回覆： Re: [ RadSafe ] Disposal via Decay in Storage

[Leung Kim Cheung]

This question is always in my mind that if time is the only one parameter we considered, then how about a large quantitiy of Tc99m? 1mCi and 100mCi Tc99m decay to different activity after 1 weeks.
 
Samuel Leung

John Jacobus <crispy_bird at yahoo.com> 說：
Khalid,
Just wait a week and it decays away.

--- Khalid Aleissa wrote:

> I believe that the question still is not answered
> ... how we get rid of 
> Tc-99m ...
> 
> Khalid
> ----- Original Message ----- 
> From: "Baratta, Edmond J" 
> To: "'Cary Renquist'" ;
> "RADSAFE List" 
> 
> Sent: Thursday, November 10, 2005 6:43 PM
> Subject: RE: [ RadSafe ] Disposal via Decay in
> Storage
> 
> 
> >
> > Technetium-99m has a six (6) hour half-life. 
> After sixty (60) hours it
> > should have decayed away. This is
> radiopharmaceutical that is commonly
> > used. That's why it is popular, otherwise we
> would have people walking
> > around who are 'hot'.
> >
> > Edmond J. Baratta
> > Radiation Safety Officer
> > Tel. No. 781-729-5700, ext 728
> > FAX: 781-729-3593
> >
> > This is my opinion and not those of my Agency.
> >
> >
> > -----Original Message-----
> > From: radsafe-bounces at radlab.nl
> [mailto:radsafe-bounces at radlab.nl] On 
> > Behalf
> > Of Cary Renquist
> > Sent: Wednesday, November 09, 2005 6:02 PM
> > To: RADSAFE List
> > Subject: [ RadSafe ] Disposal via Decay in Storage
> >
> > Quick question:
> >
> > Is Tc-99m a candidate for disposal via
> > decay-in-storage?
> >
> > If so, what would be a acceptable method for
> > monitoring the decayed material prior to release?
> >
> > Thanks for any info.
> > Cary
> >
> > _______________________________________________
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+++++++++++++++++++
On Oct. 5, 1947, in the first televised White House address, President Truman asked Americans to refrain from eating meat on Tuesdays and poultry on Thursdays to help stockpile grain for starving people in Europe. 

-- John
John Jacobus, MS
Certified Health Physicist
e-mail: crispy_bird at yahoo.com




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