ML070040188
| ML070040188 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 01/03/2007 |
| From: | Tam P NRC/NRR/ADRO/DORL/LPLIII-1 |
| To: | Scarpello M, Simpson S, Vasey B American Electric Power Co, Indiana Michigan Power Co |
| References | |
| TAC MD3161 | |
| Download: ML070040188 (2) | |
Text
From:
Peter Tam To:
Scarpello, Michael; Simpson, Sue; Vasey, Bob Date:
01/03/2007 1:08:00 PM
Subject:
D.C. Cook Unit 2: Request for conference Call re. Proposed Amendment (TAC MD3161)
Bob:
We are reviewing your 9/15/06 application for amendment re. reactor trip on low turbine oil pressure. Our reviewer, Jin-Sien Guo, has drafted the following questions which we would like to discuss with you in a conference call. The application indicates that the replacement of the turbine control system will increase nominal control fluid operating pressure from 114 psig to 1600 psig and will revise the allowable low fluid oil pressure value on turbine trip from greater than or equal to 57 psig to greater than or equal to 750 psig.
(1) Does the change involve any associated piping design changes?
(2) Does any pipe break associated with the change need to be considered due to the large increase in turbine oil operating pressure?
(3) There is insufficient information in the application regarding replacement of the current mechanical-hydraulic control system for the main turbine and the east and west main feed-pump turbine with a Triconex TS3000 triple modular redundant control system. Provide more detailed explanation on the new system regarding (i) system function, (ii) interaction with other systems, and (iii) previous operating experience of the new system.
This e-mail aims solely to prepare you and others for the proposed conference call. It does not convey a formal NRC staff position, and it does not formally request for additional information. Disposition of the above draft questions will be determined in the conference call.
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:
Jin-Sien Guo; John Segala; Schulten, Carl S Mail Envelope Properties (459BF100.A7F : 12 : 35330)
Subject:
D.C. Cook Unit 2: Request for conference Call re. Proposed Amendment (TAC MD3161)
Creation Date 01/03/2007 1:08:00 PM From:
Peter Tam Created By:
PST@nrc.gov Recipients Action Date & Time aep.com Transferred 01/03/2007 1:08:16 PM mkscarpello (Michael Scarpello) rgvasey (Bob Vasey)
sdsimpson (Sue Simpson) nrc.gov OWGWPO02.HQGWDO01 Delivered 01/03/2007 1:08:09 PM JSG CC (Jin-Sien Guo)
Opened 01/04/2007 9:52:58 AM nrc.gov TWGWPO02.HQGWDO01 Delivered 01/03/2007 1:08:00 PM CSS1 CC (Carl S Schulten)
JPS1 CC (John Segala)
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