Thermal-hydraulic simulation of natural convection decay heat removal in the High Flux Isotope Reactor using RELAP5 and TEMPEST: Part 1, Models and simulation results
A study was conducted to examine decay heat removal requirements in the High Flux Isotope Reactor (HFIR) following shutdown from 85 MW. The objective of the study was to determine when forced flow through the core could be terminated without causing the fuel to melt. This question is particularly relevant when a station blackout caused by an external event is considered. Analysis of natural circulation in the core, vessel upper plenum, and reactor pool indicates that 12 h of forced flow will permit a safe shutdown with some margin. However, uncertainties in the analysis preclude conclusive proof that 12 h is sufficient. As a result of the study, two seismically qualified diesel generators were installed in HFIR. 9 refs., 4 figs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6511289
- Report Number(s):
- CONF-890173-2; ON: DE89006635
- Resource Relation:
- Conference: RELAPS users seminar, College Station, TX, USA, 31 Jan 1989; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
HFIR REACTOR
AFTER-HEAT REMOVAL
COMPUTERIZED SIMULATION
FLUID FLOW
HEAT TRANSFER
HYDRAULICS
MELTDOWN
R CODES
REACTOR ACCIDENTS
REACTOR SAFETY
T CODES
ACCIDENTS
COMPUTER CODES
ENERGY TRANSFER
ENRICHED URANIUM REACTORS
FLUID MECHANICS
IRRADIATION REACTORS
ISOTOPE PRODUCTION REACTORS
MECHANICS
REACTORS
REMOVAL
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
SAFETY
SIMULATION
TANK TYPE REACTORS
TEST REACTORS
THERMAL REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
220700* - Nuclear Reactor Technology- Plutonium & Isotope Production Reactors
220600 - Nuclear Reactor Technology- Research
Test & Experimental Reactors
220900 - Nuclear Reactor Technology- Reactor Safety