Accession Number : ADA260999


Title :   Alternative Training Agents. Medium Scale Tests Sortie Generation. Volume 3. Phase 3


Descriptive Note : Final rept. Feb-Sep 90,


Corporate Author : NEW MEXICO ENGINEERING RESEARCH INST ALBUQUERQUE


Personal Author(s) : Lee, Michael E ; Nimitz, Johthan S ; Moore, Ted A ; Tapscott, Robert E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a260999.pdf


Report Date : Feb 1992


Pagination or Media Count : 51


Abstract : This effort evaluated medium-scale candidate halon alternatives for use instead of Halon 1211 in firefighter training scenarios. Candidate agents tested included neat HCFC-123, neat HCFC-22, and selected blends containing two components from the set of HCFC-22, -123, -141b, - 142b, and - 152a. Agents were tested progressively on JP-4 fuel fires of 4, 32, and 75 sq ft. Effectiveness was evaluated by measuring quantities and times required for extinguishment. Both neat HCFC- 123 and a blend of HCFC- 123 and - 142b (80:20 by moles) appear attractive as alternative training agents, because their extinguishing behavior simulates that of Halon 1211, and they appear to have acceptable toxicities for outside use with protective gear. On 4-sq ft fires the critical application rates of these two alternative agents are virtually identical to that of Halon 1211; on larger fires the critical application rates are 1.7 to 3 times that of Halon 1211. Plots of fire size versus quantities of agents required for extinguishment gave smooth curves and allowed estimation of the quantities of agents required to extinguish fires of various surface areas. It is recommended that both neat HCFC-123 and a blend of HCFC-123 and -142b (80:20) be tested on 150-sq ft pool fires and 75-sq ft three-dimensional fires in Phase IV of this effort.... Halon, Alternative, Blends, Fire, Training, Extinguishment, JP-4, HCFC.


Descriptors :   *TRAINING , *FIRE FIGHTING , *EXTINGUISHING , *HALOGENATED HYDROCARBONS , SCENARIOS , QUANTITY , TOXICITY , RATES , GEARS , JET PROPULSION , FIRES , PHASE , MIXTURES , SURFACES , FUELS , SCALE


Subject Categories : Humanities and History
      Safety Engineering
      Combustion and Ignition
      Fuels


Distribution Statement : APPROVED FOR PUBLIC RELEASE