Re[2]: Measurement of Neutron Exposure In NPP?

[sandy_perle@email.fpl.com]

     Bob Flood gave a very good overview of the question. I will only add 
     that we did an energy spectra analysis in each of our four reactors. 
     Two are Westinghouse and the other two are Combustion Engineering. We 
     utilized two methods to determine the energy at several points within 
     the reactor buildings, the fist was the Bonner Spheres and the other 
     was a Tissue Equivalent Proportional Counter (TEPC). Battelle Pacific 
     Northwest laboratories was provided a contract to perform this 
     evaluation for us (back in early 1983 I believe). The TEPC was more 
     reliable and provided excellent output documentation. 
     
     Since several energies were identified we used the most conservative 
     correction factor for our TLDs, also the Panasonic UD802-AT. It is 
     essentially based on the Cf-252 moderated D2O.
     
     We have not performed another spectra analysis but would if there were 
     a major structural change which would potentially change the spectra 
     to which our workers were exposed. We do neutron surveys and TLD 
     surveys for work evolution changes in areas where data has not been 
     collected before.
     
     
     Sandy Perle
     Supervisor Health Physics
     Florida Power and Light Company
     Nuclear Division
     
     (407) 694-4219 Office
     (407) 694-3706 Fax
     
     sandy_perle@email.fpl.com
     
     HomePage: http://www.netcom.com/~sandyfl/home.html
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