Fission Gas Induced Cladding Deformation of LWR Fuel Rods under Reactivity Initiated Accident Conditions.
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- NAKAMURA Takehiko
- Reactivity Accident Laboratory, Department of Reactor Safety Research, Japan Atomic Energy Research Institute
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- SASAJIMA Hideo
- Reactivity Accident Laboratory, Department of Reactor Safety Research, Japan Atomic Energy Research Institute
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- FUKETA Toyoshi
- Reactivity Accident Laboratory, Department of Reactor Safety Research, Japan Atomic Energy Research Institute
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- ISHIJIMA Kiyomi
- Reactivity Accident Laboratory, Department of Reactor Safety Research, Japan Atomic Energy Research Institute
書誌事項
- タイトル別名
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- Fission Gas Induced Cladding Deformatio
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Behavior of irradiated fuel rods under power burst conditions by accidental reactivity insertion in light water reactors (LWRs) has been studied in the Nuclear Safety Research Reactor (NSRR). In the experiments, cladding hoop deformation, which reached up to about 10%, was much larger than that of the fresh rods. The current LWR fuel behavior analysis codes, which only take account of the thermal expansion of the fuel pellets for the deformation calculation, under-predicted the plastic deformation of the cladding to be less than about 1%. Fission gas release during the pulse irradiation tests reached as high as 22% in the NSRR irradiated fuel tests. In order to describe these test results, a model of grain boundary fission gases to cause the cladding deformation has been developed and installed in a fuel behavior simulation code, FRAP-T6. In the model, the over-pressurized gases by the pulse irradiation cause grain boundary separation and stress the cladding during the tests. The model assumes that the gases remain in the fuel during the early part of pulse irradiation and are released to the open volume in the rod after the cladding deformation. The model, in combination with a fuel thermal expansion model, GAPCON, which was validated through fresh fuel tests, reproduces the NSRR test results reasonably well.
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) 33 (12), 924-935, 1996
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
- 1390001204094642944
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- NII論文ID
- 10002075947
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- NII書誌ID
- AA00703720
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- COI
- 1:CAS:528:DyaK2sXpvVKmuw%3D%3D
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- ISSN
- 18811248
- 00223131
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- NDL書誌ID
- 4109556
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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
- NDL
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