JP5578589B1 - Exhaust equipment for nuclear facilities - Google Patents

Abstract

It is an object of the present invention to provide an exhaust facility for a nuclear facility capable of quickly and reliably grasping the diffusion state of a radioactive substance immediately after the vent airflow is released.
A nuclear power plant comprising an exhaust pipe having an exhaust passage for flowing a vent airflow containing a radioactive substance discharged from a reactor containment vessel and an exhaust port for releasing the vent airflow from the exhaust passage into the atmosphere. An exhaust system for equipment, comprising: a visual substance supply means configured to be able to diffuse into the atmosphere together with a radioactive substance and to supply a visible substance that is visible to the vent airflow.
[Selection] Figure 1

Description

  The present invention relates to an exhaust facility for a nuclear facility that discharges a vent airflow generated when venting a reactor containment vessel to the atmosphere.

  In a nuclear facility, the pressure in the reactor containment vessel is controlled to be less than a predetermined value. However, when the reactor facility cooling function cannot be restored for a long time and the containment vessel pressure rises, water vapor is discharged from the containment vessel as an emergency decompression means to prevent damage to the containment vessel. (Vent) is performed.

  The vent airflow generated by the vent contains a radioactive substance although it can be reduced to some extent by passing through a filter or the like. For this reason, when the vent airflow is released from the exhaust facility into the atmosphere, the radioactive material is diffused into the surrounding environment. For this reason, in order to minimize public exposure to radioactive materials, it is required to predict the diffusion status of radioactive materials and to allow more people to understand.

  As a method for predicting the diffusion status of radioactive materials, a method for predicting the diffusion status of radioactive materials by analyzing data such as weather information and topographic information of the area where vent airflow is released using a computer has been proposed. (See Patent Documents 1 and 2). And the prediction result obtained by these methods can be grasped nationwide by being distributed to the terminal device from the business operator who performed the prediction, or being broadcast on television, radio or the like.

JP 2007-051876 A JP 2005-283202 A

  However, in the method as described above, it takes time to perform analysis using a computer, and it also takes time to distribute and broadcast the prediction result. In addition, in a situation where no terminal device, television, radio, etc. are owned, the prediction result cannot be grasped. Also, in the situation where the supply of power is lost, it is impossible to activate the computer that performs various data analysis, the equipment that distributes and broadcasts the prediction results, or the receiving equipment, so the diffusion status of radioactive materials can be predicted. , Can not be quickly known. For this reason, in the method as described above, it is impossible to quickly and reliably grasp the diffusion state of the radioactive substance immediately after the vent airflow is released into the atmosphere, and appropriately perform evacuation activities avoiding the radioactive substance. It has become difficult to do.

  Therefore, an object of the present invention is to provide an exhaust facility for a nuclear facility capable of quickly and reliably grasping a diffusion state of a radioactive substance immediately after a vent air flow is released into the atmosphere.

  An exhaust facility for a nuclear facility according to the present invention includes an exhaust passage for flowing a vent airflow containing a radioactive substance discharged from a reactor containment vessel, and an exhaust port for releasing the vent airflow from the exhaust passage into the atmosphere. An exhaust system for a nuclear power plant comprising an exhaust pipe having a visible substance supply means configured to be able to diffuse into the atmosphere together with a radioactive substance and to supply a visible substance configured to be visible to the vent airflow It is characterized by that.

  According to such a configuration, when the reactor facility cooling function cannot be restored for a long time, and the reactor containment vessel is vented as an urgent decompression means, the visible substance supply means changes to the vent airflow. The visible substance is supplied, and the visible substance is diffused into the atmosphere along with the vent airflow. At this time, since the visible substance can be visually confirmed, the diffusion state (direction and spread) of the visible substance can be easily grasped. Since the diffusion state of the visible substance corresponds to the diffusion state of the radioactive substance, by grasping the diffusion state of the visible substance, the diffusion state of the radioactive substance can be quickly and immediately after the vent air flow is released into the atmosphere. It is possible to grasp with certainty. Thereby, the evacuation activity which avoids a radioactive substance can be performed appropriately.

  It is preferable that the visual substance supply unit is configured to be able to supply the visual substance to the vent airflow outside the exhaust passage.

