Detection criteria for frisker probe.

[John_McCarthy@bedison.com (John McCarthy)]

     I'm conducting an informal survey to see what the Industry is using 
     for frisker detection decisions, particularly when using a 15-20 cm2 
     GM "pancake" probe in backgrounds of 40-80 cpm.
     
        Do you call an item contaminated at the critical level (i.e., Sc 
        or Lc see NUREG/CR-4007, L.A. Currie) or at the detection level 
        (i.e., Sd, or Ld, see NUREG/CR-4007, L.A. Currie)?  Or do you call 
        something contaminated whenever count rate is perceived to increase 
        audibly or visually by meter?  
     
     Note - I am aware of Sommer's paper, IEC 81-07, IEN 85-92, HPPOS-072, 
     HPPOS-250.  What I'm looking for is how these guiding documents are 
     applied when releasing large, bulk materials suspected of being 
     externally contaminated (disregard internal contamination, 
     non-aggregate or liquid samples, small or personal hand carried items 
     and personnel).
     
     Please respond directly to John_McCarthy@BEDISON.com or call 
     508-830-8158.
     
     Thank you in advance for your responses.
     
     Jack
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