ML17291B074

Requests Review & Approval of Relief Request for Exam Category C-G Pump Casing Welds to Support Planning for Spring,1997 & Spring,1998 Refueling Outages

ML17291B074
Person / Time
Site:	Columbia
Issue date:	10/06/1995
From:	Parrish J WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GO2-95-208, NUDOCS 9510170394
Download: ML17291B074 (21)

Text

PRXORXTY 1 (ACCELERATED RIDS PROCESSING)

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

I ACCESSION NB 9510170394 DOC. DATE: 95/10/06 NOTARIZED: NO DOCKET g FACIL:5 -397 WPPSS Nuclear Project, Unit 2, Washington Public Powe 05000397 P AUTH.N E AUTHOR AFFILIATION PARRISH, Washington Public Power Supply System RECIP.NAME RECIPIENT AFFILIATION R Document Control Branch (Document Control Desk)

SUBJECT:

Requests review & approval of relief request for exam category C-G pump casing welds to support planning for Spring,1997 & Spring,1998 refueling outages. 0 DISTRIBUTION CODE: A047D COPIES RECEIVED:LTR ENCL SIZE TITLE: OR Submittal: Inservice/Testing/Relief from ASM Code GL-89-04 NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD4-2 LA 1 1 PD4-2 PD 1 1 CLIFFORD,J 1 1 INTERNAL 6 0 AEOD/SPD/RAB 1 1 EZLE CEN 1 1 NRR/DE/EMCB 1 1

~~EMEB 1 1 NUDOCS-ABSTRACT 1 1 OGC/HDS3 1 0 RES/DSIR/EIB 1 1 EXTERNAL: LITCO ANDERSON 1 1 NOAC 1 1 NRC PDR 1 1 D 0

C M

N NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM OWFN 5DS (415-2083) TO ELIMINATE YOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 19 ENCL 12

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WASHINGTON PUBLIC POWER SUPPLY SYSTEM P.O. Box 968 ~ 3000 George Washington Way ~ Richland, Washington 99352-0968 ~ (509) 372-5000 Docket No. 50-397 October 6, 1995 G02-95-208 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555 Gentlemen:

Subject:

WNP-2, OPERATING LICENSE NPF-21 SECOND 10-YEAR INSERVICE INSPECTION PROGRAM PLAN RELIEF REQUEST FOR EXAMINATION CATEGORY C-G PUMP CASING WELDS

References:

Letter GO2-94-286, dated December 27, 1994, JV Parrish (SS) to NRC, "Second 10-Year Inservice Inspection Program Plan" This letter submits for NRC approval relief request 2ISI-15.

In accordance with 10CFR50,55a(g)(6)(i), the Supply System requests relief from performing a surface examination per ASME Section XI, 1989 Edition with no Addenda, Subarticle IWC-2400 of Examination Category C-G pumps'asing welds until the pumps are disassembled for maintenance. This relief request is based on the hardship it will cause the Supply System to disassemble the pumps for the sole purpose of performing the examinations. The relief request is provided as Attachment 1 and applies to the second 10-year Inservice Inspection Program Plan which was submitted with the referenced letter. Attachment 2 contains the ISI Program Plan Table 9.1.4 pages revised by this relief request.

Review and approval of this relief request is requested prior to October 1, 1996 to support planning for the Spring, 1997 and Spring, 1998 refueling outages.

Should you have any questions or desire additional information regarding this matter, please call me or D. A. Swank at (509) 377-4563.

Sincerely, J.. Parrish (Mail Drop 1023)

V President, Nuclear Operations DPR/dpr cc: LJ Callan - NRC RIV KE Perkins, Jr. - NRC RIV, Walnut Creek Field Office NS Reynolds - Winston & Strawn JW Clifford - NRC

~. <'PC,Qg DL Williams - BPA/399 NRC Sr. Resident Insoector - 927N 9510170394 951006 PDR ADOCK 05000397 p PDR

.I ATTACHMENT 1 RELIEF REQUEST NO. 2ISI-15 Welds for Which Relief is Requested'SME Section XI Examination Category C-G, Code item number C6.10, pressure retaining welds in pumps and valves.

