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Re: Leak test of Kr-85 radioactive source
One question and 2 answers:
1. Why would you want to leak test such as source, since it can't spread
contamination? Most NRC license provisions for leak testing exempt gaseous
sources.
2. I can tell you in advance that the source is leaking, since noble gas will
diffuse through any containment. The only question is the leak rate.
3. The best way to determine the leak rate is to take periodic measurements of
the source activity, corrected for decay.
The opinions expressed are strictly mine.
It's not about dose, it's about trust.
Curies forever.
Bill Lipton
liptonw@dteenergy.com
Fazal-ur-Rehman wrote:
> Dear Radsafers
>
> Could anyone tell us how to do leak test of a radioactive Kr-85 source. This
> source is a beta emitter used as a thickness guage. In my openion, Kripton
> is an inert gas and it will not stick on the surfaces and will be taken away
> by the air, therefore, we can not take smear or wipe samples to see whether
> the source is leaking or not. We would appreciate it if somebody could
> suggest the proper way to find the leakage of this source.
>
> Thank you in advance.
>
> Fazal-ur-Rehman
> P.O. Box # 1292
> Department of Physics
> King Fahd University of Petroleum & Minerals
> Dhahran 31261
> Saudi Arabia
>
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