Rapid drainage device and method for fuel pool

Abstract

The invention discloses a rapid drainage device and method for a fuel pool. The rapid drainage device for the fuel pool comprises a drainage pipe, a drainage control valve, an air extractor and an air extraction pipe; the first end of the drainage pipe is used for stretching into the fuel pool; the drainage control valve is connected to the second end of the drainage pipe and controls on-off of the drainage pipe or adjusts the drainage flow of the drainage pipe; the air extraction pipe is connected between the second end of the drainage pipe and the air extractor; and the air extractor extracts air in the drainage pipe through the air extraction pipe, water in the fuel pool enters the drainage pipe, and inverted siphon is established. According to the rapid drainage device and method for the fuel pool, the air extractor extracts air in the drainage pipe to form inverted siphon, water in the fuel pool is drained through the siphon effect, rapid online water changing is achieved, air extraction does not need to be conducted beside the fuel pool, the risk that foreign matter is introduced into the fuel pool is avoided, the personnel falling risk and the operation risk in the fuel pool are avoided, and tests such as a PTR system flushing test, a cooling pump performance test and a purification test are smoothly conducted.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant debugging, in particular to a fast draining device for a fuel pool and a fast draining method for a fuel pool used in a nuclear power plant. Background technique [0002] During the commissioning of the EPR unit (Evolutionary power reactors, European advanced pressurized water reactor nuclear power plant) PTR system (Fuel pool cooling and purification system, the fuel pool cooling and purification system), the suspended solids in the fuel pool often exceeded the standard, resulting in frequent Blockage, the problem that the test cannot go on. [0003] In view of the above problems, the existing solution is to use a submersible pump to extract the water from the fuel pool after the water quality in the fuel pool deteriorates, and then re-inject new desalted water into the fuel pool. This method is inefficient and time-consuming, and it takes about 7 days to perform a fuel pool water ch...

AI Technical Summary

Problems solved by technology

This method is inefficient and time-consuming, and it takes about 7 days to perform a fuel pool water change operation; the operation risk is high, the fuel pool is filled with fuel grids, and the lifting of the submersible pump into the fuel pool for pumping water may damage the valuables in the pool Equipment; the drainage performance is unreliable, and the pump often burns during use

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