publication . Article . 2017

The Prediction of Transient Fission-Gas Release and Fuel Microcracking Under Severe Core-Accident Conditions

J. Rest;
  • Published: 11 Aug 2017 Journal: Nuclear Technology, volume 56, pages 553-564 (issn: 0029-5450, eissn: 1943-7471, Copyright policy)
  • Publisher: Informa UK Limited
The interrelationship between fuel fracturing (microcracking), temperature scenario, and fission-gas-bubble response is investigated. The fission-gas-bubble behavior is described using the FASTGRASS computer code. A model, based on the work of DiMelfi and Deitrich describing ductile/brittle fuel behavior, has been incorporated into the FASTGRASS analysis. The predictions of fission-gas release, radial distribution of released gas, radial distribution of microcracking, and fuel temperatures are compared with the results of transient direct-electrical-heating experiments on irradiated light water reactor fuel. Finally, results of analyses for Three Mile Island Uni...
arXiv: Physics::Geophysics
free text keywords: Nuclear and High Energy Physics, Nuclear Energy and Engineering, Condensed Matter Physics, Ductility, Fracture mechanics, Fission products, Fission, Light-water reactor, Nuclear chemistry, Radioactive waste, Materials science, Fuel element failure, Nuclear engineering, Brittleness
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