CONTEMPT4/MOD4: a multicompartment containment system analysis program

Technical Report · Thu Mar 01 04:00:00 EST 1984

OSTI ID:5120825

Lin, C C; Economos, C; Lehner, J R; Maise, G; Ng, K K

CONTEMPT4/MOD4 is a digital computer program that describes the response of multicompartment containment systems subjected to postulated loss-of-coolant accident (LOCA) conditions. The program is written in FORTRAN IV and can accommodate both pressurized water reactor (PWR) and boiling water reactor (BWR) containment systems. Also, both design basis accident (DBA) and degraded core type LOCA conditions can be analyzed. The program calculates the time variation of compartment pressures, temperatures and mass and energy inventories due to intercompartment mass and energy exchange taking into account user supplied descriptions of compartments, intercompartment junction flow areas, LOCA source terms and user selected problem features. Analytical models available to describe containment systems include models for containment fans and pumps, cooling sprays, heat conducting structures, sump drains, PWR ice condensers and BWR pressure suppression systems. Analytical models for hydrogen combustion within compartments and energy transfer due to gas radiation are also provided. The flexibility needed to more realistically model the complexity of prototypical containments is provided by the multicompartment capability (up to 999 individual compartments) and generalized user oriented input data descriptions. Descriptions of these analytical models are presented, together with input instructions for the CONTEMPT4/MOD4 program and sample problem results.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5120825
• Report Number(s): NUREG/CR-3716; BNL-NUREG-51754; ON: DE84009885
• Country of Publication: United States
• Language: English

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