  According to such a configuration, since the visible substance is supplied to the vent airflow outside the exhaust passage, the visible substance is physically and chemically denatured due to the influence of the vent airflow (for example, the influence of temperature and pressure). It can be prevented that it becomes difficult to visually recognize or difficult to diffuse.

  Specifically, since the vent airflow is usually a high-temperature and high-pressure airflow containing water vapor, the high-temperature and high-pressure state may be maintained even when flowing through the exhaust passage. However, the vent airflow is released into the atmosphere, so that the temperature and pressure of the vent airflow are lower than the inside of the exhaust passage. For this reason, by supplying a visible substance to the vent airflow outside the exhaust passage, it is possible to prevent the visible substance from being denatured due to the influence of the vent airflow and becoming difficult to visually recognize or diffuse. .

  It is preferable that the visual substance supply unit is configured to be able to supply the visual substance into the exhaust passage.

  According to such a configuration, the visible substance is supplied to the vent airflow in the exhaust passage, and the visible substance is released into the atmosphere together with the vent airflow. Specifically, since the vent airflow is released from the exhaust flow path at a relatively high speed, the visible substance is pushed by the vent airflow at a position outside the exhaust flow path, and the visible substance is supplied to the vent airflow. May be difficult to do. On the other hand, the visible substance is supplied to the vent airflow by supplying the visible substance into the exhaust passage, and the visible substance is released into the atmosphere together with the vent airflow. Thereby, it is possible to quickly and reliably grasp the diffusion state of the radioactive substance immediately after the vent airflow is released into the atmosphere.

  The visual substance supply means stores a visual substance release unit that emits a visual substance, a pumped gas storage unit that stores a pressurized gas that pumps the visual material toward the visual substance discharge unit in a pressurized state, and stores the visual substance. And a flow path opening / closing means for opening / closing a flow path of the pumped gas between the pressurized gas storage section and the visible gas storage section, and the flow path opening / closing means is disposed in the exhaust flow path. It is preferable to include a windmill portion that is rotated by receiving the vent airflow and an opening / closing portion that opens the flow path of the pumped gas by the rotational force of the windmill portion.

  According to such a configuration, when the vent airflow circulates in the exhaust flow path, a rotational force is generated by rotating the windmill portion in response to the vent airflow, and the opening / closing portion is visually recognized as a pumped gas accommodating portion by the rotational force. Open the flow path of the pressurized gas to and from the substance reservoir. Thus, the pressurized gas is supplied from the pressurized gas storage unit to the visible substance storage unit, and the visible substance is pumped to the visible substance discharge unit by the pressurized gas. And a visual recognition substance is discharge | released from a visual recognition substance discharge | release part, and is supplied to vent airflow. In other words, since the visible substance is supplied to the vent airflow by the mechanical action of the rotational force of the wind turbine portion of the flow path opening / closing means, the visible substance is reliably supplied to the vent airflow even in a situation where power is not obtained. be able to.

  The visual substance supply means includes a visual substance storage member that is disposed in the exhaust channel and stores the visual material, and the visual material storage member releases the visual material into the exhaust flow channel by contact with a vent airflow. It is preferable to be able to be configured.

  According to such a configuration, the visible substance is accommodated in the exhaust passage by the visible substance accommodating member, and the visible substance is released into the exhaust passage by the contact between the visible substance accommodating member and the vent airflow. The visible substance can be supplied to the vent airflow by the visual substance supply means having a simple configuration. In addition, by arranging the visible substance containing member in the exhaust passage, the visible substance supply means can be installed in the exhaust pipe, so that the visible substance supply means can be easily installed in the existing exhaust pipe. Can do.

  The visual recognition material is composed of a plurality of particle groups having specific gravity corresponding to each of a plurality of radioactive materials having different specific gravities contained in the vent airflow, and each particle group has a different color for each specific gravity. Preferably, it is configured.

  According to such a configuration, it is possible to easily grasp the diffusion state of each radioactive substance by forming the visual recognition substance from a plurality of particle groups having specific gravity corresponding to each of a plurality of radioactive substances having different specific gravities. . Specifically, since the diffusion distance of the radioactive substance varies depending on the specific gravity of the radioactive substance, each particle group has the same diffusion distance as the corresponding radioactive substance of the specific gravity. And since each particle group has a different color, the diffusion distance for every particle group can be grasped | ascertained easily. Thereby, the diffusion distance of the radioactive substance of specific gravity corresponding to each particle group can be easily grasped.

