[ RadSafe ] Disposal via Decay in Storage

[ROY HERREN]

John and Cary et al,
 
   The applicable US regulations can be found at the following web page:
http://www.gpoaccess.gov/index.html by selecting the "Code of Federal Regulations" hyper-text under the Executive Resources header in the center of the page.  One would want to specifically search for "10CFR35.92".  It states "(a) A licensee may hold byproduct material with a physical half-life of less than 120 days for decay-in-storage before disposal without regard to its radioactivity if it-.........(see the referenced CFR for full text)
 
   So the answer is yes, TC-99m can be a candidate for decay-in-storage.  However, I must caution that Cary should examine his particular U.S. Nuclear Regulatory Commission, Materials License, and verify that he has authorization to hold radioactive material for decay in storage.  If he does have authorization then he can follow the monitoring, handling, and record keeping steps outlined in 10CFR35.92, and 35.2092.
 
Roy Herren

John R Johnson <idias at interchange.ubc.ca> wrote:
Cary et al

I don't know the reg's in the US, but in Canada the criteria is based on the
concentration, and Tc-99 would have to be considered.

It's concentration would be a factor of 6.O hrs/0.212000 x10^6 lower.

John
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-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl]On
Behalf Of Cary Renquist
Sent: November 9, 2005 3:02 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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Roy Herren
		
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