Safety testing system used for reactor pressure vessel under serious accident condition

Abstract

The invention provides a safety testing system used for a reactor pressure vessel under a serious accident condition. The safety testing system comprises a heater and a containment vessel, wherein a lower end enclosure of the containment vessel is at a suspension state, an overflow tower is arranged below the containment vessel, a spherical end enclosure of the overflow tower is at a suspension state, a reservoir for storing cooling water is arranged below the overflow tower, the lower end enclosure of the whole containment vessel is soaked in the cooling water, the heater is arranged in the containment vessel and is used for evenly heating a melt in the containment vessel at the constant temperature or at the varied temperature, the melt is poured into the containment vessel through a pouring channel at the top part of the containment vessel, the cooling water in the overflow tower is heated and boiled under the action of high temperature of the melt, a boiling tank and a steam flow are formed in the overflow tower, the containment vessel and a pressure device are connected through a pipeline and a valve, a pair of gas supply devices are connected on the pressure device, and the pressures of the gas supply devices are adjusted by the pressure device. According to the safety testing system used for the reactor pressure vessel under the serious accident condition, the failure process of the containment vessel at the high temperature gradient under the serious accident condition is simulated, and the maximum pressure value allowed in the containment vessel is acquired.

Description

technical field [0001] The invention relates to a reactor pressure vessel safety testing system under serious accident conditions, belonging to the technical field of pressure vessel structure safety testing. Background technique [0002] The structural safety of the pressure vessel (also known as 'containment vessel') is of great importance under the severe accident conditions of the core melting, and it is necessary to ensure that the containment vessel maintains structural integrity within the specified time, and the core melt will remain in the pressure vessel. Do not leak it, otherwise it will cause serious damage to the ecological environment and threaten human production and living activities. During the extreme core melting accident, the maximum temperature of the inner surface of the containment may exceed its melting point temperature of 1327°C, resulting in partial melting of the inner wall surface, or even a melt-through. At this time, due to the cooling effect o...

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Problems solved by technology

[0004] In order to solve the above-mentioned deficiencies in the existing reactor pressure vessel safety testing methods, the present invention provides a serious accident tool that can simulate the structural failure process of the pressure vessel under extreme loading conditions and observe multiple parameters when the containment vessel is damaged. Reactor Pressure Vessel Safety Test System

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