I~den . No N D~~~cri >~in I~N ~ISI DI N .

RHR-P-2A RHR-P-2AC-1 PMP CAS/CIR WLD'MP C6.10 RHR-213 RHR-P-2AC-2 CAS/CIR WLD C6.10 RHR-213 RHR-P-2AC-3 PMP CAS/CIR WLD C6.10 RHR-213 RHR-P-2AC-4 PMP CAS/CIR WLD C6, 10 RHR-213 RHR-P-2 AC-5 PMP CAS/CIR WLD C6,10 RHR-213 RHR-P-2AN-1 PMP NOZZLE WELD'MP C6.10 RHR-213 RHR-P-2 AN-2 NOZZLE WELD C6.10 RHR-213 RHR-P-2AN-3 PMP NOZZLE WELD C6.10 RHR-213 RHR-P-2AL-1 PMPCAS/LONG.WLD~ C6.10 RHR-213 RHR-P-2AL-2 PMPCAS/LONG.WLD C6.10 RHR-213 RHR-P-2B RHR-P-2BC-1 PMP CAS/CIR WLD C6.10 RHR-213 RHR-P-2BC-2 PMP CAS/CIR WLD C6,10 RHR-213 RHR-P-2BC-3 PMP CAS/CIR WLD C6.10 RHR-213 RHR-P-2BC-4 PMP CAS/CIR WLD C6.10 RHR-213 RHR-P-2BC-5 PMP CAS/CIR WLD C6.10 RHR-213 RHR-P-2BN-1 PMP NOZZLE WELD C6.10 RHR-213 RHR-P-2BN-2 PMP NOZZLE WELD C6.10 RHR-213 RHR-P-2BN-3 PMP NOZZLE WELD C6.10 RHR-213 RHR-P-2BL-1 PMPCAS/LONG.WLD C6.10 RHR-213 RHR-P-2BL-2 PMPCAS/LONG.WLD C6.10 RHR-213 RHR-P-2BL-3 PMPCAS/LONG. WLD C6.10 RHR-213 Pump casing circumferential weld Pump nozzle weld Pump casing longitudinal weld,,

Page 1

ATTACHMENT 1 RELIEF REQUEST NO. 2ISI-15 RHR-P-2C RHR-P-2CC-1 PMP CAS/CIR WLD C6.10 RHR-213 RHR-P-2CC-2 PMP CAS/CIR WLD C6.10 RHR-213 RHR-P-2CC-3 PMP CAS/CIR WLD C6.10 RHR-213 RHR-P-2CC-4 PMP CAS/CIR WLD C6.10 RHR-213 RHR-P-2CC-5 PMP CAS/CIR WLD C6.10 RHR-213 RHR-P-2CN-1 PMP NOZZLE WELD C6.10 RHR-213 RHR-P-2CN-2 PMP NOZZLE WELD C6.10 RHR-213 RHR-P-2CN-3 PMP NOZZLE WELD C6.10 RHR-213 RHR-P-2CL-1 PMPCAS/LONG.WLD C6.10 RHR-213 RHR-P-2CL-2 PMPCAS/LONG.WLD C6,10 RHR-213 RHR-P-2CL-3 PMPCAS/LONG.WLD C6.10 RHR-213 HPCS-P-1 HPCS-P-1C-1 PMP CAS/CIR WLD C6.10 HPCS-206-1 HPCS-P-1C-2 PMP CAS/CIR WLD C6.10 HPCS-206-1 HPCS-P-1C-3 PMP CAS/CIR WLD C6.10 HPCS-206-1 HPCS-P-1C-4 PMP CAS/CIR WLD C6.10 HPCS-206-1 HPCS-P-1C-5 PMP CAS/CIR WLD C6.10 HPCS-206-1 HPCS-P-1C-6 PMP CAS/CIR WLD C6.10 HPCS-206-1 HPCS-P-1C-7 PMP CAS/CIR WLD C6.10 HPCS-206-1 HPCS-P-1N-1 PMP NOZZLE WELD C6.10 HPCS-206-1 HPCS-P-1N-1 PMP NOZZLE WELD C6.10 HPCS-206-1 HPCS-P-1N-2 PMP NOZZLE WELD C6.10 HPCS-206-1 HPCS-P-1L-1 PMPCAS/LONG.WLD C6.10 HPCS-206-1 HPCS-P-1L-2 PMPCAS/LONG.WLD C6.10 HPCS-206-1 HPCS-P-1L-3 PMPCAS/LONG. WLD C6.10 HPCS-206-1 LPCS-P-1 LPCS-P-1C-1 PMP CAS/CIR WLD C6.10 LPCS-208-1 LPCS-P-1C-2 PMP CAS/CIR WLD C6.10 LPCS-208-1 LPCS-P-1C-3 PMP CAS/CIR WLD C6.10 LPCS-208-1 LPCS-P-1C-4 PMP CAS/CIR WLD C6.10 LPCS-208-1 LPCS-P-1C-5 PMP CAS/CIR WLD C6.10 LPCS-208-1 LPCS-P-1N-1 PMP NOZZLE WELD C6.10 LPCS-208-1 LPCS-P-1N-2 PMP NOZZLE WELD C6.10 LPCS-208-1 Page 2

