Design of water purification system for Tehran research reactor spent nuclear fuels storage pool (wet storage)

Spent Nuclear Fuels Storage (SNFS) is an essential auxiliary facility in nuclear reactors. Following discharge from a nuclear reactor, spent nuclear fuels have to be stored in water pool of SNFS at the reactor or away from reactor to allow for radioactive decay. The storage pool is filled with demineralized water which serves as moderator, coolant and shielding. To prevent corrosion damage of fuels and other equipment a purification system controls the water quality. In this paper, design of a water purification system for optimal water supply and its chemical parameters in the spent fuels storage pool is presented. The main concern of design is to maintain water purity throughout the storage time.Inlet water to the purification system is provided by the make-up system of Tehran Research Reactor, which has low impurities. The ANSI/ANS-57.7 standard has been used for water purification design.