BRAVO test.

These data, “together with. appropriate: conversion\factors‘and: living’
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pattern models, provided an estimate of external dose. equivalent.

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Exponentially declining activity concentrations have been observed in sur-

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face soil for 137¢,, 129, and 905, from 1954 to the present on Rongelap

and Utirik Atolls.

Declining-activity concentrations havealso been observed

in vegetation at a rate greater than chat predicted by radioactive:‘decay.

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Thus exponential decline in dietary activity was assumed andthe following

general equat ions were derived.

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