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Nuclear Criticality Safety
NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
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Fusion Science and Technology
Latest News
Securing the advanced reactor fleet
Physical protection accounts for a significant portion of a nuclear power plant’s operational costs. As the U.S. moves toward smaller and safer advanced reactors, similar protection strategies could prove cost prohibitive. For tomorrow’s small modular reactors and microreactors, security costs must remain appropriate to the size of the reactor for economical operation.
Izumi Murakami, Daiji Kato, Masatoshi Kato, Hiroyuki A. Sakaue
Fusion Science and Technology | Volume 63 | Number 3 | May 2013 | Pages 400-405
Technical Paper | Selected papers from IAEA-NFRI Technical Meeting on Data Evaluation for Atomic, Molecular and Plasma-Material Interaction Processes in Fusion, September 4-7, 2012, Daejeon, Republic of Korea | doi.org/10.13182/FST13-A16448
Articles are hosted by Taylor and Francis Online.
We have constructed and opened atomic and molecular (AM) numerical databases for collision processes important for fusion research. Our databases are accessible through the Internet; the data are retrievable and are displayed as a table or a graph. The databases have been used for data evaluation. Critical assessments of AM data have been carried out since 1978 for electron impact ionization and excitation cross sections, rate coefficients, and charge-transfer cross sections of atom-ion collisions, for helium, carbon, oxygen, etc. Evaluated data are fitted to analytic formulas that have physically correct asymptotic behavior. As another type of evaluation, recommended data sets were selected for electron impact excitation rate coefficients of Fe atoms and ions. Because a large amount of data exists, recommended data are not fitted to analytic formulas, but all data are available as electronic files via the Internet. In addition to AM data, physical sputtering yields and backscattering coefficients are also stored as databases, and empirical formulas have been obtained since the 1980s. All evaluated data are published as research reports of the Institute for Plasma Physics of Nagoya University and the National Institute for Fusion Science of Japan. It is important to establish a systematic way for data evaluation by international collaborations to develop an evaluated AM database required for fusion research.