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M
ller, P.*; Iwamoto, Akira
Nuclear Physics A, 575, p.381 - 411, 1994/00
Times Cited Count：27 Percentile：82.27(Physics, Nuclear)no abstracts in English
Nakayama, Shinsuke; Iwamoto, Osamu
no journal, ,
In molten salt reactors and small modular reactors (SMRs), the use of graphite and CaH
as moderators is being considered, respectively. Thermal neutron scattering law of moderator material has a large influence on the reactor core design. In addition, charged-particle emission reactions such as (n,p) and (n,a) on K-39 in molten salt and on Cu-63 in heat pipes of SMRs can produce nuclides that are problematic for waste management. Therefore, accurate data on thermal neutron scattering laws for graphite and CaH, and charged-particle emission reaction cross sections for K-39 and Cu-63 are important for the core design of these innovative reactors. Based on the above, we have been studying the evaluation method of these data. The progress to date will be presented.
C+p reactionNakayama, Shinsuke; Watanabe, Yukinobu*
no journal, ,
In the effect assessment on healthy cells in particle therapy, the charged particle emission spectra from nuclear reactions on light element (e.g., C, N, O) constituting a living body are important as fundamental data. Unlike medium-heavy nuclei, nuclear reactions on light nuclei can cause particle emission from a discrete state of residual nuclei. The effect of this emission process on the spectra is analyzed using the nuclear reaction code CCONE, taking the C+p reaction as an example. As a result, the reproducibility the experimental proton and alpha-particle emission spectra is largely improved by considering particle emission from discrete states of residual nuclei. This result indicates that it is important to consider particle emission from discrete states of residual nuclei in the calculation of particle emission spectra from nuclear reactions on light nuclei.
Nakayama, Shinsuke; Iwamoto, Osamu
no journal, ,
The use of graphite and hydrogen compounds as moderators has been considered for molten salt reactors and small modular reactors. Scattering of thermal neutrons by moderators has a significant impact on reactor core design. In addition, charged-particle emission reactions on nuclides contained in molten salts and structural materials can produce nuclides that pose a problem for waste management. Therefore, accurate thermal neutron scattering law and charged-particle emission reaction cross section data for the above materials are important for the development of such innovative reactors. Based on the above, these nuclear data were evaluated and compiled as an evaluated nuclear data file in the MEXT Innovative Nuclear Research and Development Program entitled "Development of Nuclear Data Evaluation Framework for Innovative Reactor". The evaluation method of these nuclear data is outlined.
