Estimation of I131 Level in Milk (Salt Lake City Milkshed): Cabriolet Event Fired in Summer
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
The attached graph was prepared in order to achieve a rough predictive capability for estimating I131 in milkshed milk for the case of Cabriolet fired under summer conditions (i.e., all cows grazing). The following inputs and assumptions have been used in the preparation of the figure: a) I131 concentrations measured on Palanquin for single cows were halved to approximate milkshed conditions. b) I131 concentrations resulting from complete rainout of Palanquin and Sedan cloud burdens were assumed to be a factor of ten larger than for the case of dry deposition. This roughly corresponds to complete deposit of the clouds, but without 'hot spot' formation. The calculation is roughly confirmed by dry deposition vs. rainout results observed from tower shots. c) Data from tower shots (both dry deposition and rainout) were obtained from A. Tamplin's memo of March 31, 1966 (COVV-33); however, data from only those clouds having a north-easterly trajectory were included. In order to apply tower shot data to a cratering event, it was conservatively assumed that 20% of the I131 produced in a cratering event is present in the cloud, whereas 100% of the I131 from a tower shot is in the cloud. Thus, the I131 concentrations given in COVV-33 were divided by five; to convert the desposition per square meter to concentration in milkshed milk, desposition per square meter was divided by the usual factor of six.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- US Atomic Energy Commission (AEC); USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 1556892
- Report Number(s):
- UCRL-ID--126923
- Country of Publication:
- United States
- Language:
- English
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