Eric, TVA Sequoyah does the following:
From: owner-power...@hps1.org [mailto:owner-power...@hps1.org] On Behalf Of Eaton, Eric Sent: Tuesday, July 02, 2013 2:27 PM To: 'powernet@hps1.org' Subject: Powernet: Portal monitor Greetings all... After attending the Canberra User's Group Meeting last week, it came to light that some facilities perform the Daily Source Check on their Portal Monitors differently. Thus the basis for my question... Does your facility source check each detector of your portal monitor using the alarm test function (like the Argos or PM-7)? We source check every detector daily Or Do you source check your portal monitor by placing the source in the middle of the monitor using the alarm test function? We use a jig to position the sources over each detector on the ARGOS-5AB monitors using the test function. Or Do you source check your portal monitor by having a technician step into the monitor (in normal) with the source on their person? On the GEM-5 the technician holds the source in close proximity to their body and passes through multiple times to test and verify each detector. Recently someone pointed out that we may not be following ANSI N323 because the standard speaks of using a repeatable geometry. So we may be changing this process and start using a jig to assure a repeatable geometry for this test. Or, something else? Thanks in advance for your responses... Eric A. Eaton Ginna Station R.P. Technician This e-mail and any attachments are confidential, may contain legal, professional or other privileged information, and are intended solely for the addressee. If you are not the intended recipient, do not use the information in this e-mail in any way, delete this e-mail and notify the sender. -EXCIP
