High-temperature test device and test method for simulating coolant loss process of spent fuel pool

Abstract

The invention relates to a high-temperature test device and a test method for simulating the coolant loss process of a spent fuel pool. The high-temperature test device comprises a container (1), a compensation container (3) and a circulated water collecting device (6), wherein the container (1) is used for containing a heat conduction rod bundle (2); the compensation container (3) is communicated with the bottom of the container (1); the circulated water collecting device (6) is arranged at the upper part of the container (1) and is communicated with the container (1); the lower part of the circulated water collecting device (6) is also communicated with the upper part of the compensation container (3); the outer surfaces of the container (1) and the compensation container (3) are coated with a heat-preservation material; a spraying cooling device (7) is further arranged at the upper part inside the container (1); the compensation container (3) is configured with a plurality of water squeezing rods (8) with different cross section areas. By adopting the high-temperature test device and the test method provided by the invention, simulation on the process of coolant loss, evaporation to dryness, dry burning and spray cooling of the spent fuel pool can be achieved, and moreover, the high-temperature test device is simple in structure, convenient to operate and low in cost and is safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of cooling loss simulation of a spent fuel pool, and in particular relates to a high-temperature test device and a test method for simulating the cooling loss process of a spent fuel pool. Background technique [0002] Nuclear power plant spent fuel pools are used to store spent fuel assemblies discharged from the reactor core and provide cooling functions. After the accident, when the spent fuel pool loses cooling for a long time or leaks water from a breach in the spent fuel pool (referred to as "loss of cooling in the spent fuel pool"), the spent fuel will experience a process of evaporation and exposure, and the temperature of the spent fuel cladding will rise and may be damaged. After the Fukushima nuclear power plant accident in Japan, more attention has been paid to the safety of spent fuel pools. [0003] The spent fuel assemblies stored in the spent fuel pool are unloaded from the core in time and ...

AI Technical Summary

Problems solved by technology

[0005] The existing test device has the following disadvantages: 1) A single container is used to hold the heat-conducting rod bundle, and there is no compensation container connected to the holding container, which cannot simulate different storage states and working conditions of the spent fuel pool; 2) There is no circulating water collection device , when the evaporation test is carried out, the water entrained in the gas-liquid two-phase flow stage in the initial stage cannot return to the holding container, resulting in a large deviation between the test and the simulated working conditions

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