Re: I-131 treatment rooms

["J. J. Rozental" <joseroze@netvision.net.il>]

Just comments about principles on the Safe of Practices:

Components, structures and systems need to be classified on the basis of
their safety significance and to be designed and installed to a level of
quality commensurate with associated risks of various types, for
each particular facility, including environment.

The responsibility of the Regulatory Authority is to set safety
objectives and standards and to monitor and enforce license conditions;

The task of producing a safe design lies with the User's design
group and a separate User's group carrying out the need
to provide, by independent verification, that all safety requirements and
objectives have been met.

Since engineered system mail fail despite all careful precautions, it is
a basic design concept to provide the diversity of equipment, and, if
necessary, in this specific case, a separate drain pipe from the toilet of
I-131
treatment room to the main hospital sewer line.

However, it's important to fix the idea, that the task of producing a safe
design lies with the user, that needs to confirm that the design of the
installation will fulfill the safety objectives, before ask for a formal
 submission to the Regulatory Authority.

Regulatory Authority can't oblige the User to adopt a Safety System, if the
User has alternatives to present and to ensure that failures or combinations
of
failures that might lead to significant radiological consequences are of
very low
probability.

Jose Julio Rozental
joseroze@netvision.net.il
Israel





----- Original Message -----
From: Redmond, Randy R. (RXQ) <rxq@ornl.gov>
To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
Sent: Friday, December 01, 2000 1:20 PM
Subject: RE: I-131 treatment rooms


Actually, it's probably not a bad idea/requirement.  The sewer line is
isolated from other non-radioactive sewer lines and will help prevent
contamination problems during sewer line maintenance in other parts of the
hospital (I've seen sewer line snakes go where no one thought they would).
Additionally, any back-up of sewage (I imagine this occasionally happens at
hospitals) will be restricted to the treatment room.

Just my thoughts,

Randy Redmond
BWXT Y-12 L.L.C.
Y-12 National Security Complex
Radiological Control Organization
Email:  rxq@Y12.doe.gov
Phone:  865-574-5640
Fax:  865-574-0117


> -----Original Message-----
> From: J SWOY [SMTP:rxdrugs@yahoo.com]
> Sent: Thursday, November 30, 2000 7:48 PM
> To: Multiple recipients of list
> Subject: Re: I-131 treatment rooms
>
> Your waste goes to a common sewer, and shares the
> waste stacks and ventillation stacks from that point
> on?
>
> I understand the density of urban areas, and in the
> United States we have to do a yearly survey of the
> nearest dairy farm; but requiring a seperate waste
> stack to feed into a common sewer line is silly.
>
> You need education of the Ministry of the Environment,
> and if you do not do, who will?
>
>



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