Download e-book for kindle: Biology of Radioiodine. Proceedings of the Hanford Symposium by L. K. Bustad

By L. K. Bustad

ISBN-10: 1483228908

ISBN-13: 9781483228907

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Additional info for Biology of Radioiodine. Proceedings of the Hanford Symposium on the Biology of Radioiodine

Example text

EISENBUD and M. E. 5 cm/ sec is used it is likely that in dry weather the error will be on the safe side. W h e n I 1 3 1 deposits on foliage, it assumes a state t h a t is still not well understood, b u t it is known t h a t it is difficult to wash off a major fraction of the radioiodine. I t has been shown at Hanford t h a t deposited I 1 3 1 vapor is incor­ porated both by the epidermis a n d the mesophyll. ( 1 7 ) Decontamination trials showed that 61 per cent of the iodine contamination on radish leaves could be washed off with pure water a t 9 days after exposure.

EISENBUD) 131 T H E behavior of I in the environment is a n example of the difficulties one faces in establish­ ing standards of m a x i m u m permissible concen­ trations'(MPG). Although there has now been about 20 years of large scale experience with I 131 , we do not yet have the correct yardsticks with which to estimate the dose that would be received by individuals living in an environ­ ment in which the air or water is contaminated with I 131 . T h e I C R P - N C R P mathematical models for computing the M P G of a radionuclide in air or drinking water (1 > 2) are intended to provide a measure of the acceptability of air and water for breathing and drinking, b u t they do not provide for the possibility that the routes to m a n m a y involve more complicated ecological pathways in which biological concentration of I 1 3 1 occurs.

T h e I C R P - N C R P mathematical models for computing the M P G of a radionuclide in air or drinking water (1 > 2) are intended to provide a measure of the acceptability of air and water for breathing and drinking, b u t they do not provide for the possibility that the routes to m a n m a y involve more complicated ecological pathways in which biological concentration of I 1 3 1 occurs. I t m a y be of interest to note that the sub­ tleties of the behavior of potentially hazardous trace elements in food chains was illustrated here in the Northwest early in World W a r I I by experience with the stable form of another halo­ gen, fluorine, certain compounds of which were used in the electrolytic reduction of a l u m i n u m from the mineral bauxite.

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Biology of Radioiodine. Proceedings of the Hanford Symposium on the Biology of Radioiodine by L. K. Bustad


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