JP2010038831A - Anomaly detection equipment in nuclear power plant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide anomaly detection equipment in a nuclear power plant which can detect an anomaly quickly and can restore a spot where it appears even in piping and the like buried underground. <P>SOLUTION: Backup pipes P<SB>n-1</SB>, P<SB>n</SB>and P<SB>n+1</SB>are branched off from buried pipes D<SB>n-1</SB>, D<SB>n</SB>and D<SB>n+1</SB>and one end of each of the backup pipes is allowed to protrude over the ground. The end on the aboveground side of each of the backup pipes includes valves B<SB>n-1</SB>, B<SB>n</SB>and B<SB>n+1</SB>for bypasses and is usually closed down. In the buried pipes, emergency valves V<SB>n-1</SB>, V<SB>n</SB>and V<SB>n+1</SB>are provided while squeezing both ends of each of the backup pipes. Each of the emergency valves is usually opened and switching operations for opening and closing it is made possible by using means which can be manipulated from the ground such as extension valves E<SB>n-1</SB>, E<SB>n</SB>and E<SB>n+1</SB>. Data monitoring equipment MB monitors the presence or absence of the appearance of an anomaly and notifies workers of a spot where the anomaly appears when it happens. The workers connects the backup pipes located before and behind the spot where the anomaly appears with a bypass pipe BD<SB>n</SB>. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an abnormality detection facility for a nuclear power plant, and more particularly, to a means for detecting breakage caused by an earthquake of a buried pipe or a buried electric wire laid in the nuclear power plant and quickly recovering the break point.

  From the viewpoint of the effects of radiation on the environment that may occur due to an earthquake, facilities such as piping and electric wires of nuclear power plants are ranked in descending order of importance in terms of seismic design. are categorized. The S class and the B class are facilities that may diffuse radioactive materials to the outside due to loss of their functions, and belong to the former or the latter depending on the magnitude of the influence. On the other hand, the C class is a facility that is required to maintain safety equivalent to that of general industrial facilities. For example, a fire extinguishing system pipe or the like can be cited, and many of them are buried in the ground.

  At present, nuclear power plants are expected to enhance methods (instruction systems) for detecting, checking, and early recovery of equipment anomalies due to earthquakes, especially in light of the recent large earthquakes. For these facilities, the introduction of an instruction system that can be restored at an early stage is further desired.

As an instruction system at the time of an earthquake, for example, seismic accelerometers, acceleration data processing machines, data display screens, etc. installed in nuclear power plants are used to check accurate earthquake information and prompt inspections for workers. A system for displaying information to be performed is known (see, for example, Patent Documents 1 and 2).
Japanese Patent Publication No. 8-3549 JP-A-6-265692

  By the way, when including equipment with a low seismic importance class in the object of abnormality detection, it is necessary to consider that the quantity is huge and that it is buried in the ground. It is particularly desirable that the installation is as small and inexpensive as possible and can be easily installed, and that the restoration worker can easily perform restoration work on the ground.

  However, the instruction systems disclosed in Patent Documents 1 and 2 were developed for application to facilities having a high seismic importance class, such as accelerometers, computers, databases, input / output devices, etc. It is practically difficult to apply including equipment with a low seismic importance class because it is large and complex composed of

  The present invention has been made in view of such a state of the art, and its purpose is to quickly detect abnormalities in equipment such as piping and electric wires of a class having a low seismic importance, and to recover nuclear power at an early stage. The purpose is to provide power plant abnormality detection equipment.

  In order to solve the above-mentioned problem, the present invention firstly detects a plurality of spare facilities branched from a buried facility laid in a nuclear power plant and having a tip portion disposed on the ground, and the state of the buried facility. A state data transmitter having a state sensor and a wireless transmitter for wirelessly transmitting the state data output from the state sensor; and a state data transmitter provided at a tip of the spare equipment; and the state data transmitter A wireless receiver that receives state data transmitted from the threshold data, a threshold data table that stores threshold data for determining whether or not the state of the buried equipment is normal, and is received by the wireless receiver. The state data exceeds the threshold data stored in the threshold data table, it is determined that an abnormality has occurred in the buried equipment, and a determination means for specifying the abnormality occurrence point; and The error specified by the judgment means The occurrence point and the structure of and a data monitoring facility having a notification unit configured to notify the operator.

