WO1997037358A1 - Centrale a energie nucleaire - Google Patents

Centrale a energie nucleaire Download PDF

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Publication number
WO1997037358A1
WO1997037358A1 PCT/JP1996/000855 JP9600855W WO9737358A1 WO 1997037358 A1 WO1997037358 A1 WO 1997037358A1 JP 9600855 W JP9600855 W JP 9600855W WO 9737358 A1 WO9737358 A1 WO 9737358A1
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WO
WIPO (PCT)
Prior art keywords
hydrogen
amount
gas
nuclear power
power plant
Prior art date
Application number
PCT/JP1996/000855
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English (en)
Japanese (ja)
Inventor
Hidefumi Ibe
Yoichi Wada
Yutaka Suzuki
Masahito Kobayashi
Original Assignee
Hitachi, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi, Ltd. filed Critical Hitachi, Ltd.
Priority to PCT/JP1996/000855 priority Critical patent/WO1997037358A1/fr
Publication of WO1997037358A1 publication Critical patent/WO1997037358A1/fr

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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C17/00—Monitoring; Testing ; Maintaining
    • G21C17/02—Devices or arrangements for monitoring coolant or moderator
    • G21C17/022—Devices or arrangements for monitoring coolant or moderator for monitoring liquid coolants or moderators
    • G21C17/0225—Chemical surface treatment, e.g. corrosion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Definitions

  • the present invention relates to a boiling water reactor, and more particularly, to a boiling water reactor in which hydrogen is injected into a reactor pressure vessel to suppress corrosion of a reactor structure.
  • hydrogen and oxygen are generated in an electrolyzer 107 for electrolyzing water to obtain hydrogen and oxygen.
  • the hydrogen is sent to the hydrogen injection device 1009 via the pipe 120, the gas pressure is increased, and then injected into the water supply pipe 1023.
  • the injected hydrogen is supplied to the water supply pump 10 1 1, water supply system piping 1 0 2 4, pressure vessel 100 1, main steam system 1 0 1 2, turbine 1 0 0 2, bleeding piping 1 0 1 3, gas extraction Circulation to vessel 103
  • the oxygen generated by the electrolyzer 1007 is mixed via the pipe 109, the oxygen injector 1008, and the pipe 108 so that the ratio of hydrogen to oxygen is 2: 1. Then, it is liquefied in a dehumidifier 1005 and is discarded.
  • Japanese Unexamined Patent Publication No. 59-220687 discloses a hydrogen recovery device using a membrane such as a palladium alloy membrane that selectively allows hydrogen gas to pass therethrough from the upstream side of the recombiner 104 shown in FIG. A technology for recovering and reusing hydrogen by using a technology has been disclosed.
  • the hydrogen recovery device using a membrane that selectively permeates hydrogen gas used in JP-A-59-220687 can recover only a part of the passing hydrogen in principle. For this reason, most of the hydrogen gas had to be converted to water by a recombination device, and the supply of oxygen using electrolysis of water was essential. Therefore, there is a problem that the cost for installing the water electrolyzer and the cost for electric power required for the electrolysis are increased, and the power generation cost per unit power is increased.
  • An object of the present invention is to separate as much hydrogen as necessary for injection of hydrogen into a reactor pressure vessel from gas extracted from a main steam system, and to completely recirculate the hydrogen, thereby making water electricity available.
  • An object of the present invention is to provide a nuclear power plant that does not require a cracking device and reduces the cost of a hydrogen injection device and its running cost. Disclosure of the invention
  • the difference in the boiling point of the gas is obtained by cooling the gas from the gas components contained in the main steam system of the nuclear power plant.
  • a hydrogen recovery device that separates and extracts only hydrogen by using a reactor and a nuclear power plant that has a mechanism to re-inject the extracted hydrogen into the reactor pressure vessel are provided.
  • the means for cooling the gas hydrogen recovery unit, a turbo chiller, H e condenser, N 2 condenser, water cooled ⁇ , air cooler, At least one of the heat exchangers will be provided with a nuclear plant.
  • the cooler described above can be of a general structure.
  • a plurality of these coolers are arranged in series in a closed vessel of a hydrogen recovery unit, and hydrogen and other gas components, oxygen, nitrogen, radioactive rare gas are efficiently cooled by gradually cooling the gas containing extracted hydrogen.
  • the components (hereinafter referred to as FP) can be separated.
