Re: Re Special Form Certificates Applied to Old Sources.

[Celia Rajkovich - Radiation Safety <celiar@andrew.cmu.edu>]

working life on gauges:
for instance take the troxler moisture/density gauge, it has an americiumBe
(t1/2 248) and a cesium source; the working life is only 15 years reason -
as the gauge is used the rod which holds the cesium source takes wear and
tear as well as the shutter for the amercium housing-they are used in
harsh/cruddy enviroments at times.

--On Thursday, February 22, 2001, 8:03 PM -0600 Emil Murat
<kerrembaev@yahoo.com> wrote:

> Mike,
> 
> This is one of those cases.
> 
> 1. Nobody thinks, what will be in fifteen years, when
> they are buying a gauge ...
> 
> 2. How much does it cost to change containers?
>  
> 3. May be it is the time to buy a new gauge? 
> 
> 4. I would suggest you in any situation to do
> ADDITIONAL leak tests to check and to show.
> 
> 5.1. To check that if it is still sealed alright.
> 
> 5.2  To show your regulator that you are aware about
> the problem.
> 
> 6. Not to offend the other side of the aisle:
> 
> Regulators are also humans and they can understand
> your problem and may be you will get a break.
> 
> 7. Or just buy a new gauge.
> 
> 8. If I were you, I would buy a new, if I had the
> money, of course.
> 
> 9. For mind sake, just do not repeat the mistake of
> you predecessors and buy gauge with "Unlimited
> millage"
> 
> 
> I have a question of my own:
> 
> Is there a technical reason for 15 years limit on
> certificate or it
> is just a business driven decision?
> 
> They won't sell too many gauges if Y'all could use
> them for too long. Right?
> 
> 
> 
> 
> You wrote:
> 
>>>>> 
> Morning All,
>                             Could you assist me by
> commenting  on the US
> situation involving the transport of Special Form
> sources..
> Radioactive sources with activities which exceed the
> A2 value, which are
> enclosed in a capsule, the design of which is approved
> as Special Form can
> be transported  in a type A container. For the
> purposes of complying with
> the transport regulation must a type B container be
> used if :
> 1 The Special Form Certificate has expired.
> 2. If the manufacturer has not imposed a Recommended
> Working Life(RWL) but
> the source is more than 15 years old.
> 3. If the source is older than the manufacturers AWL.
> Can a source older than the RWL be transported as
> Special Form  in a Type A
> container when the capsule Special Form approval
> certificate is current and
> the source has been immersion test according to the
> appropriate ISOstandard.
> If you intend to transport pre 1985 nuclear density
> gauges such as Troxler
> or Campbell Pacific must the 50 mCi Am 241 Be neutron
> sources be removed
> from the base of the gauge and transferred to a type B
> container.
> Thanks for your comments.Best Regards,Mike
> Malaxos.Radiation Safety Services
> Mike@radiationsafety.com.auwww.radiationsafety.com.au
> 69 Robinson Avenue Belmont Western Australia 6104
> Phone 61 (0)8 94750011 FAX  61 (0)8 94750011
> 
> 
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