  According to this configuration, the state data transmission for arranging the front ends of a plurality of spare facilities branched from the embedded facility on the ground, detecting the state of the embedded facility at the front end and transmitting the state data wirelessly. Since the means is provided, it is possible to easily install the state data transmission means for a huge number of embedded facilities. In addition, it is equipped with a data monitoring facility that identifies the location of abnormalities in the buried equipment based on the status data transmitted from the status data transmission means and notifies the workers, so that the location of abnormalities can be quickly operated when an abnormality occurs. Staff can be notified, and the point where the anomaly has occurred can be recovered early.

  Secondly, in the abnormality detection facility of the first nuclear power plant, the present invention includes a recovery facility in an appropriate part of the buried facility and the spare facility, and stores the recovery device in the nuclear power plant. It was configured as follows.

  According to this configuration, since the restoration facility and the restoration equipment are provided on the ground in advance, the restoration work can be performed without excavation, and the abnormality occurrence point can be restored at an early stage.

  Thirdly, in the abnormality detection equipment of the first and second nuclear power plants, the present invention is characterized in that the buried equipment is a buried pipe, the spare equipment is a spare pipe branched from the buried pipe, and the state The sensor is an acceleration sensor that detects acceleration acting on the spare pipe.

  According to this configuration, since the acceleration sensor is installed in the spare pipe branched from the buried pipe, it is possible to accurately predict whether or not the buried pipe will break from the magnitude of the detected acceleration acting on the spare pipe, The buried piping can be repaired at an early stage.

  Fourthly, in the abnormality detection facility of the second nuclear power plant according to the present invention, the recovery facility is a bypass valve provided in the reserve pipe and an emergency valve provided in the buried pipe, The restoration equipment is a bypass pipe that can be connected to the spare pipe.

  According to this configuration, all the restoration equipment necessary for connecting the bypass pipe is prepared in advance in the predetermined part of the reserve pipe and the buried pipe, and the bypass pipe is stored in the nuclear power plant. It is possible to quickly recover the piping abnormality occurrence point. In other words, when the data monitoring facility notifies the worker of the location of the abnormality in the buried piping, the worker first goes straight to the location where the abnormality occurred, and the emergency valve and abnormality that were placed upstream of the location where the abnormality occurred The emergency valve disposed downstream of the point is switched to the closed state to stop fluid leakage. After that, the bypass pipe is taken out from the bypass pipe storage place and transported to the point of occurrence of the abnormality, and both ends thereof are arranged downstream of the first preliminary pipe and the point of occurrence of the abnormality. It connects with the arranged 2nd preliminary piping. Next, the emergency valve disposed upstream of the abnormality occurrence point is switched to the open state, and the bypass valve provided in the spare pipe is switched to the open state, so that the fluid flowing in the buried piping Flow through bypass piping that bypasses. Thereby, it is possible to recover the abnormality occurrence point. In this case, all the restoration equipment necessary for connecting the bypass pipes is provided in advance in the predetermined parts of the reserve pipes and the buried pipes, so that the work at the site can be minimized and the point where the abnormality occurs Can be recovered early.

  Fifth, in the fourth nuclear power plant abnormality detection facility, the present invention is configured such that the emergency valve is manually opened and closed by an operator.

  According to this configuration, since an emergency valve that can be opened and closed by an operator is used, even if the power system of the nuclear power plant is shut off in the event of an earthquake, necessary restoration work can be performed without delay.

  The present invention sixthly, in the abnormality detection equipment of the first and second nuclear power plants, the buried equipment is a buried electric wire, the spare equipment is a spare electric wire branched from the buried electric wire, and the state The sensor is an electrometer that measures the potential of the buried electric wire.

  According to this configuration, since the electrometer is installed on the spare wire branched from the buried wire, the state of the buried wire can be detected with high accuracy from the detected potential of the spare wire, and the broken buried wire can be repaired. Can be done early.

