Non-Refueling: first dilute the RCS to the estimated critical rod position, then withdraw shutdown banks, then withdraw control rods to critical. (Your second option)

Refueling: establish a boron concentration to perform an ARO CEA drop time (scram time) test and withdraw rods using 1/M to do that test. We then withdraw back to the last group (4 rods) inserted to 75" (50%) and dilute to critical.

Clint Alday Waterford 3

-----Original Message----- From: respvr-bounces@retaqs.com [mailto:respvr-bounces@retaqs.com] On Behalf Of Hugh_E_McKenney@dom.com Sent: Thursday, May 18, 2006 8:19 AM To: respvr@retaqs.com Subject: [Respvr] Start Up sequence

RE Supervisors,

Does your plant normally start up (non RFO) by withdrawing shutdown banks first, then diluting the RCS to the estimated critical rod position (Cb) then withdrawing control rods to critical?

or

Does your plant normally start up by first diluting the RCS to the estimated critical rod position (Cb), then withdrawing shutdown banks, then withdrawing control rods to critical?

Thanks

Hugh McKenney Dominion Resources Services, Inc. Reactor Engineering Supervisor Phone: 8-759-2359 or 860 447-1791 x2359 Email: Hugh_E_McKenney@Dom.com

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