MELPROG: an integrated model for in-vessel melt progression analysis
The current emphasis on understanding severe accidents in light water reactors has led to the development of detailed systems models. These models are intended to analyze the response of the reactor core and vessel, the reactor coolant system, and the reactor containment. In this paper, one such core and vessel response code, MELPROG, is described. The purpose of MELPROG is to calculate the state of the reactor core and in-vessel environment and the disposition of core materials within the reactor coolant system boundary during a severe accident sequence. MELPROG uses mechanistic modeling of the important physical processes and treats the coupling between various phenomena. The physical processes are logically grouped together to form a module code structure. The first version of MELPROG has been completed and is being tested. A TMLB' accident sequence calculation for the Surry reactor is also presented in this paper. This calculation clearly demonstrates the advanced analysis capabilities of MELPROG. 6 refs., 5 figs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6470628
- Report Number(s):
- SAND-85-2026C; CONF-8510173-7; ON: TI86001753
- Country of Publication:
- United States
- Language:
- English
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