BWR plants with low shutdown radiation level. Design and construction of plants and current experience with occupational exposure of plants.:Design and Construction of Plants and Current Experience with Occupational Exposure of Plants
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概要
- 論文の詳細を見る
Occupational exposure during BWR refueling and annual maintenance periods is determined by radioactive corrosion products, such as <SUP>60</SUP>Co and <SUP>58</SUP>Co deposited on major components and piping of the primary cooling system.<BR>The authors have investigated behavior of radioactive corrosion products, e.g. generation, activation and deposition processes, in the primary cooling system, and then expressed the findings as mathematical equations. These provide corrosion product simulation models to predict the amounts of radioactive corrosion products depositing on components and piping.<BR>The effects of corrosion product reduction procedures on shutdown dose rate were evaluated using the model. The procedures were incorporated into the Japanese Improvement and Standardization Program. Improvements of operational procedures to control water chemistry, such as Ni/Fe ratio, as well as application of hardware improvements resulted in an extremely low occupational exposure of less than 90 man•rem/yr for currently constructed BWR plants.
- 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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UCHIDA Shunsuke
Energy Research Laboratory, Hitachi, Ltd.
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MASUDA Takahisa
Energy System Group, Toshiba Corp.
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NAGAO Hiroyuki
Nuclear Energy Division, Toshiba Corp.
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MIKI Minoru
Hitachi Works, Hitachi, Ltd.
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OTOHA Keiichi
Nuclear Power Operation and Maintenance Department, Tokyo Electric Power Co.
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