Re: Weighting Factor for Hot Particle Skin Doses per Cm^2

["E.P. Goldfinch" <goldfinch@NTP.ORG.UK>]

I rarely get involved in scientific issues discussed on the list. Skin

dosimetry, especially in relation to extremities or small areas of skin, is

an area to which ICRP and ICRU should be encouraged to consider more

deeply. My understanding is that it is generally considered to be true that

if the effective dose is within limits, then the skin is adequately

protected from stochastic effects. The skin of the whole body is regarded

as an organ and so the contribution of the dose to a small area of skin has

to be averaged over the whole skin. This does not take account of

deterministic effects, for which ICRP recommends averaging over 1 cm2, but,

I understand, the USNRC now recommends 10 cm2.



The subject is discussed further in The Journal of the ICRU Vol 2 No 2

(ICRU Report 66) and in an Editorial in Radiation Protection Dosimetry Vol

102 No 1 (2002)



E.P. Goldfinch

Nuclear Technology Publishing

P.O. Box No 7, Ashford, Kent TN23 1YW, England

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E-mail: <goldfinch@ntp.org.uk>

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