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Fw: Radon in LP Gas
>
>-----Ursprüngliche Nachricht-----
>Von: Tad Blanchard <Tad.M.Blanchard.1@gsfc.nasa.gov>
>An: radsafe@list.vanderbilt.edu <radsafe@list.vanderbilt.edu>
>Datum: Freitag, 20. Juli 2001 22:49
>Betreff: Radon in LP Gas
>
>
>>Hello all,
>>
>>Someone called me this morning and I couldn't give them an answer to this
>question. They wanted to know if there was any significant amounts of Radon
>in Liquid Propane Gas. If someone has information on this, please post a
>link on the radsafe list.
>>
>>I seem to recall seeing something about radon in "natural" gas but nothing
>about LP gas.
>
>
>Tad,
>
>As a first information I can tell you the following:
>
>During production of LPG radon, which has a boiling point in the range
>of -50 C, is concentrated in the LPG. (Radon always accompanies natural
>gas.) Since LPG is usually not used right after production, but stored in
>tanks, the radon will decay (half life 3.8 d). Equipment like pumps and the
>tanks themselves will be contaminated by the accumulated longlived decay
>products like Pb-210 and Po-210. These might pose a radiation hazard by
>inhaling them, when for instance pumps are taken apart and cleaned. The
>accumulation in tanks should not play a big role by external radiation,
>especially because of the shielding effect of steel.
>
>I remember some papers - (one of) the first might have been a paper by
>Howard Pritchard. I do not have them at hand - they are in my office, but
>they are of course not available on the web.
>
>If this information is not enough, please contact me and I would look on
>Monday into my literature collection.
>
>Best regards,
>
>Franz
>
>
>
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