RE: Radon in LP Gas

["Jacobus, John (OD/ORS)" <jacobusj@ors.od.nih.gov>]

I just checked in NCRP Report No. 95, Radiation Exposure of the U.S.

Population from Consumer Products and Miscellaneous Sources." They list the

annual dose equivalent exposures as



Natural gas

	Heaters -- 0.22 mSv (number exposed 16 M)

	Cooking -- 0.05 mSv (number exposed 125 M)

Liquefied petroleum gas -- 0.016 mSv (number exposed 18 M)



The value for liquid propane may differ, as the boiling point is -42.1

degrees C, and radon is -61.8 degrees C.  It is possible that the radon is

separated or concentrated as the gases are isolated.  For example the

boiling point of methane is -164 degrees C.



-- John 

John Jacobus, MS

Certified Health Physicist 

3050 Traymore Lane

Bowie, MD  20715-2024



E-mail:  jenday1@email.msn.com (H)      



Tad Blanchard wrote:



>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.



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