Isotopic fission product release from nuclear fuel under severe core damage accident conditions

Conference · Sun Sep 01 04:00:00 EDT 1985

OSTI ID:6402596

Rest, J; Osetek, D J; Hartwell, J K

Isotopic fission gas release behavior during SFD tests 1-1, 1-3, and 1-4 is strongly dependent on the pre-test fuel history. For SFD 1-1, where the majority of all the fission products were generated during the preconditioning period, very little difference in isotopic release behavior between short- and long-lived species is predicted. For the SFD 1-3 and 1-4 tests, where the majority of all short-lived fission gases decayed away during the 4-year cooling period, differences between the behavior of long- and short-lived species are predicted. Most of the intragranular fission product release has been shown to be due to a grain-growth/grain-boundary-sweeping mechanism. In addition, fuel liquefaction/dissolution processes can lead to increased release under these degraded-core-accident conditions. These predictions follow the trend of the observed phenomena.

• Research Organization: Argonne National Lab., IL (USA); EG and G Idaho, Inc., Idaho Falls (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6402596
• Report Number(s): CONF-851019-3; ON: TI86001820
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
ACCIDENTS
COMPUTER CODES
DISSOLUTION
ENERGY SOURCES
F CODES
FISSION PRODUCT RELEASE
FUELS
LIQUEFACTION
MATERIALS
NUCLEAR FUELS
PBF REACTOR
PULSED REACTORS
REACTOR ACCIDENTS
REACTOR MATERIALS
REACTORS
TANK TYPE REACTORS
THERMOCHEMICAL PROCESSES
WATER COOLED REACTORS