  As described above, according to the present invention, it is possible to quickly and reliably grasp the diffusion state of the radioactive substance immediately after the vent airflow is released into the atmosphere.

The cross-sectional perspective view of the exhaust equipment for nuclear facilities which concerns on 1st embodiment, and the cross-sectional perspective view which expanded the part. The cross-sectional perspective view of the exhaust equipment for nuclear facilities which concerns on 2nd embodiment, and the cross-sectional perspective view which expanded the part.

  The present invention relates to an exhaust facility for a nuclear facility, and releases vent airflow generated when a reactor containment vessel (hereinafter referred to as containment vessel) is vented to the atmosphere. PCV venting is used as an urgent pressure reducing means when the reactor facility cooling function cannot be restored for a long time (such as a long-term power outage due to an earthquake or fire) and the PCV pressure rises. It is. For this reason, the vent airflow can only occur in an emergency, and does not occur during normal times. Therefore, the exhaust system according to the following embodiment functions only in an emergency, and does not function in normal times. The exhaust system according to the present invention is used not only for nuclear power generation equipment but also for the purpose of grasping the diffusion state of radioactive materials from nuclear power facilities such as a nuclear research institute, a nuclear submarine, and a nuclear aircraft carrier.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to FIG. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

  An exhaust facility (hereinafter also referred to as exhaust facility) 1 for a nuclear facility according to the present embodiment releases a vent airflow generated when a containment vessel (not shown) is vented to the atmosphere. . Specifically, the exhaust facility 1 includes an exhaust pipe 2 that discharges a vent airflow containing a radioactive substance into the atmosphere, and a visual material supply means 3 that supplies a visual recognition material that can be visually recognized to the vent airflow. With. Further, the exhaust facility 1 includes a connecting portion 4 that fluidly connects the storage container and the exhaust cylinder 2 and allows the vent airflow to flow into the exhaust cylinder 2.

  The exhaust cylinder 2 allows the vent airflow to flow into the exhaust passage 2R through which the vent airflow flows, the exhaust port 2a configured to release the vent airflow from the exhaust passage 2R into the atmosphere, and the exhaust passage 2R. And an inflow port 2b. In general, the exhaust port 2 a is formed at the upper end of the exhaust tube 2 so as to open upward, and the inflow port 2 b is formed at the lower end of the exhaust tube 2. The vent airflow flows into the exhaust passage 2R from the storage container side of the exhaust cylinder 2, flows through the exhaust passage 2R, and is released into the atmosphere from the exhaust port 2a of the exhaust cylinder 2.

  The visual substance supply unit 3 is configured to be able to supply the visual substance to the vent airflow outside the exhaust passage 2R. Specifically, the visual substance supply means 3 includes a visual substance release unit 3a that emits a visual substance, a pumped gas storage unit 3b that stores a pumped gas that pumps the visual substance toward the visual substance release unit 3a, A visual substance storage unit 3c that stores a visual substance, and a flow path opening / closing means 3d that opens and closes a flow path of the pressurized gas between the pressurized gas storage unit 3b and the visual material storage unit 3c.

  The visual substance discharge part 3a is formed at one end of the visual substance pumping pipe 3e through which the visual substance is pumped (specifically, by one end having an opening). The visual substance pumping tube 3e has a visual substance discharge part 3a formed at one end and a visual substance storage part 3c connected to the other end. Then, one end portion of the visible substance pressure feeding pipe 3 e is disposed in the vicinity of the exhaust port 2 a of the exhaust cylinder 2. As a result, the visible substance releasing unit 3a is configured to be able to release the visible substance with respect to the vent airflow outside the exhaust passage 2R (specifically, in the vicinity of the exhaust port 2a).

