[ RadSafe ] Activity versus dose/exposure

[William Lipton]

Here are come possibilities:

   - Did you account for decay (half life = 2.645 years)?
   - Did you account for the neutron dose?
   - With the neutron dose, you have to specify whether it's air dose or
   tissue dose.

Bill Lipton
It's not about dose, it's about trust.


On Thu, Jun 23, 2011 at 11:13 AM, Rouse, Raymond Lawrence
<rlrouse at tva.gov>wrote:

> OK all you radsafers,
>
> A colleague and I were working on a problem earlier yesterday when this
> post came out.
>
> Calculate the 30 cm reading from a 304 milli-curie Cf-252 source. We
> used the gamma constant of 1.131 e-5. We came up with the same dose
> rate,  here is the problem it was 10 times less then what the
> manufacture is telling us. So we decided to used micro-shield program
> and that number was even smaller than what we came up with - much
> smaller.
>
> Anyone care to take a stab at this?
>
>
> Raymond Rouse
> Health Physicist
> Watts Bar Nuclear Plant
> PO Box 2000
> Spring City, Tn 37381
> (423)-365-1881
> rlrouse at tva.gov
>
>
>
> ----- Original Message -----
> > From: "Carol Marcus" <csmarcus at ucla.edu>
> > To: "The International Radiation Protection (Health Physics) Mailing
> List" <radsafe at agni.phys.iit.edu>, "The
> > International Radiation Protection (Health Physics) Mailing List"
> <radsafe at agni.phys.iit.edu>
> > Sent: Wednesday, June 22, 2011 12:22:54 PM
> > Subject: Re: [ RadSafe ] Activity versus dose/exposure
> > Dear John:
> >
> > It's called the "Specific Gamma-ray Dose Constant" and you can find a
> > table of them on pp 6-10 to 6-14 in the third edition (1998) of
> > Schleien, Slaback, and Birky's "Handbook of Health Physics and
> > Radiological Health".
> >
> > Carol S. Marcus, Ph.D., M.D.
> > Depts. of Radiation Oncology and of Radiological Sciences
> > David Geffen School of Medicine at UCLA
> >
> --
> John G. Center, Jr.
> Radiation Safety Officer
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