Re: Finger rings and P-32

[jmcguire@postbox.acs.ohio-state.edu (Jeanne C. McGuire)]

At Ohio State University, in calendar year 1994 the average whole body dose
to P-32 users was minimal, the average extremity dose was 70 mrem.  The
highest whole body reading was 70 mrem, the highest extremity reading was
3,190 mrem (only six ring badges exceed 1,000 mrem (2% of annual dose limit).

>
>Hi All,
>
>I was just wondering, what is the efficiency of a (single element?) 
>finger ring for P-32 beta dosimetry?  What is the Min Dose measurable?
> 
>Also, the 10% limit for badging (10CFR20.1502) would be 5 rem/yr (skin and 
>extremities), 500 mrem/yr(whole body). Has anyone on radsafe had a PI or 
>worker get that much from using P-32 in a lab?
>
>As a note, I noticed that processors are not required to have NAVLAP
certification for 
>extremity monitoring (10CFR 20.1501.c). 
>
>P-32 (roughly) has 1.7 MeV beta (E max), 0.69 MeV (E ave)
>
>-Bruce Busby
>
>