For Surry: If we drop more than one at power, we trip as well. If we drop only one, our TS allow us to look at hot channel factors further and (if we meet some conditions) continue operating with a dropped rod (happened in 2006 for 19 days). If a rod is dropped during a startup or physics testing, the reactor will be tripped. Following recovery of a dropped rod, the recovery is considered complete when the follow up test to verify that the rod is working properly is complete. So it wold depend on the failure.
Adina LaFrance
It's a healthy thing now and then to hang a question mark on the things you have long taken for granted. -Betrand Russell
Nuclear Analysis & Fuel Reactor Engineer Surry Power Station Email: Adina.K.LaFrance@Dom.com Phone: 757-365-2658 Pager #: 4290
"WILLETT, JOSEPH E" jwillett@oppd.com Sent by: pwrrm@retaqs.com 11/04/2008 09:02 AM Please respond to PWR Reactivity Management pwrrm@retaqs.com
To pwrrm@retaqs.com cc
Subject [Pwrrm] Definition of When Startup is Complete
FCS has two requirements regarding a dropped rod. First, if we drop more than one rod at power, we trip the reactor. Second, if we drop a single rod during startup, we trip the reactor. What we don't have is a definition of when startup is considered complete, with regards to a dropped rod. Do other plants have similar requirements and do you have a definition of when startup is complete with regards to a dropped rod? J. E. Willett ---------------------------------------------------- Joseph E. Willett, P.E. Principal Reactor Engineer-Fuel Nuclear Operations Division E-mail: jwillett@oppd.com Omaha Public Power District Phone: (402) 533-7213 Fort Calhoun Station Pager: (402) 561-3899 9610 Power Lane FAX: (402) 533-6747 Blair, NE 68008 Mail Station: FC-1-1 Plant ---------------------------------------------------- --------
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