  Seventhly, in the abnormality detection facility of the second nuclear power plant according to the present invention, the recovery facility is a connection connector provided in the spare wire, and the recovery equipment is connected to the connection connector at both ends. The electric wire for bypass provided with the connectable connector was used.

  According to this configuration, all the restoration equipment necessary for connecting the bypass wires is prepared in advance in the predetermined part of the reserve piping, and the bypass wires are stored in the nuclear power plant. The point of occurrence can be quickly restored. That is, when the data monitoring equipment notifies the worker of the location where the buried electric wire is abnormal, the worker takes out the bypass wire from the storage location of the bypass electric wire and transports it to the abnormality occurrence location. And the connection connectors provided in advance at both ends of the bypass electric wire are arranged on the downstream side of the abnormality occurrence point with the connection connector provided on the first auxiliary pipe arranged upstream of the abnormality occurrence point. Further, by connecting to the connection connector provided in the second spare pipe, a bypass electric wire that bypasses the abnormality occurrence point can be wired, so that the abnormality occurrence point can be restored. In this case, all the restoration facilities necessary for connecting the bypass wires are provided in advance in the predetermined parts of the spare piping and the buried piping, so that the work at the site can be minimized and the point where the abnormality occurs Can be recovered early.

  Eighth, according to the present invention, in the second, fourth and seventh nuclear power plant abnormality detection facilities, the recovery equipment is stored in a recovery equipment storage facility installed for each predetermined section in the nuclear power plant. It was configured to be.

  According to this configuration, since the recovery equipment is stored in the recovery equipment storage facility installed for each predetermined section in the nuclear power plant, the distance between the recovery equipment storage facility and the point of occurrence of the abnormality can be shortened. In addition, it is possible to easily carry in the restoration equipment to the abnormality occurrence point, and it is possible to restore the abnormality occurrence point at an early stage.

  Ninthly, in the second, fourth and seventh nuclear power plant abnormality detection facilities, the present invention is configured such that the restoration equipment is stored in the data monitoring facility.

  According to this configuration, since the recovery equipment is stored in the data monitoring facility, an operator who has received a notification of the occurrence of an abnormality in the data monitoring facility immediately carries the recovery equipment to the location where the abnormality occurred. It is possible to go straight and restore the point of occurrence of an abnormality early.

  According to the tenth aspect of the present invention, in the abnormality detection equipment of the first to ninth nuclear power plants, the data monitoring equipment is provided with a seismic isolation device at the bottom.

  According to this configuration, since the seismic isolation device is provided at the bottom of the data monitoring facility, the safety of the data monitoring facility can be ensured even in the event of an earthquake, and the operator is notified of the location of the abnormality. This makes it possible to quickly and reliably restore the point of occurrence of an abnormality.

  According to the present invention, it is possible to appropriately detect an abnormality in a required buried facility by adding a spare facility, and therefore it is possible to easily detect an abnormality in a large number of buried facilities laid in a nuclear power plant. In addition, it is possible to quickly restore the point where the abnormality occurred. In addition, by providing spare equipment, it is possible to accurately detect abnormalities in buried facilities that are difficult for humans to access, so it is possible to easily detect abnormalities in buried facilities that have been difficult so far and to restore the locations where abnormalities have occurred. . Furthermore, since the status of the buried equipment is properly monitored by the status data transmission means and the data monitoring equipment, it is possible to grasp changes in the status of the equipment over time, and it is effective for planning inspections and replacements not limited to earthquakes. Can also be used as useful information.

  Hereinafter, a first embodiment of an abnormality detection facility for a nuclear power plant according to the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is an overall configuration diagram of the abnormality detection facility according to the first embodiment, FIG. 2 is a configuration diagram of state data transmission means provided in the abnormality detection facility according to the first embodiment, and FIG. FIG. 4 is a flowchart showing an abnormality determination procedure using the abnormality detection equipment according to the first embodiment, and FIG. 5 is provided with a seismic isolation device. It is explanatory drawing of a data monitoring facility. In addition, the subscripts n-1, n, n + 1 of the reference numerals shown in the figure indicate the installation points of the spare pipes.

