[ RadSafe ] Radon progeny in CNG vehicles gas tanks

Neilson, M. Eric, SA Eric.Neilson at vsp.virginia.gov
Thu Apr 17 09:55:17 CDT 2014

Saw your question on RadSafe.  I have attached a copy of DHS DNDO's
Source of the Week for March 30th-April 3th. At the end of the news
inserts, there is a tri fold pamphlet that discusses this very issue. I
would have liked to post it to the RadSafe site, to share with everyone,
but the attachment is 747 KB.    


S/A M.Eric Neilson
Virginia State Police
Area 71
and Criminal Interdiction
HazMat Response Unit
804 840-2456

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-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of John Hultquist
Sent: Wednesday, April 16, 2014 5:59 PM
To: radsafe at health.phys.iit.edu
Subject: [ RadSafe ] Radon progeny in CNG vehicles gas tanks

I could use help in exploring a question with fellow radsafers in
knowing if bi-fuel or CNG vehicles are triggering radiation alarms
because of radon and its decay products as a natural contaminant of the
natural gas.

I understand that hydrocarbons from the Dakotas and Pennsylvania are
being produced with radon as a natural contaminant.

I am going to speculate that as vehicles with CNG tanks age, the
lead-210 from any natural gas with radon is going to build up (Pb-210
half-life is
22.26 years)in the inside wall of the tank.   Maybe the radiations from
Pb-210 or Bi-210 will cause radiation detectors across the country to

Any insight to this issue would be appreciated.

John Hultquist,
Utah Division of Radiation Control
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