Mike,
For Seabrook,
No experience with a 0 MTC at power. We design for 0 MTC at HZP.
Regarding your NIS, if you do a good scaling calc pre-strartup, you should be in good shape. The wild card will be the removal of the Hf inserts. In our early days we had currents of 500-600 ua. Now we run 150-200 ua. We rescale NIs pre-startup using our clac data, do a tune-up at 50% (we are looking to move this 30%) and do the final rescale at 100%. We have not had any over-ranging problems but on occasion we need to adjust the coarse gain pot to do the calorimetric adjustment.
Paul Gurney
Michael_Fanguy@do m.com To: pwrrm@keffective.com Sent by: cc: pwrrm-bounces@ret Subject: [Pwrrm] IFBA Implementation aqs.com
03/24/2006 08:42 AM Please respond to "PWR Reactivity Management"
Hello to all,
I'm looking for some OE on IFBA implementation and have the following questions.
1. Has anyone had experience with a 0 MTC core? How did it affect normal ops at full power or transients? 2. We'll be loading more fresh fuel near the periphery because of IFBA and will be removing Hafnium inserts in front of our NIs, so we're expecting increases in our NI signals. Has anyone had problems with NIs being over-ranged or not being able to adjust NIs to the calorimetric of this type of activity?
Thanks for any help you can provide.
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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