As shown in FIG. 1, the abnormality detection facility according to the first embodiment includes an existing buried pipe D _n−1 , D _n , D _{n + 1} and an installation point n− of the spare pipes P _n−1 , P _n , P _{n + 1.} 1, n, determines the n + 1 arbitrarily, installation point n-1 of each surrounded by a broken line in FIG., n, in the n + 1, buried pipe _{D n-1,} D _n, preliminary pipe P branched from _{D n + 1 n−1} , P _n , and P _{n + 1} are connected to each other. One end of each of the auxiliary pipes P _n−1 , P _n , and P _{n + 1} is projected to the ground so that the worker can access it. By _- pass valves B _n−1 , B _n , and B _{n + 1} are provided at the end portions on the ground side of the spare pipes P _n−1 , P _n , and P _{n + 1} , and are normally closed. In the buried pipes D _n−1 , D _n , and D _{n + 1} , emergency valves V _n−1 , V _n , and V _{n + 1} are provided so as to sandwich both ends of the spare pipes P _n−1 , P _n , and P _{n + 1} . Each emergency valve V _n−1 , V _n , V _{n + 1} is normally open, and can be opened / closed using, for example, extension valves E _n−1 , E _n , E _{n + 1} that can be operated from the ground. .

In the required portions of the spare pipes P _n−1 , P _n , P _{n + 1} , the state of the buried pipes D _n−1 , D _n , D _{n + 1} is detected, and the detected state data T _n−1 , T State data transmission means S _n−1 , S _n , and S _{n + 1} having a function of wirelessly transmitting _n and T _{n + 1} are attached. The “state of the buried pipes D _n−1 , D _n , D _{n + 1} ” in the present embodiment is an acceleration acting on the spare pipes P _n−1 , P _n , P _{n + 1} . In the example shown in FIG. 1, the state data transmission means S _n−1 , S _n , S _{n + 1} are set on the surfaces of the bypass valves B _n−1 , B _n , B _{n + 1} exposed to the ground. However, it may be attached to the surface of the buried pipes D _n−1 , D _n , D _{n + 1 in} the ground as long as the radio can be normally transmitted. Since the latter is information of the buried piping itself, it is desirable as data directly.

As shown in FIG. 2, the state data transmission means S _n−1 , S _n , and S _{n + 1} include an acceleration sensor 1 attached to the surface of the spare pipes P _n−1 , P _n , and P _{n + 1} , and an acceleration. An A / D converter 2 that performs A / D conversion on the output signal of the sensor 1, and an output signal of the acceleration sensor 1 that has been A / D converted by the A / D converter 2 are used as state data T _n-1 , T _n , T It is composed of a wireless transmitter 3 that wirelessly transmits as _{n + 1} . The acceleration sensor 1 is made of, for example, general-purpose three-dimensional MEMS (Micro Electro Mechanical systems), and transmits three-dimensional accelerations a _x , a _y , a _z as state data T _n−1 , T _n , T _{n + 1.} Is used.

Hereinafter, an abnormality detection method for the buried pipes D _n−1 , D _n , D _{n + 1} using the abnormality detection facility according to the first embodiment configured as described above, and a recovery method when an abnormality is detected, This will be described with reference to FIGS.

The status data T _n−1 , T _n , T _{n + 1} transmitted from each status data transmitting means S _n−1 , S _n , S _{n + 1} is received by the data monitoring equipment MB, where The state of points n-1, n, n + 1 is monitored. The data monitoring equipment MB includes a radio receiver for receiving the status data T _n−1 , T _n , T _{n + 1} transmitted from the status data transmitting means S _n−1 , S _n , S _{n + 1} , and buried piping. Threshold data table for storing threshold data for determining whether or not the states of D _n−1 , D _n , and D _{n + 1} are normal, and status data T _n−1 received by the wireless receiver , T _n , T _{n + 1} exceed the threshold data stored in the threshold data table, it is determined that an abnormality has occurred in the buried pipes D _n−1 , D _n , D _{n + 1} and the abnormality has occurred. A determination means for specifying a point, and a notification means for notifying an operator of an abnormality occurrence point specified by the determination means. When an earthquake occurs, the determination means provides a buried pipe D _n−1 , D of determining _n, and D n + ₁ abnormalities such as leakage and rupture occurs If, abnormal and abnormality operator U notifies the point generated by the notification unit.

