A review is presented of the state of the art of smoke production
measurement, prediction of smoke impact as part of computer-based
fire modeling, and measurement and prediction of the impact of
smoke through deposition of soot on and corrosion of electrical
equipment. The literature review on smoke corrosivity testing and
damage due to smoke deposition emphasizes (despite extensive
research on smoke corrositity) the lack of validated and widely
applicable prescriptive or performance based methods to assure
electrical equipment survivability given exposure to fire smoke.
Circuit bridging via current leakage through deposited smoke was
identified as an important mechanism of electronic and electrical
equipment failure during NPP fires. In the near term, assessment of
potential damage can reasonably be based on the airborne smoke
exposure concentration and, perhaps, the exposure duration. Hence,
models that can predict the airborne smoke concentration would be
sufficient to suit short-term analysis needs. In the longer term,
it would be desirable to develop models that could estimate the
deposition behavior of smoke, as well and specifically correlate
the combination of deposited and airborne smoke to component
damage.
General
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