ML20077E335
| ML20077E335 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 12/06/1994 |
| From: | Aitken P COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20077E341 | List: |
| References | |
| GL-88-16, PCA-94-006, PCA-94-6, NUDOCS 9412120242 | |
| Download: ML20077E335 (3) | |
Text
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C:mm:nwealth Edisrn Quad Citras Nuclear Power Station 22710 206 Avenue North Cordova, lilinois 61242-9740 Telephone 309/654 2241 PCA-94-006 December 6,1994 Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attention: Document Control Desk
Subject:
Quad Cities Station Unit 2 Revised Cycle 13 Core Operating Limits Report NRC, Docket No. 50-265
Dear Sir:
The purpose of this letter is to advise you of a change to Commonwealth Edison's (Comed)
Quad Cities Station Unit 2 Cycle 13 Core Operating Limits Report (COLR) consistent with Generic Letter 88-16.
It was discovered that the turbine bypass valve opening times are non-conservative with respect to the system design and reload licensing analyses. As a result, Comed has concluded (OSR 94-37) that a change to the Unit 2 Operating Limit MCPR was necessary.
A revised copy of the Unit 2 Cycle 13 COLR has been provided.
If there are any further questions regarding this matter, please contact this office.
caw C b Paul C. Aitken System Engineering Supervisor Quad Cities Station PCA\\JP\\db Attachment - Quad Cities Station Unit 2 Cycle 13 Core Operating Limits Report cc:
J.B. Martin - Regional Administrator, Region III R. Pulsifer - Project Manager, NRR C. Miller - Resident Inspector
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NFS:BSS:94-200 Messrs:
William Pierce Jeff Miller
Subject:
Request for On-Site Review of Proposed Changes to Quad Cities Unit 2 Cycle 13 Core Operating Limits Report
References:
- 1. Core Operating Limits Report, Quad Cities' Unit 2 Cycle 13, April,1994.
- 2. " Recommendations for Quad Cities Unit 2 to resolve Main Turbine Bypass Opening Uncertainty", John M. Freeman to E. A.
McVey, December 5,1994, NFS:RSA 94-179.
- 3. " Quad Cities Turbine Bypass Valve Opening Time Measurement," letter from Paul C. Aitken (QCISYS) to Ed McVey, December 1,1994.
4.
" Recommendations for Dresden and Quad Cities Stations to Resolve Main Turbine Bypass Valve Opening Time Uncertainty,"
Edward A. McVey to E. D. Eenigenburg, et. al., September 27, 1994, NFS:BSS:94-166.
- 5. GE letter, " Bounding Estimate of Operating Limit MCPR for Turbine Bypass Valves inoperative" R. E. Kingston to R. W. Tsai, September,1994, REK:079.
The purpose of this memorandum is to present a package suitable for On-Site Review of the Quad Cities Station Unit 2 Cycle 13 Core Operating Limits Report (COLR) for the current operating cycle (Reference 1). This package should be implemented based on the conclusions of Reference 2 which evaluated the Main Turbine Bypass Valve Opening Time results specified in Reference 3.
The appropriate NFS personnel have reviewed the enclosed package. The following attachments are provided:
A.
Revised COLR for Quad Cities Unit 2 Cycle 13 B.
NFS 50.59 Evaluation This change is being initiated due to the failure of the Unit 2 main turbine bypass valves (Reference 3) to open in the time required by the transient documents
V D:c mbir 5,1994 used in the cycle licensing basis. This change incorporates a bounding and conservative Operating Limit MCPR for feedwater controller failure (FWCF) when the main turbine bypass valves fail to open (Reference 5). The current (Reference
- 4) administratively applied OLMCPR (1.42) in the control room will be implemented into the Q2C13 COLR.
If you have any questions, please contact John Meyer at x3822.
{ h M C-Edward A. McVey BWR Support Services Supervisor EAM:JJM:pc Enclosure cc:
J. M. Piekut R. W. Tsai D. A. Barringer / J. K. Wheeler T.P.Shannon File: QA File NFS-CF (w/o Atts.)
BSS-CF 1
1