Behavior of Coated Fuel Particle of High-Temperature Gas-Cooled Reactor under Reactivity-Initiated Accident Conditions
| Autor: | Kazuhiro Sawa, Fumihisa Nagase, Shohei Ueta, Toyoshi Fuketa, Tomoyuki Sugiyama, Miki Umeda |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Uranium dioxide Nuclear reactor engineering.material law.invention chemistry.chemical_compound Nuclear Energy and Engineering chemistry Coating law Melting point engineering Uranium oxide Particle Deposition (phase transition) Research reactor Composite material Nuclear chemistry |
| Zdroj: | Journal of Nuclear Science and Technology. 47:991-997 |
| ISSN: | 1881-1248 0022-3131 |
| DOI: | 10.1080/18811248.2010.9711663 |
| Popis: | In order to clarify the failure mechanism and determine the failure limit of the High-Temperature Gascooled Reactor (HTGR) fuel under reactivity-initiated accident (RIA) conditions, pulse irradiations were performed with unirradiated coated fuel particles at the Nuclear Safety Research Reactor (NSRR). The energy deposition ranged from 0.578 to 1.869 kJ/gUO2, in the pulse irradiations and the estimated peak temperature at the center of the fuel particle ranged from 1,510 to 3,950 K. Detailed examinations after the pulse irradiations showed that the coated fuel particles failed above 1.40 kJ/gUO2, where the peak fuel temperature reached over the melting point of UO2 fuel. It was concluded that the coated fuel particle was failed by the mechanical interaction between the melted and swelled fuel kernel and the coating layer under RIA conditions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|