Hi everyone,

We recently did our quarterly rod testing on Unit 1 and had some issue. First of all, we insert each bank 12 steps, then withdraw to 235 steps, reset the group demand counters to 230, then insert to our full out position. Following this test, delta flux trended up and peaked about 0.6-07% higher than the start. Tavg also was about .2 deg higher as well. The delta flux response was seen fairly equally on all the NIs and a flux map confirmed incore AO was close to excore. We are not used to seeing this at Surry. I am postulating that a group of rods was partially (~ 2 steps) inserted or that this may possibly be CIPS? Has anyone experience this? Any feedback would be appreciated.

Michael J. Fanguy Nuclear Analysis & Fuel Lead Reactor Engineer Surry Power Station Email: Michael_Fanguy@Dom.com Phone: 757-365-2155 Pager #: 3453

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