ML070110441

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Additional Draft RAI Re. Proposed Amendment
ML070110441
Person / Time
Site: Cook American Electric Power icon.png
Issue date: 01/11/2007
From: Tam P
NRC/NRR/ADRO/DORL/LPLIII-1
To: Scarpello M, Simpson S, Vasey B
American Electric Power Co
References
TAC MD3161
Download: ML070110441 (2)


Text

From: Peter Tam To: Scarpello, Michael; Simpson, Sue; Vasey, Bob Date: 01/11/2007 11:42:18 AM

Subject:

D.C. Cook: Additional Draft RAI re. Proposed Amendment (TAC MD3161)

Sue:

This refers to your application for amendment dated 9/15/06 for D.C. Cook Unit 2.

As you requested, our I&C reviewer Hukam Garg wrote out the 2 questions that he verbally stated in the conference call today (1/11/07):

(1) Setpoint Calculation Methodology: Provide documentation (including sample calculations) of the methodology used for establishing the limiting setpoint (or NSP) and the limiting acceptable values for the as-found and as-left setpoints as measured in periodic surveillance testing as described below. Indicate the related analyutical limits and other limiting design values (and the sources of these values) for the setpoint.

(2) This setpoint has been determined to be not SL-related by the licensee. Describe the measures to be taken to ensure that the associated instrument channel is capable of performing its specified safety functions in accordance with applicable design requirements and associated analyses. Include in your discussion information on the controls you employ to ensure that the as-left trip setting after completion of periodic surveillance is consistent with your setpoint methodology. Also, discuss the plant corrective action processes (including plant procedures) for restoring channels to operable status when channels are determined to be "inoperable" or "operable but degraded." If the controls are located in a document other than the TS (e.g., plant test procedure), describe how it is ensured that the control will be implemented.

(3) Discuss any interface between the reactor trip on low turbine oil pressure and programmable logic controller used for turbine control. If these are interfaces between the two, provide justification for the acceptability of these interfaces.

Peter S. Tam, Senior Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation e-mail: pst@nrc.gov Tel.: 301-415-1451 CC: Garg, Hukam; Jin-Sien Guo; Schulten, Carl S Mail Envelope Properties (45A668EA.17E : 12 : 35330)

Subject:

D.C. Cook: Additional Draft RAI re. Proposed Amendment (TAC MD3161)

Creation Date 01/11/2007 11:42:18 AM From: Peter Tam Created By: PST@nrc.gov Recipients Action Date & Time

aep.com Transferred 01/11/2007 11:42:51 AM mkscarpello (Michael Scarpello) rgvasey (Bob Vasey) sdsimpson (Sue Simpson) nrc.gov OWGWPO02.HQGWDO01 Delivered 01/11/2007 11:42:23 AM HCG CC (Hukam Garg) Opened 01/11/2007 1:07:36 PM JSG CC (Jin-Sien Guo) nrc.gov TWGWPO02.HQGWDO01 Delivered 01/11/2007 11:42:19 AM CSS1 CC (Carl S Schulten) Opened 01/11/2007 11:48:57 AM Post Office Delivered Route aep.com OWGWPO02.HQGWDO01 01/11/2007 11:42:23 AM nrc.gov TWGWPO02.HQGWDO01 01/11/2007 11:42:19 AM nrc.gov Files Size Date & Time MESSAGE 2700 01/11/2007 11:42:18 AM Options Auto Delete: No Expiration Date: None Notify Recipients: Yes Priority: Standard ReplyRequested: No Return Notification: None Concealed

Subject:

No Security: Standard To Be Delivered: Immediate Status Tracking: Delivered & Opened