  As shown in FIG. 5, the data monitoring facility MB is particularly preferably provided with a seismic isolation device 6 made of, for example, general-purpose laminated rubber at the bottom. Thus, if the seismic isolation device 6 is provided at the lower part of the data monitoring facility MB, the safety of the data monitoring facility MB can be ensured even in the event of an earthquake. It is possible to perform the restoration of the abnormality occurrence point early and reliably.

The abnormality determination in the determination means is performed according to the procedure shown in FIG. That is, the state data T _n−1 , T _n , T _{n + 1} is received by the data monitoring equipment MB, and the threshold data table 4 incorporating the acceleration threshold at each point n−1, n, n + 1. To match. The threshold data is a value set in advance based on past knowledge or the like. As a result of the collation, when the detected acceleration data exceeds the threshold data, it is determined that an abnormality has occurred. For example, in the example of FIG. 4, state de - or x-direction acceleration of the motor _{T n a x} or y direction acceleration _{a y} is greater than 1000Gal, z direction acceleration _{a z} is above the 800Gal state de - data T _{For n−1} and T _{n + 1} , if it is determined that the threshold data does not exceed the acceleration in any direction, it is determined that an abnormality has occurred at point n. According to this method, it is of course possible to detect that an abnormality has occurred at a plurality of points simultaneously.

In the present embodiment, the preliminary pipe _{P n-1, P n,} P n + 1 or buried pipe _{D n-1, D n,} D n + state de the acceleration acting on ₁ - is used as the data, the present invention The gist is not limited to this, and any of the pressure difference in the pipe, the flow rate in the pipe, the flow rate difference in the pipe, and the relative displacement of the pipe between the two points in the buried pipes D _n-1 , D _n , D _{n + 1} Alternatively, a combination of these can be used as the status data. In that case, instead of the acceleration sensor 1 shown in FIG. 2, a general-purpose pressure gauge, flow meter, or displacement meter is installed.

As shown in FIG. 3, the worker U who has received the abnormality notification from the data monitoring equipment MB is directed to the points n−1 and n + 1 across the abnormality occurrence point n and uses the extension valves En ₋₁ and En _{+ 1} . Then, the valves near the n point of the emergency valves V _n−1 and V _{n + 1} are closed. Subsequently, among the bypass piping storage facilities BB installed for each predetermined section, the bypass piping BD _n stored in the bypass piping storage facility BB closest to the abnormality occurrence point n is replaced with the bypass piping storage facility BB. And then transported to an abnormality occurrence point n, and both ends thereof are connected to the spare pipes P _n−1 and P _{n + 1} . After that, the bypass valves B _n−1 and B _{n + 1} are opened, and the running water path is switched from the buried pipe to the bypass pipe BD _n to restore the operating state before the occurrence of the abnormality.

The bypass pipe BD _n, considering rapidity and ease of portability ease and connection operations, for example a general purpose fire extinguishing Ho - it is particularly desirable to use a scan lightweight products such as. In addition, it is particularly desirable to provide corresponding connection connectors at both ends of the bypass pipe BD _{n and} the front ends of the spare pipes P _n−1 , P _n , and P _{n + 1} in order to facilitate connection work.

In the above-described embodiment, the bypass pipe BD _n is stored in the bypass pipe storage facility BB installed for each predetermined section. However, instead of such a configuration, the data monitoring facility MB includes the bypass pipe BD _n. It can also be configured to save. According to such a configuration, the worker U who is notified of the occurrence of an abnormality can go straight from the data monitoring facility MB to the abnormality occurrence point n, so that the recovery operation can be further speeded up.

