Has anybody had to change their ED correction bias since adding the DMC-2000S version 4 to their electronic dosimeter population? If you use the DMC-2000S version 4 and also use / or have used version 3.x, can you answer the questions below? Thanks! Recently Seabrook place the DMC-2000S version 4 into service. This version introduced changes to the device angular and energy response, as compared to earlier versions (MIRION Customer Notification dated 12/2013). Since we started using the version 4, higher than expected ED dose readings have been seen for certain jobs, such as S/G Nozzle Dam work, Fuel Moves, and Rx Head Assembly/Disassembly. We believe it's from the higher angular and energy response, and would like to know how others have dealt with the change. Do you use the DMC-2000S version 4? Do you use the DMC-2000S version 4 with previous DMC-2000S versions? Have you seen a difference in response between version 3.x and version 4 of the DMC-2000s? Do you use a different bias factor(s) for each version? Do you use a different bias factor(s) for different jobs? What bias factor(s) do you use for the version 3.x and the version 4?
Thanks again for your help, and I hope everyone has a good holiday season. Marc Marc Nadeau NextEra Energy Seabrook Radiation Protection Phone: 603-773-7815 Fax: (603)773-7303
