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Title: Quarterly technical progress report on water reactor safety programs sponsored by the Nuclear Regulatory Commission's Division of Reactor Safety Research, October--December 1978

Technical Report ·
OSTI ID:6221960

Water reactor research performed by EG and G Idaho, Inc., during October--December 1978 is reported. The first small-break experiment was successfully performed in the Semiscale Mod-3 test system, and unusual fluid mass depletion that occurred in the Mod-3 system downcomer during earlier testing was investigated. The LOFT Experimental Program successfully completed the first nuclear loss-of-coolant experiment in the LOFT facility; results show that measured fuel rod cladding temperatures (789 K maximum) were much lower than had been calculated. The Thermal Fuels Behavior Program completed two reactivity initiated accident tests in the Power Burst Facility and preparation for further testing (including a new test series on operational transients). An analysis of two-dimensional temperature distributions in fuel rods was also completed. The Code Development and Analysis Program completed and released the BEACON/MOD2A containment code and the FRAPCON-1 fuel rod steady state analysis code; progress is reported in development of reference code RELAP4 and primary systems code RELAP5. The Code Assessment and Applications Program reports development of the NRC/RSR Data Bank and assessment of the RELAP4/MOD6 and FRAPCON-1 codes. Engineering Support Projects reports completion of an analysis of air--water tests by the 3-D Experiment Project and development of a unique optical probe for viewing multiphase fluid flow phenomena at PWR operating pressure and temperature conditions.

Research Organization:
Idaho National Engineering Lab., Idaho Falls (USA)
DOE Contract Number:
EY-76-C-07-1570
OSTI ID:
6221960
Report Number(s):
NUREG/CR-0512; TREE-1298
Country of Publication:
United States
Language:
English