| Autor: |
Suzuki, Motoe, Fuketa, Toyoshi, Saitou, Hiroaki |
| Předmět: |
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| Zdroj: |
Nuclear Technology; Sep2006, Vol. 155 Issue 3, p282-292, 11p, 1 Diagram, 2 Charts, 19 Graphs |
| Abstrakt: |
Exploratory analyses were performed by the RANNS code for simulated tests of the reactivity-initiated accident with two high-burnup pressurized water reactor rods in the Nuclear Safety Research Reactor (NSRR). The code performs thermal and finite element mechanical calculations in an axis-symmetrical cylinder geometry. On the basis of the irradiation-induced rod conditions including bonding, the code analyzed a strong pellet-clad mechanical interaction process that would often lead to low strain split failure. The predicted quantities such as temperature and stress strain of cladding were discussed and compared with the experimental observations. The calculated cladding permanent strain has a reasonable agreement with postirradiation examination data. The process from crack initiation to final split failure was accounted for by the plastic strain occurrence in the cladding. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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