TY - JOUR AU - 김종경 DA - 2015/07 PY - 2015 UR - http://www.sciencedirect.com/science/article/pii/S0969804315300890 UR - http://hdl.handle.net/20.500.11754/26212 AB - A new concept of a neutron absorption material (i.e., an artificial rare earth compound) was introduced for criticality control in a spent fuel storage system. In particular, spent nuclear fuels were considered as a potential source of rare earth elements because the nuclear fission of uranium produces a full range of nuclides. It was also found that an artificial rare earth compound (RE˂inf˃2˂/inf˃O˂inf˃3˂/inf˃) as a High-Level Waste (HLW) was naturally extracted from pyroprocessing technology developed for recovering uranium and transuranic elements (TRU) from spent fuels. In this study, various characteristics (e.g., activity, neutron absorption cross-section) were analyzed for validating the application possibility of this waste compound as a neutron absorption material. As a result, the artificial rare earth compound had a higher neutron absorption probability in the entire energy range, and it can be used for maintaining sub-criticality for more than 40 years on the basis of the neutron absorption capability of Boral™. Therefore, this approach is expected to vastly improve the efficiency of radioactive waste management by simultaneously keeping HLW and spent nuclear fuel in a restricted space. PB - Elsevier KW - Artificial rare earth compound KW - Neutron absorber KW - Spent fuel storage system KW - Criticality control KW - Pyroprocessing technology TI - A study on artificial rare earth (RE˂inf˃2˂/inf˃O˂inf˃3˂/inf˃) based neutron absorber VL - 105 DO - 10.1016/j.apradiso.2015.07.008 T2 - Applied Radiation and Isotopes ER -