Development of monitoring technique for the confirmation of spent fuel integrity during storage
| Autor: | Yasushi Nauchi, Tetsuo Matsumura, Toshiari Saegusa, Akihiro Sasahara |
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| Rok vydání: | 2008 |
| Předmět: |
Nuclear and High Energy Physics
Engineering Waste management business.industry Mechanical Engineering Inspection method Collimator Rod Spent nuclear fuel law.invention Nuclear Energy and Engineering law General Materials Science Rod defect Safety Risk Reliability and Quality business Waste Management and Disposal Leakage (electronics) |
| Zdroj: | Nuclear Engineering and Design. 238:1260-1263 |
| ISSN: | 0029-5493 |
| DOI: | 10.1016/j.nucengdes.2007.03.042 |
| Popis: | A method is developed to monitor integrity of spent fuels stored in a canister that is sealed by weld. To achieve the monitoring, Kr-85 gas was newly adopted as a kind of probe. In the case of a fuel rod defect, Kr-85 gas of the fuel rod is leaked in the canister. By detection of gamma ray (514 keV) emitted from Kr-85 outside of the canister, defected rods can be detected without unsealing the canister. The monitoring technique was developed using small-scaled mock-up experiments and simulated calculation. The result showed that Kr-85 gas leakage of about 10 11 Bq is detectable under the noise gamma rays by using the detection system with collimator, which is about 10% of Kr-85 inventory in a fuel rod. Therefore, this monitoring technique is considered as an inspection method prior to transportation of spent fuel from an interim storage facility to a reprocessing plant. |
| Databáze: | OpenAIRE |
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