A severe accident at a nuclear power plant can lead to core fuel damage with the potential to release contamination and hydrogen (H2). Such a scenario can be initiated by a so-called extended station blackout (SBO) event such as occurred at Fukushima. Subsequent release of H2 into the containment or adjacent buildings can (in the absence of interting) cause a combustible mixture of gases to develop. Containment safety analyses and emergency planning have traditionally addressed this possibility. Furthermore, it is increasingly recognized that the potential threat to structures and personnel can occur for any highly compartmentalized adjacent structures to which the hydrogen can migrate, accumulate and potentially ignite (for example, the auxiliary or reactor building).
Fauske & Associates, LLC (FAI) can perform a complete analysis of a reactor auxiliary building using a unique FAI developed software product (FATETM). FATETM is able to analyze the reactor auxiliary building accident response, including hydrogen distribution and contamination transport, room heatup due to loss of HVAC, and fire and smoke migration. This versatile tool addresses multiple issues that arise during extended SBO events, and can be generally applied in any facility where flammability, combustibility and contamination hazards must be modeled, including non-nuclear power plant facilities such as chemical, refinery and pharmaceutical facilities.
Results can be used to design and optimize monitoring and control systems or to aid development of Severe Accident Management Guidelines (SAMG).