  The pressurized gas storage unit 3b is configured to supply a pressurized gas to the visual substance storage unit 3c and to pump the visual substance from the visual material storage unit 3c to the visual material discharge unit 3a. Specifically, the pressurized gas storage unit 3b is fluidly connected to the visual substance storage unit 3c via a pipe (hereinafter also referred to as a pressurized gas supply pipe) 3f. And the pressurized gas accommodating part 3b is a visible substance via the flow path (namely, it is a flow path of the pressurized gas supply pipe 3f, and is also hereafter referred to as a pressurized gas supply flow path) between the visible substance storage part 3c. It is comprised so that pressurized gas may be supplied to the storage part 3c. Specifically, in the pressurized gas storage unit 3b, the pressurized gas is stored in a pressurized state, and the visible gas storage unit 3c is opened by opening the pressurized gas supply channel (the channel of the pressurized gas supply pipe 3f). It is configured to release the pumped gas toward the side.

  In the pressurized gas storage unit 3b, the pressurized gas is preferably pressurized so that the visible substance can be released from the visible substance release unit 3a with a wind pressure stronger than the wind pressure of the vent airflow discharged from the exhaust port 2a. . Thereby, it can suppress that a visual recognition substance becomes difficult to be supplied in vent airflow by the wind pressure of vent airflow, and supply of the visual recognition material to vent airflow can be performed effectively.

  The visual substance storage part 3c is fluidly connected via a pressurized gas storage part 3b and a pressurized gas supply pipe 3f. The visual substance storage unit 3c supplies the visual substance together with the pressurized gas supplied via the flow path (that is, the pressurized gas supply flow path) to and from the pressurized gas storage unit 3b (specifically, the visual substance release unit 3a side). Is configured so as to be able to be discharged to the flow path of the visual substance pressure feeding pipe 3e.

  Here, the visible substance will be described. The visible substance is configured to be able to diffuse into the atmosphere together with the radioactive substance contained in the vent airflow. The form of the visual recognition substance is not particularly limited, but is preferably composed of a plurality of particles. The size of such particles is not particularly limited, and for example, the particle size is preferably 1 mm or more and 50 mm or less, and more preferably 5 mm or more and 10 mm or less. In addition, a particle size means the longest diameter of a visual recognition substance.

  The particles constituting the visual recognition substance may be homogeneous inside or may have voids inside. In the case where voids are formed inside the particles, such voids may be filled with a gas (such as hydrogen or helium) that is lighter than air. In this way, since the specific gravity of the particles can be adjusted by filling the gas lighter than air, it is possible to form a visual recognition material having a specific gravity corresponding to the specific gravity of the radioactive material. In addition, as long as such a space | gap is a predetermined volume with respect to the apparent volume of the particle | grains which comprise a visual recognition substance, it may exist in the particle | grains and may exist in the center part of particle | grains.

  The specific gravity of the visual recognition substance (specifically, each particle constituting the visual recognition substance) is not particularly limited, but is preferably a specific gravity corresponding to the specific gravity of the radioactive substance contained in the vent airflow. Specifically, the specific gravity of the visual recognition substance is preferably 90% or more and 110% or less with respect to the specific gravity of the radioactive substance. Moreover, it is preferable that a visual recognition substance is comprised from the several particle group which has specific gravity corresponding to each of several radioactive substance from which specific gravity contained in vent airflow differs. And it is preferable that each particle group is comprised so that it may have a different color for every specific gravity.

  The flow path opening / closing means 3d is configured to open a pressure-feed gas supply flow path (specifically, a flow path of the pressure-feed gas supply pipe 3f) when a vent airflow flows through the exhaust flow path 2R. That is, the flow path opening / closing means 3d closes the pressure gas supply flow path (specifically, the flow path of the pressure gas supply pipe 3f) in a state where the vent air flow does not flow through the exhaust flow path 2R, When the vent airflow circulates through the exhaust flow path 2R, the pressure supply gas supply flow path (specifically, the flow path of the pressure supply gas supply pipe 3f) is opened.

  The channel opening / closing means 3d includes an opening / closing portion 3g that opens and closes a pressurized gas supply channel (specifically, a channel of the pressurized gas supply pipe 3f), a windmill portion 3h that rotates by contact with the vent airflow, and the windmill. A transmission unit 3i that transmits the rotational force of the unit 3h to the opening and closing unit 3g. Then, the opening / closing part 3g and the transmission part 3i are connected via the shaft member 3j, and the windmill part 3h and the transmission part 3i are connected via the shaft member 3k, whereby the rotational force (torque) of the windmill part 3h is obtained. Is transmitted to the opening / closing part via the transmission part 3i.

