (S100) (S500);
A drying step S600 of outputting a drying completion signal indicating completion of drying to the canister through the display when the canister drying stop step S500 is completed;
In the signal type checking step S300, if the received measurement signal is a pressure signal, the measured pressure value is compared with a preset reference pressure value, and a measured pressure value confirmation step (S700);
In the measuring pressure value checking step S700, if the measured pressure value is lower than the reference pressure value, a gas leakage line detecting step S800 for detecting a gas leakage position for the gas circulation line;
A non-reactive gas recovery step (S900) for recovering non-reactive gas in the gas circulation line (P2) if the detected gas leakage line is detected in the gas circulation line (P2) after the gas leakage line detection step (S800) Wherein the gas leakage detection section detects gas leakage, detects a gas leakage section, and automatically forms a bypass circulation line for the gas circulation line.
8. The method of claim 7,
The canister drying step (S100)
The valve means V1 to V7 are opened and the valve means V8, V9, V10 and V11 are closed and the emergency cooling line P5, respectively, in a state in which the canister is connected to the gas circulation line, The gas recovery line P6 and the first and second bypass lines P7 and P8 are set to the closed state so that the non-reactive gas is circulated along the first and second gas circulation lines P1 and P2 A gas circulation line setting step (S110) of setting a gas circulation line;
After the gas circulation line setting step S110 is completed, the twelfth valve means V12 is opened to supply the non-reactive gas into the canister, the first and second gas circulation lines P1 and P2, A non-reactive gas filling step (S120) of setting the pressure in the first and second gas circulation lines to a predetermined reference pressure value and closing the twelfth valve means (V12) when the setting is completed;
After the non-reactive gas filling step S120 is completed, the gas cooling apparatus 30 and the first gas circulation pump 50 are operated to open the canister 20, the first and second gas circulation lines P1 (P2 A drying step (S130) of drying the canister (20) by circulating a non-reactive gas filled in the canister (20);
And a gas heating step (S140) of heating the non-reactive gas flowing into the canister (20) through the gas cooling device (30) to a preset temperature while the drying step (S130) is being performed A gas leakage detection section for detecting a gas leakage section for the gas circulation line, and a function for automatically forming a bypass circulation line.
8. The method of claim 7,
The gas leakage line detecting step (S800)
The seventh and nineteenth valve means V7 and V18 are opened while the seventh and nineteenth valve means V7 and V19 are closed and the thirteenth and fourteenth valve means V13 and V14 are opened and the seventeenth and eighteenth valve means V17 and V18 are opened, Operating the circulation pump 50a to divide the gas circulation system into two gas circulation systems, and operating and operating the gas circulation system S810;
A first measured pressure value confirming step of the first pressure measuring means for comparing the measured pressure value received from the first pressure measuring means PS1 with a predetermined reference pressure value to confirm whether the measured pressure value is less than the reference pressure value S820);
If the measured pressure value received from the first pressure measuring means is less than the reference pressure value in the step of checking the first measured pressure value of the first pressure measuring means (S820), the first and second valve means V1 (S830) for opening the first and second valve means (V8, V9) and opening the eighth and ninth valve means (V8, V9) to change a part of the gas circulation passage;
After the first-order gas circulating passage changing step S830 is completed, the measured pressure value received from the first pressure measuring means PS1 is compared with a preset reference pressure value to determine whether the measured pressure value is less than the reference pressure value (S840) of the second measured pressure value of the first pressure measuring means for confirming the second measured pressure value;
If the measured pressure value received from the first pressure measuring means is equal to or higher than the reference pressure value in the step S840 of checking the second measured pressure value of the first pressure measuring means, the first and second valve means V1 (S850-1) of determining a section between the first gas leakage section and the second gas leakage section as a gas leakage section;
If the measured pressure value received from the first pressure measuring means is less than the reference pressure value in the step S840 of checking the second measured pressure value of the first pressure measuring means, the third and fourth valve means V3 (V4 The third and fourth valve means V3 and V4 are closed and the tenth and eleventh valve means V10 and V11 are opened to change a part of the gas circulation flow path A second gas leakage interval determination step (S850-2);
If the measured pressure value received from the first pressure measuring means PS1 is equal to or greater than the reference pressure value in the step S820 of checking the first measured pressure value of the first pressure measuring means, A step S860 of checking a first measured pressure value of the second pressure measuring means for comparing the measured pressure value received with the preset reference pressure value to check whether the measured pressure value is less than the reference pressure value;
If the measured pressure value is less than the reference pressure value, the fifth and sixth valve means (V5) and (V6) are closed, and the 20th and (S870) for opening the second valve means (V20) (V21) to change a part of the gas circulation flow path;
The second measured pressure value of the second pressure measuring means PS2 for comparing the measured pressure value received from the second pressure measuring means PS2 with a predetermined reference pressure value to confirm whether the measured pressure value is lower than the reference pressure Step S880;
If the measured pressure value received from the second pressure measuring means PS2 is less than the reference pressure value in the step S880 of checking the second measured pressure value of the second pressure measuring means, A third gas leakage interval determination step (S850-3) of determining a section between the sixth and eighth quick connectors (QC6) and (QC8) as a gas leakage section, and
If the measurement pressure value received from the second pressure measurement means PS2 is equal to or greater than the reference pressure value in the second measurement pressure value verification step S880 of the second pressure measurement means, A fourth gas leakage interval determination step (S850-4) of determining a section between the seventh and eighth quick connectors (QC7) and (QC8) as a gas leakage section;
And a gas leakage section output step (S890) of outputting a corresponding section determined in the first gas leakage section determination step (S850-1) to the fourth gas leakage section determination step (S850-4) through a display A gas leakage detection section for detecting a gas leakage section for the gas circulation line, and a function for automatically forming a bypass circulation line.
8. The method of claim 7,
The non-reactive gas recovery step (S900)
The seventh and nineteenth valve means V7 and V19 are closed and the fifth, sixth, fifteenth to eighteenth, twentieth and twenty first valve means V5 and V6 (V15 to V18) The first and second bypass lines P7 and P8 are set to the open state and the third and fourth quick connectors QC1 and QC2 are connected to the third and fourth quick connectors QC1 and QC2, A gas recovery line setting step (S910) in which all of the gas circulation lines between the sixth quick couplet (QC6) are connected in communication with the gas recovery line (P6);
And a non-reactive gas recovery step (S920) of operating the gas recovery pump (120) and the compressor (CP) to recover the non-reactive gas in the gas circulation line. A method of controlling a canister drying apparatus having a function of automatically detecting a leak occurrence section and a bypass circulation line.

Images