Response from Columbia:
We have Argos 5 A/B and IPM 8s. 1) ~4 cm (Approx. 1.25 inch) for body, shoulder, shoe top. Foot ~0.4 cm (Approx. 1/8 in) from grill. Hand ~0.4 cm from detector screen. These distances are representative of distances of the surface being monitored, and result in efficiencies of ~9.5 to 11.5% usually 10% on average. 2) Tc99 and approx. 150,000 dpm. We recently switch from Co60 and efficiencies were nearly identical. Co60 being only slightly more (0.5%) - likely because a little higher avg./max. beta energies. Michael Kinmark HP Staff Advisor III Radiological Support Columbia Generating Station 509-377-2091 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Monday, April 29, 2013 5:32 AM To: [email protected] Subject: Powernet: Calibration of PCMs Hello all, Davis Besse would appreciate answers to the following questions regarding personnel contamination monitors: 1. At what distance from the detector do you calibrate your PCMs? (contact, 1 inch, 3 inches) 2. What isotope and activity source do you use for calibration? Thank you in advance! Claudia L. Sacha RP Services Supervisor [email protected] Phone: 419-321-7303 Davis Besse Nuclear Power Station ----------------------------------------- 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] ----------------------------------- 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]