  • the gas component contained in the main steam system is extracted from at least one location upstream of the oxygen-hydrogen recombiner or downstream of the dehumidifier.
  • a nuclear plant will be provided.
  • the oxygen-hydrogen recombiner is located downstream of the gas extractor installed in the condenser that is directly connected to the steam turbine that is rotated by high-temperature and high-pressure steam from the reactor pressure vessel. This is a device for combining water into water.
  • the dehumidifier is located downstream of the oxygen-hydrogen recombiner and separates only the water generated by the recombiner. On the downstream side of the oxygen-hydrogen recombiner, only hydrogen equivalent to the oxygen contained in the main steam system is reduced to water. By extracting the gas components contained in the main steam system from the upstream side of the oxyhydrogen recombiner, the maximum amount of hydrogen contained in the main steam system can be recovered.
  • the oxygen in the extracted gas is almost completely removed by the oxygen-hydrogen recombiner. Separation when extracting gas from downstream of dehumidifier Gas components are limited to hydrogen, nitrogen and radioactive noble gas components. Therefore, the configuration of the hydrogen recovery unit is simplified.
  • the point from which the gas component is extracted is preferably selected as appropriate according to the required amount of hydrogen and the production cost.
  • the nuclear power plant according to the first invention further comprising a storage tank for pressurizing and storing the hydrogen gas recovered by the hydrogen recovery device by a pressurizing pump.
  • the amount of injected hydrogen was controlled, and excess hydrogen was stored and stored if the amount of recovered hydrogen was insufficient for the injected amount.
  • hydrogen is made available. This improves the flexibility of hydrogen injection control.
  • a storage tank for this purpose, a tank or a cylinder for reducing the volume by increasing the pressure of hydrogen gas and storing the hydrogen gas is preferable.
  • a hydrogen storage tank using a hydrogen storage alloy containing at least one of Ti, V, Cr, N ⁇ , Pd, and U may be used.
  • a mechanism for calculating a required hydrogen injection amount to be injected into a reactor pressure vessel based on a surface corrosion potential of a reactor internal structure By controlling the amount of hydrogen recovered by the hydrogen recovery apparatus based on the result, a nuclear power plant that controls the amount of hydrogen injected into the reactor pressure vessel is provided.
  • Hydrogen injected into the reactor pressure vessel controls the amount of dissolved oxygen and controls the corrosion potential on the surface of the reactor structural material within a range where stress corrosion cracking does not occur.
  • To be injected Equipped with a device that calculates the amount of injected hydrogen based on the measured or calculated corrosion potential, and based on the calculation result of the device, controls the amount of hydrogen recovered by the hydrogen recovery unit, or sets the point at which gas is recovered Controlling the amount of hydrogen injection by selecting from the upstream side of the coupler or the downstream side of the dehumidifier suppresses the occurrence of stress corrosion cracking of the reactor structure and provides a highly reliable nuclear plant Can be.
  • a mechanism for calculating a required hydrogen injection amount to be injected into the reactor pressure vessel based on a surface corrosion potential of a reactor internal structure Based on the result, a required amount of the hydrogen recovered by the hydrogen recovery device is injected into a reactor pressure vessel, and a device for storing the hydrogen recovered in excess of the required amount is provided.
  • Nuclear power plant featured.
  • the function of storing the unnecessarily recovered hydrogen can be provided so that the operation of the sixth aspect of the present invention can be flexibly performed.
  • the nuclear power plant according to the sixth aspect further comprising a hydrogen replenishing mechanism for injecting hydrogen into the pressure vessel at an early stage of the reactor operation.
  • the hydrogen replenishing mechanism may be provided in the vicinity of the hydrogen injection device separately from the above-mentioned surplus recovered hydrogen storage tank, or by adding a hydrogen gas cylinder or the like to the storage tank. At this time, it may be possible to refill the storage tank.
  • an appropriate amount of hydrogen can always be secured, and even if a failure occurs in the hydrogen recovery unit and a sufficient amount of hydrogen cannot be recovered, the appropriate amount of hydrogen can be injected immediately. The amount can be secured, and in the meantime, flexible operation such as repairing the hydrogen recovery unit becomes possible.
