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Re: ICRP60 TISSUE WEIGHTING FACTORS : HOW CALCULATED?
Quintino
I understand your difficulty. I found that Roger Clarke's explanation "1990
Recommendations of ICRP" in the Supplement to the Radiological Protection
Bulletin, No 119, 1991 helped me understand ICRP's recommended risk/tissue
weightng factors.
John
_______________________
John R Johnson, PhD
idias@interchange.ubc.ca
----- Original Message -----
From: "Quintino De Notariis" <qdenotariis@novacon.it>
To: "'RadSafe'" <radsafe@list.vanderbilt.edu>
Sent: Monday, August 05, 2002 4:39 AM
Subject: ICRP60 TISSUE WEIGHTING FACTORS : HOW CALCULATED?
> Recently Italian legislation adopted the criteria and terminology of
ICRP60.
> Could someone tell me how Tissue Weighting Factors WT in ICRP60 have been
> calculated?
> I mean, these factors in the old ICRP26 can be easily calculated from Risk
> Factors per Sievert. For exemple, the Risk Factor fr Breast is 2.5E-3 and
> the Total Risk Factor is 16.5E-3; so WT is :
> 2.5/16.5 = 0,15
> The same way you can proceed with Red Bone Marrow, whose Risk Factor per
> Sievert is 2.0E-3 :
> 2.0/16.5 = 0,12
> I can't find a similar procedure for the new WT values in ICRP60.
> I think we should use the values in Table 4, pag. 24 of the publication,
but
> there must be something else to consider that I don't know.
> Could someone help me?
>
> Quintino De Notariis
> Health Physicist
> Corso Vittorio Emanuele 45/E
> 86039 Termoli
>
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