Application of National Safeguards Instruments for Spent Fuel Verifications to the IAEA Inspections

At a CANDU 600 MW reactor, 16 to 24 fuel bundles are replaced from two or three channels a day. About 5,000 fuel bundles are discharged and stored for six years in a spent fuel storage bay before its transfer to the dry storage (Fig. 2) annually at one unit. It requires for IAEA to update a safeguards scheme to maintain diversion path and equipment to verify the discharge of spent fuels from the core. Korea has developed safeguards instruments and shares with IAEA for spent fuel verification. This paper explains the instruments that Korea developed in order to optimize national inspection in parallel with IAEA safeguards. Korea has provided enhanced safeguards equipment to IAEA as an active measure to ensure the international transparency and credibility of nuclear activities. KINAC developed several equipment for safeguards inspections for national inspection and IAEA safeguards in mind. Three instrument were used especially for spent fuels verification at the spent fuel storage bay at the Wolsong NPP: SCAV, SCAI, and OFPS system.