Method for optimizing test cycle of nuclear power plant containment vessel

Abstract

The invention provides a method for optimizing the test cycle of a nuclear power plant containment vessel. The method comprises the following steps: S1. judging whether the history situation of CTT cycle of the test of the nuclear power plant containment vessel is qualified, if so, entering S2, otherwise, judging that the CTT cycle is not suitable for being prolonged; S2. judging whether the nuclear power plant containment vessel is checked to be qualified or not, if so, entering S3., otherwise, correcting; and S3. evaluating the risk after prolonging the CTT cycle of the power plant, judgingwhether the risk evaluation is passed, if so, determining to prolong the CTT cycle, otherwise, judging that the CTT cycle is not suitable fo being prolonged. By utilizing the method, the CTT test cycle can be prolonged, the CTT frequency can be reduced, the CTT risk can be efficiently reduced, overhaul of critical paths can be saved within the service life of a nuclear power unit, at least 120,000,000 degrees power can be generated by thousands and millions of units; at least ten days of overhaul critical path can be saved after the service life of the nuclear power plant is prolonged, 240,000,000 degrees power can be generated by thousands and millions of units, and the economic benefits can be obviously increased.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant safety, in particular to a method for optimizing the containment test period of a nuclear power plant. Background technique [0002] The containment is the third safety barrier of a nuclear power plant, used to enclose radioactive material in the event of an internal or external accident and protect the public from the consequences of the accident. Based on the above safety requirements, the containment vessel must not only have good airtightness to prevent the proliferation of nuclear substances, but also be able to withstand the internal pressure in a nuclear accident. In order to check and confirm this function, several strength tests and sealing tests are carried out during the life of the nuclear power plant. Among them, the containment test (CTT) is an important test that needs to be carried out during the shutdown of the unit. It uses dry air as the pressure medium to fill the ...

AI Technical Summary

Problems solved by technology

For example, according to feedback from the foreign nuclear industry, the air in the containment is very dry during the CTT, and fires are prone to occur, resulting in extremely serious consequences.

Moreover, the cost of a single CTT investment in a nuclear power plant (including equipment costs, labor costs, consumables, etc.)

[0004] However, there is currently no solution for optimizing the CTT cycle

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