Uniform water solution nuclear reactor nitrogen conversion and feed liquid automatic acid-adding system and method
A nuclear reactor and aqueous solution technology, which is applied in the direction of reactor fuel elements, reactors, nuclear engineering, etc., can solve the problems of increasing processing costs, increasing radioactive gas storage facilities and processing facilities, and the gas cannot be directly discharged into the atmosphere, so as to achieve the effect of acidity stability
Active Publication Date: 2011-05-04
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology
Since the gas circuit contains a lot of inert radioactive gas ( 85 Kr, 133 Xe, etc.) and gaseous iodine (mainly 131 I and 133 1), these gases cannot be directly discharged to the atmosphere, and must be stored for a long time (3 to 6 months) in pressure tanks before discharge, and purified (such as utilizing activated carbon or molecular sieve adsorption under low temperature conditions), which will increase the storage of radioactive gases Facility and processing facilities, additional processing charges
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[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0018] As shown in Figure 1, the homogeneous aqueous solution nuclear reactor nitrogen conversion and feed liquid automatic acid supply system includes a nitrogen converter 5 connected to the reactor gas circuit, and the nitrogen converter 5 is connected to the nitrogen conversion control system 6 and the shower 7 respectively, The shower 7 is connected with the acid supply container 8 , and the acid supply container 8 is connected with the reactor core container 4 . The nitrogen converter 5 is also directly connected with the acid supplement container 8 through a sprayer. The acid supply container 8 is a stainless steel airtight container, and an overflow pipe is provided on the upper part of the acid supply container 8 to communicate with the core container 4 . The water pump 9 and its circulating water circuit and shower constitute the circulating...
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The invention relates to a uniform water solution nuclear reactor nitrogen transformation and feed liquid automatic acid supplying system and an acid supplying method, the system adopts an anti-high-temperature electrode, such as platinum and the like, to transform nitrogen into NO and NO2 through high-voltage discharging, and transforms the NO and the NO2 into HNO3 through cooling by water spraying, then continuously returning the HNO3 to a reactor core vessel through an acid supplying system, through adjusting the concentration of nitrogen in a gas loop, the nitrogen transforming speed can be controlled through the nitrogen transforming device power and the like, and the acid supplying speed can be adjusted through selecting the acid volume of an acid supplying box and the concentration of the HNO3 of original acid solution, the acidity of reactor feed liquid is constantly controlled within 0.2 mol / L or 0.20-0.25 mol / L, the UO2(NO3)2 of the reactor feed liquid is not hydrolyzed and deposited, which guarantees the reactor feed liquid to be uniform and stable and the operation safety of the reactor.
Description
technical field [0001] The invention relates to a reactor operating device, in particular to a homogeneous aqueous solution nuclear reactor nitrogen conversion and feed liquid automatic acid supplement system and acid supplement method. Background technique [0002] Uranyl nitrate (UO 2 (NO 3 ) 2 ) solution is a homogeneous aqueous solution of nuclear fuel. During the operation of a nuclear reactor, due to the effect of radiation, nitric acid (HNO) in the fuel solution 3 ) will decompose to generate nitrogen gas (N 2 ) and oxygen (O 2 ), leading to fuel solution HNO 3 concentration decreases, causing uranyl ions (UO 2 +2 ) hydrolysis precipitation. as UO 2 (NO 3 ) 2 The solution is a homogeneous aqueous solution of nuclear fuel. A nuclear reactor operating at a rated power of 200kW for 24 hours will produce about 720 liters of N 2 Gas, 1800 L O 2 gas (a total of 2520 liters of gas), if the acid is not replenished, the acidity of the core feed liquid will decreas...
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IPC IPC(8): G21C19/28
CPCY02E30/30
Inventor 李茂良李海颖程作用邓启民包崇兴
Owner NUCLEAR POWER INSTITUTE OF CHINA