JP2010190868A - Hydrogen treatment device for reactor container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydrogen treatment device for treating safely and inexpensively hydrogen gas generated in a reactor container. <P>SOLUTION: Storage of hydrogen gas by a hydrogen gas storage device 2 and discharge of the hydrogen gas from the hydrogen gas storage device 2 are repeated by a controller 15, while detecting a treating capacity of the hydrogen gas storage device 2. In this case, since a large amount of hydrogen gas generated in the reactor container 1 is treated in a batch system, resultantly reduction of the size and cost of the hydrogen gas storage device 2 is achieved. Further, since a hazardous material such as ammonia is not generated following treatment of the hydrogen gas, the hydrogen gas is treated safely. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an apparatus for treating hydrogen gas released into a nuclear reactor containment vessel.

  When the water level in the reactor pressure vessel decreases and the fuel temperature rises, the fuel cladding zirconium and water vapor react to generate hydrogen gas, which is released into the reactor containment vessel. In addition, in boiling water reactors that employ pressure suppression containment vessels, in the unlikely event that piping in the reactor containment vessel breaks, the radioactive material released from the broken portion flows into the pressure suppression pool, It is also assumed that pool water is radiolyzed to generate hydrogen gas and oxygen gas.

  Conventionally, in boiling water reactors, in order to cope with the generation of hydrogen gas, the atmosphere inside the reactor containment vessel during normal operation is replaced with nitrogen gas in advance to limit the oxygen gas concentration and prevent hydrogen gas combustion. is doing. Also, the gas in the reactor containment vessel is taken out with a blower, heated with an electric heater, recombined with hydrogen gas and oxygen gas, returned to water, and the water is cooled with a cooler with a cooler before the atoms are cooled. A combustible gas concentration control system using a thermal reaction type recombiner that returns to the reactor containment vessel is installed.

  In recent years, a recombiner using a hydrogen gas oxidation catalyst has been developed as a static hydrogen treatment method that does not require external power, and a hydrogen gas concentration reducing material consisting of a catalytic hydrogen reactant is placed in the reactor containment vessel. A technique for arranging the image has been proposed (see, for example, Patent Document 1).

  In addition, a technique for treating hydrogen gas in a reactor containment vessel using a hydrogen storage alloy or copper oxide that specifically reacts with hydrogen gas has been proposed (see, for example, Patent Document 2).

  Furthermore, a technique has also been proposed in which hydrogen gas is reacted with nitrogen gas in the containment vessel using an ammonia synthesis catalyst and converted into ammonia (see, for example, Patent Document 3).

JP-A-6-130170 Japanese Patent Laid-Open No. 10-288694 Japanese Patent No. 4073065

  By the way, even if a large amount of hydrogen gas is generated in the reactor containment vessel, the hydrogen gas burns immediately because the atmosphere in the reactor containment vessel is replaced with nitrogen gas during normal operation as described above. Although the possibility is low, since the reactor containment vessel is pressurized, a large amount of generated hydrogen gas needs to be processed quickly and safely.

  The method using a conventional thermal reaction type recombiner or a hydrogen gas concentration reducing material comprising a catalytic hydrogen reaction material described in Patent Document 1 requires an oxygen gas having a predetermined concentration or more for the treatment of hydrogen gas, so that the atmosphere is nitrogen. In a reactor containment vessel that has been replaced with gas and the oxygen gas concentration is limited to a low concentration, hydrogen gas cannot be processed efficiently.

  Further, in the method using hydrogen storage alloy or copper oxide described in Patent Document 2, the amount of hydrogen gas that can be processed is only about several percent of the weight of the hydrogen storage alloy or copper oxide. Assuming the case where it is discharged into the reactor containment vessel, a hydrogen storage alloy or copper oxide of several hundred tons order is required to process this, and the hydrogen processing apparatus becomes very large and expensive.

  Further, in the method using the ammonia synthesis catalyst described in Patent Document 3, a large amount of strongly alkaline and toxic ammonia is generated in the reactor containment vessel in the state of gas or liquid in the reactor containment vessel. Will be a major obstacle to recovery work.

  The present invention has been made in order to solve the problems of the prior art, and an object of the present invention is to provide a hydrogen treatment apparatus capable of processing hydrogen gas generated in a reactor containment vessel safely and at low cost. It is in.

