We normally manually trip the reactor between 15 and 20%, will likely be lower since we uprated by more than 8% this cycle. When we shutdown for Hurricane Katrina, we tripped the reactor and turbine at about 10%.

Clint Alday

-----Original Message----- From: respvr-bounces@retaqs.com [mailto:respvr-bounces@retaqs.com] On Behalf Of POHL, MATTHEW H Sent: Thursday, February 02, 2006 8:42 AM To: respvr@keffective.com Subject: [Respvr] Manual Trip going into Refueling Outage

Fort Calhoun is considering performing a manual reactor trip at 20% power (Turbine Trip is actually at 15%) when coming down for our fall outage... This would save us approximately 2 to 4 hours of critical path.

If you currently perform (or can perform) this type of technique or have/had experience with this, please provide me a point of contact or any related information or opinions.

Thank you in advance,

Matt Pohl

Principal Reactor Engineer - Operations

Fort Calhoun Nuclear Station

(402)533-6820 (work)

(402)561-3864 (pager)

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