Structural material anomaly detection system using water chemistry data. II Prediction model of dose rate around recirculation pipes in iron crud suppressed BWR.:Prediction Model of Dose Rate around Recirculation Pipes in Iron Crud Suppressed BWR
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概要
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A calculation model was developed to predict the dose rate, caused by <SUP>58</SUP>Co which is formed by the activation of <SUP>58</SUP>Ni, around the recirculation pipes in boiling water reactors (BWRs). The model is characterized by considering direct deposition of Ni ion on the nuclear fuel cladding surface and the geometrical contact probability for the ferrite formation reaction between deposited Ni (Co) and Fe<SUB>2</SUB>O<SUB>3</SUB> on fuel cladding surface.<BR>This model showed the important role of the amount of Fe crud on the surface to reduce <SUP>58</SUP>Co ion concentration in the reactor water. And the necessary Fe concentration in the feedwater for reducing the dose rate in the primary system was estimated as a function of the operating time. This model also enables the quantitative predictions of the effect of prefilming treatment of the feedwater heater tubes or another methods to reduce dose rate in an Fe crud suppressed BWR.
- 一般社団法人 日本原子力学会の論文
著者
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Uchida Shunsuke
Energy Research Laboratory Hitachi Ltd.
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Asakura Yamato
Energy Research Laboratory Hitachi Ltd.
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UCHIDA Shunsuke
Energy Research Laboratory, Hitachi, Ltd.
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NAGASE Makoto
Energy Research Laboratory, Hitachi, Ltd.
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SAKAGAMI Masaharu
Energy Research Laboratory, Hitachi, Ltd.
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HUJIMORI Haruo
Energy Research Laboratory, Hitachi, Ltd.
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NAGASE Makoto
Energy Research Laboratory, Hitachi Ltd.
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SAKAGAMI Masaharu
Energy Research Laboratory Hitachi Ltd.
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