Calculations of flow oscillations during reflood using RELAP4/MOD6. [BWR; PWR]
Conference
·
OSTI ID:6872133
Flow oscillations between the downcomer and the electrically heated core during reflood have been observed in reflood experimental facilities such as Semiscale and FLECHT-SET (Westinghouse). The purpose of the study described was to investigate the primary mechanism responsible for the initiation and continuation of the oscillations during reflood using the RELAP4/MOD6 code. The study produced significant results concerning the accuracy of RELAP in predicting the dynamic features of density-wave and pressure drop oscillations, and was conducted on the German three-loop PRIMAR KREISLAUF (PLK) Reflood Experimental System. RELAP4/MOD6 is an analytical computer code which can be used for best estimate analysis of PWR or BWR reactor system blowdown and reflood response to a postulated LOCA.
- Research Organization:
- Idaho National Engineering Lab., Idaho Falls (USA)
- DOE Contract Number:
- EY-76-C-07-1570
- OSTI ID:
- 6872133
- Report Number(s):
- CONF-781105-5
- Country of Publication:
- United States
- Language:
- English
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210100 -- Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
210200 -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
ACCIDENTS
BWR TYPE REACTORS
ECCS
ENGINEERED SAFETY SYSTEMS
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LOSS OF COOLANT
OSCILLATIONS
PWR TYPE REACTORS
REACTOR ACCIDENTS
REACTOR PROTECTION SYSTEMS
REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS