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Apr 19 – 22, 2022
Vienna, Austria
Europe/Vienna timezone
FR22 starts in Vienna 19 - 22 April 2022 Online Stream:

Impact of Cladding Material on Neutronic Balance in Breed-and-Burn fast reactors

Apr 20, 2022, 10:40 AM
Vienna, Austria

Vienna, Austria

POSTER Track 4. Fast Reactor Materials (Coolants, Structures) and Components Poster Session


Toru Obara (Tokyo Institute of Technology)


Breed and Burn fast reactors are very attractive reactor concept. It can achieve very high burnup without reprocessing facility using depleted uranium or natural uranium as the fuel for the reactor. To achieve criticality in the equilibrium burnup condition improvement of neutron economy is the essential issue. The feasibility of the reactor can be discussed based on the neutron balance of a fuel assembly from the loading to the discharge. There is a possibility that cladding materials give a lot of impact on the neutron balance. The purpose of study was to make clear the impact of cladding material on the neutron balance. In the previous study, HT-9 and ODS were assumed as the cladding material. The thickness was decided based on an example of previous fuel design. In the study, the impact of cladding material on the neutron balance was analyzed by changing the cladding material and the thickness. The analysis results showed the difference of neutron balance between HT-9 and ODS is negligible. Significant improvement of neutron balance can be expected by the reduction of thickness of cladding, which gives the same effect by the reduction of the density of cladding material. The change of burnup characteristics in whole core analysis was discussed also by the change of density of cladding.

Speaker's email address
Speaker's title Mr
Affiliation/Organization Tokyo Institute of Technology
Country/Int. organization Japan

Primary authors

Toru Obara (Tokyo Institute of Technology) Odmaa Sambuu (Nuclear Research Center and School of Engineering and Applied Sciences, National University of Mongolia) Dr Khanh HOANG Van (Institute for Nuclear Science and Technology, Vietnam Atomic Energy Institute) Dr Jun Nishiyama (Tokyo Institute of Technology)

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