Davis Besse Response: 1. 3500 dpm/100 cm2 2. Yes, scaling factors and nuclide plant mix. 3. Smear from Decay Heat pump skid made with mylar cover and in a zip lock bag per INPO instructions. Smear(s) at approximately 4,500 dpm/100 cm2 using a Frisker with HP-210. 4. PCM-2 - we are in the process of changing to iPCM 12 or Argos.
June L. Scott [email protected] Phone: 419-321-8555 Cell: 419-367-6651 Davis Besse Nuclear Power Station 5501 N State Route 2 Oak Harbor, Oh 43449 <harryl.mil...@ex eloncorp.com> Sent by: To owner-power...@hp <[email protected]> s1.org cc <[email protected]> Subject 09/13/2010 12:40 Powernet: Personnel contamination PM monitor (PCM) alarm setpoints Please respond to [email protected] Braidwood would like to benchmark the industry with the following questions relating to personnel contamination monitor (PCM) alarm setpoints and difficult-to-detect isotopes. 1. What is your beta alarm setpoint for personnel contamination monitors at your RCA egresses? 2. Does your alarm setpoint take into consideration, the presence of difficult-to-detects in your plant mix? a. If yes, how or what methodology did you used to arrive at your new beta alarm setpoint? 3. How did you characterize your plant mix smear(s) in preparation for the INPO performance evaluation with regard to difficult-to-detect isotopes? a. For example: · If your beta alarm setpoint was reduced to 3,750 dpm/100 cm2 due to the presence of difficult-to-detect isotopes (25% of waste stream), then at what strength did you make your INPO performance evaluation smear(s)? o For example: Did you make your smear(s) equal to 3,750 dpm/100 cm2 (reduced 25% due to difficult-to-detect isotopes) or did you make your smear(s) at 5,000 dpm/100 cm2? · Did you use a GM to characterize the strength of your beta smear? If not, then what instrument did you use to ensure the strength of your smear is at ±20% of your alarm setpoint? 4. Lastly, what beta model PCM does your station use at your main RCA egress? Thank you very much for your time. Exelon Nuclear Hieu T. Nguyen RP Technical Work:(815) 417-2731 ************************************************** This e-mail and any of its attachments may contain Exelon Corporation proprietary information, which is privileged, confidential, or subject to copyright belonging to the Exelon Corporation family of Companies. This e-mail is intended solely for the use of the individual or entity to which it is addressed. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution, copying, or action taken in relation to the contents of and attachments to this e-mail is strictly prohibited and may be unlawful. If you have received this e-mail in error, please notify the sender immediately and permanently delete the original and any copy of this e-mail and any printout. Thank You. ************************************************** ----------------------------------------- The information contained in this message is intended only for the personal and confidential use of the recipient(s) named above. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately, and delete the original message. ----------------------------------- Powernet - a service of the Health Physics Society Power Reactor Section Powernet archives at http://www.mail-archive.com/[email protected]/ Reply to: [email protected] If Questions, contact Mike Russell, CHP at [email protected]