  • the means for measuring the amount of injected hydrogen comprises a combination of a flow meter, a pressure gauge, and a thermometer
  • the means for adjusting the amount of injected hydrogen comprises hydrogen oxygen
  • a means for adjusting the amount of hydrogen separated from the gas upstream of the recombiner a means for changing the separation ratio between the stored hydrogen and the injected hydrogen
  • a means for adjusting the injection amount from the hydrogen replenishment tank A nuclear plant consisting of a combination of means will be provided. By doing so, more flexible operation of the nuclear power plant will be possible.
  • FIG. 1 is a configuration diagram showing one embodiment of the present invention.
  • FIG. 2 is a flowchart showing the steps of the above embodiment.
  • FIG. 3 is a configuration diagram showing another embodiment of the present invention.
  • FIG. 4 is a flowchart showing the steps of the above embodiment.
  • FIG. 5 is a configuration diagram showing another embodiment of the present invention.
  • FIG. 6 is a flowchart showing the steps of the above embodiment.
  • FIG. 7 is a diagram showing a configuration of a hydrogen separator.
  • FIG. 8 is a diagram showing another configuration of the hydrogen separator.
  • FIG. 9 is a diagram showing a configuration of a hydrogen distributor.
  • FIG. 10 is a configuration diagram showing a conventional hydrogen injection device. BEST MODE FOR CARRYING OUT THE INVENTION
  • the boiling points of the main gases coming out of the offgas system are hydrogen-25 ° C, oxygen-18 ° C and nitrogen-196 ° C, respectively.Hydrogen has the lowest boiling point. By liquefying other gases, hydrogen and other gases can be separated.
  • the required cooling capacity for separating hydrogen is described below.
  • the gas flow rate of the off-gas system was 1.2 mol / s for hydrogen, 0.6 niolZs for oxygen, and 0.1 mols for nitrogen.
  • the cooler efficiency is generally 30 to 60%, but when a cooler with 33% efficiency is used, the cooler operating capacity is
  • Cooler operating capacity Cooling heat amount 10 [kJZs] Z cooler efficiency 3 3 [%]
  • This cooler Becomes The operating capacity of this cooler is less than the operating capacity of the conventional hydrogen injector, which is less than 120 kVA.Hydrogen can be separated from other gases and recirculated. It is possible to recirculate the hydrogen without increasing the dose rate and maintaining the dose rate.
  • the operation capacity can be further reduced.
  • Cooler operating capacity Cooler operating capacity when cooling only with a cooler 4 [k VA]
  • the operating capacity of the cooler can be further reduced.
  • FIG. 1 shows a configuration of a hydrogen implantation apparatus according to one embodiment of the present invention.
  • the hydrogen injector is a hydrogen separator 0 105, a hydrogen distributor 0 108, a control unit 0 107, a hydrogen storage unit 109, a hydrogen amount measuring unit 0 111, a hydrogen refill unit 0 1 1, 4, booster 0 1 0, piping connecting dehumidifier 0 1 0 4 and hydrogen separator 0 1 0 5 0 1 1 8, piping connecting air extractor 0 1 0 3 and dehumidifier 0 1 0 4 0 1 9, Piping connecting dehumidifier 0 1 0 4 and hydrogen separator 0 1 0 5 0 1 2 0, control line connecting controller 0 1 0 ⁇ and hydrogen distributor 0 1 0 8 0 1 2 1, hydrogen Piping connecting the distributor 0 1 08 to the hydrogen storage unit 0 1 0 9 0 1 2 2,
  • the hydrogen separator 0 105 is a water cooler 0701, an air cooler 0702, a turbo cooler 0703, a heat exchanger 0704, and a mature exchange.
  • vessel 0 7 0 5 N 2 consists of the combination of the cooler 0 7 0 6, H e cooler 0 7 0 7.
  • water cooler 0701, air cooler 0702, turbo cooler 0707, heat exchanger 0704, heat exchanger 0705,, cooling Any one or more of the containers 0 706 may be omitted.
  • the arrangement of the water cooler 0701, the air cooler 0702, the turbo cooler 0703, the heat exchanger 0704, and the heat exchanger 0705 may be changed. As shown in Fig.
  • the hydrogen separator 0105 includes a water cooler 0801, an air cooler 0802, a turbo cooler 0803, a heat exchanger 0804, and a heat exchanger 0808. It consists of a combination of exchanger 0 805, N, cooler 0 806, He cooler 0 807, and oxygen and nitrogen exhaust piping 0 808. Of these coolers, one of water cooler 0801, air cooler 0802, turbo cooler 0803, heat exchanger 0804, heat exchanger 0805 One or more may be omitted. In addition, the arrangement of the water cooler 0801, the air cooler 0802, the turbo cooler 0803, the heat exchanger 0804, and the mature heat exchanger 0805 may be changed.
