Hi All, I am retired now, but Diablo Canyon had both an HPGe and NaI body counter. The HPGe counter has been QC'ed with a Eu-152 source since if was purchased in the mid-90's. My personal opinion is that a Co-60/Cs-137 source is really not sufficiently challenging to a HPGe system.
Thanks, Linda Sewell, CHP Diablo Canyon - Retired Powernet List Administrator On Wed, Jan 9, 2019 at 3:36 AM Holmes, Stephen J:(GenCo-Nuc) via Powernet < [email protected]> wrote: > 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 > > 1. 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) > > 1. 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 > > 1. 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 > > [email protected] > > 315-791-3577 | 845-476-0796 (mobile) > > > > [image: cid:[email protected]] > > 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 > _______________________________________________ > Powernet mailing list > [email protected] > http://hpspowernet.org/mailman/listinfo/powernet_hpspowernet.org >
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