  The opening / closing part 3g includes a valve body 3m having an opening / closing mechanism for opening / closing a pressure gas supply channel (specifically, a channel of the pressure gas supply pipe 3f), and opening / closing the valve body 3m by rotating about a shaft. And an opening / closing operation unit 3n for functioning the mechanism. Further, the opening / closing part 3g (specifically, the opening / closing mechanism of the valve body 3m) is supplied by the rotation of the shaft member 3j connected to the transmission part 3i or the rotation of the opening / closing operation part 3n (specifically, Is configured to open and close the flow path of the pressurized gas supply pipe 3f.

  The windmill portion 3h is disposed in the exhaust passage 2R, and is accommodated in the accommodating portion 3p that accommodates the windmill portion 3h so as to be rotatable by contact with the vent airflow. The windmill portion 3h includes a windmill portion base portion 3q connected to the shaft member 3k, and a plurality of blade portions 3r extending from the windmill portion base portion 3q. One end of the shaft member 3k is connected to the windmill 3h (specifically, the windmill base 3q), and the other end is connected to the transmission unit 3i. The rotation of the windmill 3h is transmitted to the transmission unit 3i. Configured to communicate.

  The accommodating portion 3p includes a pair of extending walls 3s extending from the wall surface forming the exhaust passage 2R, and the windmill portion 3h is accommodated between the pair of extending walls 3s. And it is comprised so that the front-end | tip part of the blade | wing part 3r in the windmill part 3h may be exposed in the exhaust flow path 2R from between the front-end | tip parts of the extension direction in a pair of extension walls 3s. Specifically, the one extending wall 3s is arranged on the upstream side of the vent airflow with respect to the windmill portion 3h, and covers the windmill portion 3h from the upstream side of the vent airflow (in the present embodiment, from below). It is formed, and it is constituted so that the tip part of blade part 3r in windmill part 3h may be located inside exhaust passage 2R rather than the tip part of the extension direction.

  The transmission part 3i is connected to the opening / closing part 3g (specifically, the valve body 3m) and the windmill part 3h via shaft members 3j and 3k. Moreover, the transmission part 3i is comprised so that the shaft member 3j may rotate, when the shaft member 3k rotates by rotation of the windmill part 3h. In this embodiment, the transmission part 3i is comprised so that the rotation direction (namely, rotation direction of the windmill part 3h) of the shaft member 3k may be converted into the rotation direction of the shaft member 3j. Moreover, the transmission part 3i is comprised so that the shaft member 3j may be rotated with a rotational force stronger than the rotational force (torque) of the shaft member 3k (windmill part 3h). That is, it is preferable to use a speed reducer as the transmission unit 3i.

  The connecting portion 4 includes a flow path (hereinafter also referred to as a connected flow path) 4R that is disposed between the containment vessel and the exhaust pipe 2 and allows the vent airflow to flow therethrough. And the connection part 4 is comprised so that the exhaust flow path 2R and the connection flow path 4R may connect via the inflow port 2b of the exhaust pipe 2. FIG.

  In the exhaust equipment 1 configured as described above, when a vent airflow is generated, the vent airflow flows into the exhaust passage 2R from the connection passage 4R through the inlet 2b. The vent airflow circulates in the connection channel 4R and the exhaust channel 2R toward the exhaust port 2a. At this time, the vent airflow comes into contact with the windmill portion 3h and rotates the windmill portion 3h. Then, the rotational force (torque) generated by the rotation of the windmill portion 3h is transmitted to the transmission portion (specifically, the speed reducer) 3i via the shaft member 3k, thereby rotating the shaft member 3j. As a result, the opening / closing mechanism of the valve main body 3m changes the pressure supply gas supply flow path (specifically, the flow path of the pressure supply gas supply pipe 3f) from the closed state to the open state.

  As described above, the pressurized gas supply channel (specifically, the channel of the pressurized gas supply pipe 3f) is opened, so that the pressurized gas is supplied from the pressurized gas storage unit 3b to the visual substance storage unit 3c. Then, the visible substance is pumped from the visible substance storage part 3c to the visible substance release part 3a. Then, the visually confirmed visual substance is supplied from the visual substance discharge part 3a to the vent airflow discharged from the exhaust port 2a of the exhaust pipe 2. Thereby, since the visible substance is diffused into the atmosphere together with the vent airflow, the diffusion state of the visible substance is visually confirmed, and the diffusion state of the radioactive substance can be grasped.

