Rick, TVA Sequoyah Plant answers below: From: Treinen, Rick [mailto:[email protected]] Sent: Tuesday, December 08, 2015 7:18 PM To: [email protected] Subject: [powernet] Irradiator Vendor PM Frequency
TVA External Message. Please use caution when opening. Hi All, For those who have and operate Shepherd calibrators/irradiators such as Model 89, 81, 78, etc. or Hopewell units: We have two JL Shepherd Model 89 irradiators on our site. These are used to perform source response checks on dose rate instruments. No calibrations are performed with these irradiators at our facility. 1. How often do you do preventive maintenance on your irradiators? Annually, Bi-annually, 5 years, when they're broke? We perform preventative maintenance on our Model 89 when needed, typically cleaning and lamp changes. We refer to this as "routine maintenance." See NUREG-1556 volume 5 for the definition. 2. Is it done in-house or by a vendor? Most routine maintenance is performed in-house using the JL Shepherd checklist. Non-routine maintenance is performed by a vendor, individuals or companies authorized to conduct repairs by the Commission. Thanks! Rick If you have any other questions, please feel free to contact me. Kind regards, Jim Rolph 423-843-8115 --- Rick Treinen Radiation Protection Engineer PG&E / DCPP / RP BLDG 104 / 216 / D 805.545.6481 (O) 805.769.8001 (C)
