re: Alpha analysis of air samples and contamination smears

[Martinson Timothy I <tmartin@wpsr.com>]

Hello Jack
     We count "all" of our smears and particulate air sample filters for 
alpha. This is done by utilizing equipment that allows for simultaneous 
counting for both beta-gamma and alpha such as the Tennelec (now Oxford) 
LB5100PW and Baird Centicount automated planchet counters. We also use a ZnS 
Scintilator ( SAC-4) for verification of the presence of alpha activity in 
high beta-gamma countrate filters where the beta-gamma channel to alpha 
channel crosstalk may have caused alpha counts to show in the alpha channel. 
Large Area filter papers (Hivols) are measured using a large area dual 
phosphor detector (NE Model DP8A) with an Eberline model RM-24 operated in 
the scaler mode.
    Please feel free to contact me for any Questions


Tim Martinson
Health Physics Group
Wisconsin Public Service Corp
Kewaunee Nuclear Power Plant
N490 Highway 42
Kewaunee, WI  54216
Phone: (920) 388-8345
Fax: (920)388-8331
E-mail: Work: tmartin@wpsr.com
              Home: tmartinson@lakefield.net
-------------
Original Text