Re: Approved Internal Dosimetry Services.Questions.

[Radoslav P Radev <rado@uclink2.berkeley.edu>]

On Mon, 12 Sep 1994 cast@epcaba.bologna.enea.it wrote:

> Hello, 
>  in Italy is now under review the radiation protection regulation and several 
> drafts are circulating for comments. Last draft is based on 1990 ICRP 60 
> Recommendations and on a draft of a CEC Directive that is in accordance to ICRP 
> 60. So I was asked to review international state regulations related to approval 
> of services for internal dosimetry. This is now absent in Italy and at my 
> knowledge is now been introduced in the Swiss legislation (Rad. Prot.Dos. 53,95, 
> 1994). I also know that in Great Britain are operating APPROVED Dosimetry 
> Services.
>  Can someone give me some informations about the following questions ?
>  
>  - In your country how is the authority which gives the approval for the 
> internal dosimetry service? Is the Regulatory Commission ?
>  
>  - How many proofs and type of proofs must submit an internal dosimetry centre 
> to be an approved one? It is possible to try several times?
>  
> 	- The approved internal dosimetry centre is responsible, over the in-vivo 
> measurements and bioassay, also of the assessment of the committed effective 
> dose ? If yes, which are the responsabilities of the local health physicist or 
> qualified expert ? [In fact in Italian legislation the evaluation of external 
> effective dose is a peculiarity of the qualified expert, so, by analogy, 
> assessment of internal dose, that is much more dependent on actual exposure way 
> and times, shoul be entrusted only to a qualified expert (or a local health 
> physicist ).]
> 
> Thank in advance for any information provided.
> 
> Carlo-Maria Castellani
> Rad. Prot Institute ENEA
> Bologna - Italy
>   
> 

The new regulations regarding combining the external and internal doses 
went into effect in California (for state licenses) on 1/1/1994.  In 
practice we continue our bioassay program and continue to perform 
bioassays.  In our 
case (University of California at Berkeley) we perform regular thyroid 
scans and urinalysis.  When we assign a internal dose we also convert in 
into whole body effective dose equivalent and combine it with the 
external whole body dose to obtain TEDE.  Our external doses are 
evaluated by external company and the results are provided to us.  It is 
our responsibility to keep all our dosimetry records forever and to show 
them for inspection upon demand from the state inspectors.
Hope that this helps. 

Radoslav Radev
Health Physicist
UC Berkeley
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The opinions expressed are mine and do not represent those of my employer.