Review of solution approach, methods, and recent results of the TRAC-PF1 system code

Conference · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6547428

Mahaffy, J H; Liles, D R; Knight, T D

The current version of the Transient Reactor Analysis Code (TRAC-PF1) was created to improve on the capabilities of its predecessor (TRAC-PD2) for analyzing slow reactor transients such as small-break loss-of-coolant accidents. TRAC-PF1 continues to use a semi-implicit finite-difference method for modeling three-dimensional flows in the reactor vessel. However, it contains a new stability-enhancing two-step (SETS) finite-difference tecnique for one-dimensional flow calculations. This method is not restricted by a material Courant stability condition, allowing much larger time-step sizes during slow transients than would a semi-implicit method. These have been successfully applied to the analysis of a variety of experiments and hypothetical plant transients covering a full range of two-phase flow regimes.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6547428
• Report Number(s): LA-UR-82-3572; CONF-830304-11; ON: DE83004736
• Country of Publication: United States
• Language: English

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