Implementation of a nonequilibrium condensation model in RELAP4/MOD7

Conference · Mon Jan 01 04:00:00 EST 1979

OSTI ID:6439678

Fischer, S R; Chow, H; Van Arsdall, G

RALAp, which is used to simulate the thermal hydraulic behavior of light water reactors subjected to various LOCA transients, is based on the assumption of thermodynamic equilibrium between liquid and vapor within fluid volumes. This assumption, while being appropriate for much of a LOCA transient, is not adequate during the ECC accumulator injection phase as determined by comparisons of code calculations with experimental data. To overcome this limitation, a general model to simulate the nonequilibrium phenomena associated with the mixing of subcooled water with saturated steam has been developed and is operational on preliminary versions of RELAP4/MOD7.

• Research Organization: Idaho National Engineering Lab., Idaho Falls (USA)
• DOE Contract Number: EY-76-C-07-1570
• OSTI ID: 6439678
• Report Number(s): CONF-790402-7
• Country of Publication: United States
• Language: English

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