Actions for Evaporation and gaseous dispersion of large-scale releases of nitrogen tetroxide

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Evaporation and gaseous dispersion of large-scale releases of nitrogen tetroxide

Author
McRae, T. G.
Published
United States : [publisher not identified], 1984
Springfield, Va.: National Technical Information Service, [approximately 1984]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Goldwire, Jr, H. C. and Koopman, R. P.

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Summary
A series of large-scale spills (3 to 5 m3) of nitrogen tetroxide (N2O/sub 4/) was performed at the Nevada Test Site (NTS) for the Air Force Engineering and Services Laboratory, Environics Division. The purpose of these experiments was to study the evaporation rates and heavy gas dispersion aspects of realistic size releases of N2O/sub 4/, a rocket fuel oxidizer for the Titan II missile system. The Titan II complexes are currently being decommissioned, resulting in an increase in the overland transportation of this toxic material. The normal boiling point for the liquid N2O/sub 4/ is 21/sup 0/C, hence it evaporates rapidly when spilled onto warm soil and quickly dissociates into nitrogen dioxide (NO2) as it mixes with air. The NO2 is highly toxic with an ACGIH threshold limit value 3 parts per million (ppM). The design of the spill facility and the diagnostics are described. Some typical results for one of the spills are presented. The data include the atmospheric boundary layer conditions in effect during the spill, the spill area heat flux and vapor temperature, the vapor flux measured at 25 meters (m) downwind, and the NO2 gas concentration contours at 785 m. A comparison of the measured NO2 concentration and that calculated with the Air Force Ocean Breeze/Dry Gulch (OB/DG) model is discussed. 10 references, 8 figures, 2 tables.
Report Numbers
DE84012267; UCRL-89687; CONF-8405183-1
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: W-7405-ENG-48
OSTI Identifier 6881719
Research organization: Lawrence Livermore National Lab., CA (USA).
View MARC record | catkey: 47341360