  As described above, in the exhaust facility 1 according to the first embodiment, when the cooling function of the nuclear reactor facility cannot be recovered for a long time and the containment vessel is vented, the visible substance supply unit 3 The visible substance is supplied to the vent airflow, and the visible substance is diffused into the atmosphere together with the vent airflow. At this time, since the visible substance can be visually confirmed, the diffusion state (direction and spread) of the visible substance can be easily grasped. And since the diffusion state of the visible substance corresponds to the diffusion state of the radioactive substance due to the diffusion of the vent air flow, the vent air flow was released into the atmosphere by understanding the diffusion state of the visible substance. It is possible to grasp quickly and reliably immediately after. Thereby, the evacuation activity which avoids a radioactive substance can be performed appropriately.

  Further, since the visible substance is supplied to the vent airflow outside the exhaust passage 2R, the visible substance is physically and chemically denatured due to the influence of the vent airflow (for example, the influence of temperature and pressure) and is difficult to visually recognize. It can be prevented that it becomes difficult to diffuse.

  Specifically, since the vent airflow is usually a high-temperature and high-pressure airflow containing water vapor, the high-temperature and high-pressure state may be maintained even when flowing through the exhaust passage 2R. However, when the vent airflow is released into the atmosphere, the temperature and pressure of the vent airflow are lower than the inside of the exhaust passage 2R. For this reason, by supplying a visible substance to the vent airflow from the outside of the exhaust passage 2R, it is possible to prevent the visible substance from being modified due to the influence of the vent airflow and becoming difficult to visually recognize or difficult to diffuse. it can.

  Further, when the vent airflow flows through the exhaust flow path 2R, the wind turbine part 3h of the flow path opening / closing means 3d is rotated by receiving the vent airflow, so that a rotational force is generated, and the opening / closing part 3g is pumped by the rotational force. The supply path (specifically, the flow path of the pressurized gas supply pipe 3f) is opened. Thus, the pressurized gas is supplied from the pressurized gas storage unit 3b to the visible substance storage unit 3c, and the visible substance is pumped to the visible substance discharge unit 3a by the pressurized gas. And a visual recognition substance is discharge | released from the visual recognition substance discharge | release part 3a, and is supplied to vent airflow. That is, since the visual recognition material is supplied to the vent airflow by a mechanical action by the rotational force of the windmill portion 3h of the flow path opening / closing means 3d, the visual recognition material is reliably supplied to the vent airflow even in a situation where power is not obtained. Can be supplied.

  In addition, since the visual recognition material is composed of a plurality of particle groups having specific gravity corresponding to each of a plurality of radioactive materials having different specific gravities, it is possible to easily grasp the diffusion state of each radioactive material. Specifically, since the diffusion distance of the radioactive substance varies depending on the specific gravity of the radioactive substance, each particle group has the same diffusion distance as the corresponding radioactive substance of the specific gravity. And since each particle group has a different color, it is possible to easily grasp the diffusion distance for each particle group, so it is possible to easily grasp the diffusion distance of the radioactive material having a specific gravity corresponding to each particle group. .

<Second embodiment>
Next, a second embodiment of the present invention will be described with reference to FIG. Compared with the exhaust facility 1 according to the first embodiment, the exhaust facility 10 for a nuclear facility according to the second embodiment mainly differs in the configuration of the visible substance supply means 30. Therefore, below, it demonstrates centering on a different point from 1st embodiment, and abbreviate | omits description by attaching | subjecting the same code | symbol to the same structure.

  The visible substance supply means 30 in the exhaust facility 10 is configured to be able to supply a visible substance to the exhaust passage 2R. Specifically, the visual substance supply unit 30 includes a visual substance storage member 30a that stores the visual substance. The visible substance storage member 30a is disposed in the exhaust flow path 2R, and is configured to be able to release the visible substance into the exhaust flow path 2R by contact with the vent airflow.

