Assessment of residual heat removal and containment spray pump performance under air and debris ingesting conditions. [PWR]

Technical Report · Wed Sep 01 04:00:00 EDT 1982

DOI:https://doi.org/10.2172/7093719· OSTI ID:7093719

Kamath, P. S.; Tantillo, T. J.; Swift, W. L.

This report presents an assessment of the performance of Residual Heat Removal (RHR) and Containment Spray (CS) pumps during the recirculation phase of reactor core and containment cooldown following a Loss-of-Coolant Accident (LOCA). The pumped fluid is expected to contain debris such as insulation and may ingest air depending on sump conditions. Findings are based on information collected from the literature and from interviews with pump and seal manufacturers. These findings show that for pumps at normal flow rates operating with sufficient Net Positive Suction Head (NPSH), pump performance degradation is negligible if air ingestion quantities are less than 2% by volume. For air ingestion between 3% and 15% by volume, head degradation depends on individual pump design and operating conditions and for air quantities greater than 15% performance of most pumps will be fully degraded. Also, small quantities of air will increase NPSH requirements for these pumps. For the types and quantities of debris likely to be present in the recirculating fluid, pump performance degradation is expected to be negligible.

• Research Organization: Creare, Inc., Hanover, NH (USA)
• OSTI ID: 7093719
• Report Number(s): NUREG/CR-2792; CREARE/TM-825; ON: DE83900137
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200 -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
ACCIDENTS
CONTAINMENT
CONTAINMENT SPRAY SYSTEMS
CONTAINMENT SYSTEMS
COOLING SYSTEMS
ENERGY SYSTEMS
ENGINEERED SAFETY SYSTEMS
FLUID MECHANICS
HYDRAULICS
HYDRODYNAMICS
LOSS OF COOLANT
MECHANICS
PERFORMANCE TESTING
PUMPS
PWR TYPE REACTORS
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTOR SAFETY
REACTORS
RHR SYSTEMS
SAFETY
TEST FACILITIES
TESTING
WATER COOLED REACTORS
WATER MODERATED REACTORS