In order to solve such problems, the present invention firstly, a hydrogen gas storage device provided outside the reactor containment vessel, and a heating device for heating the hydrogen gas storage device to release the stored hydrogen gas. A temperature supply device, a gas supply pipe for guiding an untreated gas in the reactor containment vessel to a gas introduction port of the hydrogen gas storage device, and a processed gas discharged from a gas discharge port of the hydrogen gas storage device. A return pipe that leads into the reactor containment vessel, a hydrogen discharge pipe that guides the hydrogen gas released from the hydrogen gas storage device, a first hydrogen concentration detection sensor that detects the hydrogen concentration in the reactor containment vessel, and Second hydrogen concentration detection means for detecting the hydrogen concentration of the treated gas flowing in the return pipe, third hydrogen concentration detection means for detecting the hydrogen concentration of the discharge gas flowing in the hydrogen discharge pipe, and each pipe As appropriate Comprising a flow path switching valve provided in location, and a controller for controlling the heating device and a drive of the channel switching valve,
When the detection value of the first hydrogen concentration detection sensor is equal to or greater than a predetermined value and the detection value of the second and third hydrogen concentration detection sensors is equal to or less than a predetermined value, The untreated gas in the reactor containment vessel is led to the gas inlet of the hydrogen gas storage device through the gas supply pipe while the heating device is switched to the stopped state, and the treated gas Switching the flow path switching valve so that the gas is led into the reactor containment vessel through the return pipe, and the hydrogen gas storage device stores hydrogen gas,
From this state, when the detection value of the second hydrogen concentration detection sensor is equal to or higher than a predetermined value, the gas supply pipe and the return pipe are shut off and the hydrogen discharge pipe is opened. And switching the flow path switching valve to switch the heating device to a driving state to release the hydrogen gas stored in the hydrogen gas storage device,
Further, from this state, when the detection value of the third hydrogen concentration detection sensor becomes equal to or lower than a predetermined value, the heating device is switched to a stopped state and the untreated gas in the reactor containment vessel Is passed through the gas supply pipe to the gas inlet of the hydrogen gas storage device, and the processed gas switching valve is led into the reactor containment vessel through the return pipe. By switching, the hydrogen gas storage device is configured to store hydrogen gas.

  According to this configuration, when the hydrogen concentration in the reactor containment vessel exceeds a predetermined value, the untreated gas in the reactor containment vessel is automatically introduced into the hydrogen gas storage device, and the hydrogen gas storage device Occlusion of hydrogen gas is performed. Further, from this state, when the detection value of the second hydrogen concentration detection sensor provided in the return pipe is equal to or higher than a predetermined value, the hydrogen gas storage capacity of the hydrogen gas storage device has reached the limit. Therefore, the introduction of untreated gas from the reactor containment vessel to the hydrogen gas storage device is automatically stopped, the hydrogen gas storage device is heated, and the stored hydrogen gas is released from the hydrogen gas storage device. Is done. Further, from this state, when the detection value of the third hydrogen concentration detection sensor provided in the hydrogen discharge pipe is equal to or lower than a predetermined value, it is determined that the hydrogen gas storage capacity of the hydrogen gas storage device has been recovered. Therefore, the untreated gas is again introduced from the reactor containment vessel into the hydrogen gas storage device.

  The present invention secondly, in the hydrogen treatment apparatus for the first reactor containment vessel, the gas supply pipe is provided with a mist filter, an iodine filter and a hydrogen permeable membrane in this order from the upstream side, and the hydrogen permeable membrane. A bypass pipe is provided to return the gas that has not permeated to the reactor containment vessel, and hydrogen gas that has permeated through the hydrogen permeable membrane is introduced into the hydrogen gas storage device through the gas supply pipe and permeated through the hydrogen permeable membrane. The gas that has not been returned is returned to the reactor containment vessel through a bypass pipe.

  According to this configuration, since the untreated gas from the reactor containment vessel is not directly introduced into the hydrogen gas storage device, only the hydrogen gas that has passed through the hydrogen permeable membrane is introduced into the hydrogen gas storage device. The hydrogen occlusion efficiency can be increased, and the hydrogen gas generated in the reactor containment vessel can be quickly processed. Further, since the gas supply pipe is provided with the mist filter and the iodine filter, the radioactive contamination on the downstream side can be reduced.

