[ RadSafe ] Texsport Item #14210 - Lantern Mantles

[John R Johnson]

Mike

Mantle containing Th are useful because they can be used for calibrations.
Just make sure that they are left in the package they were sold in.


John


On Wed, Jul 11, 2012 at 8:02 AM, Brennan, Mike (DOH) <
Mike.Brennan at doh.wa.gov> wrote:

> My take, only somewhat flip, is that you can't trust a Chinese product
> contains what it is supposed to and only what it is supposed to, even if
> what it is supposed to contain is something that would freak out many
> environmentalists.
>
> -----Original Message-----
> From: radsafe-bounces at health.phys.iit.edu
> [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Chris Alston
> Sent: Tuesday, July 10, 2012 3:38 PM
> To: The International Radiation Protection (Health Physics) Mailing List
> Subject: [ RadSafe ] Texsport Item #14210 - Lantern Mantles
>
> Folks
>
> The packets of these mantles, the which are Made in China, give as the
> primary ingredients nitrates and hydroxides of Th.  Another ingredient,
> for
> what it is worth, is cerium.  They are also labelled with all sorts of
> cautionary messages in re proper handling, including warnings that they
> emit radioactive materials, and that California knows them to be
> carcinogenic.  I see no significant readings, i.e., there may be a
> slight
> excursion above background with a pancake GM at contact, but certainly
> not
> the check-source-worthy output one would expect.  Does anyone have a
> take
> on this?  It has occurred to me that the packet may be intended for use
> with mantles from one supplier, but was filled in the factory with
> mantles
> of the same spec from a different supplier.
>
> TIA and
>
> Cheers
> cja
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