Decommissioning Experience with Pipe monitors

[Judd Sills <sillsj@GAT.COM>]

I am interested in finding out if any of the Health Physics folks here
in the states have had any experience using a "pipe monitor" to 
obtain release to unrestricted use of lengths of pipe during 
decommissioning or similar work.  When I say "pipe monitor,"
I am referring to a peanut G-M probe that may be pushed through
sections of narrow piping that may be a candidate for free release
if a good survey is completed.  What I would like to hear about is
(1)where did you obtain the monitor from (vendor)? (2)what was
your experience with using the monitor? (3)what type of hurdles
you might have faced with regulators regarding the use of the 
"pipe monitor" to release piping.(4)was your "pipe monitor" an
off the shelf item, or custom made?   Any feedback regarding this
application would be greatly appreciated.  Please reply to
me directly.  Please provide a means for me to contact you
if you reply.

Thanks for everyone's help, and best regards.
J. M. Sills, CHP                                          (619)455-2049
General Atomics, Room 01-166C      Fax:(619)455-3181
3550 General Atomics Court              E-Mail:  sillsj@gat.com
San Diego, CA  92121