OFFICIAL USE ONLY
hazard would not deny it, (even realizing that the doses
from the external gamma radiation are an addition to the
internal exposure).
.
This is based on some reasonable assumptions of (a) 25-50% reduction
of gamma exposure afforded by living a part of each day in normal
family dwellings, (b) washing and/or scrubbing exposed foods, and
(c) excluding areas where relatively little fallout occurred, but into
which may be transported highly contaminated food and/or water.
After
longer periods of time during which the gamma dose rates in an
originally highly contaminated area have decreased to acceptable levels,
it probably would be necessary to evaluate the residual contamination
for the bone seeking radioisotopes, especially strontium-90.
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