Core-power and decay-time limits for disabled automatic-actuation of LOFT ECCS
The Emergency Core Cooling System (ECCS) for the LOFT reactor may need to be disabled for modifications or repairs of hardware or instrumentation or for component testing during periods when the reactor system is hot and pressurized, or it may be desirable to enable the ECCS to be disabled without the necessity of cooling down and depressurizing the reactor. LTR 113-47 has shown that the LOFT ECCS can be safely bypassed or disabled when the total core power does not exceed 25 kW. A modified policy involves disabling the automatic actuation of the LOFT ECCS, but still retaining the manual activation capability. Disabling of the automatic actuation can be safely utilized, without subjecting the fuel cladding to unacceptable temperatures, when the LOFT power decays to 70 kW; this power level permits a maximum delay of 20 minutes following a LOCA for the manual actuation of ECCS.
- Research Organization:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- DOE Contract Number:
- EY-76-C-07-1570
- OSTI ID:
- 6704373
- Report Number(s):
- LTR-113-51; RE-A-78-103; TRN: 78-018039
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
LOFT REACTOR
ECCS
REACTOR OPERATION
AFTER-HEAT
PERFORMANCE
POWER DISTRIBUTION
REACTOR SAFETY
TEMPERATURE GRADIENTS
ENGINEERED SAFETY SYSTEMS
OPERATION
PWR TYPE REACTORS
REACTOR PROTECTION SYSTEMS
REACTORS
RESEARCH AND TEST REACTORS
SAFETY
TANK TYPE REACTORS
TEST REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
220600* - Nuclear Reactor Technology- Research
Test & Experimental Reactors