Reply from Crystal River: The WBC calibrations are performed annually in house and are reviewed by the RP specialist and supervision. Daily QC checks are performed with a mixed Cs-137/Co-60 source when the WBC is in service. Pass/fail results are automatically printed out. We also participate in the Eckert & Ziegler Analytics quarterly QC program where we receive a source of unknown activity and an unknown radionuclide mixture. The blind source is counted in our phantom, results reported to Analytics, and our pass/fail agreement is reported back to us.
Chuck Burtoff Radiation Protection Crystal River 3 Power Plant 15760 W. Powerline St. Crystal River, FL 34428 352-795-6486 x3012 From: [email protected] [mailto:[email protected]] On Behalf Of ROSSER, FREDERICK W Sent: Monday, August 30, 2010 3:46 PM To: [email protected] Subject: Powernet: QA of WBC calibration We were recently asked how we perform a QA of our WBC calibration. We use a vendor to perform the calibration and the documentation is complete and has never been challenged, so I was stumped. We do QC checks on the daily performance to document the daily performance vs. the cal. What do you do for WBC calibration QA reviews? Especially if you use a vendor to perform the calibration. Fred W. Rosser R. P. Supervisor Grand Gulf Nuclear Station 601 437-6571