  Hereinafter, a second embodiment of an abnormality detection facility for a nuclear power plant according to the present invention will be described with reference to FIGS. FIG. 6 is an explanatory diagram showing an abnormality detection method and a recovery method using the abnormality detection facility according to the second embodiment, and FIG. 7 is a configuration diagram of a state data transmission means provided in the abnormality detection facility according to the second embodiment. FIG. 8 is a flowchart showing an abnormality determination procedure using the abnormality detection facility according to the second embodiment.

As shown in FIG. 6, the second embodiment of the present invention is characterized in that an abnormality detection target is an embedded electric wire C _n laid in an embedded electric wire CD _n . In the present embodiment, a plurality of spare conduits PC _n and PC _{n + 1} are branched from the buried conduit CD _n and the spare wires SC branched from the buried wire C _n in each of the spare conduits PC _n and PC _{n + 1} . _n and SC _{n + 1} are wired. Switches SW _n and SW _{n + 1} for recovery work are provided at the tip ends of the spare wires SC _n and SC _{n + 1} . Since others are the same as the abnormality detection equipment according to the first embodiment, illustration is omitted.

State de according to this embodiment - data transmission means S _n, S _n + _1, as shown in FIG. 7, the preliminary conduit PC _n, the generic attached to the surface of the PC n + ₁ the electrometer 5 (conduits through in direct contact with pre-wire SC _n, the SC n + ₁ wires Te and.), an a / D converter 2 is constituted by a radio transmitter 3, and wireless transmitter 3 is detected by the electrometer 5 potential _{v n-1, v n,} v n + 1 states de - data _{T n-1, T} n, are transmitted as _{T n + 1.}

The abnormality determination in the determination means is performed according to the procedure shown in FIG. That is, the state data T _n−1 , T _n , T _{n + 1} are received by the data monitoring equipment MB, and the threshold data with built-in voltage drop thresholds at the respective points n−1, n, n + 1. Check against Bull 4. The threshold data is a value that can be determined that the disconnection has occurred, in the example of FIG. 8, v _n and v _{n + 1} threshold potential difference is set to 20V, the point when the potential difference exceeds 20V n It is determined that a disconnection has occurred from point to point n + 1. Then, the worker U is notified from the point n to the point n + 1 as an abnormality occurrence point.

Operator U retrieves the bypass wire BC _n stored in the bypass pipe storage facility in BB located closest to the abnormal occurrence point n from the bypass wire storage facilities in BB transported to the abnormality occurrence point n, both ends Is connected to spare wires SC _n and SC _{n + 1} . Thereafter, the switches SW _n and Sw _{n + 1} are closed and the current path is switched from the buried electric wire C _n to the bypass electric wire BC _n to restore the operating state before the occurrence of the abnormality.

In order to facilitate the connection between the front ends of the spare wires SC _n and SC _{n + 1} and the both ends of the bypass wire BC _n , it is particularly desirable to provide connection connectors.

In addition, the operation of the bypass valves B _n−1 , B _n , B _{n + 1} and the switches SW _n−1 , SW _n , SW _{n + 1} can be automated instead of manually. Specifically, each of these bypass valves B _n−1 , B _n , B _{n + 1} and the switches SW _n−1 , SW _n , SW _{n + 1} are structured to operate by electromagnetic valves, and the opening and closing of these are instructed when an abnormality occurs. The transmission function to be performed may be added to the data monitoring facility MB, the reception function may be added to the solenoid valve, and the structure can be opened and closed by a command from the data monitoring facility MB. Obviously, this can be done with current technology. Such automation can also shorten the recovery time.

  Further, in this specification, the abnormality at the time of the occurrence of the earthquake has been described as an example, but it is also possible to cope with an abnormality that occurs due to other disasters (such as a tsunami or landslide).

