Ginna uses Cs-137 for gamma monitor calibration and source checks. This is in line with Exelon standard practices.
We used mixed Cs-137/Co-60 sources to perform our portal monitor sensitivity study in an attempt to better replicate our plant mixture. Stephen J Holmes, CHP, PE Sr Radiation Protection Technical Specialist [email protected]<mailto:[email protected]> 315-791-3577 (desk) 845-476-0796 (mobile) [cid:[email protected]] R.E. Ginna Nuclear Power Plant 1503 Lake Rd Ontario, NY 14519 From: Schlise, Larry D [mailto:[email protected]] Sent: Thursday, December 17, 2015 12:07 PM To: [email protected] Cc: [email protected]; Byrum, William F Subject: [EXTERNAL] [powernet] Gamma sensitive contamination monitor optimization and calibration practices Duke Energy is requesting information on your sites' practices for calibration and optimization of gamma sensitive portal monitors and article monitors. Duke Energy's EnRad Laboratories is beginning the process of standardizing the calibration and optimization of our gamma sensitive portal and article monitors in our six site, eleven unit nuclear fleet as an initiative following the merger of Duke Energy and Progress Energy. We are requesting answers to the following questions: 1. What is your site's calibration source isotope for gamma sensitive contamination monitors? 2. What is your site's gamma sensitive contamination monitor optimization source isotope? 3. What is the basis for the calibration and optimization source isotopes selected? a. Manufacturer recommendation or other? 4. Do you use mixed isotope sources for calibration and/or optimization of gamma sensitive contamination monitors? Larry Schlise RP Scientist, EnRad Labs Duke Energy [EnRad Logo.jpg] 13339 Hagers Ferry Rd Mail Stop MG03A2 Huntersville, NC 28078 980-875-5395 (Office) 704-787-3401 (Mobile) This Email message and any attachment may contain information that is proprietary, legally privileged, confidential and/or subject to copyright belonging to Exelon Corporation or its affiliates ("Exelon"). This Email is intended solely for the use of the person(s) to which it is addressed. If you are not an intended recipient, or the employee or agent responsible for delivery of this Email to the intended recipient(s), you are hereby notified that any dissemination, distribution or copying of this Email is strictly prohibited. If you have received this message in error, please immediately notify the sender and permanently delete this Email and any copies. Exelon policies expressly prohibit employees from making defamatory or offensive statements and infringing any copyright or any other legal right by Email communication. Exelon will not accept any liability in respect of such communications. -EXCIP
