Sequoyah uses 2 of 4 RCPs for crud burst clean up. We typically run the RCPs for 12 hours after inducing the crud burst. We've been successful getting activity down to 0.1 - 0.2 range before securing RCPs and cleaning up the rest of the way on shutdown cooling. I have a scheduled activity to evaluate the activity prior to securing the last RCP - if we're > 0.2 we keep the last RCP running.
Joel Armstrong -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, November 10, 2010 3:28 PM To: [email protected] Subject: Powernet: Use of RCPs during Shutdown clean-up Davis-Besse is a B&W 2 loop pwr. The station has never used its reactor coolant pumps during shutdown evolutions. We are considering it now. How many pwrs utilize rcps during crud burst clean-up. activities Douglas L. Noble Manager - Radiation Protection Davis-Besse Nuclear Power Station (419) 321-7780 office (419) 304-0068 cell ----------------------------------------- The information contained in this message is intended only for the personal and confidential use of the recipient(s) named above. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately, and delete the original message. ----------------------------------- Powernet - a service of the Health Physics Society Power Reactor Section Powernet archives at http://www.mail-archive.com/[email protected]/ Reply to: [email protected] If Questions, contact Mike Russell, CHP at [email protected] ----------------------------------- Powernet - a service of the Health Physics Society Power Reactor Section Powernet archives at http://www.mail-archive.com/[email protected]/ Reply to: [email protected] If Questions, contact Mike Russell, CHP at [email protected]
