Steam--water mixing and system hydrodynamics program. Quarterly progress report, July--September 1976. [PWR]

Technical Report · Wed Dec 01 04:00:00 EST 1976

OSTI ID:7227156

Cudnik, R A; Flanigan, L J; Carr, J A; Denning, R S; Wooton, R O

Experimental studies are being conducted in 1/15-scale models of a four-loop pressurized water reactor at pressures to 60 psig to extend the understanding of steam-water interaction phenomena and processes associated with a loss-of-coolant accident. A special core barrel was fabricated and installed in the transparent vessel model for the downcomer flow resistance effects studies. This core barrel has 0.5-inch diameter pins attached to the downcomer surface at a center-to-center spacing of 2 inches. The pins span the downcomer gap between the core barrel and pressure vessel walls. Hookup to an existing data acquisition system was completed. Data acquisition at a 5000 channel per second scanning rate and a 50 scan per second per channel data sampling rate is now possible for a maximum of 48 data channels. A data correlation for the 0.59- and 1.0-inch gap width penetration data obtained at BCL has been developed using a modification of the Wallis correlation which removes the dependence on downcomer gap width. A 2/15-scale model of a four-loop pressurized water reactor and its associated equipment have been designed and their construction initiated. The model has a hot walls capability and a 250 psia pressure capability. Facility features include a 100 psia, 30,000 lb/sub m//hr steam flow capability, a 5000 gpm water flow capability, and the capability to conduct ramped steam flow studies.

• Research Organization: Battelle Columbus Labs., OH (USA)
• OSTI ID: 7227156
• Report Number(s): BMI-NUREG-1964
• Country of Publication: United States
• Language: English

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