RE: US radiation safety limits not based on science-GAO

[Gerald.P.Lahti@ucm.com]

The regs state, that each licensee shall conduct operations so that the
following are not exceeded:
10CFR20.1301(a)(1) -- 100 mrem/yr TEDE
10CFR20.1301(c) -- an increase to 500 mrem/yr TEDE may be applied for [but
not necessarily granted]
10CFR20.1301(d) -- In addition to the above, licensees must also meet the
EPA standards of 40CRF190, which is 25 mrem/year whole body, among other
things, from ALL sources of the nuclear fuel cycle. 
And if this isn't enough we have the limits [design objectives] of 10CFR50,
Appendix I for radioactivity released in effluents
* * * * * * * * * * * * * * * * * *
Jerry Lahti
ComEd - Downers Grove
(630) 663-6659
gerald.p.lahti@ucm.com
* * * * * * * * * * * * * * * * * * 

> -----Original Message-----
> From:	Otto G. Raabe [SMTP:ograabe@ucdavis.edu]
> Sent:	Monday, July 17, 2000 10:35 AM
> To:	Multiple recipients of list
> Subject:	Re: US radiation safety limits not based on science-GAO
> 
> At 09:41 AM 7/17/00 -0500, Dave Derenzo wrote:
> >Aren't the NRC limits for the public 100 mrem per for most of the 
> >population and 500 mrem per year to a small fraction of the 
> >population?  Where did the 25 mrem limit come from?  Where in the regs is
> 
> >the EPA limit of 15 mrem found?
> *******************************************
> July 17, 2000
> Davis, CA
> 
> I believe that the NRC 25 mrem annual limit assumes that a person might
> have up to four other exposures per year from other sources, so this
> limits
> the total for such a person to 100 mrem per year.
> 
> I believe that he EPA 15 mrem is based on a hypothetical mathematical
> calculation of lifetime risk using a the standard LNT model. 15 mrem per
> year times 70 years of life is about 1 rem which EPA believes represents a
> lifetime cancer risk of one in twenty-thousand.
> 
> Otto
> 
> 	*****************************************************
> 	Prof. Otto G. Raabe, Ph.D., CHP
> 	Institute of Toxicology & Environmental Health (ITEH)
> 	(Street Address: Bldg. 3792, Old Davis Road)
> 	University of California, Davis, CA 95616
> 	E-Mail: ograabe@ucdavis.edu
> 	Phone:(530) 752-7754, FAX:(530) 758-6140
> 	*****************************************************
> ************************************************************************
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