To submit a request, click below on the link of the version you wish to order. Rules for end-users are available here.
| Program name | Package id | Status | Status date |
|---|---|---|---|
| CONTEMPT4/MOD6 | NESC0818/07 | Arrived | 19-JUN-2002 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| NESC0818/07 | CRAY 1 |
CONTEMPT-4/MOD5 describes the response of multicompartment containment systems subjected to postulated loss-of-coolant accident (LOCA) conditions. The program 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. To accommodate degraded core type accidents, analytical models for hydrogen combustion within compartments and energy transfer due to gas radiation are also provided.
CONTEMPT4/MOD6 is an update of previous CONTEMPT4 versions. Improvements in CONTEMPT4/MOD6 over CONTEMPT4/MOD3 include coding of a BWR pressure suppression system model, a hydrogen/carbon monoxide burn model, a gas radiation heat transfer model, a user specified variable junction (leakage) area as a function of pressure or time, additional heat transfer coefficient options for heat structures, generalized initial compartment conditions for inerted containment, an alternative containment spray model and spray carry-over capability. Also, the thermodynamic properties rountines have been extended to accomodate the higher temperature and multicomponent gas mixtures associated with combustion. In addition, reduced running time is achieved by incorporation of an optional implicit numerical algorithm for junction flow. This makes economically feasible the analysis of very long term transients such as are encountered during degraded core accidents with hydrogen combustion. The user has the option of turning off the implicit routine through user input, if desired.
Containment thermodynamic conditions of hydrogen/air/steam/liquid water mixtures are determined by using modularized equation-of-state subroutines and tabulated water properties. The numerics in the code are completely explicit except for the predictor-corrector technique used to estimate the heat structure effects on compartment conditions, an implicit calculation of junction flow with inertia, and an optional implicit routine for junction flow calculation approaching pressure equilibrium.
Maxima of
999 lumped parameter compartments
99 heat conducting structures using a variety of heat transfer
options and boundary conditions.
Intercompartment flow junctions may be calculated for either a sharp-edge orifice (single phase homogeneous or two-phase flow) or a nozzle (vapor flow only). Containment cooling spray analytical models are provided for either single or double heat exchangers.
The CONTEMP-4/MOD5 code is the most recent in the CONTEMPT series of programs originally developed at EG>G Idaho, Inc. While it does not replace CONTEMPT-LT/028 (NESC 433), CONTEMPT4/MOD5 can perform simplified boiling water reactor (BWR) containment studies. CONTEMPT4/MOD5 is an improvement to CONTEMPT4/MOD4 for ice containment analysis. STH20G generates the water properties library used by CONTEMPT4, and PLOTCT44 plots the values of variables calculated by CONTEMPT4. PLOTCT44 is not available in the IBM version.
60,000 (octal) words of small core memory (SCM) and 220,000 (octal) words of large core memory (LCM) are required on a CDC CYBER176. 160,000 (octal) words of SCM are required on a CDC CYBER170/875. CalComp or FR80 plotting devices are needed for graphical output. 1150K bytes of memory are required on an IBM4331.
Keywords: BWR reactors, accidents, containment, energy transfer, ice condensers, mass transfer, pressure, pwr reactors, reactor safety, temperature distribution.