I ATTACHMENT 1 RELIEF REQUEST NO. 2ISI-15 LPCS-P-1N-3 PMP NOZZLE WELD C6.10 LPCS-208-1 LPCS-P-1L-1 PMPCAS/LONG.WLD '6.10 LPCS-208-1 LPCS-P-1L-2 PMPCAS/LONG.WLD C6.10 LPCS-208-1 LPCS-P-1L-3 PMPCAS/LONG.WLD C6.10 LPCS-208-1 Section XI RequirementsSection XI, Table IWC-2500-1, Examination Category C-G, items C6.10 requires a surface examination of the weld and adjacent base metal, The examination can be performed from either the inside or outside of the pump casing. Per subarticle IWC-2400 "Inspection Schedule",

the required examinations in each Examination Category shall be completed each inspection interval in accordance with Table IWC-2412-1. This table requires that approximately one third of the items in each category be examined each inspection period (3 to 4 year intervals).

Code Requirement from Which Relief is Requested Relief is requested from the requirements of IWC-2400 for Examination Category C-G welds of pumps HPCS-P-1, LPCS-P-1, RHR-P-2A, RHR-P-2B, and RHR-P-2C. This requires approximately one third of the welds be examined each inspection period.

Basis for Relief Relief is requested on the basis that examination of these welds to the schedule required by IWC-2400 places a hardship on the plant. The subject pumps were designed prior to the requirement to perform Class 2 component examinations for inservice inspection. The upper flange for the pumps are located at floor level and the casings are embedded in a pump pit which does not allow access to the outside surface of the pumps. Due to the inaccessibility of the pumps it is impractical to perform the nondestructive examinations required by IWC-2400. The pump welds are accessible for examination from the pump internal surfaces. To meet the requirements of IWC-2400, the pump would require disassembly and removal of the pump impeller. At least one pump would be required to be disassembled each inspection period. A pump disassembly would result in a large expenditure of manhours and accompanying personnel exposure. This expenditure of manhours and personnel exposure for the sole purpose of performing nondestructive examination of the pump casings is considered a hardship. Figures 1, 2, and 3 illustrate the installation details for the pumps.

Page 3

ATI'ACHMENT 1 RELIEF REQUEST NO. 2ISI-15 Alternative Examinations When pumps HPCS-P-l, LPCS-P-1, RHR-P-2A, RHR-P-2B, and RHR-P-2C are disassembled for maintenance, to the degree that the welds are accessible for examination, the requirements of Code Examination Category C-G will be implemented for the disassembled pumps. The examination will be performed on accessible areas of the welds as defined in ASME Section XI Figure IWC-2500-8. Since pumps RHR-P-2A, RHR-P-2B, and RHR-P-2C are of the same design and perform similar functions only one of these pumps will be examined during the inspection interval (Section XI, Table IWC-2500-1, Examination Category C-G, note 1), ifthey are disassembled.

