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The standard procedure of fire modeling was reviewed to minimize the user dependence, based on the NUREG-1934 and 1824 reports. The hazard analysis of lubricating oil fires in the air compressor room of domestic nuclear power plant (NPP) was also performed using a representative fire model, FDS (Fire Dynamics Simulator). The area ( ) and location of fire source were considered as major parameters for the realistic fire scenarios. As a result, the maximum probability to exceed the thermal damage criteria of IEEE-383 unqualified electrical cables was predicted as approximately 70% with =1 m . It was also found that for qualified electrical cables, the maximum probabilities of exceeding the criteria were 2% and 90% with =2 and 4 m , respectively. It was concluded that all electrical cables should be replaced with IEEE-383 qualified cables and the dike to restrict as  ≤ should be installed at the same time, in order to assure the thermal stability of electrical cables for lubricating oil fires in the air compressor room of domestic NPP.

Application of FDS for the Hazard Analysis of Lubricating Oil Fires in the Air Compressor Room of Domestic Nuclear Power Plant