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Report No.
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Feasibility study for transmutation system using lead-bismuth cooled accelerator-driven system

Tsujimoto, Kazufumi ; Nishihara, Kenji ; Takei, Hayanori ; Sugawara, Takanori  ; Kurata, Yuji; Saito, Shigeru  ; Obayashi, Hironari ; Sasa, Toshinobu  ; Kikuchi, Kenji*; Tezuka, Masao; Oigawa, Hiroyuki 

The design of an accelerator-driven system was modified and its feasibility was investigated on the basis of new data and knowledge for corrosion by lead-bismuth eutectic and irradiation behavior of candidate materials. The neutronics and thermal design was carried out and a modified core concept was established. As a result of evaluation for the integrity of fuel cladding tubes and a beam window, it was confirmed that their structural strength was sufficient under the conditions of design temperature and corrosion environment without irradiation. Though irradiation effects on material properties were considered not to be so serious under the practical conditions of the ADS according to existing irradiation data, it was needed to accumulate further experimental data for more detailed evaluation. According to level-1 PSA and dynamic analysis of beyond-design-basis accidents, it was shown that there was little possibility of core disruption and re-criticality accidents for ADS.

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