System for monitoring leaks of liquid from a spent fuel pool

Abstract

A system for detecting leaks of liquid from a spent fuel pool relates to the field of measuring and testing equipment and is intended for monitoring leaks in tanks, primarily in the storage pools of nuclear power plants. In the system for detecting leaks of liquid from a spent fuel pool, the weld seams of the storage pool are additionally provided with a hermetic metallic barrier connected by valved tubes to a pipeline, the two ends of which are connected via a collection valve and a return valve respectively to a leak collection tank equipped with a liquid level sensor. The system for detecting leaks of liquid from a spent fuel pool makes it possible to monitor the leak tightness of the weld seams of a spent fuel pool and to identify weld seams that have lost their leak tightness withoutfirst drying the storage pool, thus raising the radiation safety of storage pools and reducing their repair time.

Description

technical field [0001] The invention belongs to the field of testing technology and aims at monitoring the leakage of storage pools of nuclear power plants. Background technique [0002] It is known that spent nuclear fuel in nuclear power plants is stored in water-filled pools made of welded metal plates. However, the operating practice of nuclear power plants shows that although the leak detection of the stainless steel lining is carried out during the construction of the pool, during operation, radioactive water usually leaks through the weld due to high stress concentration and corrosion in the weld. This water is generally collected in the curled inner bottom located below the spent nuclear fuel storage pool. At this time, the leakage of radioactive water itself should not exist due to its environmental hazards and needs to be eliminated. For this reason, it is necessary to monitor the leakage of radioactive water and determine the weld where the leakage occurs. Howev...

AI Technical Summary

Problems solved by technology

However, this solution has the following disadvantages: the impossibility of accurately finding leaking welds without prior exclusion of radioactivity, the possibility of radioactive water flushing onto the concrete side walls of the storage tank, the necessity of a metal inner bottom , and lower radiation safety

However, such a solution has disadvantages like the other solutions mentioned above: the impossibility of accurately finding leaking welds without prior exclusion of emissivity, the possibility of radioactive water flushing onto the concrete side walls of the storage tank, The need for a metal inner sole, and lower radiation safety

In addition, in all prior art solutions, the uncertainty of the location of the leak in the storage tank increases the maintenance time of the storage tank after removal of the spent nuclear fuel and drying due to the additional time required to locate the leak

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