System transient response to loss of off-site power

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:5890784

Sozer, A

A simultaneous trip of the reactor, main circulation pumps, secondary coolant pumps, and pressurizer pump due to loss of off-site power at the High Flux Isotope Reactor (HFIR) located at the Oak Ridge National Laboratory (ORNL) has been analyzed to estimate available safety margin. A computer model based on the Modular Modeling System code has been used to calculate the transient response of the system. The reactor depressurizes from 482.7 psia down to about 23 psia in about 50 seconds and remains stable thereafter. Available safety margin has been estimated in terms of the incipient boiling heat flux ratio. It is a conservative estimate due to assumed less than available primary and secondary flows and higher than normal depressurization rate. The ratio indicates no incipient boiling conditions at the hot spot. No potential damage to the fuel is likely to occur during this transient. 2 refs., 6 figs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5890784
• Report Number(s): CONF-901228-2; ON: DE91011367
• Resource Relation: Conference: 6. Miami international symposium on heat and mass transfer, Miami, FL (USA), 10-12 Dec 1990
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
22 GENERAL STUDIES OF NUCLEAR REACTORS
HFIR REACTOR
REACTOR ACCIDENTS
H CODES
HEAT TRANSFER
HYDRAULICS
LOSS OF FLOW
OUTAGES
POWER LOSSES
PRESSURE VESSELS
PUMPS
REACTOR SAFETY
TRANSIENTS
ACCIDENTS
COMPUTER CODES
CONTAINERS
ENERGY LOSSES
ENERGY TRANSFER
ENRICHED URANIUM REACTORS
FLUID MECHANICS
IRRADIATION REACTORS
ISOTOPE PRODUCTION REACTORS
LOSSES
MECHANICS
REACTORS
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
SAFETY
TANK TYPE REACTORS
TEST REACTORS
THERMAL REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
220700* - Nuclear Reactor Technology- Plutonium & Isotope Production Reactors
220900 - Nuclear Reactor Technology- Reactor Safety