FW:

["Wood, Michael" <woodm@crl5.crl.aecl.ca>]

HOT DUST

Personal air samplers(PAS) or static air monitors are used by workers where 
there is the potential to inhale actinide particulates.  We are being asked 
to develop the capabilities and establish a procedure to make retrospective 
particle size measurements on particles collected on filter papers shown to 
be contaminated by alpha spectroscopy.
This is a two part problem.  We need a method of locating the active 
particles and determine their relative activity among the non-active 
particles, perhaps using CR39.  Once the hot particles have been located it 
is important to know the size because the size will have a significant 
impact on dose.   One possibility being looked into is image analysis.  This 
is a new project for us, so any advice on this topic would be appreciated.


Please contact Richard Richardson;
Radiation Biology and Health Physics,
AECL, Chalk River Research Laboratories, Chalk River, Ontario, K0J 1J0.

Telephone  613-584-3311 extension 4755

Fax  613-584-1713

email  RICHARSON@CRL.AECL.CA
            OR
         RICHARDR@CRL5.CRL.AECL.CA

Note:  If you reply within the next 2 weeks please forward e-mail messages 
to Mike Wood (woodm@crl5.aecl.ca).  Mike will forward your messages to other 
members of our internal dosimetry team.  If you would like to make contact 
by phone please call Shelly Starling @ 613-584-8811 (4745 or 4528)