Integrity Confirmation Tests and Post-irradiation Test Plan of the HTTR First-Loading Fuel

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概要

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• Since the first-loading fuel of the High Temperature Engineering Test Reactor (HTTR) is the first mass-production High Temperature Gas-cooled Reactor (HTGR) fuel in Japan, their quality should be carefully inspected. For the quality control related to the fabrication process, Japan Atomic Energy Research Institute (JAERI) carried out the tests to certify the fuel integrity during operation. The tests comprise (1) as-fabricated SiC failure fraction measurement, (2) high-temperature heatup test of irradiated fuel and (3) accelerated irradiation test. For (1), the SiC failure fraction was measured independently in JAERI in addition to the measurement in the fabrication process. The measured failure fractions agreed within 95% confidence limit. In order to confirm the integrity of the SiC layer with respect to the 1,600°C criterion, the high-temperature heatup test of irradiated fuel compact was carried out. The result showed that no failed particle was present in the fuel compact after heating. The diffusion coefficient of metallic fission products in SiC layer was also examined in a series of post-irradiation heating tests. The measured diffusion coefficient of 137Cs showed a good holding ability as those obtained for research and development fuel specimen. The measured fission gas release rate in accelerated irradiation test showed no additional failure up to 60 GWd/t which was about two times higher than 33 GWd/t of the maximum burnup in the HTTR core. Through the tests, integrity of as-fabricated first-loading fuel of the HTTR was finally confirmed. The future post-irradiation test plan, which will be carried out to confirm the fuel irradiation performance and to obtain the data on its irradiation characteristics in the core, is also described.

• 社団法人 日本原子力学会の論文
• 2001-06-25

著者

• Saito Takashi

  Department of Child Health, Institute of Clinical Medicine, University of Tsukuba

• Sumita J

  Japan Atomic Energy Res. Inst. Ibaraki

• SUZUKI Shuichi

  Department of Pediatrics, Graduate School of Medicine, Chiba University

• Sawa K

  Japan Atomic Energy Res. Inst. Chiba

• Sawa Kazuhiro

  Department Of Electrical Engineering Faculty Of Engineering Mie University

• Suzuki Shuichi

  Department Of Pediatrics Chiba University Graduate School Of Medicine

• UETA Shouhei

  Department of HTTR Project, Oarai Research Establishment, Japan Atomic Energy Research Institute

• SUMITA Junya

  Department of HTTR Project, Oarai Research Establishment, Japan Atomic Energy Research Institute

• TOBITA Tsutomu

  Department of HTTR Project, Oarai Research Establishment, Japan Atomic Energy Research Institute

• MINATO Kazuo

  Department of Materials Science, Tokai Research Establishment, Japan Atomic Energy Research Institut

• KOYA Toshio

  Department of Hot Laboratories, Tokai Research Establishment, Japan Atomic Energy Research Institute

• SEKINO Hajime

  Department of Hot Laboratories, Tokai Research Establishment, Japan Atomic Energy Research Institute

• Koya Toshio

  Department Of Hot Laboratories Tokai Research Establishment Japan Atomic Energy Research Institute

• Minato Kazuo

  Department Of Materials Science Tokai Research Establishment Japan Atomic Energy Research Institute

• Minato Kazuo

  Department Of Chemistry And Fuel Research Japan Atomic Energy Research Institute

• Ueta S

  Japan Atomic Energy Res. Inst. Ibaraki

• Sekino Hajime

  Department Of Hot Laboratories Tokai Research Establishment Japan Atomic Energy Research Institute

• Tobita Tsutomu

  Department Of Httr Project Oarai Research Establishment Japan Atomic Energy Research Institute

• Tobita Tsutomu

  Department Of Chemistry And Fuel Research Japan Atomic Energy Research Institute

• Suzuki Shuichi

  Department Of Biomedical Chemistry Graduate School Of Medicine The University Of Tokyo

• Suzuki Shuichi

  Department Of Httr Project Oarai Research Establishment Japan Atomic Energy Research Institute

• Saito Takashi

  Department Of Applied Chemistry Faculty Of Engineering Gunma University

• Saito Takashi

  Department Of Agronomy Faculty Of Agriculture Tohoku University

• SAITO Takashi

  Department of JMTR, Oarai Research Establishment, Japan Atomic Energy Research Institute

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