Nuclear power plant reactor core damage evaluation method

Abstract

The invention provides a nuclear power plant reactor core damage evaluation method. The method comprises the following steps of: in an accident, if a state parameter monitoring system of a power plantis located in an effective healthy state, taking a result obtained through evaluating a reactor core damage by adoption of a temperature at the outlet of a reactor core, a radiation level in a containment, a temperature of a hot section of a main loop, a water level of a pressure container and a response of a source range detector as a reference for damage evaluation; or if the whole power plantis de-energized or the state parameter monitoring system loses efficacy, carrying out monitoring by adoption of an off-site radiation level, and taking a result obtained through evaluating the reactorcore damage by combining a source item inversion technology as the reference for damage evaluation. According to the nuclear power plant reactor core damage evaluation method provided by the invention, an advanced method which is capable of providing round-the-clock effective reactor core damage evaluation under any state of the power plant is created on the basis of a comprehensive and mature reactor core damage evaluation way.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant design, and in particular relates to an advanced nuclear power plant core damage evaluation method. Background technique [0002] After the Fukushima accident, it is one of the important improvement items issued by the Nuclear Safety Administration that nuclear power operating units have core damage assessment methods and capabilities. my country's nuclear safety guide "Emergency Preparedness and Emergency Response for Nuclear Power Plant Operating Organizations" (HAD002 / 01-2010) clearly stipulates that the on-site emergency plan of nuclear power plants should explain the methods and models of core damage assessment. In addition, the "Twelfth Five-Year Plan for Nuclear Safety and Radioactive Pollution Prevention and Long-term Goals for 2020" requires that an expert system for real-time evaluation of core damage status under accident conditions of nuclear power units should be built at ...

AI Technical Summary

Problems solved by technology

However, part of the radioactivity released from the core after the accident may also migrate to the containment pit and the atmosphere, so the method of only using the main circuit coolant sample for evaluation has certain limitations

In addition, post-accident sampling involves complicated operations, and the timeliness of assessment far exceeds the emergency requirements of power plants. Therefore, it is not recommended to use sampling alone to assess core damage, and the results of the assessment can only be used as auxiliary references.

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