  Specifically, the visual recognition material accommodation member 30a includes an accommodation space 30R for accommodating the visual recognition material, and the accommodation space 30R intersects the substantially central portion of the exhaust passage 2R (specifically, intersects the flow direction of the vent airflow). (Over the entire cross section). In the present embodiment, the visual substance storage member 30a is formed in a bag shape so as to form the storage space 30R, and the exhaust pipe 2R that forms the exhaust passage 2R in a state where the visual recognition substance is stored in the storage space 30R. Mounted on the wall. The material constituting the visual substance storage member 30a is not particularly limited, and examples thereof include a net-like material having a mesh size that does not allow the particles of the visual material to pass through, a cloth material such as a nonwoven fabric, or a resin film. Can be mentioned. The breakage of the visible substance housing member 30a due to the contact with the vent airflow may be a physical breakage due to the wind pressure of the vent airflow or a fusing due to the heat of the vent airflow.

  In the exhaust facility 10 provided with the visual substance supply means 30 as described above, the vent air flow flowing through the exhaust passage 2R toward the exhaust port 2a comes into contact with the visual substance storage member 30a, so that the visual substance storage member 30a is Break. Thereby, the visible substance is released from the accommodation space 30R, and the visible substance is supplied to the vent airflow in the exhaust passage 2R. Thereby, since the visual recognition substance is released into the atmosphere together with the vent airflow and diffused, the diffusion state of the visual recognition substance is grasped visually, so that the diffusion state of the radioactive substance can be grasped.

  As described above, in the exhaust facility 10 according to the second embodiment, the visible substance is supplied to the vent airflow in the exhaust passage 2R, and the visible substance is reliably released into the atmosphere together with the vent airflow. Specifically, since the vent airflow is discharged from the exhaust flow path 2R at a relatively high speed, there is a risk of release due to external factors at a position outside the exhaust flow path 2R, and the visible substance is released when the vent is discharged. It may be difficult to supply only the vent airflow. On the other hand, the visible substance is supplied to the vent airflow by supplying the visible substance into the exhaust flow path 2R, and the visible substance is released into the atmosphere together with the vent airflow. Thereby, it is possible to quickly and reliably grasp the diffusion state of the radioactive substance immediately after the vent airflow is released into the atmosphere.

  Further, since the visible substance is accommodated in the exhaust flow path 2R by the visible substance accommodating member 30a, and the visible substance is released to the exhaust flow path 2R by the contact between the visible substance accommodating member 30a and the vent airflow, a simple configuration The visible substance can be supplied to the vent airflow by the visible substance supply means 30. Further, since the visible substance supply means 30 can be installed in the exhaust pipe 2 of the exhaust facility 10 by arranging the visible substance containing member 30a in the exhaust passage 2R, the exhaust pipe 2 of the existing exhaust equipment can also be installed. The visual substance supply means 30 can be easily installed.

  The nuclear power facility exhaust facility according to the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. Further, the configurations and methods of the plurality of embodiments described above may be arbitrarily adopted and combined (even if the configurations and methods according to one embodiment are applied to the configurations and methods according to other embodiments). Of course, it is of course possible to arbitrarily select configurations, methods, and the like according to various modifications described below and employ them in the configurations, methods, and the like according to the above-described embodiments.

  For example, in the first embodiment, the visible substance release portion 3a is disposed outside the exhaust passage 2R and is disposed in the vicinity of the exhaust port 2a. The discharge part 3a may be disposed in the exhaust flow path 2R. Thereby, since the visible substance discharge | release part 3a is located inside vent airflow, the visual recognition substance discharge | released from the visual substance discharge | release part 3a becomes easy to be supplied in vent airflow.

  Further, in the first embodiment, the visible substance releasing portion 3a is disposed outside the exhaust passage 2R and in the vicinity of the exhaust port 2a. However, the present invention is not limited to this, and the visible substance is not limited thereto. The discharge portion may be formed in an annular shape so as to surround the exhaust port 2a, and the visible substance may be discharged from a plurality of locations toward the central portion of the exhaust port 2a.

