Cooling and purifying system for spent fuel of small reactor

Abstract

The invention discloses a cooling and purifying system for spent fuel of a small reactor. Water is taken from a suppression pool by a cooling and purifying loop and sent into a safety injection watertank, the spent fuel is stored in the safety injection water tank, water in the safety injection water tank is cooled by the cooling and purifying loop, waste heat of the spent fuel is taken out, andmeanwhile, cooled water in the safety injection water tank is purified by the cooling and purifying loop; the spent fuel stored in the safety injection water tank is moved out, and water in the safetyinjection water tank is extracted into the suppression pool by the cooling and purifying loop. With application of the cooling and purifying system for the spent fuel of the small reactor, the problem about water source supplement caused by the fact that the spent fuel is stored by the safety injection water tank can be solved, a sufficient water source is provided for spent fuel cooling, and thecooling requirement of the spent fuel during refuelling of the small reactor is met; water purification function of the safety injection water tank for storing the spent fuel temporarily during refuelling of the small reactor is realized; the system is reasonable in structural design, safe, reliable and easy to repair and maintain.

Description

technical field [0001] The invention relates to the field of nuclear power, in particular to a small reactor spent fuel cooling and purification system. Background technique [0002] When the reactor is refueled, the replaced spent fuel needs to be cooled to remove waste heat. Spent fuel is generally stored in spent fuel pools for cooling, but in small reactors, considering the compact design and the small amount of spent fuel per refueling, the design method of spent fuel pools is no longer applicable. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a spent fuel cooling and purification system for small-scale reactors, which can solve the problem of water supply caused by using safety injection water tanks to store spent fuels, provide sufficient water sources for spent fuel cooling, and meet the needs of small-scale reactors. Cooling requirements for spent fuel during refueling; realize the water purification ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a spent fuel cooling and purification system for small-scale reactors, which can solve the problem of water supply caused by using safety injection water tanks to store spent fuels, provide sufficient water sources for spent fuel cooling, and meet the needs of small-scale reactors. Cooling requirements for spent fuel during refueling; realize the water purification function of the safe injection water tank for temporary storage of spent fuel during small-scale refueling; reasonable structural design, safe and reliable, and easy to repair and maintain

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