This report describes the effort to identify, test, and assess a system to extinguish fires using a technology that does not require a halocarbon extinguishing agent. Recently, two alternative technologies--water mist system (WMS) fire suppression technologies and low-residue particulate (LRP)--have come to the attention of researchers. These technologies allow the use of water or dry chemicals in reduced quantities to provide acceptable fire protection. The project reviewed the technologies of WMSs and low-residue particulate systems with regard to fire protection. The state-of-the art was evaluated in view of the current technology and the potential for near-term improvements. Based upon the results of the information search and the assessment of the state-of-the-art for water mist fire suppression systems (WMs) and LRPs, WMS was recommended as the most promising near-term technology for evaluation of this experimental program. The experimental program was to define and optimize the operating parameters for a WMS at laboratory scale, followed by system development studies, and room-scale testing. Based upon the success of this effort, the final project task was an engineering design and cost comparison of WMSs with respect to the equivalent as halon system.

Cover title. At head of title: Technology Support Center Issue.