「常陽」MK-II遮蔽解析(I)-C

Shielding analyses of JOYO MK-II(I)-C

中尾 昇*; 天田 達雄*; 堀江 淳之助*; 竹内 純*; 半田 博之*; 瀬端 正男*

Nakao, Noboru*; Amada, Tatsuo*; Horie, Junnosuke*; Takeuchi, Jun*; Handa, Hiroyuki*; Sebata, Masao*

Shielding analyses of the JOYO MK-II have been performed in order to confirm the shlding design method for the prototype fast breeder reactor, MONJU, and to obtain theata for estimation of the shielding design margin. The method used here is almost t same as the design method of MONJU. The only difference is the cross-sections thatre generated from the JENDL-2. The calcuational flux distributions have been first tained by a series of the ANISN and DOT calculations, then compared with measurement The primary results obtained in this analysis are as follows: (1) The calculationaresults agreed with the measurement within a factor of 5 in a wide range of the reacr, taking into consideration the effect of fuels in an in-vessel fuel storage rack, e flux-to-reaction rate conversion factors and the effect of the detector guide tuben the measurement. (2) The fuels in the in-vessel fuel rack have a strong effect onast nutron flux levels in the fuel rack, but have a little effect on neutron

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