Development of a three-dimensional transient code for reactivity-initiated events of BWRs (boiling water reactors) - Models and code verifications
A reactivity-initiated event is a design-basis accident for the safety analysis of boiling water reactors. It is defined as a rapid transient of reactor power caused by a reactivity insertion of over $1.0 due to a postulated drop or abnormal withdrawal of the control rod from the core. Strong space-dependent feedback effects are associated with the local power increase due to control rod movement. A realistic treatment of the core status in a transient by a code with a detailed core model is recommended in evaluating this event. A three-dimensional transient code, ARIES, has been developed to meet this need. The code simulates the event with three-dimensional neutronics, coupled with multichannel thermal hydraulics, based on a nonequilibrium separated flow model. The experimental data obtained in reactivity accident tests performed with the SPERT III-E core are used to verify the entire code, including thermal-hydraulic models.
- OSTI ID:
- 6373045
- Report Number(s):
- CONF-900608-; CODEN: TANSA; TRN: 91-008252
- Journal Information:
- Transactions of the American Nuclear Society; (USA), Vol. 61; Conference: American Nuclear Society (ANS) annual meeting, Nashville, TN (USA), 10-14 Jun 1990; ISSN 0003-018X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
BWR TYPE REACTORS
REACTOR KINETICS
REACTOR SAFETY
ROD DROP ACCIDENTS
A CODES
COMPUTER CODES
COMPUTERIZED SIMULATION
EXCURSIONS
HEAT TRANSFER
HYDRAULICS
NEUTRON FLUX
REACTIVITY INSERTIONS
REACTOR PHYSICS
REACTOR SAFETY EXPERIMENTS
SPACE DEPENDENCE
SPERT-3 REACTOR
THREE-DIMENSIONAL CALCULATIONS
TIME DEPENDENCE
VERIFICATION
VOID FRACTION
ACCIDENTS
ENERGY TRANSFER
ENRICHED URANIUM REACTORS
EXPERIMENTAL REACTORS
FLUID MECHANICS
KINETICS
MECHANICS
PHYSICS
RADIATION FLUX
REACTIVITY
REACTOR ACCIDENTS
REACTORS
RESEARCH AND TEST REACTORS
SAFETY
SIMULATION
TANK TYPE REACTORS
THERMAL REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
220900* - Nuclear Reactor Technology- Reactor Safety
210100 - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled