Fire Risk Scoping Study: Investigation of Nuclear Power Plant Fire Risk, Including Previously Unaddressed Issues.

摘要

An investigation of nuclear power plant fire risk issues raised as a result of the USNRC sponsored Fire Protection Research Program at Sandia National Laboratories has been performed. The specific objectives of the study were: (1) to review fire risk scenarios from four fire probabilistic risk assessments (PRAs) in light of updated data bases; (2) to identify potentially significant fire risk issues that have not been previously addressed and to quantify the potential impact of those issues where possible; and (3) to review current fire regulations and plant implementation practices for relevance to fire risk issues. Six new fire risk issues were identified which had not previously been addressed in a fire risk context. These six issues are (1) control systems interactions, (2) seismic/fire interactions, (3) manual fire fighting effectiveness (including smoke control), (4) total environment equipment survival (including the spurious operation of fire suppression systems), (5) the adequacy of fire barrier qualification methods, and (6) the adequacy of analytical tools for fire.