Re: ICRP/NCRP Risk Factor Use

["J. J. Rozental" <josrozen@netmedia.net.il>]

Lets considerer a different way:

If, for example, the collective dose in a given year was 200 man.Sv, using a
risk-dose conversion value of 5 E-2 per Sv  (Instead 4 E-2, to be coherent
with the ICRP 60), 10 excess cancer deaths would be expected. This would
apply equally to a population of 10,000 people each receiving 0.02 Sv, and
to a population of 200,000 people each receiving 0.001 Sv, even though the
risk to individuals in the two populations would differ by a factor of 20

J. J. Rozental <josrozen@netmedia.net.il>
Israel 

At 03:16 PM 10/26/98 -0600, you wrote:
>Question for the group:
>
>Given a risk factor of 4 E-2 fatal cancers per Sv and a collective dose
>of 1 Sv for a particular group, how is the resulting 4 E-2 fatal cancer
>risk interpreted?
>
>4 E-2 fatal cancer risk for each person in the group OR
>4 fatal cancers per 100 persons in the group, 40 per 1000, etc.?
>
>I had read previously -- ICRP and NCRP -- that the fatal cancer risk
>values only applied to populations not to individuals, but ICRP 26
>para 60 talks about *individuals* specifically.
>
>Thanks in advance for any information you may provide!
>v/r
>Michael
>*************************
>Michael S. Ford, CHP
>Radiation Safety Department
>Battelle Pantex
>Amarillo, TX
>806.477.5727 phone
>806.477.4198 fax
>mford@pantex.com
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