Palo Verde uses the PM-7 portal monitor at the exit of each unit RCA and at the protected area exit; however, this is done in conjunction with a robust whole body counting program. We perform in-vivo WBCs on an annual, for cause, initial employment, and termination basis. The portal monitors provide indication of potential intakes and the presence of photon emitting contamination that may have escaped detection in our beta sensitive contamination monitors. In this regard we use the portal monitor as a passive monitor; however, if the phrase "implementing passive monitoring" implies the elimination or reduction of or routine whole body counting, PV has no intention of changing our program. We have done extensive field testing that has shown activity up to 50,000 dpm of internally deposited activity or surface contamination is less than ideal body location can be difficult to detect with the PM-7. Passive monitoring at your RCA egress point should be a part of good field assessments (air samples, contamination control, etc) along with a rigorous WBC program
From: [email protected] [mailto:[email protected]] On Behalf Of Creamer, Charles E Sent: Wednesday, July 20, 2011 8:27 PM To: [email protected] Cc: Cowan, Steven Roger Subject: Powernet: PM-7 and passive monitoring Browns Ferry is looking at implementing passive monitoring. We currently use the PM-7 monitors. 1) Do you use PM-7s for passive monitoring and 2) If you do, could you provide us with a copy of your procedure for calibration and response checks. ___________________________ Chuck Creamer Charles E. Creamer Health Physicist Tennessee Valley Authority Browns Ferry Nuclear Plant P.O. Box 2000 (Mail Stop NAB-1G-BFN) Decatur, Al. 35609-2000 Phone: 256-729-2983 Fax: 256-729-3101 Pager: 1-800-323-4853, pin 30-053 mailto:[email protected] --- NOTICE --- This message is for the designated recipient only and may contain confidential, privileged or proprietary information. If you have received it in error, please notify the sender immediately and delete the original and any copy or printout. Unintended recipients are prohibited from making any other use of this e-mail. Although we have taken reasonable precautions to ensure no viruses are present in this e-mail, we accept no liability for any loss or damage arising from the use of this e-mail or attachments, or for any delay or errors or omissions in the contents which result from e-mail transmission.
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