Columbia Generating Station is using the Argos-5 A/B Whole Body Contamination Monitor (WBCM). Prior to implementing the Argos WBCM our frequency of WBCM alarms was very high in the fall and winter months due to increased Radon levels. Supplementing the WBCM's, all alarms suspected of being attributed to Radon are evaluated by HP Technicians using the Nuclear Enterprise CM-11 frisker. HP Technicians follow procedural guidance for evaluating and releasing individuals suspected of alarming the WBCM due to Radon or Noble Gas Progeny activity. Feel free to call or send me an e-mail if you have any further questions.
Ray Thomson Health Physics Staff Advisor Columbia Generating Station [email protected] Office, 509-377-8273 From: [email protected] [mailto:[email protected]] On Behalf Of Rouse, Raymond Lawrence Sent: Tuesday, December 06, 2011 6:58 AM To: [email protected] Cc: Grim, Kenneth R Subject: Powernet: Radon problems Recently our plant staff had a hard time exiting the protected area, alarming the PM-7's. Conditions: After weeks of no rain we experience two straight days of rain on the second day the temperature dropped significantly. We took water samples from standing puddles and found radon products. So the perfect radon storm, encapsulation, temperature inversion, displacement and entrapment. How does your station deal with radon problems? Raymond Rouse Watts Bar
