Mechanistic prediction of fission product release under normal and accident conditions: key uncertainties that need better resolution

Conference · Thu Sep 01 00:00:00 EDT 1983

OSTI ID:5532885

Rest, J

A theoretical model has been used for predicting the behavior of fission gas and volatile fission products (VFPs) in UO/sub 2/-base fuels during steady-state and transient conditions. This model represents an attempt to develop an efficient predictive capability for the full range of possible reactor operating conditions. Fission products released from the fuel are assumed to reach the fuel surface by successively diffusing (via atomic and gas-bubble mobility) from the grains to grain faces and then to the grain edges, where the fission products are released through a network of interconnected tunnels of fission-gas induced and fabricated porosity. The model provides for a multi-region calculation and uses only one size class to characterize a distribution of fission gas bubbles.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 5532885
• Report Number(s): CONF-8310144-3-Rev.; ON: DE84003715
• Resource Relation: Conference: Specialists' workshop on fission gas behavior in safety experiments, Cadarache, France, 5 Oct 1983
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
FUEL RODS
FISSION PRODUCT RELEASE
URANIUM DIOXIDE
BURNUP
IODINE 131
IODINE 133
MICROSTRUCTURE
SWELLING
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
ACTINIDE COMPOUNDS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHALCOGENIDES
CRYSTAL STRUCTURE
DAYS LIVING RADIOISOTOPES
FUEL ELEMENTS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
IODINE ISOTOPES
ISOTOPES
NUCLEI
ODD-EVEN NUCLEI
OXIDES
OXYGEN COMPOUNDS
RADIOISOTOPES
REACTOR COMPONENTS
URANIUM COMPOUNDS
URANIUM OXIDES
220300* - Nuclear Reactor Technology- Fuel Elements