options.
The numerical guidance therein should be reduced by the
factors of 50 percent for individual exposure and 20 percent for
gonadal exposure considering that exposures cannot be precisely
predicted.
The detailed rationale for these reductions is provided
in Appendix III.
The resulting guides for planning cleanup actions
will then be:
Whole body and bone marrow Thyroid -
|
Bone -
0.25 Rem/yr
0.75 Remdyr
0.75 Rem/yr
Gonads -
4 Rem in 30 yr
Since there is no adequate scientific information which would support
general guidance for cleanup of plutonium contaminated soil,
guidance can only be developed on a case-by-case basis using conservative assumptions and safety factors.
With this in mind,
the
Task Group recommends the following for use in making decisions
concerning 23954 cleanup operations at Enewetak:
a.
<
40 pCi/gm of soil - corrective action not required.
b.
40 to 400 pCi/gm of soil - corrective action determined on a
case-by-case basis* considering all radiological conditions.
c.
> 400 pCi/em of soil - corrective action required.
ASSESSNENT OF DOSES AND
THE RESULTS OF ALTERNATIVE CORRECTIVE ACTIONS
The Task Group approach for development of judgments and recommendations
for the radiological cleanup and rehabitation of Enewetak was to consider
a number of alternatives for exposure reduction that may be feasible.
the procedure involved four steps:
*See Appendix III for additional guidance.
-5-
Basically,