[ RadSafe ] Limited Quantity

[The Wilsons]

Bill,
I believe the Postal Service may have something to say about this.

Bob Wilson

On 1/4/2011 11:03 AM, William Lipton wrote:
> You are correct, there is no activity limit for an excepted package, if
> these are the only radionuclides present.  Note that these radionuclides
> have very low specific activity.  Also note that the person shipping an
> excepted package is NOT exempt from the DOT training requirements.
>
> Before going to the trouble of preparing an excepted package, you should
> also note that the "exempt"  concentration and activity limits of 49 CFR
> 173.436 for these radionuclides are high:  I-129 = 2.7 uCi, Mn-53 = 27 mCi,
> Ni-59 = 2.7 mCi.  You may be able to ship your package without regard to its
> radioactivity.  Please note that if you are shipping a package by an air
> express service, such as Fedex, the IATA regulations apply.
>
> On a somewhat tangential note, I am surprised that the exempt activity limit
> for Co-60 is 2.7 uCi.  Assuming that all of this activity is in a point
> source, the 1 cm, unshielded dose rate would be approximately 36 mrem/hr.
> Yet, such a source could be shipped as nonradioactive, e.g., you could mail
> it without any radioactive markings.  This seems to be a potential hazard to
> an untrained person if the package fails.
>
> Bill Lipton
> It's not about dose, it's about trust.
> Curies forever.
>
>
>
>
> On Tue, Jan 4, 2011 at 10:44 AM, Tung, Enoch<Enoch.Tung at perkinelmer.com>wrote:
>
>> Hi All,
>>
>>
>>
>> Quick questions about LQ.
>>
>>
>>
>> As per 10 CFR 49, limited quantities for liquid (normal form) is 10^-4 *
>> A2.
>>
>>
>>
>> Now in table 173.435 there are some entries that show A2 (and A1) values
>> to be "unlimited".
>>
>> ie.  I-129, Mn-53, Ni-59, etc.
>>
>>
>>
>> Does this mean the limited quantity for those isotopes are also
>> unlimited?
>>
>> In effect, there is no activity limit to ship those isotopes as Excepted
>> Package, as long as surface dose rate and TI criteria are met?
>>
>>
>>
>> Thanks,
>>
>> Enoch
>>
>>
>>
>>
>>
>>
>>
>> Enoch Tung | Health Physicist
>>
>> PerkinElmer | For the Better
>>
>>
>> enoch.tung at perkinelmer.com
>>
>> Phone:  +1 617.350.9068   |   Fax:  +1 617.350.9567   |   Mobile:   +1
>> 617.438.7012
>>
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>>
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>>
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>>
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