Detection of failed coated particles in HTGR fuels by acid leaching.
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概要
- 論文の詳細を見る
By acid leaching of several kinds of irradiated coated particle fuels, uranium- and <SUP>137</SUP>Cs-leaching fractions were measured. These fractions were compared with the surface failure fraction of the coated particles by a visual inspection in the post-irradiation examination. From the measurements it was found that <SUP>137</SUP>Cs was unsuitable as the objective nuclide for acid leaching, because this nuclide escaped from failed coated particles during irradiation or trapped in the graphite grains of the fuel-compact matrix, and therefore, it was difficult to relate the leaching fraction of <SUP>137</SUP>Cs to the failure fraction of the coated particles. Cesium-137 leaching fraction was less than 10% of the uranium fraction. The uranium leaching fraction agreed fairly well with the surface failure fraction. Therefore, uranium is regarded as the suitable objective nuclide for acid leaching. Also, combination of the acid leaching and the surface inspection is an useful method for detection of failed coated particles.
- 一般社団法人 日本原子力学会の論文
著者
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Minato Kazuo
Japan Atomic Energy Research Institute
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IKAWA Katsuichi
Japan Atomic Energy Research Institute
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FUKUDA Kousaku
Japan Atomic Energy Research Institute
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ITOH Tadaharu
Japan Atomic Energy Research Institute
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MATSUSHIMA Hideo
Japan Atomic Energy Research Institute
関連論文
- Diffusion and Evaporation of Fission Products in Coated Fuel Particles
- ICONE11-36070 ADVANCED COATED PARTICLE FUELS : EXPERIENCE OF ZRC-TRISO FUEL DEVELOPMENT AND BEYOND
- Techniques for Quality Inspection of Coated Fuel Particles
- Failure of coated fuel particles during thermal excursion above 2,000.DEG.C.
- Detection of failed coated particles in HTGR fuels by acid leaching.
- Uranium contamination in coating and in matrix material of unirradiated coated particle fuel.