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Title: The development and evaluation of water-mist fire extinguishing systems

Fire protection for underfloor space is primarily provided by Halon 1301 which has proven to be very effective. However, due to the link between halons and the possible depletion of the stratospheric ozone layer, plans have been implemented to eventually phase out Halon 1301 and 1211. In September 1987 the Montreal Protocol concerning chlorofluorocarbons (CFC) and halons was signed by the United States, the European Economic Community, and 23 other nations. The Montreal Protocol calls for freezing halon production at 1986 levels. Because the majority of underfloor fire protection at Lawrence Livermore National Laboratory (LLNL), as well as other Department of Energy (DOE) sites, is either Halon 1301 or sprinklers, some other means of suppression will have to be developed and verified. The potential loss to facilities housing computer or control rooms damaged by underfloor fires can be extreme. These losses would not only include hardware and software replacement costs, but also lost computing and control capability. Here at LLNL technical research in a facility could be severely affected. Recent studies conducted by the Fire Research Discipline of the Special Projects Division have shown that severe fires fueled by cable insulation can develop within as little as a 6-in-high underfloormore » space (even with mechanical ventilation shut off). Studies also show that conventional sprinklers may not be effective in preventing this destruction. Therefore, we are investigating the water-mist fire extinguishing system as an alternative to Halon 1301 and sprinklers.« less
Authors:
;
Publication Date:
OSTI Identifier:
10182811
Report Number(s):
UCRL-ID--118068
ON: DE94019019; TRN: 94:008215
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Aug 1994
Research Org:
California Univ., Livermore, CA (United States). Lawrence Livermore National Lab.
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 54 ENVIRONMENTAL SCIENCES; FIRE EXTINGUISHERS; COMPARATIVE EVALUATIONS; DESIGN; OZONE LAYER; ENVIRONMENTAL IMPACTS; FIRE FIGHTING 420200; 540120; FACILITIES, EQUIPMENT, AND TECHNIQUES; CHEMICALS MONITORING AND TRANSPORT