Maximum discharge rate of liquid-vapor mixtures from vessels
A discrepancy exists in theoretical predictions of the two-phase equilibrium discharge rate from pipes attached to vessels. Theory which predicts critical flow data in terms of pipe exit pressure and quality severely overpredicts flow rates in terms of vessel fluid properties. This study shows that the discrepancy is explained by the flow pattern. Due to decompression and flashing as fluid accelerates into the pipe entrance, the maximum discharge rate from a vessel is limited by choking of a homogeneous bubbly mixture. The mixture tends toward a slip flow pattern as it travels through the pipe, finally reaching a different choked condition at the pipe exit.
- Research Organization:
- General Electric Co., San Jose, CA (United States). BWR Projects Dept.
- OSTI ID:
- 7309475
- Report Number(s):
- NEDO-21052; TRN: 77-014497
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
BLOWDOWN
BWR TYPE REACTORS
FLOW RATE
MATHEMATICAL MODELS
PIPES
PRESSURE VESSELS
RUPTURES
TWO-PHASE FLOW
CONTAINERS
FAILURES
FLUID FLOW
REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
220900* - Nuclear Reactor Technology- Reactor Safety
210100 - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
BLOWDOWN
BWR TYPE REACTORS
FLOW RATE
MATHEMATICAL MODELS
PIPES
PRESSURE VESSELS
RUPTURES
TWO-PHASE FLOW
CONTAINERS
FAILURES
FLUID FLOW
REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
220900* - Nuclear Reactor Technology- Reactor Safety
210100 - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled