Application of Spent Fuel Attribute Tester(SFAT) in National Safeguards Inspection

Since 1997, the SSAC of ROK has started the National Safeguards Inspection for Nuclear Facilities including NPP(Nuclear Power Plant) to verify whether the nuclear material was diverted. In terms of National Safeguards Inspection, it is important to improve the abilities of confirmation whether nuclear material is true or not. There are several ways to check the nuclear material. The most popular method is the NDA(Non- Destructive Analysis) measurement. In these measurements, Gamma ray detection methods are dominantly used. Already, many scientists and technicians are using the special detectors to catch the gamma ray. The CdZnTe detector is one of the powerful detectors to catch the Gamma ray. The IAEA is using the CdZnTe detector to verify the nuclear material in NPP, especially verification of low burn-up spent fuel in storage pool. The KINAC(Korea Institute of Nuclear nonproliferation and control) who is the official body for safeguards inspection in ROK is trying to develop and secure the new inspection equipment for National Inspection. The SSAC(State System of Accounting for and Control of Nuclear Material) in ROK and IAEA is using many inspection equipment under the cooperation from 1970's. In 2008, The KINAC want to use the SFAT, which is the inspection equipment for LWR. From August of 2008, The Integrated Safeguards system was entered into ROK. The SSAC should strengthen the National Inspection system. So, The SSAC decided to use IAEA equipment for verification of the Low burn-up spent fuel