AN UPPER BOUND ON THE THRESHOLD CROSSING PROBABILITY FOR SHORT-TIME EXPOSURE DOSAGE WITH IMPLICATIONS FOR THE ASSESSMENT OF HAZARD FROM TOXIC VAPORS

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Authors
  1. Yee, E.
Corporate Authors
Defence Research Establishment Suffield, Ralston ALTA (CAN)
Abstract
An upper bound on the threshold crossing probability of the random dosage field produced by the instantaneous or short-term release of a passive scalar (contaminant) into the turbulent atmospheric boundary layer is obtained. This bound is constructed by developing a model for the nonstationary stochastic process representing the fluctuations in the concentration of the contaminant as observed at some fixed receptor downwind of the source (i.e., the point of release of the scalar). The implications of this bound for the evaluation of the hazard posed by the release of toxic substances into the atmosphere is discussed. Here, it is emphasized that the neglect of fluctuations in the dosage can lead to a significant underestimation of the risk of exposure to the toxic substance. TRUNCATED
Report Number
DRES-M-1260 — Memorandum
Date of publication
15 Mar 1989
Number of Pages
34
DSTKIM No
89-01881
CANDIS No
59807
Format(s):
Electronic Document(PDF)

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