Model for stratified flow in a CANDU reactor header manifold
The core of the Canada deuterium uranium (CANDU) reactor consists of many horizontal pressure-tube-type fuel channels each connected by feeder pipes to common inlet and outlet horizontal headers above the core. The feeder nozzle connections at the header are at different elevations around the header circumference. The headers are connected to the steam generators and the emergency-core-cooling (ECC) system. For a small-break loss-of-coolant accident with delayed or unavailable ECC, two-phase (steam-water) coolant is eventually predicted in the inlet header as the primary inventory decreases. The possibility of coolant stratification in the header resulting in steam cooling of the fuel channels with feeder nozzles at the header in the steam phase needs to be studied. Tests are ongoing in the full-scale header facility at Westinghouse Canada to provide experimental information on the header manifold flow behavior. A series of single-phase water and two-phase steam-water, steady-state header injection tests was recently done, and results to data are discussed.
- Research Organization:
- AECL, Sheridan Park, Ontario
- OSTI ID:
- 6818796
- Report Number(s):
- CONF-861102-
- Journal Information:
- Trans. Am. Nucl. Soc.; (United States), Journal Name: Trans. Am. Nucl. Soc.; (United States) Vol. 53; ISSN TANSA
- Country of Publication:
- United States
- Language:
- English
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ACCIDENTS
BOILERS
CANDU TYPE REACTORS
COOLING SYSTEMS
ECCS
ENERGY SYSTEMS
ENERGY TRANSFER
ENGINEERED SAFETY SYSTEMS
FLUID FLOW
FLUID MECHANICS
HEAT TRANSFER
HEAVY WATER MODERATED REACTORS
HYDRAULICS
LOSS OF COOLANT
MECHANICS
PRESSURE TUBE REACTORS
PRIMARY COOLANT CIRCUITS
REACTOR ACCIDENTS
REACTOR CHANNELS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTOR CORES
REACTOR PROTECTION SYSTEMS
REACTOR SAFETY
REACTOR SAFETY EXPERIMENTS
REACTORS
SAFETY
STEAM GENERATORS
STRATIFICATION
THERMAL REACTORS
TWO-PHASE FLOW
VAPOR GENERATORS