Justification for the Granting of Relief This relief request should be granted for the following reasons:

1. It is estimated to take at least 3 days to disassemble a pump and at least another 4 days to reassemble the pump. The general area dose on the inside of the pipe and pump is calculated to be 200 mrem/hr. This would result in a large expenditure of manhours and personnel dose to perform the nondestructive examination.

2. The accessible portions of the welds will be examined when the pumps are disassembled for maintenance. This examination of welds and base metal should detect generic degradation of the pump casing welds.

3. The pumps are routinely tested for operability per plant Technical Specifications and are subject to periodic system pressure tests per the requirements of ASME Section XI.

4. Pump operating conditions (i.e. flow, pressure) are available to the control room operators and coritrol room annunciators are provided to alert plant operators to abnormal operating conditions.

5. Plant procedures are in place for the operators to respond to abnormal pump conditions (i.e.

pump failure) and redundant safety systems exist if a pump were to become inoperable..

6. The casing welds for pumps RHR-P-2A, RHR-P-2B, and RHR-P-2C underwent a magnetic particle preservice inspection examination from the internal surface of the pumps prior to plant startup, The HPCS-P-1 and LPCS-P-1 pumps were not required to undergo a preservice inspection.

Page 4

0 ATTACHMENT 1 RELIEF REQUEST NO. 2ISI-15 The measures taken by the alternative examinations and the routinely scheduled surveillances and testing identified above ensure plant safety is maintained.

Implementation Schedule This relief request will be implemented during the second inservice inspection interval.

Page 5

ATTACHMENT 1 RELIEF REQUEST NO. 2ISI-15 NOTES:

1. THIS DRAWING IS INTENDED FOR USE IN PRESERVICE AND INSERVICE INSPECTION PROGRAMS ONLY.

2. CASING MATERIALS ARE SA516 GR.70 PLATE.

3. PREFIX HPCS-P-1 IS LEFT OFF EACH WELD NUMBER FOR CLARITY. HPCS-P-1 (E22-C001)

LEGEND:

C CIRCUMFERENTIAL WELD L LONGITUDINAL WELD N NOZZLE WELD REFERENCE ORAWINGS:

FABRICATION PACKAGE C-4 MPLiII E22-C001 N-3 C-5 GENERAL ARRANGEMENT CVliIi 02E22-06,7 C-6 DISCHARGE FLOOR EL. 422'-3 P \

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ORAWN OAtE CHECKED OAtE APPROVEO OAtE OWG NO. REV.

D.L EHR 9-1-95 ~~ > -~-'/ (MiA 'P/~~ HPCS-206-1 SH 1 OF 1 POS2-AV RO (8/94)

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ATTACHMENT I RELIEF REQUEST No. 2ISI-15 NOTES:

1. THIS DRAWING IS INTENDED FOR USE IN PRESERVICE AND INSERVICE PROGRAMS ONLY.

2. CASING MATERIALS ARE SA516 GR.70 PLATE. LPCS-P-1 (E21-C001)

3. PREFIX LPCS-P-1 IS LEFT OFF EACH WELD FOR CLARITY LEGEND C CIRCUMFERENTIAL WELD L LONGITUDINAL WELD N NOZZLE WELD REFERENCE DRAWINGS C-4 FABRICATION PACKAGE N-3 MPLg E21 -C001 GENERAL ARRANGEMENT CVIg 02E21-06,8 C-5 DISCHARGE FLOOR EL. 422'-3"

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ATTACHMENT 2 Table 9.1.4 WHP-2 Washington Public Power Supply System Interval 2 ISI Program Plan and Schedule Revision 1 HPCS - High Pressure Core Spray (Grouped by Drawing No. and WalkdoHn Order)

Out. Rel.

