Palo Verde uses electroplated Cs-137 source and backscatter is accounted for in the source emission rate.
From: [email protected] [mailto:[email protected]] On Behalf Of Barber, Jerry Sent: Tuesday, February 01, 2011 4:38 AM To: '[email protected]' Subject: Powernet: RE: Geometry/type of Tc-99 sources used calibrate/source check Personnel Contamination Monitors Do you use electroplated sources, and if so, do you account for backscatter? Seems to me that if you calibrate and source check with electroplated sources you would fine. Is that what you do or do you use the plastic large area Cs sources with mylar covering that flakes off over time? From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, January 27, 2011 10:42 AM To: [email protected] Subject: Powernet: RE: Geometry/type of Tc-99 sources used calibrate/source check Personnel Contamination Monitors Palo Verde uses Cs-137 From: [email protected] [mailto:[email protected]] On Behalf Of Barber, Jerry Sent: Thursday, January 27, 2011 7:48 AM To: '[email protected]' Subject: Powernet: Geometry/type of Tc-99 sources used calibrate/source check Personnel Contamination Monitors For plants that use Tc-99 for calibration/source check for their personnel contamination monitors, Robinson would like to know: Does your site use a Large Area plastic/mylar covered Tc-99 source to calibrate your personnel contamination monitors? Does your site use an electroplated Tc-99 source to calibrate your personnel contamination monitors? If yes, do you account for backscatter or have you verified that it is insignificant? Does your site use Large Area Tc-99 sources (e.g., 100 cm^2) to calibrate your personnel contamination monitor? If not, what size source do you use? Does your site use an electroplated Tc-99 source to perform daily source checks for your personnel contamination monitors? Does your site use a Large Area Tc-99 source to perform daily source checks? --- 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.
