Columbia's Response below: TEDE ALARA evaluations should be performed when work will take place under the following radiological conditions: a. The work area is an Airborne Radioactivity Area (>0.3 DAC). b. Loose surface contamination levels in excess of 500,000 dpm/100 cm2 beta-gamma or in excess of 200 dpm/100 cm2 alpha. c. The work activities could cause airborne radioactivity concentrations to exceed 0.3 DAC. d. The use of respiratory protection equipment is considered for protection against contamination.
Ray Thomson Health Physics Craft Supervisor Coulmbia Generating Station [email protected] Office, 509-377-8273 From: [email protected] [mailto:[email protected]] On Behalf Of Beckham, Bob Sent: Tuesday, January 15, 2013 5:40 AM To: [email protected] Subject: Powernet: TEDE/ALARA Evaluation Duke Energy would appreciate any information other utilities can provide on the following: Duke fleet procedure calls for TEDE/ALARA evaluation if weighted DAC-hours are expected to result in ≥ 4 DAC-hours (10 mrem CEDE) per person. Anyone using different criteria, methods, values? Bob Beckham | Scientist | Fleet Scientific Services | Radiation Protection | Duke Energy Carolinas, LLC 526 S. Church St. | Mail Stop EC07F | Charlotte, NC 28202 | 704-382-6713 office | 704-453-6002 cell
