Evaluation Method of Gas Leakage Rate from Transportation Casks of Radioactive Materials.
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- ARITOMI Masanori
- Tokyo Institute of Technology
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- LI Ninghau
- Tokyo Institute of Technology
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- NOURA Tsuyoshi
- Transnuclear Ltd.
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- YOKOZEKI Michio
- Transnuclear Ltd.
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- ASANO Ryouji
- Hitachi Zosen Co.
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- NIYOMURA Nagao
- Ocean Cask Lease Ltd.
抄録
A sealing function is essential for transportation casks of radioactive materials in order to prevent radioactive materials from being released into the environment. In the safety analysis report, the release rate of radioactive materials into the environment is evaluated by using the method specified in ANSI N14.5 1977 and 1987. However, there are still problems of the evaluation method specified in ANSI N14.5 as follows: <BR>(1) Gas leakage rate is discontinuous according to flow pattern. <BR>(2) The gas compressibility is not considered for laminar flow. <BR>(3) The units to indicate the gas leakage rate are not universal. <BR>Therefore, in this paper, leakage rates from very narrow capillary tubes and orifices were investigated experimentally using He gas to obtain fundamental data for choked flow, nonchoked free expansion flow and laminar flow with gas expansion. Next, an evaluation method of leakage rate of 10-4 to 0.5 cm3/s was established. A simplified evaluation method was proposed for the leakage rates of 10-4 to 10-2 cm3/s related closely to the sealing performance of the casks. Finally, the points to which attention should be paid for using the correlations specified in ANSI N14.5 were discussed.
収録刊行物
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- Ｊｏｕｒｎａｌ ｏｆ Ｎｕｃｌｅａｒ Ｓｃｉｅｎｃｅ ａｎｄ Ｔｅｃｈｎｏｌｏｇｙ（日本原子力学会英文論文誌）
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Ｊｏｕｒｎａｌ ｏｆ Ｎｕｃｌｅａｒ Ｓｃｉｅｎｃｅ ａｎｄ Ｔｅｃｈｎｏｌｏｇｙ（日本原子力学会英文論文誌） 30 (10), 991-1000, 1993
一般社団法人 日本原子力学会
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詳細情報 詳細情報について
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- CRID
- 1390282679072016640
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- NII論文ID
- 130000825909
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- COI
- 1:CAS:528:DyaK2cXovV2gtA%3D%3D
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- ISSN
- 18811248
- 00223131
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可