Pg Identification No. Description Category Item No. Method Per. Out. Requnt. Code Freq. Req. Remarks Diagram No. HPCS-206 01 HPCS-P-1C-1 PHP CAS/CIR 'WLD C-G C6.10 SUR C 0 15 HPCS-P-1C-2 PMP CAS/CIR WLD C-G C6.10 SUR C 0 15 HPCS-P-1C-3 PMP CAS/CIR WLD C-G C6.10 C 0 15 HPCS-P-1C-4 PHP CAS/CIR WLD C-G C6.10 SUR c 0 15 HPCS-P-1C-5 PMP CAS/CIR WLD C-G C6.10 SUR C 0 15 HPCS-P-1C-6 PMP CAS/CIR WLD C-G C6.10 C 0 15 HPCS-P-1C-7 PMP CAS/CIR WLD C-G C6.10 C 0 15 HPCS-P.1N-1 PHP NOZZLE 'WELD C-G C6.10 C 0 15 HPCS-P-1H-2 PMP NOZZLE WELD C-G C6.10 C 0 15 HPCS-P-1N-3 PMP NOZZLE 'WELD C-G C6.10 SUR C 0 15 HPCS-P-1L-1 PMPCAS/LONG WLD C-G C6.10 SUR C 0 15 HPCS-P-1L-2 PMPCAS/LONG 'WLD C-G C6.10 C 0 15 HPCS-P-1L-3 PMPCAS/LONG WLD C-G C6.10 C 0 15 Page 48-1

ATTACHMENT 2 Table 9.1.4 WNP-2 Washington Public Power Supply System Interval 2 ISI Program Plan and Schedule Revision 1 LPCS - Low Pressure Core Spray (Grouped by Drawing No. and Walkdown Order)

Out. Rely Pg Identification No. Description Category Item No. Hethod Per. Out. Re@mt. Code Freq. Req. Remarks Diagram No. LPCS-208 01 LPCS-P-1C-1 PHP CAS/CIR WLD C-G C6.10 C 0 15 LPCS-P.1C-2 PHP CAS/CIR WLD C-G C6.10 SUR C 0 15 LPCS-P-1C-3 PHP CAS/CIR WLD C-G C6.10 SUR C 0 15 LPCS-P-1C-4 PHP CAS/CIR WLD C-G C6.10 SUR C 0 15 LPCS-P-1C-5 PHP CAS/CIR WLD C-G C6.10 SUR C 0 15 LPCS-P-1N-1 PHP NOZZLE WELD C-G C6.10 SUR C 0 15 LPCS-P-1N-2 PHP NOZZLE WELD C-G C6.10 C 0 15 LPCS-P-1N-3 PMP NOZZLE WELD C-G C6.10 C 0 15 LPCS-P-1L-1 PMPCAS/LONG 'WLD C-G C6.10 C 0 15 LPCS-P-1L-2 PMPCAS/LONG WLD C-G C6.10 C 0 15 LPCS-P-1L-3 PHPCAS/LONG WLD C-G C6.10 C 0 15 Page 62-i

ATTACHMENT 2 Table 9.1.4 WNP-2 Washington Public Power Supply System Interval 2 ISI Program Plan and Schedule Revision 1 RHR - Residual Heat Removal (Grouped by Drawing No. and Walkdown Order)

