Eu-152 would be the preferred source. HPIG energy response is slightly non-linear so the lower energies from Eu-152 are advantageous. Also, the lower energy peaks provide resolution info that can be useful in recognizing signal noise.
Jim Jim Key Key Solutions, Inc. 4350 Big Springs Road, Lebanon, TN 37090 615-453-3712 (Office) <mailto:[email protected]> [email protected] 413-403-9805 (e-Fax) From: Powernet <[email protected]> On Behalf Of Holmes, Stephen J:(GenCo-Nuc) via Powernet Sent: Wednesday, January 9, 2019 5:35 AM To: [email protected] Cc: Holmes, Stephen J:(GenCo-Nuc) <[email protected]> Subject: [Powernet] Benchmark - WBC Check Source This benchmark is primarily for those of you using a Germanium based whole body counter.I welcome feedback from everyone, however Questions (with Ginna info) 1. What WBC system are you using? Mirion/Canberra Accuscan-II with dual HPGe detectors 2. What nuclides/peaks are you using to perform your routine QC checks? Cs-137/Co-60 source. The 662 and 1332 peaks are used for QCC. We are in need of a new source and are considering Eu-152 (122 keV and 1408 keV peaks) 3. Have you changed this source in recent history? If so, why and did you encounter any issues when you changed sources? No, but Mirion has recommended we consider changing to Eu-152 4. Have you been challenged by a regulator/auditor on the source you are choosing to use? We have not. Benefit of the Co-60/Cs-137 mixture is that we are directly validating two key nuclides each time we do a QC check. Benefit of Eu-152 is ability to validate the lower end of the energy spectrum during QC checks. Eu-152 will also have a longer working life. Thanks Stephen J Holmes, CHP Rad Prot Tech Support Manager <mailto:[email protected]> [email protected] 315-791-3577 | 845-476-0796 (mobile) R.E. Ginna Nuclear Power Plant 1503 Lake Rd Ontario, NY 14519 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
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