Inspection and Ageing Evaluation of Refueling Water Storage Tank Bottom in a Nuclear Power Plant

Refueling water storage tank is used to hold radioactive boric acid and could be used for containment cooling under accident condition as well. After long term using, the bottom of refueling water storage tank might be corroded and even leak, which will affect nuclear safety. According to design specification, failure mechanism analysis and failure feedback, inspection and evaluation of the tank bottom in a nuclear power plant were carried out, so that the integrity was ensured and the nuclear safety was obtained.