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Re: Radioactive Waste Disposal Limits
I sent this several weeks ago, but got little response from our friends
south of dog-sled land. Perhaps there are more concerned experts around
on the system today (like Albert Lee Vest) who may wish to comment.
Anyway, here are some other isotopes of interest, taken from C123.
> In Canada, the Atomic Energy Control Board has just issued a consultative
> document called "C-123 Radioisotope Release Concentrations". This
> document is out for public comment, and will be made into a regulatory
> document in due course, unless it is modified or cancelled entirely.
>
> Here are some examples of limits, showing the current limits and the new
> (proposed) limits:
>
> Releases to:
> Atmosphere (A), in Bq per cubic metre
> Liquid (L), in Bq per Litre
> Solid (S), in Bq per Kilogram
> (Note that 37000 Bq is 1 microcurie).
>
> Isotope Old Limits New Limits
> A L S A L S
>
> C-14 3700 37000 3700000 5 9 200
> H-3 37000 370000 37000000 2000 300000 80000
> I-125 37 370 37000 0.04 200 2
> I-131 37 370 37000 0.03 200 1
> P-32 370 3700 370000 0.8 1 30
> S-35 370 3700 370000 4 800 200
> Tc99m 3700 37000 3700000 1000 40000000 40000
>
> This is just a small (representative) sample of the changes proposed.
>
> I'm looking for comments (printable!), suggestions on how to improve this
> document and also for information on the limits in the USA, currently,
> together with any impending or proposed changes. As you will note, the
> proposed new Canadian limits are much, much more restrictive than the
> current ones.
>
> Thanks in advance,
>
> Chris Davey, RSO
> Cross Cancer Institute
> 11560 University Avenue
> Edmonton, Alberta
> Canada, T6G 1Z2
> (403) 492-7477
> email: cdavey@med.phys.ualberta.ca