Experience feedback for potential drainage of the spent fuel storage pool due to the absence of a siphon breaker on its cooling circuit

According to the guidance suggested by WANO operating experience reports, the spent fuel pool cooling systems of French Cattenom nuclear power plant were examined, checked, and it found that there is no siphon breaker opening on its pipeline, which will likely result in the spent fuel pool emptying events. The siphon circuit breaker of French nuclear power plant includes two forms of open or bow pipe, which can restrain the siphon effect to prevent the drainage of the spent fuel pool. The pipe hole of Cattenom nuclear power plant was not constructed according to the design requirements in the spent fuel pool cooling system, which could potentially drain the spent fuel storage pool. The arrangement of the cooling circulating pipeline of the spent fuel pool in China's nuclear power plant is similar to that of the French plant, experience feedback information for China's nuclear power plant are developed. (authors)