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A study on artificial rare earth (RE˂inf˃2˂/inf˃O˂inf˃3˂/inf˃) based neutron absorber

Title
A study on artificial rare earth (RE˂inf˃2˂/inf˃O˂inf˃3˂/inf˃) based neutron absorber
Author
김종경
Keywords
Artificial rare earth compound; Neutron absorber; Spent fuel storage system; Criticality control; Pyroprocessing technology
Issue Date
2015-07
Publisher
Elsevier
Citation
Applied Radiation and Isotopes, v. 105, Page. 52-59
Abstract
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.
URI
http://www.sciencedirect.com/science/article/pii/S0969804315300890http://hdl.handle.net/20.500.11754/26212
ISSN
0969-8043
DOI
10.1016/j.apradiso.2015.07.008
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > NUCLEAR ENGINEERING(원자력공학과) > Articles
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