  • the hydrogen distributor 0108 is composed of a combination of a branch pipe 0901, a flow control valve 0902, and a flow control valve 0903.
  • the control device 0107 includes a combination of at least one of a PID controller and a computer.
  • the hydrogen reservoir 0 1 0 9 can be a gas cylinder or a cylinder, V, Cr, Ni, It consists of a hydrogen storage alloy containing at least one of Pd and U, or a combination thereof.
  • the hydrogen content measuring device 0 1 1 1 consists of a combination of a flow meter, thermometer and pressure gauge.
  • the hydrogen replenisher 0 1 1 4 may be a H 2 gas cylinder or a hydrogen storage alloy containing at least one of Ti, V, Cr, Ni, Pd, and U, or a combination thereof, and a flow control valve. Consisting of
  • the booster 0 1 10 comprises a compressor.
  • FIG. 2 shows the steps of this embodiment.
  • a signal to increase the hydrogen flow rate from the control device 0107 via the control line 0121 is sent from the control device 0107. It is sent to the replenisher 0114, and hydrogen is injected into the reactor water from the condensate system via the piping 0 1 2 5, the piping 0 1 2 6, the booster 0 1 10, the piping 0 1 2 7, and the piping 0 1 2 8.
  • the hydrogen injection position may be from the water supply system, reactor water purification system, recirculation system, or one or more of these injection positions in addition to the condensing system.
  • the dose rate in the core is high.
  • Step 0201 If hydrogen from the radiolysis to the off-gas system is present in excess of the required amount at the start of hydrogen injection, or if hydrogen injection is not required until the core dose rate increases and hydrogen is generated. Step 0201 is not performed, and control line 0121, hydrogen replenisher 0114, and piping 0125 may be omitted.
  • Step 202 the off-gas system gas passed through the air extractor 0 1 0 3, piping 0 1 1 7, dehumidifier 0 1 0 4 and piping 0 1 18 was converted into a hydrogen separator 0 1 0 Use 5 to separate hydrogen from other gases.
  • the other separated gas is sent to the FP processing system 0106 via the pipe 0119 to be vaporized by heat exchange and then exhausted after removing the FP with the rare gas hold-up device, or temporarily liquefied. Store and vaporize FP so that dose rate is below environmental standards And exhaust.
  • FP is trapped by a rare gas hold-up device and the hydrogen separator is configured as shown in Fig. 8
  • FP is vaporized before being led to the rare gas hold-up device.
  • the heat exchanger 0705 is not provided, and FP is not used as a refrigerant for hydrogen separation.
  • the separated hydrogen is sent to the hydrogen distributor 0 108 via the gas pipe 0 120, and in step 0 203, the separated hydrogen is injected using the hydrogen distributor 0 108 and the excess hydrogen is supplied.
  • Distribute to Excess hydrogen is stored in a hydrogen storage device 0109 via a pipe 0122.
  • the injected hydrogen is pressurized by the booster 0110 and injected from the condensate pump 0112 via the hydrogen meter 0111 and the piping 0128.
  • the amount of hydrogen is measured using the hydrogen amount measuring device 0111 in step 0204, and the measured amount is sent to the control device 0107 via the signal line 0123.
  • the positions of the hydrogen amount measuring device 0 1 1 1 and the booster 0 1 1 0 may be interchanged, and the steps 0 2 4 and 0 2 0 5 may be interchanged.
  • step 0205 If there is an excess or deficiency in the amount of injected hydrogen, adjust the amount of injected hydrogen in step 0205.
  • a control signal is sent from the control device 0107 to the hydrogen distributor 0108 via the control line 0121 to increase the amount of injected hydrogen.
  • a control signal is sent from the control device 0 107 to the hydrogen replenisher 0 1 1 4 via the control line 0 1 2 4, and the hydrogen replenisher 0 1 1 4 Inject hydrogen.
  • a control signal is sent from the control unit 0107 to the hydrogen distributor 0108 via the control line 0121 to distribute the hydrogen to the hydrogen distributor 0108. To reduce the amount of injected hydrogen.
