Fermi 2 doesn't have any such protocol for alpha contamination; we don't have any Level II or III alpha areas. We do take urine samples for H-3 before and after diving operations; usually there is an increase due to diving but not at a reportable dose level. However I have a question about the rationale for urine sampling for alpha: Looking at NUREG/CR-4884, either for inhalation or ingestion (and I have to assume that alpha uptakes would follow an ingestion retention pattern), the retention factors for long lived alpha emitters (Pu, Am, Cm) are much greater for feces than for urine. So much so that it would seem unlikely that alpha emitters would ever be detected in urine (although I guess they have been). For example, looking at the ingestion retention fractions for Pu-238/239/250, the factor for a 24 hour urine sample at one day is 3.31E-7, vs. 2.82E-1 for a 24 hour fecal sample at one day. So if someone can explain to me why you would ever take a urine sample for alpha, despite these numbers, I'd appreciate it.
Tom VanderMey, CHP Principal Radiological Engineer DTE Energy, Fermi 2 734-586-1539 [email protected] wrote: ----- To: <[email protected]> From: "Creamer, Charles E" <[email protected]> Sent by: [email protected] Date: 08/14/2011 09:44AM Subject: RE: Powernet: RE: Invitro Sampling Browns Ferry is the same as Palo Verde with the exception of Divers. These will be sampled before the first dive From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Friday, August 12, 2011 10:35 AM To: [email protected] Subject: Powernet: RE: Invitro Sampling Palo Verde provides the following response: Palo Verde does not require in coming workers to submit urine samples as part of the in/out-processing. In-vitro sampling would only be required as a possible action after an intake event involving alpha. Seth From: [email protected] [mailto:[email protected]] On Behalf Of Pell, Bryan Sent: Friday, August 12, 2011 6:46 AM To: '[email protected]' Subject: Powernet: Invitro Sampling Constellation does not require workers coming on site to submit urine samples as part of in/out-processing. However, this is standard practice at DOE and FUSRAP sites. At this time, we would require invitro sampling only if we suspected an uptake. There is a suggestion on the table that we establish a reference baseline, especially for workers who intend to work in Alpha Level 3 areas. The proposal goes like this…if we have work planned in an Alpha Level 3 area, we obtain urine samples prior to the job. If the job doesn’t go so well and the worker in the Alpha Level 3 area has a suspected intake, we would send the before and after samples out for analysis. If the job goes well and there is no suspected intake, we dump the baseline sample. What is the policy at your site? I’m especially interested in hearing from Bruce (SEN 286) and Oconee (OE31303/32020). Thanks, Bryan Bryan S. Pell R.E. Ginna Nuclear Power Plant Senior Plant Health Physicist (585) 771-3804 [email protected] P Please consider the environment before printing >>> This e-mail and any attachments are confidential, may contain legal, >>> professional or other privileged information, and are intended solely for >>> the addressee. If you are not the intended recipient, do not use the >>> information in this e-mail in any way, delete this e-mail and notify the >>> sender. CEG-IP1 --- NOTICE --- This message is for the designated recipient only and may contain confidential, privileged or proprietary information. If you have received it in error, please notify the sender immediately and delete the original and any copy or printout. Unintended recipients are prohibited from making any other use of this e-mail. Although we have taken reasonable precautions to ensure no viruses are present in this e-mail, we accept no liability for any loss or damage arising from the use of this e-mail or attachments, or for any delay or errors or omissions in the contents which result from e-mail transmission.
