TY - JOUR
T1 - Core concept of simultaneous transmutation of six LLFP nuclides using a fast reactor
AU - Wakabayashi, Toshio
AU - Takahashi, Makoto
AU - Chiba, Satoshi
AU - Takaki, Naoyuki
AU - Tachi, Yoshiaki
AU - Tahara, Yoshihisa
N1 - Funding Information:
We would like to thank A. Hara and Y. Tsuboi from Toshiba Energy Systems & Solutions Corporation for their assistance in carrying out computational simulations, their helpful suggestions and other valuable input. This study comprises the results of “Research and development of an innovative transmutation system of LLFP by fast reactors”, entrusted to the Tokyo Institute of Technology by the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT).
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/10
Y1 - 2019/10
N2 - The core concept of simultaneous transmutation of six long-lived fission products (LLFP: 79Se, 93Zr, 99Tc, 107Pd, 129I, and 135Cs) was investigated using MONJU fast reactor by maintaining all 6 LLFP nuclides support ratios at 1 or greater. By loading the six LLFP nuclides with the partial use of moderator into the blanket, the shield, the axial blanket, a part of gas plenum region and the axial shield, the effective half-lives of the LLFP nuclides were greatly reduced while maintaining the support ratios at 1 or greater. A new transmutation system for the six LLFPs based on a fast reactor core was constructed. It was also found that the basic core characteristics of the LLFP loaded core: the sodium void coefficient, Doppler coefficient and power distribution, did not differ greatly from those of normal conventional fast reactors.
AB - The core concept of simultaneous transmutation of six long-lived fission products (LLFP: 79Se, 93Zr, 99Tc, 107Pd, 129I, and 135Cs) was investigated using MONJU fast reactor by maintaining all 6 LLFP nuclides support ratios at 1 or greater. By loading the six LLFP nuclides with the partial use of moderator into the blanket, the shield, the axial blanket, a part of gas plenum region and the axial shield, the effective half-lives of the LLFP nuclides were greatly reduced while maintaining the support ratios at 1 or greater. A new transmutation system for the six LLFPs based on a fast reactor core was constructed. It was also found that the basic core characteristics of the LLFP loaded core: the sodium void coefficient, Doppler coefficient and power distribution, did not differ greatly from those of normal conventional fast reactors.
KW - Fast reactor
KW - Simultaneous transmutation
KW - Six LLFP nuclides
KW - Support ratio
KW - YD moderator
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U2 - 10.1016/j.nucengdes.2019.110208
DO - 10.1016/j.nucengdes.2019.110208
M3 - Article
AN - SCOPUS:85068875741
SN - 0029-5493
VL - 352
JO - Nuclear Engineering and Design
JF - Nuclear Engineering and Design
M1 - 110208
ER -