It is a whole block diagram of the abnormality detection equipment which concerns on 1st Embodiment. It is a block diagram of the state data transmission means with which the abnormality detection equipment which concerns on 1st Embodiment is equipped. It is explanatory drawing which shows the abnormality detection method and recovery method using the abnormality detection equipment which concerns on 1st Embodiment. It is a flowchart which shows the abnormality determination procedure using the abnormality detection equipment which concerns on 1st Embodiment. It is explanatory drawing of the data monitoring equipment provided with the seismic isolation apparatus. It is explanatory drawing which shows the abnormality detection method and recovery method using the abnormality detection equipment which concerns on 2nd Embodiment. It is a block diagram of the status data transmission means with which the abnormality detection equipment which concerns on 2nd Embodiment is equipped. It is a flowchart which shows the abnormality determination procedure using the abnormality detection equipment which concerns on 2nd Embodiment.

Explanation of symbols

1 acceleration sensor 2 A / D converter 3 radio transmitter 4 threshold de - Vertical - table 5 electrometer _{D n-1, D n,} D n + 1 buried pipe _{P n-1, P n,} P n + 1 pre piping n-1 , n, n + 1 installation point _{B n-1, B n,} B n + 1 bypass valve _{V n-1, V n,} V n + 1 very valve _{E n-1, E n,} E n + 1 extension valve _{T n-1,} T _n , _{T n + 1} states de - data _{S n-1, S n,} S n + 1 state de - data transmission means MB de - data monitoring facility BB bypass wire plumbing BD _n bypass pipe CD _n buried conduit _{PC n,} PC _{n + 1} spare wire tube _{SC n,} SC _{n + 1} spare wire _{SW n,} SW _{n + 1} switch

Claims (10)

A plurality of spare equipment branched from the buried equipment laid in the nuclear power plant and having the tip arranged on the ground;
A state sensor for detecting the state of the embedded equipment, and a wireless transmitter for wirelessly transmitting the state data output from the state sensor; and a state data transmitting means provided at the tip of the spare equipment; ,
A wireless receiver for receiving state data transmitted from the state data transmitting means; a threshold data table for storing threshold data for determining whether or not the state of the buried equipment is normal; When the state data received by the wireless receiver exceeds the threshold data stored in the threshold data table, it is determined that an abnormality has occurred in the embedded equipment, and the abnormality occurrence point is determined. An abnormality detection facility for a nuclear power plant, comprising: a determination unit for specifying; and a data monitoring facility having a notification unit for notifying a worker of an abnormality occurrence point specified by the determination unit.   2. The nuclear power plant abnormality detection facility according to claim 1, wherein a recovery facility is provided in an appropriate part of the buried facility and the spare facility, and the recovery equipment is stored in the nuclear power plant.   The buried equipment is a buried pipe, the spare equipment is a spare pipe branched from the buried pipe, and the state sensor is an acceleration sensor that detects an acceleration acting on the spare pipe. The abnormality detection equipment for a nuclear power plant according to any one of claims 1 and 2.   The restoration facility is a bypass valve provided in the spare pipe and an emergency valve provided in the buried pipe, and the restoration equipment is a bypass pipe connectable with the spare pipe. The abnormality detection facility for a nuclear power plant according to claim 2, wherein the facility is an abnormality detection facility.   The abnormality detection facility for a nuclear power plant according to claim 4, wherein the emergency valve is opened and closed by a human operator.   The buried device is a buried wire, the spare device is a spare wire branched from the buried wire, and the state sensor is an electrometer that measures the potential of the buried wire. The abnormality detection equipment for a nuclear power plant according to claim 2.   The restoration equipment is a connection connector provided in the spare electric wire, and the restoration equipment is a bypass electric wire provided with a connection connector connectable to the connection connector at both ends. Anomaly detection equipment for nuclear power plants as described in 2.   The nuclear power plant according to any one of claims 2, 4 and 7, wherein the restoration equipment is stored in a restoration equipment storage facility installed for each predetermined section in the nuclear power plant. Anomaly detection equipment.   The abnormality detection equipment for a nuclear power plant according to any one of claims 2, 4, and 7, wherein the restoration equipment is stored in the data monitoring equipment.   The nuclear power plant abnormality detection facility according to any one of claims 1 to 9, wherein the data monitoring facility includes a seismic isolation device at a lower portion thereof.

Images