Analysis of uncertainties in CRAC2 calculations [electronic resource] : wet deposition and plume rise
- Oak Ridge, Tenn. : Oak Ridge National Laboratory, 1984. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: 7 : digital, PDF file
- Additional Creators:
- Oak Ridge National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
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- Free-to-read Unrestricted online access
- We have studied the sensitivity of results from the CRAC2 computer code, which predicts health impacts from a reactor-accident scenario, to uncertainties in selected meteorological models and parameters. The sources of uncertainty examined include the models for plume rise and wet deposition and the meteorological bin-sampling procedure. An alternative plume-rise model usually had little effect on predicted health impacts. In an alternative wet-deposition model, the scavenging rate depends only on storm type, rather than on rainfall rate and atmospheric stability class as in the CRAC2 model. Use of the alternative wet-deposition model in meteorological bin-sampling runs decreased predicted mean early injuries by as much as a factor of 2 to 3 and, for large release heights and sensible heat rates, decreased mean early fatalities by nearly an order of magnitude. The bin-sampling procedure in CRAC2 was expanded by dividing each rain bin into four bins that depend on rainfall rate. Use of the modified bin structure in conjunction with the CRAC2 wet-deposition model changed all predicted health impacts by less than a factor of 2. 9 references.
- Published through SciTech Connect., 01/01/1984., "conf-8409169-3", "DE85005361", Society for Risk Analysis annual meeting, Knoxville, TN, USA, 30 Sep 1984., and Kocher, D.C.; Ward, R.C.; Hicks, B.B.; Rao, K.S.; Ku, J.Y.; Hosker, R.P. Jr.
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