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A Summary of JAEA's R&D programs for advanced technologies for nuclear security and safeguards

Bolind, A.; Seya, Michio

This paper reports on the recent progress at JAEA concerning various R&D programs for advanced technologies for the measurement and detection of nuclear material for security and safeguards. These programs are being coordinated through the Integrated Support Center for Nuclear Nonproliferation and Nuclear Security (ISCN). One program is the development of a neutron detector that uses a ZnS ceramic scintillator material instead of He-3 gas. JAEA is preparing to conduct benchmark experiments to compare the performance of an NDA system that uses the new scintillator detectors against the performance of the existing NDA system that uses He-3 detectors. The Nuclear Resonance Fluorescence (NRF) program is developing NRF as an NDA technique to detect and measure nuclear-material isotopes in used fuel assemblies and in melted nuclear fuel debris. The Neutron Resonance Densitometry (NRD) program is similarly developing NRD to measure melted nuclear-fuel debris. This past year, JAEA has conducted several important NRF and NRD experiments, collaborated closely with international partners, and improved the NRF and NRD theories and computer-simulation codes. Lastly, JAEA has collaborated with Los Alamos National Laboratory to test a PNAR + SINRD NDA detector on used nuclear fuel assemblies at Fugen.

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