Abstract
The Korea Advanced Pyroprocess Facility (KAPF) is a conceptual facility for spent PWR fuel management in the Republic of Korea. Its main function is to produce transuranic metal fuel for a sodium-cooled fast reactor by pyroprocessing spent pressurized water reactor fuel, thereby reducing the volume of spent PWR fuel. The facility MUF (Material Unaccounted For) for a given material balance period is the key index used by the IAEA in its quantitative assessment of facility performance with respect to its control of the nuclear materials involved. To investigate whether the safeguards system for the KAPF would meet the IAEA detection goal, the sigma-MUF value was evaluated based on a hypothetical operating scenario. The measurement methods used for the material accounting in a hot cell environment were assumed to have random and systematic uncertainties based on the International Target Value (ITV) 2000 for measurement uncertainties in safeguarding nuclear materials. With the measurement uncertainties of the safeguards approach and sampling procedures, the evaluated sigma-MUF of the KAPF suggests that the designed safeguards approach can meet typical IAEA detection goals for campaigns of one month or less for the KAPF with a 100 MTHM/yr throughput.
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