33
4.5 Summary
DOE-1982 stated the whole-body dose (integral) to be 2.5 re
for
T at
about 1 rem too hig for
the period 1978-2008, of which 1.63 rem stems from cesium-137.
dose, based on the type B community diet, is
the following reasons.
Whole-body counting is the superior method for the determina ion of
the cesium-137 whole-body dose.
Based on 1978 conditions at Rong lap
Island, the cesium dose by that method for 1978-2008 would be .62 ren
(committed effective dose equivalent).
For strontium-90, the urine-derived dose of .021 rem is 60% f that
calculated from the diet {.035 rem).
The difference is in the sa e
direction as that for cesium, and is small enough in absolute ter 8 so
that it will not materially affect the outcome one way or the othér.
For plutonium-239, the estimates based on urine (median valu@) and
diet are close enough for practical purposes (.005 rem and .009 r n,
respectively;
total transuranic, .010 and .020 rem respectively)
However, as noted above, the wide spread of the urine data do cal!
further investigation.
for
I therefore conclude that the doses in Table 4.5 #1 fall we! 1
within the present EPA guide for the general population of the U.: oA. (5
rem for 30 years, committed effective dose equivalent, standard ni n;
I
also take 30 rem in any one tissue except lens). They also satis: y the
ICRP and NCRP guides (3 rem).
Whether or not these estimated doses guarantee that no one if any
one year will exceed the individual guide of 0.5 rem, I cannot saf¥.
and large that should be so.
By