Re: use of neutron sources

[Les Fraley <les@lamar.ColoState.EDU>]

On Wed, 5 Feb 1997 LIPTONW@detroitedison.com wrote:

> 
> I received a note from our maintenance group that roofers will be bringing a 
> neutron source on site.  I have no idea what this is for! 
>  
> I'd appreciate information from anyone who is familiar with this use of a 
> neutron source regarding: 
>  
> what kind of source 
>  
> expected activity level 
>  
> purpose 
>  
> special precautions 
>  
> Please reply thru RADSAFE or directly to me. 
>  
> Bill Lipton 
> liptonw@detroitedison.com 
>  
The most likely purpose is to use the neutron source to measure moisture
(potentially) trapped under the surface of the roof.  If so, it is
essentially a neutron soil moisture gauge, slightly reconfigured for the
specific purpose of measuring roof moisture.  Locating these spots on flat
roofs allows repair and prolongs roof life.
Les Fraley
Colorado State University, retired
Ft Collins  CO 80523
les@lamar.colostate.edu