Palo Verde provides the following response: At Palo Verde we procedurally require personnel to wear their TLD and electronic dosimeter "in close proximity" on their whole body, e.g., trunk. We emphasis this in our RWT training and expect our RP staff to reinforce in the field. One of the areas of concern that we have with this is lost dosimetry so we emphasis how they the attach their dosimetry (usually worn on a lanyard). With respect to a geometry card we do not use such a device. When working in a contaminated area the TLD and electronic dosimeter are placed in a Whirlpak for contamination control purposes and worn in the pocket of the protective clothing to ensure self-monitoring of dose can be done. If working areas that have dose gradients, we can direct them to relocate their dosimetry to an area of the whole body that will be incurring the highest whole body dose and the TLD and electronic dosimeter will be place there; however, if self-monitoring of dose is hampered we will increase radiological oversight and consider the use of remote monitoring equipment (telemetry).
Seth. ********************************************************************** Seth J. Kanter, CHP, RPT Sr. Health Physicist Palo Verde Nuclear Generating Station Mail Sta. 7397 5801 S. Wintersburg Rd. Tonopah, AZ 85354 Phone (623) 393-3130 Fax (623) 393-2487 Unless otherwise noted, all opinions are my own Liviu Librescu ********************************************************************** From: [email protected] [mailto:[email protected]] On Behalf Of Egert, Glenn W. Sent: Monday, September 13, 2010 3:35 PM To: [email protected] Cc: Shepherd, R Mark Subject: Powernet: TLD and ED worn in close proximity Columbia requests the following information. 1) Do you use a device such as a geometry card or bag to ensure the TLD and electronic dosimeter (ED) are worn in close proximity on the worker? 2) On what types of jobs do you require the use of this device, e.g., only contaminated areas where PCs (or lab coats) are worn, work involving dose gradients, every time an ED is worn, etc.? Thank you in advance. Glenn W. Egert Radiological Support, Dosimetry Columbia Generating Station Energy Northwest (509) 377-4418 [email protected]<mailto:[email protected]> Email Firewall made the following annotations --------------------------------------------------------------------- --- 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. ---------------------------------------------------------------------
