Weighting Factor for Hot Particle Skin Doses per Cm^2

[Carol Marcus <csmarcus@ucla.edu>]

Jan. 23, 2003



Dear Radsafers:



This question is probably for health physicists at nuclear power plants.



If you have a worker who received a face skin dose from a single "hot 

particle", expressed as rad/cm^2, what weighting factor do you use in 

adding it to his other doses?  While the original Part 20 specifies a 

weighting factor of 1.0 for a head dose, the Statements of Consideration 

for Part 20 state that "The use of other weighting factors for external 

exposure may be approved on a case-by-case basis upon request to the NRC." 

(Fed. Reg. 56(98):23369; May 21, 1991.)



I assume that a case must have been made to NRC for "hot 

particles".  Anyone know what the weighting factor is?



Much obliged for your help in advance.



Ciao, Carol



Carol S. Marcus, Ph.D., M.D.

<csmarcus@ucla.edu>



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