  • step 206 confirm whether there is an instruction for hydrogen injection, and continue hydrogen injection In the case of, return to step ⁇ 0 2 and repeat the steps up to step 0 206.
  • a control signal is sent from the control unit 0 1 0 7 to the hydrogen distributor 0 1 0 8 via the control line 0 1 2 1, and all separated hydrogen is sent to the hydrogen storage 0 0 9 Change the distribution ratio to store.
  • a control signal is sent from the control device 0107 to the hydrogen replenisher 0114 via the control line 0121, and hydrogen injection is performed. Stop.
  • control device 0107 when the amount of hydrogen in the off-gas system is constant, the control device 0107, control line 0121, control line 0124, signal line 0123, and hydrogen measurement device 0111 are provided. Steps 0204 and 0205 may not be performed. Next, another embodiment of the present invention will be described with reference to FIGS. Fig. 3 shows a configuration diagram of the hydrogen injection device.
  • the hydrogen injector is a hydrogen separator 0 3 0 6, a hydrogen replenisher 0 3 0 8, a controller 0 3 0 9, a hydrogen amount measuring device 0310, a booster 0 3 1 1, a dehumidifier 0 3 0 5 and a hydrogen separator 0319, piping connecting hydrogen separator 0306 to FP processing system 0320, hydrogen separator 0303, and hydrogen measuring device 0310 0 3 2 1, Control line 0 3 2 2 connecting controller 0309 and hydrogen replenisher 0 3 0 8 Piping connecting hydrogen refill 3 0 8 and hydrogen meter 0 3 1 0 0 3 2 3 ,
  • the signal line 0 3 2 4 connecting the hydrogen meter 0 3 10 to the control device 0 3 09, the pipe connecting the hydrogen meter 0 3 10 to the booster 0311 0 3 2 5, the booster 0 3 It is composed of piping 0 3 2 6 connecting 1 1 and reactor water purification system 0 3 1 4, and one-way valve 0 3 3 2.
  • FIG. 4 shows the steps of the hydrogen implantation method in this embodiment.
  • An instruction to start hydrogen injection is given to the controller 0309, and in step 0401, a control signal for hydrogen injection is supplied from the controller 0309 to the hydrogen refiller 0308 via the control line 0322.
  • a control signal for hydrogen injection is supplied from the controller 0309 to the hydrogen refiller 0308 via the control line 0322.
  • supply hydrogen to the pipe 0 32 1 via the pipe 0 3 2 3.
  • This hydrogen is pressurized by the booster 0 311 and injected into the reactor water purification system 0 3 1 4 via the pipe 0 3 2.
  • Hydrogen can be injected from one or more of the water supply system and the recirculation system in addition to the reactor water purification system.
  • hydrogen is separated using a hydrogen separator 0306 in step 0402.
  • the separated FP is sent to the FP processing system 0309 via piping 0320 to be vaporized and separated by a rare gas hold-up device, then exhausted, or temporarily stored as liquefied. Exhaust while diluting so that the radiation dose rate is below the environmental standard.
  • the separated hydrogen is sent to a hydrogen content measuring device 0 310 via a pipe 0 3 2 1.
  • step 0403 measurement is performed using a hydrogen amount measuring device 0310, and the amount of hydrogen is sent to the control device 0309 via the signal line 0324. If the amount of hydrogen is appropriate, proceed to step 0405. If there is an excess or deficiency in the amount of hydrogen, perform step 0404.
  • this step is omitted, and the hydrogen amount measurement device 0310 and the signal line need not be installed.
  • step 0404 a control signal is sent from the control device 0309 via the control line 0322 in response to the excess or deficiency of hydrogen, and the hydrogen flow rate is adjusted by adjusting the hydrogen flow rate from the hydrogen replenisher. To adjust.
  • step 0403 and step 0404 are omitted, and a constant hydrogen replenishment amount is replenished from the hydrogen replenisher 0308, and the controller 0 3 0 9, Control line 0 3 2 2 need not be installed
  • step 0405 it is checked whether or not there is an instruction for hydrogen injection. If hydrogen injection is to be continued, the process returns to step 0402 and repeats the steps up to step 0404. In the case of stopping hydrogen injection, reverse the booster 0 3 1 1 and measure the amount of hydrogen with the hydrogen amount measuring device 0 310 until hydrogen is supplied to the hydrogen replenisher 0 308 until there is no more hydrogen to be separated. Stop after accumulating.
