Chemical state and deposition rate of nickel ion deposit produced on heated surface in high pressure boiling water.
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概要
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Nickel ion deposit was produced on a heated rod surface in high pressure boiling water (150285°C, 0.47.0 MPa). The deposit under the same temperature and pressure conditions as those for BWR reactor water (285°C, 7.0 MPa) was identified as NiO by spectrum profile analysis of the NiLα, NiLβ and 9th-order NiKα1 lines. Deposition rate was obtained from in situ measurements of deposit thickness, by a photoacoustic method, and from chemical analysis of deposit amount. The deposition rate coefficients obtained in temperature and pressure ranges of 150250°C and 0.44.0 MPa were 2×10<SUP>-3</SUP>5×10<SUP>-2</SUP>, which were 0.154.45 times as large as those of iron crud. This was attributed to a dissolution effect of Ni ion from NiO. The deposition rate coefficient at 285°C, 7.0 MPa was estimated to be 4.4×10<SUP>-2</SUP>4.3×10<SUP>-1</SUP>.
- 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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Fujimori Haruo
Energy Research Laboratory Hitachi Lid.
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Asakura Yamato
Energy Research Laboratory Hitachi Ltd.
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Suzuki Kazumichi
Energy Research Laboratory Hitachi Ltd.
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FUJIMORI Haruo
Energy Research Laboratory, Hitachi Ltd.
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