OECD/NEA PROJECT ON FIRE RISK ANALYSIS - CSNI/PWG5 TASK 97-3 'Fire Risk Analysis, Fire Simulation, Fire Spreading, and Impact of Smoke and Heat on Instrumentation Electronics'

摘要

Fire risk analysis has become an integral part of PSA and the fires have been recognised as one of the major contributors to risk of nuclear power plants. The fire simulation methods which pose an important role in fire risk analysis are still largely questioned because of large uncertainties typically associated with the quantitative estimates of fire risks. The uncertainties embedded in fire risk analysis are of dual nature. On one hand there is a shortage of basic data on fire ignition adn parameters prevailing in fire spreading models, on the other hand there is a lack of knowledge and experimental data on vulnerability of equipment of different sort - electronic, electrical and mechanical. However, not only the aforementioned issues but also the impact of heat and smoke spreading from fires has been recognised important in the three CSNI/SESAR reports recently published. In compliance with the message by SESAR reports, CSNI/PWG5 has set up a Task Group to review the present status and maturity of the fire risk analysis methods used in context of PSA.