  • the hydrogen injector is an off-gas distributor ⁇ 504, a hydrogen separator 507, a controller 509, a hydrogen meter 510, a booster 511, a hydrogen refiller 511 5.
  • the hydrogen separator 0 5 0 7, the control device 0 5 0 9, the hydrogen amount measuring device 0 5 10, the booster 0 5 11 1, and the hydrogen replenisher 0 5 15 are the same as those in the first embodiment. Is used.
  • the off-gas distributor 0504 similar to the hydrogen distributor of the first embodiment, one composed of a branch pipe and a flow control valve is used.
  • oxygen replenisher 0 5 3 7 a combination of an oxygen cylinder and a flow control valve is used.
  • FIG. 6 shows a hydrogen implantation step of the present embodiment.
  • Input hydrogen injection Start to the control unit 0509, and in step 0601, increase the amount of hydrogen injected from the control unit 0509 to the hydrogen replenisher 0 5 1 5 via the control line 0 5 2 5 And send the signal to the booster 0 5 1 1 via the pipe 0 5 2 6, the pipe 0 5 2 7, the hydrogen amount measuring instrument 0 5 1 0, the pipe 0 5 2 8, and the pipe ⁇ 5 3 0 Inject hydrogen into recirculation system 0 5 1 4 via.
  • the hydrogen injection position may be from one or more of the condensing system, the water supply system, and the reactor water purification system in addition to the recirculation system.
  • the injected hydrogen and the hydrogen generated by the radiolysis of water are first extracted into the gas extractor 0503, and then distributed by the off-gas distributor 0504.
  • the hydrogen flow rate of the off-gas system gas is about 1.4 nio l Z s during the rated operation, and the hydrogen fraction is about 60%, so the bypass off-gas amount is calculated by the controller 0509 based on that,
  • the distribution ratio of the off-gas distributor 0504 is controlled via a control line 0521.
  • step 0603 the distributed recombiner 0505 and the gas recombined downstream are mixed with the gas bypassing the recombiner 0505, and the offgas dehumidifier 0500
  • the hydrogen separator 0507 is connected via pipe 0 5 2 3 To separate hydrogen and other gases.
  • the other separated gas is sent to the FP processing system 0508 via the pipe 0524, and is exhausted after removing FP with the rare gas hold-up device or stored in a temporarily liquefied state. Exhaust while evaporating so that it is below the environmental standard.
  • step 0604 the amount of hydrogen is measured using the hydrogen amount measuring device 0510, and the amount of hydrogen is transmitted to the control device 0509 via the signal line 0529 and the water is measured. If the elementary amount is appropriate, the process proceeds to step 0606, and if the amount of hydrogen is excessive or deficient, the process proceeds to step 0605 and then to step 0606. In step 0605, if the amount of hydrogen is excessive, the distribution ratio of the offgas distributor 0504 from the control device 0509 via the control line 0521 to reduce the bypass amount of the recombiner To change.
  • the distribution ratio of the off-gas distributor 0504 is changed from the controller 0509 via the control line 0521 so as to increase the bypass amount of the recombiner. Furthermore, if the amount of hydrogen is insufficient even if all off-gas is bypassed from the recombiner, the hydrogen replenisher 0 5 10 is operated from the control device 0 5 0 9 via the control line 0 5 2 5 Top up with hydrogen. If the amount of hydrogen in the off-gas system is stable, do not install the hydrogen amount measuring device 0 5 10, control line 0 5 2 1, and signal line 0 5 2 9. 0 5 need not be performed.
  • step 0606 it is determined whether or not hydrogen injection has been completed. To continue the hydrogen injection, repeat the hydrogen injection steps from step 062 to step 0606.