  In each of the above embodiments, the visible substance is supplied to the vent airflow immediately after being discharged from the exhaust port 2a of the exhaust pipe 2 and the vent airflow of the exhaust passage 2R, but is not limited thereto. For example, the visual substance discharge | release part 3a of 1st embodiment is arrange | positioned in the connection flow path 4R, or the visual confirmation substance accommodating member 30a used in 2nd embodiment is installed in the connection flow path 4R. Thus, the visual recognition material may be supplied to the vent airflow through the connection channel 4R.

  Moreover, in 1st embodiment, although the windmill part 3h and the opening-and-closing part 3g are connected via the transmission part 3i, it is not limited to this, The windmill part 3h and the opening-and-closing part 3g serve as a shaft member. The rotational force of the windmill portion 3h may be directly transmitted to the opening / closing mechanism of the opening / closing portion 3g.

  Moreover, in 1st embodiment, although the windmill part 3h and the accommodating part 3p are arrange | positioned in the exhaust flow path 2R, it is not limited to this, For example, the windmill part 3h and the accommodating part 3p are connected flow It may be arranged on the road 4R.

  Further, in the second embodiment, the visible substance storage member 30a is installed in the exhaust flow path 2R. However, the present invention is not limited to this. For example, the visible substance storage member 30a covers the exhaust port 2a. It may be installed.

  As described above, according to the exhaust facility for a nuclear facility according to the present invention, it is possible to quickly and reliably grasp the diffusion state of the radioactive material immediately after the vent airflow is released into the atmosphere.

  DESCRIPTION OF SYMBOLS 1,10 ... Exhaust equipment, 2 ... Exhaust pipe, 2R ... Exhaust flow path, 2a ... Exhaust port, 2b ... Inlet, 3,30 ... Visual substance supply means, 3a ... Visual substance discharge | release part, 3b ... Pressure-feed gas accommodating part 3c: Visual substance storage part, 3d: Channel opening / closing means, 3e: Visual substance pressure feeding pipe, 3f ... Pressurized gas supply pipe, 3g ... Opening / closing part, 3h ... Windmill part, 3i ... Transmission part, 3j, 3k ... Shaft member 3m ... Valve body, 3n ... Opening / closing operation part, 3p ... Accommodating part, 3q ... Windmill part base, 3r ... Blade part, 3s ... Extension wall, 4 ... Connecting part, 4R ... Connecting channel, 30a ... Visible substance accommodation Member, 30R ... accommodating space

Claims (6)

Exhaust for nuclear facilities comprising an exhaust pipe through which a vent airflow containing a radioactive substance discharged from a reactor containment vessel is circulated and an exhaust port through which the vent airflow is discharged from the exhaust passage into the atmosphere Equipment,
An exhaust facility for a nuclear facility, comprising: a visible material supply means configured to be able to diffuse into the atmosphere together with a radioactive material and to supply a visible material configured to be visible to the vent airflow.   2. The exhaust facility for a nuclear facility according to claim 1, wherein the visual material supply unit is configured to be able to supply a visual material to the vent airflow outside the exhaust passage.   2. The exhaust facility for a nuclear facility according to claim 1, wherein the visible substance supply unit is configured to be able to supply a visible substance into the exhaust passage.   The visual substance supply means stores a visual substance release unit that emits a visual substance, a pumped gas storage unit that stores a pressurized gas that pumps the visual material toward the visual substance discharge unit in a pressurized state, and stores the visual substance. And a flow path opening / closing means for opening / closing a flow path of the pumped gas between the pressurized gas storage section and the visible gas storage section, and the flow path opening / closing means is disposed in the exhaust flow path. 4. A wind turbine unit that is rotated by receiving a vent air flow, and an opening / closing unit that opens a flow path of the pumped gas by the rotational force of the wind turbine unit. 5. Exhaust equipment for nuclear facilities.   The visual substance supply means includes a visual substance storage member that is disposed in the exhaust channel and stores the visual material, and the visual material storage member releases the visual material into the exhaust flow channel by contact with a vent airflow. The exhaust system for a nuclear power plant according to claim 3, wherein the exhaust system is configured to be possible.   The visual recognition material is composed of a plurality of particle groups having specific gravity corresponding to each of a plurality of radioactive materials having different specific gravities contained in the vent airflow, and each particle group has a different color for each specific gravity. 6. An exhaust facility for a nuclear facility according to any one of claims 1 to 5, wherein the exhaust facility is configured.

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