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Hazards Associated With the Spillage of Liquefied Natural Gas on Water.

Authors
Burgess-DS; Murphy-JN; Zabetakis-MG
Source
NTIS: PB 196 602 :22 pages
Link
NIOSHTIC No.
10000540
Abstract
An investigation of the hazard of spillage of liquefied natural gas (lng) onto water is described. About 2,000 gallons of lng were consumed in various tests. The initial vaporization rate of lng following spillage was found to be 0.037 Lb ft2 sec; when the spill was confined, this vaporization rate was moderated after about 20 seconds by the growth of an ice layer on the water surface; when the spill was unconfined, a coherent ice floe was not observed and the vaporization rate was essentially time independent. The maximum diameter (in feet) of the spreading lng pool was found to be given by 6.25 W0 1/3, where w0 is the weight of lng in pounds. Downwind of a natural gas source, time-averaged methane concentrations were given in good approximation by standard air pollution equations. However, peak concentrations were as much as twentyfold higher than average, adding an additional factor to the assessment of hazard. The effect of layering by the cold vaporized natural gas was similar to the effect of a temperature inversion on normal gases in the atmosphere. Small-scale explosions were observed on pouring lng onto a water surface; no single explanation seems pertinent to all of the incidents observed.
Publication Date
19700101
Document Type
IH; Report of Investigations
Fiscal Year
1970
NTIS Accession No.
PB-196602
NTIS Price
A03
Identifying No.
RI 7448
NIOSH Division
PRC;
Source Name
NTIS: PB 196 602
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