Re: ANSI N13.11; NVLAP; DOELAP

[sandy_perle@email.fpl.com]

     George:
     
     I think what you are looking for is NVLAP Handbook 150-4. You can call 
     (301) 975-4016 to obtain a copy.
     
     


______________________________ Reply Separator _________________________________
Subject: ANSI N13.11; NVLAP; DOELAP
Author:  radsafe@romulus.ehs.uiuc.edu at Internet-Mail
Date:    8/18/95 8:23 AM


Hi, there,

The ANSI N13.11 (1993) - criteria for testing has been published for almost
2 years. One of the new features is the angular response testing at 0; 40;
60 degrees.  Although the basis for the recommended angular responses is
somewhat confusing, it is a big step in the right direction.  [see a paper
by Xu, Reece, and Poston " A Study of the Angular Dependence Problem in
Effective Dose Equivalent" Health Physics Journal, pp 214-224, Feburary 1995
].  At the Boston Meeting last month I heard the NVLAP (1995) is also out
(?).  I even heard rumor saying the NVLAP and DOELAP wouldl be combined.

I would like to know more about what is going on and how to get a copy of
the NVLAP (1995).  Thanks!

George Xu, PhD
RSO and Research Assistant Professor of Health Physics
Rensselaer Polytechnic Institute
Troy, NY 12180


>     Reply to Mike Coogen and Bruce Busby re: accreditation of extremity
>     dosimetry systems.  There is now, no requirement for the accreditation
>     of extremity dosimetry systems, but as Bruce states, it is a matter of
>     time.  Currently, the NIST and DOE are awaiting the distribution of
>     the ANSI standard governing performance testing of extremity dosimetry
>     systems.  It is expected that the standard could be published as early
>     as September (I believe that it is finished and ready.)  The National
>     Voluntary Laboratory Accreditation Program (NVLAP) and the DOELAP will
>     implement accreditation programs this fall or next year (if the
>     standard is published.)  The beta sources in the testing standard
>     include 204-Tl, 90-Sr/90-Y and the uranium slab source.
>
>     For further information you can contact Paul Martin (NVLAP) at the
>     NIST (sorry, Paul for (mis?) representing you) or myself (DOELAP) for
>     further info.
>
>     Rick Cummings      (cumminfm@inel.gov)
>     DOELAP Performance Evaluation Program Administrator
>
>     Thoughts and opinions expressed above are my own, based on an aging
>     memory among other things and don't necessarily reflect those of my
>     employer.   *** that is, I can get in trouble quite enough on my own,
>     thank you. ***
>
>
>______________________________ Reply Separator
_________________________________
>Subject: Re: Finger rings and P-32
>Author:  RADSAFE (INELMAIL.RADSAFE) at _EMS
>Date:    8/16/95 8:46 AM
>
>
>Bruce:  Your questions on the efficiency of the finger ring and the minimum
>detectable dose can be answered by the organization that processes your TLDs.
>As for as NAVLAP certification, that would depend upon what areas did the TLD
>processer qualified.  There are several areas to NAVLAP certification.  I
>believe that if you process TLD for extremity exposures, you must be certified
>in that area.  I would get in touch with LES Slazback.  As for as PIs receiving
>greater that 10 percent of limits using P-32, I would say that the potential is
>there, but frequency is rare.  I have quite a few PI using P-32 and the doses
>received by these individuals were insignificant over the 4 years that I
>performed medical research..mike coogen sends
>
>
>______________________________ Reply Separator
_________________________________
>Subject: Finger rings and P-32
>Author:  radsafe@romulus.ehs.uiuc.edu at hq2ccgw
>Date:    8/15/95 6:40 PM
>
>
>
>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
>
>