ML20069F356
| ML20069F356 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 05/31/1994 |
| From: | Hunger G PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9406080229 | |
| Download: ML20069F356 (4) | |
Text
Etztlort Eupport DIptrtmtnt e
_g PECO ENERGY
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FJuclear Group Headquarters 965 Chesterbrook Doulevard Wayne. PA 19087-SfM1 May 31,1994 Docket Nos. 50-277 50-278 License Nos. DPR-44 DPR-56 i
U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
Subject:
Peach Bottom Atomic Power Station, Units 2 and 3 Request for Rollof from Performing Completo Examination of Certain Class 1 Integrally Welded Attachments (Relief Request No. RR-18)
Dear Sir:
Attachod for your review and approval is Rollof Request No. RR-18 for the Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3, Second Ten-Year Interval inservice inspection (ISI)
Program. Rollef Request No. RR-18 requests relief from the American Society of Mochanical Engineers (ASME) Boller and Pressure Vessel (B&PV) Code,Section XI,1980 Edition, requirement that 100% of the all welds connecting integral attachments to the reactor pressure vessel be examined using volumetric or surface examinations during the second ten-year ISI interval as specified in Subsection IWB-2500, Tablo IWB-2500-1 We are specifically requesting rollof from performing a complete 100% examination of certain Class 1 integrally wolded attachments to the reactor pressure vessel due to physical plant restrictions. The details and justification supporting this request are provided in the attached rollef requ9st.
If you have any questions or require additional information, please do not hesitate to contact us.
Very truly yours, G. A. Hunger, Jr., Director Licensing Attachmont cc:
T. T. Martin, Administrator, USNRC, Region I W. L Schmidt, USNRC Senior Resident inspector, PBAPS t
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ATTACHMENT Peach Bottom Power Station Unks 2 and 3 I
Inservice inspection Program RELIEF REQUEST No. RR-18 9
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Specification M 733-3, Rev.
PBAPS, Units 2 and 3 ISI Program Appendix A-18 Page 1 of 2 i
RELIEF REQUEST NO. RR-18 1.
IDENTIFICATION OF COMPONENTS ISI Class 1 Integrally Welded Attachments to the Reactor Pressure Vessel, Examination Category B-H, Item Number B8.10.
The specific Class 1 components affected by this relief request are detailed in Table RR-18-01.
II.
CODE REQUIREMENTS FROM WHICH RELIEF IS REQUESTED ASME Section XI,1980 Edition, through the Winter 1981 Addenda, Code Category B-H, requires that 100% of the welds connecting all integral attachments to the Reactor Pressure Vessel be examined using the volumetric or surface examination methods. The required examinations shall be performed during the second inservice inspection Interval in accordance with Table IWB-2500-1.
Relief is requested from performing a complete (100%) examination of certain Class I integrally welded attachments due to physical plant restrictions.
Ill.
BASIS FOR RELIEF The components requiring relief are detailed in Table RR-18-01. The subject welded attachments are the eight (8) Reactor Pressure Vessel Stabilizer Bars. Access to perform complete examinations of these attachments is physically restricted by the bloshield wall. Because the top of the shield wall is immediately adjacent to the underside of the stabilizer bar, access for examination of a portion of this region does not exist. Major plant modifications would be required to improve access and increase examination coverage. Included in Table RR-18-01 is the pertinent information relative to the extent of examination which has been, or is expected to be completed, along with the basis for the access restrictions.
i IV.
ALTERNATE PROVISIONS Each of the Stabilizer Bars will be examined to the maximum extent possible, using the surface examination raethod. No alternate provisions are applicable in this situation.
Specification M-733-3, Rev.
PBAPS, Units 2 and 3 ISI Program Appendix A-18 Page 2 of 2 Relief Request RR-18 (Contd)
TABLE RR-18-01
_ UNIT _2 Component Limiting Examination idenLEcat!ao Descriotion Condition
% Comolete Support-1(IA)
Stabilizer Bar Bloshield 76%
@ 0 Deg.
Support 2(IA)
Stabilizer Bar Bioshield 76 %
@ 45 Dog.
Support-3(IA)
Stabilizer Bar Bloshield 76%
@ 90 Dep.
Support-4(IA)
Stabilizer Bar Bioshield 76 %
@ 135 Dog.
Support-5(IA)
Stabilizer Bar Bloshleid 76 %
@ 180 Deg.
Support-6(IA)
Stabilizer Bar Bloshleid 76 %
@ 225 Dog.
Support 7(IA)
Stabilizer Bar Bloshleid 76 %
@ 270 Deg.
Support-8(IA)
Stabilizer Bar Bloshield 76 %
@ 315 Dog.
UNIT 3 Component Limiting Examinstion Identification Descriotion Condition
% Comolete Support-1(IA)
Stabilizer Bar Bloshield 76 %
@ 0 D eg.
Support-2(IA)
Stabilizer Bar Bloshield 76 %
@ 45 Dog.
Support-3(IA)
Stabilizer Bar Bioshield 76 %
@ 90 Dog.
Support-4(IA)
Stabilizer Bar Bloshield 76 %
@ 135 Dog.
Support-5(IA)
Stabillzer Bar Bioshield 76%
@ 180 Dog.
Support 6(IA)
Stabilizer Bar Bloshield 76 %
@ 225 Dog.
Support-7(IA)
Stabillzer Bar Bloshield 76 %
@ 270 Deg.
Support-8(IA)
Stabl!!zer Bar Bioshield 76 %
@ 315 Deg.