Out. Rely Pg Identification No. Description Category Item No. Method Per. Out. Requnt. Code Freq. Req. Remarks Diagram No. RHR-213 RHR-P-2AC-1 PMP CAS/CIR WLD C-G C6.10 SUR 2 C 0 15 RHR-P-2AC-2 PMP CAS/CIR WLD C-G C6.10 SUR 2 C 0 15 RHR-P-2AC-3 PMP CAS/CIR 'WLD C-G ~ C6.10 Z C 0 15 RHR-P-2AC-4 PMP CAS/CIR WLD C-G C6.10 2 C 0 15 RHR-P-2AC-5 PMP CAS/CIR WLD C-G C6.10 2 C 0 15 RHR-P-2AN-1 PMP NOZZLE WELD C-G C6.10 SUR Z C 0 15 RHR-P-2AN-2 PMP NOZZLE WELD C-G C6.10 SUR Z C 0 15 RHR-P-2AN-3 PMP NOZZLE WELD C-G C6.10 SUR 2 C 0 15 RHR-P-2AL-1 PMPCAS/LONG.WLD C-G C6.10 2 C 0 15 RHR-P-2AL-2 PMPCAS/LONG.WLD C-G C6.10 SUR Z C 0 15 RHR-P-2A(CS) RHR PUHP BASE F-A F1.40A VT-3 1 10 41 CE 10 RHR-P-2BC-1 PMP CAS/CIR WLD C-G C6.10 SUR 2 C 0 15 RHR-P-2BC-2 PMP CAS/CIR WLD C-G C6.10 SUR 2 C 0 15 RHR-P-2BC-3 PMP CAS/CIR WLD C-G C6.10 SUR Z C 0 15 RHR-P-2BC-4 PMP CAS/CIR WLD C-G C6.10 SUR Z C 0 15 RHR-P-2BC-5 PMP CAS/CIR 'WLD C G C6.10 SUR 2 C 0 15 Page 349

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ATTACHMENT 2 Table 9.1.4

'WNP-2 Washington Public Power Supply System Interval 2 ISI Program Plan and Schedule Revision 1 RHR - Residual Heat Removal (Grouped by Drawing No. and Walkdown Order)

Out. Rely Pg Identification No. Description Category Item No. Method Per. Out. Requnt. Code Freq. Req. Remarks Diagram No. RHR-213 RHR-P-2BN-1 PMP NOZZLE WELD C-G C6.10 SUR C 0 15 RHR-P-2BN-2 PMP NOZZLE WELD C-G C6.10 C 0 15 RHR-P-2BN-3 PMP NOZZLE WELD C-G C6.10 SUR C 0 15 RHR-P-2BL-1 PMPCAS/LONG.WLD C-G C6.10 SUR C 0 15 RHR-P-2BL-2 PMPCAS/LONG.WLD C-G C6.10 C 0 15 RHR-P-2BL-3 PMPCAS/LONG.WLD C-G C6.10 SUR C 0 15 RHR-P-28(CS) RHR PUMP BASE F-A F1.40A VT-3 1 10 41 CE 10 RHR-P-2CC-1 PMP CAS/CIR WLD C-G C6.10 SUR C 0 15 RHR-P-2CC-2 PMP CAS/CIR WLD C-G C6.10 SUR C 0 15 RHR-P-2CC-3 PMP CAS/CIR WLD C-G C6.10 SUR C 0 15 RHR-P-2CC-4 PMP CAS/CIR WLD C-G C6.10 C 0 15 RHR-P-2CC-5 PMP CAS/CIR WLD C-G C6.10 C 0 15 RHR-P-2CN-1 PMP NOZZLE WELD C-G C6.10 C 0 15 RHR-P-2CN-2 PMP NOZZLE WELD C-G C6.10 C 0 15 RHR-P-2CN-3 PMP NOZZLE WELD C-G C6.10 C 0 15 RHR-P-2CL-'I PMPCAS/LONG.WLD C-G C6.10 SUR C 0 15 RHR-P-2CL-2 PMPCAS/LONG.'WLD C-G C6.10 C 0 15 RHR-P-2CL-3 PMPCAS/LONG.WLD C-G C6.10 SUR = Z C 0 15 RHR-P-2C(CS) RHR PUMP BASE F-A F1.40A VT-3 1 10 41 CE 10 RHR-PB-213(L) LK PRES BNDRY C-H C7.50 VT-2 1 13 P CE 3 RHR-PB-213(H) HYDRO PRES BNDR C-H C7.60 VT-2 3 19 E CE 10 Page 350

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