Constitutive relations in TRAC-PD2. [PWR]

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

OSTI ID:6590720

Rohatgi, U S; Jo, J; Neymotin, L

This report has been prepared at the request of the Analytical Models Branch of USNRC. The report covers different topics such as flow regime maps, entrainment, interfacial heat and mass transfer, interfacial momentum transfer, wall friction and wall heat transfer for drift flux (loop components) and two-fluid formulations (VESSEL module) as they have been documented and coded in TRAC-PD2 (TRAC-PD2, 1981). Most of these models are similar for both types of formulations except for the model of interfacial momentum transfer, which is described separately. Emphasis here is to either provide or refer to a data base for various correlations and, compare the description of the models in the TRAC-PD2 documentation with their implementation in the code to point out any differences between them. Furthermore, some comments based on BNL experience gained in the course of TRAC-PD2 assessment with separate-effects tests have also been provided where possible. This report also highlights the changes made in TRAC-PD2 from the previous version TRAC-P1A (TRAC-P1A, 1979).

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6590720
• Report Number(s): NUREG/CR-3073; BNL-NUREG-51616; ON: DE83007338
• Country of Publication: United States
• Language: English

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