ML20073J699
| ML20073J699 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 09/26/1994 |
| From: | Hunger G PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML19304C598 | List: |
| References | |
| NUDOCS 9410070091 | |
| Download: ML20073J699 (4) | |
Text
Et:ti:n Oupport DIpirtmant 10 CFR 50.55a(c)(3) m PECO ENERGY
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Nuclear Grnup Headquarters 965 Chestert 'sok Boulevard Wayne. PA 190b7 %91 September 26,1994 Docket No. 50-277 License No. DPR-44 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
Subject:
Peach Bottom Atomic Power Station, Unit 2 Submittal of Proposed Alternative Repair Plan in Accordance with 10 CFR 50.55a(a)(3)
Dear Sir:
In our letter from G. A. Hunger, Jr. (PECO Energy Company) to U. S. Nuclear Regulatoly Commission (USNRC), dated September 16,1994, PECO Energy Company requested review and approval of the proposed repair plan for the Peach Bottom Atomic Power Station, Unit 2 core shroud in accordance with 10 CFR 50.55a(a)(3), in the event that such a repair is determined to be necessary.
In that letter, we stated that additional information, which would complete our request, would be supplied by September 26,1994. The additional information is contained in Attachments 1 and 2.
In a conference call between PECO Energy Company and the USNRC on September 19,1994, we were requested to document our scope of planned shroud inspections for PBAPS, Unit 2. Current plans are to inspect accessible portions of welds H-1 through H-5. We anticipate that the accessible portions will total two opposite 140 degree segments, or a total of 280 degrees of the circumference. In the case of welds H-6 and H-7, we plan to inspect accessible portions in the areas above the two access hole covers which we anticipate to be a maximum of two 15 degree segments, or a total of approximately 30 degrees for each weld, respectively.
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A DR ADOCK 05o00277
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September 26,1994 -
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-i In addition, Ultrasonic Test (UT) inspections are planned for each of the access hole covers. The examination boundary of these inspections will include a j
portion of weld H-8.
I As discussed also in our September 9,1994 letter, we stated that Eddy Current Testing is being considered for interrogation of the outside surface of the welds.
-l PECO Energy is no longer pursuing the use of Eddy Current Testing. Rather, l
the Creeping Wave Technique is being considered at this time as a wnniamental method for weld examination.
- contains informaton proprietary to General Electric. General Electric requests that the Attachment 2 information be withheld from public disclosure in accordance with 10 CFR 2.790(a)(4). In accordance with 2.790(b)(1), an affKiavit supporting this request is provided in Attachment 2.
j If you have any questions, please contact us.
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Very truly yours, j
I G. A. Hunger, Jr.,
l Director - Licensing l
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Attachments I
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cc:
T. T. Martin, Administrator, Region I, USNRC i
W. L Schmidt, USNRC Senior Resident inspector, PBAPS j
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i ATTACHMENT 1 Document 1.
Design Specification - Shroud Stabilizer Hardware, 2CA5579, Revision 1 l
2.
Code Design Specification - Shroud Stabilizers, 25A5580, Revision 1 l
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3.
Fabrication Specification - Fabrication of Shroud Stabilizer,25A5601, Revision 1 l
4.
Installation Specification - Cleaning and Cleanliness Control for Field Modifications of Vessel Components, 21 A2040, Revision 1 5.
Installation Specification - Stabilizer Installation, 25A5581, Revision 0 i
6.
Stress Report - Shroud Stabilizers,25A5607, Revision 0 a
7.
Peach Bottom Shroud and Shroud Repair Hardware Stress Analysis, GENE-771-58-0994, Revision 0, September,1994 i
8.
Field Disposition Instruction, Peach Bottom Unit 2 Shroud, FDI No. 0257-71067, Revision 0 9.
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ATTACHMENT 2 i
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Peach Bottom Seismic Analysis, GENE-771-60-0994, Revision 0 Drawings as identified in the Affidavit j
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