Reduction of PWR moderator temperature coefficient by gadolinium substitution
Technical Report
·
OSTI ID:5558227
In a PWR, should an anticipated transient without scram (ATWS) follow a loss of feedwater, the resulting pressure transient can be reduced to an acceptable limit by designing the core to have an early-in-cycle-1 moderator temperature coefficient (MTC) which is sufficiently negative. A reduction of 40% in the MTC has been shown to be feasible by augmenting lumped boron burnable absorber with gadolinium burnable absorber (admixed with fuel). Additional benefits obtained are improved power distributions and increased beginning-of-life control rod worth.
- Research Organization:
- Science Applications, Inc., McLean, VA (USA)
- OSTI ID:
- 5558227
- Report Number(s):
- EPRI-NP-2191; ON: DE82902204
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200 -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
ACCIDENTS
ALLOYS
ATWS
BURNABLE POISONS
GADOLINIUM ADDITIONS
GADOLINIUM ALLOYS
MATERIALS
NEUTRON ABSORBERS
NUCLEAR POISONS
PWR TYPE REACTORS
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
REACTIVITY COEFFICIENTS
REACTIVITY WORTHS
REACTOR ACCIDENTS
REACTOR MATERIALS
REACTOR SAFETY
REACTORS
SAFETY
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200 -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
ACCIDENTS
ALLOYS
ATWS
BURNABLE POISONS
GADOLINIUM ADDITIONS
GADOLINIUM ALLOYS
MATERIALS
NEUTRON ABSORBERS
NUCLEAR POISONS
PWR TYPE REACTORS
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
REACTIVITY COEFFICIENTS
REACTIVITY WORTHS
REACTOR ACCIDENTS
REACTOR MATERIALS
REACTOR SAFETY
REACTORS
SAFETY
WATER COOLED REACTORS
WATER MODERATED REACTORS