  Thirdly, in the hydrogen treatment apparatus for the first reactor containment vessel according to the present invention, the hydrogen discharge pipe includes a mist filter, an iodine filter, and an inert gas cylinder with a valve, and the controller supplies the hydrogen discharge pipe to the hydrogen discharge pipe. When releasing the hydrogen gas, the valve provided in the inert gas cylinder is opened to release the inert gas into the hydrogen discharge pipe.

  According to such a configuration, an inert gas cylinder is provided in the hydrogen discharge pipe, and the inert gas is released into the hydrogen discharge pipe when the hydrogen gas is discharged into the hydrogen discharge pipe. It can be diluted with an active gas. Therefore, high-concentration hydrogen gas is not released directly to the outside, and combustion can be prevented.

  Fourthly, in the hydrogen treatment apparatus for the first reactor containment vessel according to the present invention, the hydrogen release pipe is connected to the reactor containment vessel, and the hydrogen release pipe is provided with a recombination reaction device. An air supply device or an oxygen supply device is connected to the combined reaction device, and the controller opens the valve provided in the air supply device or the oxygen supply device when the hydrogen gas is released into the hydrogen release pipe, and then restarts the operation. Air or oxygen was supplied to the combined reaction apparatus.

  According to this configuration, the hydrogen release pipe connected to the reactor containment vessel is provided with the recombination reactor, so the hydrogen gas released from the hydrogen gas storage device is converted into water vapor by the recombination reactor and stored in the reactor. It can be returned to the vessel, and the pressure inside the reactor containment vessel, which has been increased by the generation of a large amount of non-condensable hydrogen gas, can be reduced quickly.

  According to the present invention, since a large amount of hydrogen gas generated in a nuclear containment vessel can be processed in a batch system, the hydrogen gas storage device can be reduced in size and cost, and ammonia can be reduced along with the processing of hydrogen gas. Since no toxic substances such as these are generated, hydrogen gas can be treated safely.

1 is a piping system diagram of a hydrogen treatment apparatus according to Embodiment 1. FIG. 3 is a flowchart illustrating a control procedure by a controller of the hydrogen treatment apparatus according to the first embodiment. It is a graph which shows the hydrogen concentration change of the reactor containment vessel at the time of providing the hydrogen treatment apparatus which concerns on Example 1. FIG. 6 is a piping system diagram of a hydrogen treatment apparatus according to Embodiment 2. FIG. 6 is a piping system diagram of a hydrogen treatment apparatus according to Embodiment 3. FIG. 6 is a piping system diagram of a hydrogen treatment apparatus according to Example 4. FIG.

  Hereinafter, embodiments of a hydrogen treatment apparatus for a nuclear reactor containment vessel according to the present invention will be described for each example with reference to the drawings.

  As shown in FIG. 1, the hydrogen treatment apparatus of this example includes a nuclear reactor containment vessel 1, a hydrogen gas storage device 2 provided outside the nuclear reactor containment vessel 1, and a release of the occluded hydrogen gas. A heating device 3 for heating the hydrogen gas storage device 2, a gas supply pipe 4 for guiding the untreated gas in the reactor containment vessel 1 to the gas inlet of the hydrogen gas storage device 2, and a gas for the hydrogen gas storage device 2 A return pipe 5 for guiding the treated gas discharged from the discharge port into the reactor containment vessel 1, a circulation pipe 6 for circulating the hydrogen gas released from the hydrogen gas storage device 2, and a branch from the circulation pipe 6. A hydrogen discharge pipe 7, a first hydrogen concentration detection sensor 8 for detecting the hydrogen concentration in the reactor containment vessel 1, and a second hydrogen concentration detection means for detecting the hydrogen concentration of the processed gas flowing in the return pipe 5 9 and the circulation gas flowing through the circulation pipe 6 The third hydrogen concentration detecting means 10 for detecting the elementary concentration, the blower 11 provided on the gas outlet side of the hydrogen gas storage device 2, and the gas inlet of the hydrogen gas storage device 2 are connected to the gas supply pipe 4 side or the circulation. A first flow path switching valve 12 for switching to the pipe 6 side, a second flow path switching valve 13 for switching the gas discharge port of the hydrogen gas storage device 2 to the return pipe 5 side or the circulation pipe 6 side, and the hydrogen discharge pipe 7 And a controller 15 for controlling driving of the heating device 3, the blower 11, and the flow path switching valves 12, 13, and 14.

