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Collective dose and its monetary valuation
Another point of view: In years past, we used the common power
plant $/person-rem derivation related to the costs associated
with replacing a worker who reached administrative control levels
and therefore was no longer available for radiation work. Since
this was a rare occurence, about seven years ago our budgeting
people objected (when presented with alternatives in a bidding
process) and caused us to revise the basis for our $/person-rem
value. We finally got concurrence with the budget folks and
settled on a sum of societal costs (derived from an update of
older figures in literature associated with health detriment),
training costs, and the value of radiation protection services
(which was the majority of the value). The concept is simply
what is the "extra cost" for radiological work (dosimetry,
contamination control, waste disposal, HP coverage, etc.) For
three types of work (high dose/high HP support, low dose/moderate
HP support, and moderate dose/low HP support) we found a total
cost of about $10,000/person-rem. This figure was applied when
alternatives were presented such as the extra cost for
remote/robotic equipment vice manual. As others have mentioned
and experienced, rarely can these figures provide sufficient cost
benefit to drive plant modifications for dose reduction. A good
review of the issue was written by John Baum of Brookhaven in the
March/April 1991 Nuclear Plant Journal. Also, note that the NRC
recently published in NUREG-1530 an update of the figure used in
their internal evaluations of cost justification for dose
avoidance associated with new regulatory requirements (now
$2000/person-rem).
Eric Goldin
Southern California Edison
goldinem@songs.sce.com