Re: Powernet: In Vivo and In Vitro Counting Protocols

[Thomas J Vandermey]

For any uptake Fermi's policy is to do daily body counts, if possible, until activity is non-detectable.  With rare exceptions, we see only ingestion retention patterns (if there's an inhalation component it's non-detectable).

 

We have not seen significant alpha uptakes.  Any alpha dose would be accounted for by scaling factors and/or air sample data.  But if we get to 100 mrem we would normally consider in vitro sampling.  Nothing specific is required, but my thought is that a 3 day cumulative fecal sample might be the best protocol for our ingestion uptakes.

 

 

Tom VanderMey, CHP
Principal Radiological Engineer
DTE Energy, Fermi 2
734-586-1539

-----owner-power...@hps1.org wrote: -----

To: "powernet@hps1.org" <powernet@hps1.org>
From: "GOWDY, GREGORY M" <ggo...@scana.com>
Sent by: owner-power...@hps1.org
Date: 09/22/2010 06:54PM
Subject: Powernet: In Vivo and In Vitro Counting Protocols

1.       V. C. Summer would like to know what kind of in vivo counting protocols your nuclear plant has when you have workers with significant (>10 mrem beta/gamma + alpha) measured internal doses.

2.       Do you follow a set counting frequency every time so that the counts can be done by HP Techs without input from a Staff Health Physicist or other qualified technically-qualified individual?

3.       If you ever experience significant alpha intakes at your nuclear plant that require you to perform in vitro bioassay (fecal and urine sampling), do you follow a set collection protocol for each sample type that is set up for being run by HP Techs without Staff HP or other technically-qualified individual input?

4.       Do you have separate protocols for fecal sampling and urine sampling?

5.       If you use urine sampling for in vitro, do you specify 24-hr urine or spot urine?

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