  As the hydrogen gas storage device 2, a device using a hydrogen storage alloy, a device using copper oxide, or the like can be used. In the following, a case using a device using a hydrogen storage alloy will be described as an example. .

  Detection signals of the first to third hydrogen concentration detection sensors 8, 9 and 10 are input to the input terminal of the controller 15, and the output terminals of the controller 15 are the heating device 3, the blower 11, and the flow path switching valve 12. , 13 and 14. The controller 15 captures detection signals from the first to third hydrogen concentration detection sensors 8, 9, 10, the heating device 3, and at least when a large amount of hydrogen gas is generated in the reactor containment vessel 1. Recognition of the driving state of the flow path switching valves 12, 13, and 14 is started, and hydrogen gas generated in the reactor containment vessel 1 is processed according to the procedure shown in FIG.

  That is, after the controller 15 is activated, the detection value of the first hydrogen concentration detection sensor 8 is equal to or greater than a predetermined value, and the detection values of the second and third hydrogen concentration detection sensors 9, 10 are predetermined. If the temperature is below the predetermined value, the first flow path switching valve 12 is switched to the gas supply pipe 4 side while the heating device 3 is kept stopped, and the second flow path switching valve 13 is returned. Switch to the pipe 5 side and activate the blower 11. As a result, as shown in FIG. 1 (a), the untreated gas in the reactor containment vessel 1 is guided to the gas inlet of the hydrogen gas storage device 2 through the gas supply pipe 4, and the hydrogen gas storage device 2 is The treated gas that has exited is introduced into the reactor containment vessel 1 through the return pipe 5, and hydrogen gas is occluded by the hydrogen gas occlusion device 2.

In the hydrogen gas storage device 2, hydrogen gas is stored in the hydrogen storage alloy according to the following reaction formula (1). In the hydrogen storage alloy, hydrogen is stored by increasing the pressure or cooling the temperature to about room temperature. At this time, the heating device 3 is stopped.

  When the hydrogen gas storage amount of the hydrogen storage alloy increases, the processing capacity of the hydrogen gas storage device 2 decreases, so the amount of hydrogen gas that passes through the hydrogen gas storage device 2 and flows into the return pipe 5 increases. When the detection value of the second hydrogen concentration detection sensor 9 provided in the return pipe 5 becomes equal to or higher than a predetermined value, the first flow path switching valve 12 and the second flow path switching valve 13 are used. Are switched to the circulation pipe 6 side, the third flow path switching valve 14 is switched to the open state, and the heating device 3 is switched to the driving state. The heating device 3 heats the hydrogen gas storage device 2 to about 200 ° C.

When the hydrogen gas storage device 2 is heated to about 200 ° C., the hydrogen gas stored in the hydrogen storage alloy is released according to the following reaction formula (2).

  As shown in FIG. 1B, the hydrogen gas released from the hydrogen gas storage device 2 is released to the outside through the hydrogen release pipe 7 while circulating through the circulation pipe 6.

  When hydrogen gas is released from the hydrogen storage alloy, the processing capacity of the hydrogen gas storage device 2 is restored, and the hydrogen concentration in the gas flowing through the circulation pipe 6 and the hydrogen release pipe 7 is reduced. When the detection value of the third hydrogen concentration detection sensor 10 provided in the circulation pipe 6 becomes equal to or higher than a predetermined value, the heating device 3 is switched to the stopped state and the first flow path switching is performed. The valve 12 is switched to the gas supply pipe 4 side, the second flow path switching valve 13 is switched to the return pipe 5 side, and the third flow path switching valve 14 is switched to the closed state. As a result, the circuit configuration becomes as shown in FIG. 1A again, and the hydrogen gas storage device 2 starts storing hydrogen gas.

  The hydrogen treatment apparatus of this example repeatedly stores hydrogen gas by the hydrogen gas storage apparatus 2 and releases hydrogen gas from the hydrogen gas storage apparatus 2 while detecting the processing capacity of the hydrogen gas storage apparatus 2. A large amount of hydrogen gas generated in the vessel 1 can be processed in a batch system, and the hydrogen gas storage device 2 can be reduced in size and cost. As shown in FIG. The hydrogen concentration in the container 1 can be reduced stepwise. Moreover, since the hydrogen treatment apparatus of this example does not generate toxic substances such as ammonia with the treatment of hydrogen gas, the treatment of hydrogen gas can be performed safely.

