From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Tuesday, December 20, 2011 1:55 PM To: [email protected] Subject: Powernet: Tracking electronic dosimeter dose to tenths?
San Onofre currently tracks electronic dosimeter dose to integer mrem (a deliberate decision when we implemented the MGPI DMC-2000S dosimeters). We understand that some plants track dose to tenths of an mrem. Reportedly, there is an ALARA benefit for this additional precision. I have two questions: How many plants/fleets are tracking ED dose to tenths of a mrem? Duke Energy ED dose is displayed in tenths of mrem. How does such precision impact ALARA performance? In other words, what worker behaviors change when a worker sees 4.4 mrem instead of 4, or 4.7 mrem instead of 5? Not much benefit to ALARA performance, however it does provide some latitude to the worker in being able to leave an area prior to dose / dose rate alarms. Thanks and Happy Holidays from sunny (today) California, Eric Happy holidays to you, Eric and to all from not so sunny (today) North Carolina. Eric M. Goldin, CHP Southern California Edison <[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]
