Re: Neutrons and Ice Vests

[sandy_perle@email.fpl.com]

     Thanks to all who responded to this question. I have received a lot of 
     valuable information and suggestions for consideration. The responses 
     are about 50/50 for wearing the neutron dosimeter under the vest 
     versus outside the vest.
     
     We have conducted neutron spectral analysis at all four of our nuclear 
     reactors, all PWRs. The spectrum is predominantly consistent with the 
     Deuterium moderated Cf-252 spectrum. Our correction factors are based 
     on this energy and were developed with dosimeters placed on a phantom 
     without any other shielding. Our normal location when a worker is 
     wearing only 1 set of PCs can be either inside or outside the 
     clothing. The filtration is not that significant. The filtration 
     provided by an ice vest would be greater. I'll be conducting a small 
     test having a few workers wear 2 dosimeters, one underneath and one 
     outside and see if there is any statistical difference. I'll report 
     back to those who have requested the results if such a test were 
     conducted.
     
     Thanks again to all who replied.
     
     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
     
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