- Author
-
Gann, R. G.
- Title
- Introduction.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Report
-
NIST SP 890; Volume 1,
November 1995,
789 p.
- Book or Conf
- Fire Suppression System Performance of Alternative Agents in Aircraft Engine and Dry Bay Laboratory Simulations. Volume 1.,
Gann, R. G., Editors,
1-5 p.,
1995
- Keywords
-
fire suppression
|
aircraft engines
|
nacelle fires
|
simulation
|
halon 1301
|
halon alternatives
|
ultraviolet radiation
- Identifiers
- dry bay; knowledge to help differntitate among chemiclas, leading to selection of the optimal currently available option(s) for in-flight fire suppression; fire suppression efficiency; stability during storage; safety following discharge; discharge performance; optimal currently available option
- Abstract
- In a remarkably short period of time, the world has identified, responded to, and ameliorated a new threat to the global climate (WMO, 1995). Following a mechanism first proposed by Rowland and Molina in 1974, chemically stable chlorine-, bromine-, and iodine-containing molecules rise to the stratosphere and are quantitatively photodissociated by ultraviolet radiation. The halogen atoms then catalytically convert ozone (O₃) molecules, whose chemistry shields the earth's surface from excess ultraviolet radiation, into oxygen (O₂) molecules, which have no such filtration effect. The evidence supporting this hypothesis soon became substantial, and the international political community produced a landmark agreement in 1987, the "Montreal Protocol on Substances That Deplete the Ozone Layer". Subsequent international amendments to this and, domestically, the U.S. Clean Air Act of 1990 have led to restrictions on both production and use of identified ozone-depleting substances (ODSs).