Braidwood Response: The in plant ventilation charcoal filters do not absorb enough radioactive gasses to have any dose rates. We are abandoning our system for that reason. When we have had failed fuel (last time 2006) we used localized HEPA with charcoal and could see very high dose rates. If not changed out frequently enough they have gotten to 300-500 mrem/hr. But the in plant system charcoal never sees anything.
From: [email protected] [mailto:[email protected]] On Behalf Of Wilmot, Aaron Sent: Wednesday, October 01, 2014 6:49 AM To: [email protected] Cc: Keller, Terry M.; Lloyd, Timothy M. Subject: Powernet: OE Related to Containment Air Filter Dose Rates Hello, Westinghouse Electric Company is seeking the following information and any related input from operating plants: 1.) What on-contact dose rates are typically exhibited by containment air filters at your plant or site? 2.) Does your plant or site have a dose rate requirement for filter change-out, or are filters changed out due to other requirements or criteria (such as DP)? 3.) Does your plant or site have any historical dose rate measurement information you would be willing to share (for example, dose rate measurements from the filter during cycles with fuel failure)? Any feedback you can provide is greatly appreciated. Thank you in advance, Aaron Wilmot, MS, CHP AP1000 Plant Analysis and Integration Westinghouse Electric Company Suite 163 1000 Westinghouse Drive Cranberry Township, PA 16066, USA Phone: +1 (412) 374-3509 Fax: +1 (412) 374-2510 Email: [email protected]<mailto:[email protected]> Home Page: www.westinghousenuclear.com ________________________________ This e-mail may contain proprietary information of the sending organization. Any unauthorized or improper disclosure, copying, distribution, or use of the contents of this e-mail and attached document(s) is prohibited. The information contained in this e-mail and attached document(s) is intended only for the personal and private use of the recipient(s) named above. If you have received this communication in error, please notify the sender immediately by email and delete the original e-mail and attached document(s). This e-mail and any attachments are confidential, may contain legal, professional or other privileged information, and are intended solely for the addressee. If you are not the intended recipient, do not use the information in this e-mail in any way, delete this e-mail and notify the sender. -EXCIP