  As shown in FIG. 4, the hydrogen treatment apparatus of this example includes a mist filter 16, an iodine filter 17, and a hydrogen permeable membrane 18 in this order from the upstream side of the gas supply pipe 4, and transmits the hydrogen permeable membrane 18. A detour pipe 19 for returning the gas that has not been returned to the reactor containment vessel 1 is provided. As the mist filter 16, a filter using inertial collision of moisture particles can be applied. Moreover, as the iodine filter 17, a charcoal filter or a silver filter using a reaction in which silver and iodine generate a compound can be applied. Furthermore, as the hydrogen permeable film 18, a silicon rubber permeable film, a ceramic film, a hydrogen permeable metal, or the like can be applied. The other parts are the same as those of the hydrogen treatment apparatus according to the first embodiment, and therefore the corresponding parts are denoted by the same reference numerals and description thereof is omitted.

  According to the hydrogen treatment apparatus of this example, the untreated gas from the reactor containment vessel 1 is not directly introduced into the hydrogen gas storage device 2, but only the hydrogen gas that has permeated the hydrogen permeable membrane 18 is supplied to the hydrogen gas storage device 2. Since it introduce | transduces, the hydrogen storage efficiency by the hydrogen gas storage apparatus 2 can be improved, and the hydrogen gas generated in the reactor containment vessel 1 can be processed rapidly. In addition, since the gas supply pipe 4 includes the mist filter 16 and the iodine filter 17, downstream radioactive contamination can be reduced.

  In the second embodiment, the gas supply pipe 4 includes the mist filter 16, the iodine filter 17, and the hydrogen permeable membrane 18. However, the gas supply pipe 4 may be configured to include at least one of them.

  As shown in FIG. 5, the hydrogen treatment apparatus of this example is characterized in that the circulation pipe 6 connected to the hydrogen release pipe 7 is provided with a mist filter 16, an iodine filter 17, and an inert gas cylinder 20 with a valve. The controller 15 opens a valve provided in the inert gas cylinder 20 to release the inert gas to the circulation pipe 6 when releasing the hydrogen gas to the hydrogen release pipe 7. The other parts are the same as those of the hydrogen treatment apparatus according to the first embodiment, and therefore the corresponding parts are denoted by the same reference numerals and description thereof is omitted.

  According to the hydrogen treatment apparatus of this example, the inert gas cylinder 20 is provided in the circulation pipe 6 connected to the hydrogen release pipe 7, and the inert gas in the cylinder 20 is released to the circulation pipe 6 when the hydrogen gas is discharged to the hydrogen release pipe 7. Therefore, the concentration of hydrogen gas passing through the hydrogen release pipe 7 can be diluted with an inert gas. Therefore, high concentration hydrogen gas can be prevented from being directly discharged to the outside, and combustion thereof can be prevented.

  As shown in FIG. 6, the hydrogen treatment apparatus of this example connects the hydrogen release pipe 7 to the reactor containment vessel 1, and the hydrogen release pipe 7 includes a recombination reaction apparatus 21, and the recombination reaction apparatus 21. An air supply device or an oxygen supply device 22 is connected to this. The controller 15 opens a valve provided in the air supply device or oxygen supply device 22 to supply air or oxygen to the recombination reaction device 21 when hydrogen gas is released into the hydrogen release pipe 7. As the recombination reaction apparatus 21, a thermal reaction type or an oxidation catalyst can be applied. The other parts are the same as those of the hydrogen treatment apparatus according to the first embodiment, and therefore the corresponding parts are denoted by the same reference numerals and description thereof is omitted.

  According to the hydrogen treatment apparatus of this example, since the recombination reaction device 21 is provided in the hydrogen release pipe 7 connected to the reactor containment vessel 1, the hydrogen gas released from the hydrogen gas storage device 2 is supplied to the recombination reaction device 21. Can be converted into water vapor and returned to the reactor containment vessel 1. Therefore, the pressure in the reactor containment vessel 1 that has increased due to the generation of a large amount of hydrogen gas, which is a non-condensable gas, can be reduced quickly.

  The present invention can be applied to the removal of hydrogen released into a reactor containment vessel.

