Nuclear power plant steam generator blowdown system waste resin cleaning and uncontrolling method

Abstract

The invention relates to the technical field of radioactive waste management, and particularly discloses a nuclear power plant steam generator blowdown system waste resin cleaning and uncontrolling method, which comprises the following steps: 1, carrying out source item investigation; 2, judging whether radioactivity is abnormal; 3, independently collecting evaluation destinations; 4, sampling andmeasuring gamma nuclide; 5, calculating the number of statistical samples; 6, judging whether the number of samples meets requirements ; 7, calculating the sum of the gamma activity concentrations ofthe samples, and judging whether the sum is less than or equal to 0.01 Bq / g ; 8, measuring <3>H, <14>C and <90>Sr; 9, performing control release evaluation; 10, uncontrolling; and 11, doing not perform uncontrolling. According to the method, the purpose of minimizing the radioactive waste is achieved, the waste disposal cost is reduced, and the influence of the waste on the environment is reduced.

Description

technical field [0001] The invention belongs to the technical field of radioactive waste management, and in particular relates to a method for cleaning and releasing waste resin in a steam generator blowdown system of a nuclear power plant. Background technique [0002] Guo Xiliang of the Chinese Academy of Radiation Protection proposed a basic process for the cleaning and release of slightly radioactively contaminated materials (Guo Xiliang et al., Cleaning and release of slightly radioactively contaminated materials in nuclear power plants, <Radiation Protection>, Vol. 34, No. 2, 2014), Including the source item analysis of contaminated materials, radiation level detection content design, radiation level measurement, application report for cleaning clearance, submission to the regulatory authority for review, implementation of clearance and other steps, see figure 1 . [0003] Wang Ping, Nuclear and Radiation Safety Center, Ministry of Environmental Protection, prop...

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Problems solved by technology

[0004] The above two cleaning and control methods are relatively broad processes, which are not highly targeted. There is no specific process based on the characteristics of the material, that is, the waste resin of the steam generator blowdown system of the nuclear power plant. The process does not form a closed loop, and there is no specific data judgment standard in the process. ; There is no standardized process and cannot be used for on-site implementation

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