For the problem of leak of stainless steel overlay in fuel transfer tank of a nuclear power plant in China

the liquid penetration test

vacuum foaming method

layered water test

reverse osmosis method and helium leak detection method are used to find the leak point successfully. Helium leak detection method successfully locates the leak point once

and the causes of missed inspection of liquid penetrant inspection

water-bearing test and reverse osmosis method are analyzed. Combining the principle features of various methods

the advantages and disadvantages of various methods are compared and analyzed

and the notes for use are given. The fuel transfer pool leak detection has the characteristics of large inspection scope

high radiation dose

limited working time

and need to locate leak point as soon as possible

an effective workflow for leak detection of stainless steel overlay in fuel transfer tanks is proposed

which provides reference for leak detection work of similar structures such as spent fuel pool

reactor pool and internal component pool.