Periodic test strategic analysis method of nuclear power plant containment passive hydrogen elimination system

Abstract

The invention belongs to a reactor designing technology, and particularly relates to a periodic test strategic analysis method of a nuclear power plant containment passive hydrogen elimination system. According to the method, various kinds of information such as containment passive hydrogen elimination system equipment information, hydrogen dispersion state in the containment after an accident, personnel exposure dose rate, nuclear power plant practical operating experience feedbacks are taken into overall consideration, and a verification method aimed at the periodic test strategies of the containment passive hydrogen elimination system is innovatively put forward, so that periodic test strategies of the containment passive hydrogen elimination system is determined to be reasonable and scientific, thus guaranteeing that a system function can meet design requirements.

Description

technical field

[0001] The invention belongs to the reactor design technology, and in particular relates to a method for analyzing the periodic test strategy of the containment passive hydrogen elimination system of a nuclear power plant. Background technique

[0002] The containment passive hydrogen elimination system (EUH) is used to reduce the hydrogen concentration in the atmosphere of the containment to below the safe limit under the design basis and beyond the design basis accident conditions, so as to avoid the occurrence of the third disaster caused by the hydrogen explosion. Barrier - Failure of the containment vessel.

[0003] There are two main sources of hydrogen in the containment:

[0004] —In the reactor pressure vessel: the zirconium in the fuel element cladding reacts with water or water vapor to produce hydrogen;

[0005] — Outside the reactor pressure vessel: the core melt in the reactor pressure vessel melts through the lower head of the pressure vessel...

Examples

Embodiment

[0038] Taking the containment passive hydrogen elimination system of a one-million-kilowatt nuclear power plant in China as an example, the specific formulation method of the periodic test strategy is introduced as follows:

[0039] (1) Determine the importance of the passive hydrogen recombiner for mitigating the consequences of accidents through accident analysis and calculation conclusions. In this embodiment, it is determined through calculation that the rooms such as the evaporator room and the pressurizer compartment in the containment have the risk of hydrogen accumulation in severe accidents. Periodic tests require random inspection of the hydrogen recombiners in each evaporator room, pressurizer compartment and other rooms as much as possible to verify that the hydrogen recombiners in these key locations are available.

[0040] (2) According to the principle of random sampling and taking into account the uniformity of sampling, in order to discover potential hydrogen ...

technical field

[0001] The invention belongs to the reactor design technology, and in particular relates to a method for analyzing the periodic test strategy of the containment passive hydrogen elimination system of a nuclear power plant. Background technique

[0002] The containment passive hydrogen elimination system (EUH) is used to reduce the hydrogen concentration in the atmosphere of the containment to below the safe limit under the design basis and beyond the design basis accident conditions, so as to avoid the occurrence of the third disaster caused by the hydrogen explosion. Barrier - Failure of the containment vessel.

[0003] There are two main sources of hydrogen in the containment:

[0004] —In the reactor pressure vessel: the zirconium in the fuel element cladding reacts with water or water vapor to produce hydrogen;

[0005] — Outside the reactor pressure vessel: the core melt in the reactor pressure vessel melts through the lower head of the pressure vessel...

Examples

Embodiment

[0038] Taking the containment passive hydrogen elimination system of a one-million-kilowatt nuclear power plant in China as an example, the specific formulation method of the periodic test strategy is introduced as follows:

[0039] (1) Determine the importance of the passive hydrogen recombiner for mitigating the consequences of accidents through accident analysis and calculation conclusions. In this embodiment, it is determined through calculation that the rooms such as the evaporator room and the pressurizer compartment in the containment have the risk of hydrogen accumulation in severe accidents. Periodic tests require random inspection of the hydrogen recombiners in each evaporator room, pressurizer compartment and other rooms as much as possible to verify that the hydrogen recombiners in these key locations are available.

[0040] (2) According to the principle of random sampling and taking into account the uniformity of sampling, in order to discover potential hydrogen ...

Images