John, Braidwood response:
Several reasons for lower cavity activity. RCS activity at flood up has been below 0.02 mCi/cc (not 0.05 as EPRI suggests) RWST has been about 7E-7 mCi/cc before flood up to further dilute. Upcoming outage we plan on being 9E-8 which is phenomenal. Put in about 6 gallons hydrogen peroxide in cavity before drain down. Use hydrogen peroxide for cavity decon These and other techniques have been used and discussed at recent PWR RP/Alara Association meetings. Great opportunity to benchmark industry and directly ask your industry peers all any questions you have concerning improving Alara programs. From: [email protected] [mailto:[email protected]] On Behalf Of John Sukosky (Generation - 3) Sent: Friday, March 07, 2014 12:18 PM To: [email protected] Subject: Powernet: Do You Allow Workers to Enter Cavity During Rx Head Set Without Respiratory Protection? It is probably easier for you to reply via email, but I would enjoy talking with you. When we drain the cavity following refueling we typically find contamination levels exceeding 1,000,000 dpm/100 cm2 and multiple spots >1 rem/hour on contact. We, therefore, prescribe plastic suits and PAPHs for an HP and SRO to enter the cavity during reactor head set. I was challenged to determine why other plants experience contamination levels < 200,000 dpm/100 cm2 and are able to allow entry into the cavity without respiratory protection during reactor head set. 1. What are your typical radiological conditions in the cavity during reactor head set at your station (e.g., contamination levels) 2. What are your station’s requirements for respiratory protection and protective clothing for workers in the cavity during reactor head set? 3. Also, is there feasibly anything that can be done to improve Surry’s radiological conditions in the cavity during reactor head set? We do not have polished cavity surfaces and do not perform ultrasonic cleaning of spent fuel. A quick response would be greatly appreciated. Jim Keithley Sr. Health Physicist Surry Power Station (757) 365-2069 (757) 365-0536 [email protected]<mailto:[email protected]> ________________________________ CONFIDENTIALITY NOTICE: This electronic message contains information which may be legally confidential and or privileged and does not in any case represent a firm ENERGY COMMODITY bid or offer relating thereto which binds the sender without an additional express written confirmation to that effect. The information is intended solely for the individual or entity named above and access by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have received this electronic transmission in error, please reply immediately to the sender that you have received the message in error, and delete it. Thank you. 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
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