Nuclear power plant emergency power source power supply test method and system

Abstract

The invention discloses a nuclear power plant emergency power source power supply test method and system, the method is as follows: making a circuit system in the pressure relief state; opening a voltage stabilizer evacuation valve; providing main pump shaft seal water; dismantling a cut-off valve element from a material replacing water tank to a high-pressure safety injection pump inlet; presetting low pressure safety injection pump outlet valve opening degree; in the reactor pressure vessel covered condition, triggering a safety injection signal; starting a low pressure safety injection pump to pressurize a high-pressure safety injection pump to take water from the material replacing water tank to injecting water into a circuit; and due to the dismantling of the cut-off valve element from the material replacing water tank to a high-pressure safety injection pump inlet, flowing water from the low pressure safety injection pump outlet back to a low pressure safety injection pump inlet to form large flow circulation to star an emergency power source power supply test under full load conditions. The beneficial effects are that: the method can be performed without the reactor pressure vessel cover opening condition, and is not limited by test execution windows, other debugging work may not be restricted during the test period, and the debugging working period can be saved.

Description

technical field [0001] The invention relates to the field of nuclear power, more specifically, to a test method and system for an emergency power supply of a nuclear power plant. Background technique [0002] The pressurized water reactor nuclear power plant is mainly composed of three parts: the pressurized water reactor, the primary loop system and the secondary loop system. Nuclear fission takes place in a reactor core made of nuclear fuel inside a pressure vessel. Pressurized water reactors use low-enriched uranium as fuel and light water as the coolant and moderator. The heat released by nuclear fission is taken out of the reactor by the high-pressure water flowing through the primary circuit system in the reactor, and the heat is transferred to the water in the secondary circuit system in the steamer generator. The steam produced by the heated water drives a steam turbine, which drives a generator to generate electricity. [0003] In prior art nuclear power plants, ...

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Problems solved by technology

However, the availability of diesel generators is generally delayed until before the hot test, and the full-load start-up test of the diesel engine in the critical path will be further delayed, resulting in a del

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