  • the offgas distributor 0504 is operated from the control device 0509 via the control line 0521 to set the amount of offgas that bypasses the recombiner to 0, and the control device 0 Operate the oxygen replenisher 0 5 3 7 from 5 09 via the control line 0 5 3 8, replenish oxygen to the recombiner 0 5 0 5 via the pipe 0 5 39, and remove hydrogen in the off-gas. Convert to H 2 ⁇ and dehumidifier Process with 0 5 0 6

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

L'objet de cette invention est de fournir un appareil d'injection d'hydrogène ainsi que le procédé afférent. Selon ce procédé, on sépare l'hydrogène à recycler de tous les autres gaz ou d'une partie de ceux-ci, afin de maintenir le vide dans les parties permettant une fermeture hermétique d'une turbine, ce qui a pour effet de réduire les coûts. Afin d'atteindre cet objectif, l'invention fournit une centrale à énergie nucléaire comportant un dispositif de récupération de l'hydrogène permettant les seules séparation et extraction de l'hydrogène des composants gazeux se trouvant dans le système principal de vapeur et ce, en jouant sur les différences existant entre les températures d'ébullition des gaz par refroidissement de l'hydrogène. L'invention fournit également un mécanisme permettant une nouvelle injection de l'hydrogène extrait dans une enceinte sous pression du réacteur nucléaire.
PCT/JP1996/000855 1996-03-29 1996-03-29 Centrale a energie nucleaire WO1997037358A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001349983A (ja) * 2000-06-12 2001-12-21 Toshiba Corp 沸騰水型原子力発電プラントの運転方法
JP2016502102A (ja) * 2012-12-21 2016-01-21 ジーイー−ヒタチ・ニュークリア・エナジー・アメリカズ・エルエルシーＧｅ−Ｈｉｔａｃｈｉ Ｎｕｃｌｅａｒ Ｅｎｅｒｇｙ Ａｍｅｒｉｃａｓ， Ｌｌｃ 沸騰水炉用運転始動／運転停止水素注入システムおよびその方法

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Publication number Priority date Publication date Assignee Title
JPS59220687A (ja) * 1983-05-30 1984-12-12 株式会社日立製作所 直接サイクル型軽水原子炉一次冷却系の腐食環境抑制設備
JPS6353497A (ja) * 1986-08-25 1988-03-07 株式会社東芝 気体廃棄物処理装置および方法
JPS63231298A (ja) * 1987-03-19 1988-09-27 株式会社東芝 沸騰水型原子炉の水素注入方法
JPH03107796A (ja) * 1989-09-21 1991-05-08 Toshiba Corp 原子炉炉水注入水素および排ガス系注入酸素の供給方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59220687A (ja) * 1983-05-30 1984-12-12 株式会社日立製作所 直接サイクル型軽水原子炉一次冷却系の腐食環境抑制設備
JPS6353497A (ja) * 1986-08-25 1988-03-07 株式会社東芝 気体廃棄物処理装置および方法
JPS63231298A (ja) * 1987-03-19 1988-09-27 株式会社東芝 沸騰水型原子炉の水素注入方法
JPH03107796A (ja) * 1989-09-21 1991-05-08 Toshiba Corp 原子炉炉水注入水素および排ガス系注入酸素の供給方法

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001349983A (ja) * 2000-06-12 2001-12-21 Toshiba Corp 沸騰水型原子力発電プラントの運転方法
JP2016502102A (ja) * 2012-12-21 2016-01-21 ジーイー−ヒタチ・ニュークリア・エナジー・アメリカズ・エルエルシーＧｅ−Ｈｉｔａｃｈｉ Ｎｕｃｌｅａｒ Ｅｎｅｒｇｙ Ａｍｅｒｉｃａｓ， Ｌｌｃ 沸騰水炉用運転始動／運転停止水素注入システムおよびその方法
US10229761B2 (en) 2012-12-21 2019-03-12 Ge-Hitachi Nuclear Energy Americas Llc Startup/shutdown hydrogen injection system for boiling water reactors (BWRS), and method thereof
JP2020073940A (ja) * 2012-12-21 2020-05-14 ジーイー−ヒタチ・ニュークリア・エナジー・アメリカズ・エルエルシーＧｅ−Ｈｉｔａｃｈｉ Ｎｕｃｌｅａｒ Ｅｎｅｒｇｙ Ａｍｅｒｉｃａｓ， Ｌｌｃ 沸騰水炉用運転始動／運転停止水素注入システムおよびその方法
US10964436B2 (en) 2012-12-21 2021-03-30 Ge-Hitachi Nuclear Energy Americas Llc System for hydrogen injection for boiling water reactors (BWRs) during startup / shutdown
JP2022125296A (ja) * 2012-12-21 2022-08-26 ジーイー－ヒタチ・ニュークリア・エナジー・アメリカズ・エルエルシー 沸騰水炉用運転始動／運転停止水素注入システムおよびその方法

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