ML20128A317
| ML20128A317 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 05/20/1985 |
| From: | Daltroff S PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Stolz J Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8505240185 | |
| Download: ML20128A317 (6) | |
Text
PH(L'ADELPHIA ELECTRIC COMPANY 23O1 MARKET STREET P.O. BOX 8699 PHILADELPHIA. PA.19101 SHIELDS L. DALTROFF st E*E"4EU'o" May 20, 1985 Docket No. 50-277 Mr. John F. Stolz, Chief Operating Reactors Branch #4 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.
20555
SUBJECT:
Peach Bottom Atomic Power Station Unit Nos. 2 and 3 - Second 120-Month Inservice Inspection (ISI) Program
REFERENCE:
Letter, S. L. Daltroff, PECo, to J. F. Stolz, USNRC, dated January 31, 1985
Dear Mr. Stolz:
The reference letter forwarded specific relief requests for Class 1 piping system welds which present limitations to examination to the requirements of Section XI of the 1980 Edition through Winter 1981 Addenda of the ASME Code for the second 120-month ISI program applicable to Peach Bottom Unit 2.
This letter forwards additional inspection limitations as a result of recent primary coolant pressure boundary piping replacement activities.
The additional category B-J (Pressure Retaining Welds in Class 1 Piping) and category B-K-1 (Integrally Welded Attachments for Class 1 Piping) which present limitations to examination are summarized in Attachment 1 to this letter.
Additionally, changes to Relief Requests 2.4.9, 2.4.10 and 2.4.ll~ contained in the reference letter are included in Attachment 2 to reflect the correct weld category (B-K-1) in accordance with Section XI i-requirements.
8505240185 850520 PDR ADOCK 05000277
(
O PDR di l
F pf May 20, 1985'
- i. Mr. John'F. Sto,1z-Page-2~
iShould you require _any additional information, please do
-not hesitate to contact us.
Very..truly yours, vl, azay-nr
- cc:
' _T. P. Johnson, Resident Site Inspector e
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n Pngo 1 of 1 ATTACHMENT 1 TABLE 2.2.2 UNIT 2 CLASS I COMPONENTS AND WELDS FOR WHICH CODE
=
RELIEF IS REQUESTED S:ction XI Section XI
' Weld Percent Not Relief Item No.-
Category
-Number Method Accessible Request ClO.10 B-K-1 2-AS-22HL-1 Sur 20 2.4.10 thru 4 B10.10.
B-K-1 2-AD-32HL-1 Sur 20 2.4.10 thru'4
'B10.lO B-K-1 2-BS-20HL-1 Sur 20 2.4.10 thru 4
'B10.10
'B-K-1 2-BD-29HL-1 Sur 20 2.4.10 thru 4 B10.10 B-K-1
- 10-HS-34-HL Sur 20 2.4.10
-1 thru 4
.B10.10 B-K-1
- 10-0-34HL-Sur 20 2.4.10
-1 thru 4 010.10 B-K-1
- 10-0-35CL Sur 50 12.4.9
-1 thru 4 E9.12 B-J-10-IB-15LU Vol/Sur 83 2.4.6 B9.12 B-J 10-IA-15LU Vol/Sur 91 2.4.6 E9.12 B-J 10-0-35LD Vol/Sur 58 2.4.6
- Replaces 10-HS-12HL-1 thru 4.
0*' Replaces 10-HS-17HL-l thru 4.
00* Replaces 10-0-16CL-1 thru 4.
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'Paga 1 of 3 ATTACHMENT 2 Requests for Relief-o
- 2.4.9 Request-for Relief' 2.4.9.1 Components
- Class 1, ' Category B-J, Pressure Retaining welds in piping.
2.4.9.2 Requirement from'which' Relief Requested Table IWB-2500-1, Category.B-J, Items 9.11 and 9.12, requires volumetric and surface examination oficircumferential and longitudinal p
welds in piping of nominal size 2,'4 in.
2.4.9.3 Justification
-Subject-welds are entirely or partially obstructed.from examination due to whip restraints, or containment penetrations.
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-2.4.9.4^
Alternate to Section XI Requirements ll Partial examinations will be performed at accessible weld locations.
Inaccessible weld locations will be. visually-examined during routine system leakage and hydrostatic pressure tests.
-2.4.10 Request for Relief 2.4.10.1-Components Class 1, Category B-J, Pressure Retaining welds in piping.
2.4.10.2 Requirement from which Relief Requested Table IWB-2500-1, Category B-J, Items 9.11 and 9.12, require volumetric and surface examination of circumferential and longitudinal 7
welds in piping of nominalisize 2,4 in.
2.4.10.3 Justification Subject welds are partially obstructed from examination ~due to position of pipe clamp.
To perform an entire examination on these hanger
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Pcga 2_of 3 lugs would necessitate. removing ~the-clamp-from-the pipe.
This' disassembly would involve performing an
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- engineering analysis to ensure proper' support of pipe,'and in addition, a temporary support may have-to be installed.
A-' job of this scope represents an unnecessary-
-risk of an industrial accident, radiation exposure, and extensive ~ expense, soley-to perform approximately.20% of the required examination.
In view of-the minimal benefits to be obtained, it is concluded that this' code requirement is impractical at Peach Bottom.
-2.4.10.4 Alternate to Section XI Requirements Partial examinations will be performed at the accessible weld locations.
Inaccessible weld locations will be, examined in entirety if the.
clamp is removed for maintenance or.other reasons, otherwise a visual examination will be performed during routine leakage and
' hydrostatic test.
2.411 Request'for Relief 2.4.11.1 Components Class 1, Category B-K-1, Integral Attachments for Piping Pumps and ' Values.-
2.4.11.2 Requirement from which Relief Requested B-K-1 Item B10.10 Table-IWB-2500-1, Category /or surfaceLas requires a' volumetric and applicable of Integral attachment welds on piping.
2.4.11.3 Justification Subject welds are partially obstructed from examination due to insufficient space between
.-adjacent lug.
Pega 3 of_3 2.4.11.4-Alternate "o Section XI Requirements-c Partial examinations'will be_ performed at accessible weld locations.
Inaccessible weld locations will be visually examined during routine system leakage and hydrostatic pressure tests.
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