Light-Water-Reactor Safety Research Program. Quarterly progress report, October-December 1980

Technical Report · Wed Jul 01 00:00:00 EDT 1981

OSTI ID:5384100

Several improvements have been made in the physical models of FASTGRASS and GRASS-SST (Steady-state and Transient Gas-release and Swelling Subroutine). The steady-state and transient gas-release predictions of the two codes are presented and compared for a variety of operating conditions. The effects of temperature, temperature gradient, burnup, grain size, and heating rate on gas release are examined. The importance of including models for microcracking (grain-boundary separation) in a transient analysis is demonstrated. It is concluded that a physically realistic description of transient gas release cannot be formulated without considering this phenomenon.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 5384100
• Report Number(s): NUREG/CR-2251; ANL-81-42; ON: TI85016022
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
REACTOR ACCIDENTS
FISSION PRODUCT RELEASE
REACTOR SAFETY
RESEARCH PROGRAMS
WATER COOLED REACTORS
COMPUTER CODES
FUEL ELEMENTS
TEMPERATURE GRADIENTS
TIME DEPENDENCE
ACCIDENTS
REACTOR COMPONENTS
REACTORS
SAFETY
220900* - Nuclear Reactor Technology- Reactor Safety