MELCOR simulation of long-term station blackout at Peach Bottom
This paper presents the results from MELCOR (Version 1.8BC) calculations of the Long-Term Station Blackout Accident Sequence, with failure to depressurize the reactor vessel, at the Peach Bottom (BWR Mark I) plant, and presents comparisons with Source Term Code Package (STCP) calculations of the same sequence. This sequence assumes that batteries are available for six hours following loss of all power to the plant. Following battery failure, the reactor coolant system (RCS) inventory is boiled off through the relief valves by continued decay heat generation. This leads to core uncovery, heatup, clad oxidation, core degradation, relocation, and, eventually, vessel failure at high pressure. STCP has calculated the transient out to 13.5 hours after core uncovery. The results include the timing of key events, pressure and temperature response in the reactor vessel and containment, hydrogen production, and the release of source terms to the environment. 12 refs., 23 figs., 3 tabs.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- Sponsoring Organization:
- USNRC
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6340478
- Report Number(s):
- BNL-NUREG-44993; CONF-9010185-18; ON: DE91006348; TRN: 91-002792
- Resource Relation:
- Conference: 18. water reactor safety information meeting, Gaithersburg, MD (USA), 22-24 Oct 1990
- Country of Publication:
- United States
- Language:
- English
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Analysis of Long-Term Station Blackout without automatic depressurization at Peach Bottom using MELCOR (Version 1.8)
Severe accident source term characteristics for selected Peach Bottom sequences predicted by the MELCOR Code
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