Method for quantifying damages of beta-ray to instrument under severe accident in nuclear power plant
A technology for serious accidents, quantitative methods, used in nuclear power generation, power plant safety devices, greenhouse gas reduction, etc.
Active Publication Date: 2019-06-25
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology
[0005] Since the current radiation identification tests at home and abroad are conducted with gamma rays, the consensus reached on how to consider the impact of beta radiation is to quantify it into a certain dose of gamma rays in proportion, but there is no way to quantify it at home and abroad. Coefficient (C k ) conversion related research
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[0033] 1) Calculate the β source strength
[0034] Firstly, the core inventory is calculated, and then, according to the assumption of NUREG-1465, radionuclides are released into the containment in stages, and the radionuclide and β source strength in the containment at different times can be calculated by ORIGEN-S. The calculated source strength is shown in the table below:
[0035]
[0036]
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The invention belongs to the technical field of analysis and identification of nuclear power plants, and concretely relates to a method for quantifying damages of beta-ray to an instrument under a severe accident in a nuclear power plant. The method for quantifying damages of beta-ray to the instrument under the severe accident in the nuclear power plant, used for analyzing and identifying the instrument in the severe accident and being able to guide instrument manufacturers to design the instruments, is provided against deficiencies in the prior art. The method includes the following steps: 1, determining the intensity of a beta-ray source in the severe accident environment; 2, determining an instrument shielding model; and 3, performing massive particle simulation by using a Monte Carlotechnology.
Description
technical field [0001] The invention belongs to the technical field of nuclear power plant accident analysis and identification, and in particular relates to a method for quantifying instrument damage caused by beta rays in severe nuclear power plant accidents. Background technique [0002] The nuclear fission inside the nuclear power plant reactor will excite β and γ rays. Since the electronic components inside the field instrument are very sensitive to radiation, these rays will inevitably cause damage to the field instrument and eventually lead to the failure of the instrument function. According to the relevant safety regulations, the instruments installed in the containment need to carry out the corresponding qualification test or analysis before mass production, so as to prove the ability of the instrument to withstand radiation. [0003] In the benchmark accident, considering that the dose of β-rays released in the accident is not large, and the penetrating ability of...
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Login to View More IPC IPC(8): G21D3/06
CPCY02E30/00
Inventor 朱加良何正熙李小芬苟拓陈智何鹏陈静陈学坤徐涛李红霞
Owner NUCLEAR POWER INSTITUTE OF CHINA