DESCRIPTION OF SYMBOLS 1 Reactor containment vessel 2 Hydrogen gas storage device 3 Heating device 4 Gas supply piping 5 Return piping 6 Circulation piping 7 Hydrogen discharge piping 8 1st hydrogen concentration detection sensor 9 2nd hydrogen concentration detection means 10 3rd hydrogen concentration Detection means 11 Blower 12 First flow path switching valve 13 Second flow path switching valve 14 Third flow path switching valve 15 Controller 16 Mist filter 17 Iodine filter 18 Hydrogen permeable membrane 19 Detour piping 19
20 Inert gas cylinder 21 Recombination reactor 22 Air supply device or oxygen supply device

Claims (4)

A hydrogen gas storage device provided outside the reactor containment vessel, a heating device that warms the hydrogen gas storage device to release the stored hydrogen gas, and an untreated gas in the reactor containment vessel. A gas supply pipe that leads to a gas inlet of the hydrogen gas storage device, a return pipe that guides a treated gas discharged from a gas discharge port of the hydrogen gas storage device into the reactor containment vessel, and the hydrogen gas storage device A hydrogen discharge pipe for introducing hydrogen gas discharged from the first reactor, a first hydrogen concentration detection sensor for detecting a hydrogen concentration in the reactor containment vessel, and a first hydrogen concentration sensor for detecting the hydrogen concentration of the processed gas flowing in the return pipe. 2 hydrogen concentration detecting means, third hydrogen concentration detecting means for detecting the hydrogen concentration of the released gas flowing in the hydrogen releasing pipe, a flow path switching valve provided at an appropriate position of each pipe, Warming And a controller for controlling driving of the flow path switching valve,
When the detection value of the first hydrogen concentration detection sensor is equal to or greater than a predetermined value and the detection value of the second and third hydrogen concentration detection sensors is equal to or less than a predetermined value, The untreated gas in the reactor containment vessel is led to the gas inlet of the hydrogen gas storage device through the gas supply pipe while the heating device is switched to the stopped state, and the treated gas Switching the flow path switching valve so that the gas is led into the reactor containment vessel through the return pipe, and the hydrogen gas storage device stores hydrogen gas,
From this state, when the detection value of the second hydrogen concentration detection sensor is equal to or higher than a predetermined value, the gas supply pipe and the return pipe are shut off and the hydrogen discharge pipe is opened. The flow path switching valve is switched to, and the heating device is switched to a driving state to release the hydrogen gas stored in the hydrogen gas storage device,
Further, from this state, when the detection value of the third hydrogen concentration detection sensor becomes equal to or lower than a predetermined value, the heating device is switched to a stopped state and the untreated gas in the reactor containment vessel Is passed through the gas supply pipe to the gas inlet of the hydrogen gas storage device and the treated gas is led into the reactor containment vessel through the return pipe. A hydrogen treatment apparatus for a reactor containment vessel, wherein the hydrogen gas storage apparatus is switched to store hydrogen gas.   The gas supply pipe is provided with a mist filter, an iodine filter, and a hydrogen permeable membrane in this order from the upstream side, and provided with a bypass pipe for returning the gas that has not permeated the hydrogen permeable membrane to the reactor containment vessel, The hydrogen gas that has permeated the permeable membrane is introduced into the hydrogen gas storage device through the gas supply pipe, and the gas that has not permeated through the hydrogen permeable membrane is returned to the reactor containment vessel through a bypass pipe. Item 1. A hydrogen treatment apparatus for a nuclear reactor containment vessel.   The hydrogen release pipe is provided with a mist filter, an iodine filter and an inert gas cylinder with a valve, and the controller opens a valve provided in the inert gas cylinder when releasing hydrogen gas into the hydrogen release pipe, and 2. The reactor containment vessel hydrogen treatment apparatus according to claim 1, wherein an inert gas is discharged into the hydrogen discharge pipe.   The hydrogen release pipe is connected to the reactor containment vessel, the hydrogen release pipe is provided with a recombination reaction device, and an air supply device or an oxygen supply device is connected to the recombination reaction device. 2. The air or oxygen is supplied to the recombination reaction device by opening a valve provided in the air supply device or the oxygen supply device when releasing hydrogen gas into the discharge pipe. Hydrogen treatment equipment for nuclear reactor containment.

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