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Re: Radon

Radon Daughter dose conversion factor:

I dont know how this gets imported into US CFR regs or whatever, but the 'source
documentation' is to be found in ICRP Publ 65, Protection against Radon-222 at
Home and at Work, see p 12 ff and tables 7 and 8.

Cheers,

Mark Sonter

"McCormick, Luke I NWD02" wrote:

> I have to honor of being 'other duties as assigned' as the radon guru for
> the office.
> I am trying to gather together all the valid regs, guidance, information,
> papers and POCs relating to radon.  I've got most of the obvious ones; MSHA,
> OSHA, BIER IV, EPA OSWERs, ARs, ETLs etc. I've got most of the RADSAFE
> archive references for the last year or so, but want to be sure I haven't
> missed something.
>
> In an effort to be thorough I'd like to ask the group to forward references,
> etc. to me at
>
> g6hxxlim@nwd02.usace.army.mil
>
> If we can do this off the list, I will compile what I get, an make it
> available to the list.
> Electronic versions of regs, guidance, etc. are always preferable.
>
> Also, I would appreciate it if someone can explain the radon ALI/DAC
> reasoning.  I am familiar with the BIER IV risk approach, but I thought NRC
> used a dose approach.  From what I came up with for Rn-222 + Daughters, the
> dose to the lung is about 0.7 rad/WLM, but the ALI is 4 WLM.
>
> I am also looking for how others have addressed the OSHA regulations.
> Specifically:
>
> 1) the posting requirements for radon in the workplace (7.5 pCi/l averaged
> over a 40 hour work week) where the work week is greater than 75 hours (75
> hr work week would require posting at 4 pCi/l)
>
> 2) exposure of workers under the age of 18 (minors allowed 10% of MPC, MPC
> is 30 pCi/l)
>
> 3) work in areas with Rn concentrations greater than 30 pCi/l.
>
> Luke McCormick
> Health Physicist, HTRW-CX
> CENWO-HX-H
> 12565 W. Center Rd.
> Omaha, NE 68144-3869
> Voice: (402) 697-2588
> Fax:    (402) 697-2595
> Luke.I.McCormick@usace.army.mil
> ************************************************************************
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The RADSAFE Frequently Asked Questions list, archives and subscription
information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html