ML20136H813
| ML20136H813 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 11/20/1985 |
| From: | Wilson R GENERAL PUBLIC UTILITIES CORP. |
| To: | Zwolinski J Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20136H817 | List: |
| References | |
| RFW-0688, RFW-688, NUDOCS 8511250200 | |
| Download: ML20136H813 (2) | |
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GPU Nuclear NggIgf 100 Interpace Parkway Parsippany, New Jersey 07054 201 263-6500 TELEX 136-482 Writer's Direct Dial Number:
RPd 0688 November 20, 1985 i
Mr. John A. Zwolinski, Chief Operating Reactors Branch No. 5 Division of Licensing U.S. Nuclear Regulatory Commission Washington, S. C. 20555
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Dear Mr. Zwolinski:
Subject:
Oyster Creek Nuclear Generating Station Docket No. 50-219 Cycle 11 Refueling Outage Feedwater Nozzle Internal Inspection Deferment By letter dated July 26, 1985, GPUN conveyed its intent to defer various
, regulatory items currently comitted to be performed during the Cycle 11 refueling outage.
In addition, GPUN indicated that justification would be provided to support a change in scope for the feedwater nozzle internal inspection.
Subsequentio the July 26, '985 letter and as discussed with members of your staff, GPUN has decided to proceed with deferment of the feedwater nozzle inspections. The attached technical justification supports deferment of the feedwater nozzle examination until the Cycle 12 refueling outage. The technical justification is based on the results of tests and analyses which demonstrate that any previously undetected flaws in the feedwater nozzles will not grou to an unacceptable size during two additional fuel cycles.
We are currently in the process of developing ultrasonic techniques that will provide maximum sensitivity in the detection of flaws which are of concern to nozzle integrity. Should this technique be available, it will be implemented during the Cycle 12 refueling outage.
However, if such a highly sensitive ultrasonic technique is not available, ultrasonic examination will be performed utilizing an available state-of-the-art technique. This technique will permit determination of impact on structural integity.
Penetrant and visual examinations will only be performed during Cycle 12 refueling outage should flaws be detected by ultrasonic examination which would compromise nozzle integrity.
Based upon the sensitivity of the ultrasonic technique used for the Cycle 12 refueling outage inspections, it will be determined as to whether a penetrant and visual examination is required during the Cycle 13 refueling outage. NUREG-0619 guidance would
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0511250200 851120 PDR ADOCK 05000219 i
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PDH GPU Nuclear is a part of the General Public Utihties System
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- require this examination be scheduled for our Cycle 13 refueling outage, therefore. justification for deferment need not be provided in this letter.
If you should have any questions concerning this request for deferement, please contact Mr. M. W. Laggart at (201) 299-2341.
Ver truly yours, hrR.F. Wilson,VcePresident and Director T hnical Functions
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cc: Dr. T. E. Murley, Administrator Region I-
,,b U.S. Nuclear Regulatory Commission 631 Park' Avenue King of Prussia, PA 19406 i
NRC Resident Inspector Oyster Creek Nuclear Generating Station forked River, New Jersey 08731 Mr. J. N.'Donohew U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, Maryland 20014
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