Fermi uses the Ludlum 43-10 alpha counter with Ludlum 2000 scaler. We have a nominal limit of 1,000,000 dpm; however we have counted several smears in the 3,000,000 dpm range. We have not have not had issues of monitor contamination; however the counter is in a hood.
Tom VanderMey, CHP Principal Radiological Engineer DTE Energy, Fermi 2 734-586-1539 [email protected] wrote: ----- To: "[email protected]" <[email protected]> From: "Byrum, William F" <[email protected]> Sent by: [email protected] Date: 08/27/2012 08:45AM Subject: Powernet: Alpha Counting Duke Energy request to following information: What do you use to count smears for alpha/ beta activity? Canberra iSolo, Ludlum 3030P, other? Do you have a limit on the activity (dpm) that can be counted using a smear counter? And if you have a limit on activity, what is the limit and how do you count smears above the activity limit (beta) for alpha? Bill Byrum, CHP,RSO EnRad Laboratories Duke Energy [email protected] Phone 980.875.5811
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