RE: Iodine Equivalent

["Morgan, Ben" <ben.morgan@cplc.com>]

Greetings:

Our Technical Specifications contain the following definition:

"DOSE EQUIVALENT I-131 shall be that concentration of I-131 (
microCurie/gram) which alone would produce the same thyroid dose as the
quantity and isotopic mixture of I-131, I-132, I-133, I-134, and I-135
actually present. The thyroid dose conversion factors used for this
calculation shall be those listed in Table III of TID-14844, `Calculation of
Distance Factors for Power and Test Reactor Sites.'" 

I don't have a copy of TID-14844 handy, but the formula we use is:

I-131 dose eq. = I-131 + I-132 X 0.036 + I-133 X 0.270 + I-134 X 0.017 +
I-135 X 0.084

Regards,

Ben

ben.morgan@cplc.com

I am not an official spokesperson for CP&L.
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