Size distribution of drops from containment spray nozzles. [PWR]

Technical Report · Mon Jan 01 00:00:00 EST 1979

DOI:https://doi.org/10.2172/6323345· OSTI ID:6323345

Powers, T. B.; Reid, D. L.

Typically PWR nuclear reactor containment vessels are equipped with an array of spray nozzles that would be used to decontaminate the vessel atmosphere in the unlikely event of a loss-of-coolant accident (LOCA). Since the decontamination rate is highly dependent upon the spray drop size, knowledge of the size distribution of the drops from a specified nozzle is required for mathematical prediction of washout rates for the radionuclides present in the vessle atmosphere. Spray washout rates for 1713A and 7G3 nozzles were empirically determined in the Containment System Experiments (CSE). The values obtained compared reasonably well with those calculated using the mathematical model. The mass median diameter (MMD) drop sizes of the sprays used for the mathematical prediction were those supplied by the manufacturers which were based on an early photographic method.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE; US Nuclear Regulatory Commission (NRC)
• DOE Contract Number: EY-76-C-06-1830
• OSTI ID: 6323345
• Report Number(s): NUREG/CR-0608; PNL-2840; TRN: 79-008981
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
CONTAINMENT SPRAY SYSTEMS
PERFORMANCE
PWR TYPE REACTORS
COMPARATIVE EVALUATIONS
MATHEMATICAL MODELS
NOZZLES
SPRAYS
CONTAINMENT
CONTAINMENT SYSTEMS
ENGINEERED SAFETY SYSTEMS
REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled