Modeling of two-phase flow during bottom reflooding in PWRs. Final report

Technical Report · Wed Oct 01 00:00:00 EDT 1986

OSTI ID:5036602

Ghiaasiaan, S M

Described in this document are models for the thermal-hydraulic analysis of pressurized water reactor bottom reflooding. The solid/flow conservation equations are presented in forms compatible with the Modular Modeling System (MMS). Based on the analytical models, two stand-alone MMS modules were developed. These modules are the stand-alone single power region forced reflood module (XF) and the stand-alone single power region gravity reflood module (XG). The modules were validated against the experiment with satisfactory results. The computer CPU time on the Cyber 77 was about one-fourth of the real reflood duration for the forced reflood module XF. For the gravity reflood module, XG, the computer CPU time was roughly equal to the real reflood duration.

• Research Organization: Science Applications International Corp., Hermosa Beach, CA (USA)
• OSTI ID: 5036602
• Report Number(s): EPRI-NP-4853; ON: TI87920094
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
42 ENGINEERING
PWR TYPE REACTORS
REACTOR CORES
QUENCHING
TWO-PHASE FLOW
FLOW MODELS
ECCS
HEAT TRANSFER
HYDRAULICS
LOSS OF COOLANT
MATHEMATICAL MODELS
REACTOR SAFETY
ACCIDENTS
ENERGY TRANSFER
ENGINEERED SAFETY SYSTEMS
FLUID FLOW
FLUID MECHANICS
MECHANICS
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR PROTECTION SYSTEMS
REACTORS
SAFETY
WATER COOLED REACTORS
WATER MODERATED REACTORS
220900* - Nuclear Reactor Technology- Reactor Safety
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Light-Water Moderated
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420400 - Engineering- Heat Transfer & Fluid Flow