ML17276B049

Requests Relief from ASME Section XI Requirements Re Welds Found to Be Partially Inaccessible During First 90% of Preservice Insp Baseline.Remaining 10% of Baseline Exams Should Be Completed Before June 1982

ML17276B049
Person / Time
Site:	Columbia
Issue date:	01/28/1982
From:	Bouchey G WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Tedesco R Office of Nuclear Reactor Regulation
References
GO2-82-121, NUDOCS 8202090224
Download: ML17276B049 (25)

Text

REGULATORY 'I RMATION DISTRIBUTION SYST (RIDS)

ACCESSION NBR:82020902?4 DOC ~ DATE: 8?/01/28 NOTARIZED! NO, DOCKET FACILt50-397 BYNAME WPPSS Nuclear Projecti Unit 2r Nashirigton Public Powe 05000397 AUTH AUTHOR AFF ILIATION BOUCHEYiG,D, washington 'Public Power Supply System RBCIP ~ NAME RECIPIENT AFFILIATION TEDESCOER ~ L, Assistant Director for Licensing

SUBJECT:

Requests relief from ASME Section XI requirements re welds found to be partially inaccessib'le during fit st 90K of

, preservice insp 'baseline, Remaining 10K of baseline exams should be completed before June 1982, DISTRIBUTION CODE: BOO IS COPIES:RECEIVED:LTR J ENCL > SIZE:.

NOTES:2 copies all matl:PM'5000397 TITLE: PSAR/FSAR AMOTS and Related,Correspondence REC IP IENT COPIES RECIPIENT COPIES IO CODE/NAME LTTR ENCL ID CODE/blAME LTTR ENCL ACTION: A/D LICENSNG 1 0 LIC BR P2 BC 1 0 L I C BR 0? LA 1 0 AULUCKER ~ 01 1 '1 INTtERNALe ELD 1 0 IE 06 3 3 IE/DEP/EPDB 35 1 IE/DEP/EPLB 36 3 3 MPA 1 0 NRR/DE/CEB 11 1 1 NRR/DE/EQB 13 3 NRR/DE/GB 28 2 2 NRR/DE/HGEB 30 2 '

2 NRR/DE/MEB 18 1 1 NRR/DE/MTEB 17 1 NRR/DE/QAB 21 1 1 NRR/DE/SAB 24 1 1 NRR/DE/SEB 25 1 1 NRR/DHFS/HFEBPO 1 1 NRR/DHFS/LQB 32 1 1 NRR/DHFS/OLB 3Q 1 1 NRR/OHFS/PTR820 1 1 NRR/DSI/AEB 26 1 1 NRR/DS I/ASB 27 1 1 NRR/DSI/CPB 10 1 1 NRR/DSI/CSB 09 1 1 NRR/DS I /ETSB 1? 1 1 NRR/OS I/ICSB 16 1 NRR/DSI/PSB 19 1 1 NRR/OS I/RAB 22 1 1 RSB 23 1 1 NRR/OST/LGB 33 1 1 04 1 1 EXTERNAL: ACRS 41 16 16 BNl (AMDTS ONLY) 1 1 FEMA REP DI V 39 1 1 LPDR 03 1 1 NRC PDR 02 1 1 NSIC 05 1 1 NTIS 1 1 TOTAL NUMBER OF COPIES REQUIRED: L'TTR 'f ENCL

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S t~gre Sl January 28, 1982 G02-82-121 Director, Office of Nuclear Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attention: R. L. Tedesco Assistant Director for Licensing Division of Licensing

Subject:

NUCLEAR PROJECT 2 ASME SECTION XI INSERVICE INSPECTION REQUEST FOR RELIEF NO. PSI-2-001

References:

a) G02-81-545, dated December 23, 1981, GD Bouchey (Supply System) to RL Tedesco (NRC), "Response to NRC Questions on the HNP-2 Preservice Inspection Program" b) Draft Memorandum, NV Johnson (NRC) to RL Tedesco (NRC),

"Meeting with HPPSS Concerning the Preservice Inspection Program on October 9, 1981" Reference a) transmitted the Supply System's responses to the Reference b) questions. This letter transmits a copy of Request for Relief from ASME Section XI requirements, PSI-2-001, which supplements responses to items 1, 2, and 13 in Reference b).

This Request for Relief represents welds found to be partially inaccessible during the first 90 percent of the Preservice Inspection (PSI) baseline.

The remaining ten percent of the PSI baseline exams should be completed peel

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R. L. Tedesco Page 2 Docket No. 50-397 before June 1982. At that time, Request for Relief PSI-2-001 will be updated to include all welds that did not meet Section XI examination requirements.

G. D. Bouchey - 370 Deputy Director, Safety and, Security DPR/sms Attachment cc: R. Auluck, NRC 0. Lageraaen, B&R NY H. R. Canter, B8R RO N. D. Lewis, EFSEC W. S. Chin, BPA F. A. HacLean, GE A. I. Cygelman, B&R RO A. Schwencer, NRC R. Feil, NRC Site R. E. Snaith, B&R NY H. R. Humm, NRC L. Santos, GE J. A. Forrest, B&R RO J. J. Verderber, B&R NY

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NOTES TO FOLLOWING WELD TABLES Isometric drawing numbers (Iso. No.) which start with a "1" such as MS-101 are Code Class 1 and Section XI Category B-J.

Isometric drawing numbers (Iso. No.) which start with a "2" such as MS-201 are Code Class 2 and Section XI Category C-F.

The entire reactor pressure vessel (RPV) was completely examined except for the small areas identified under remarks on the following RPV (category B-A) weld tables.

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RE(UEST FOR REI IEF NO. PSI-2-001 Component ASNE Class 1,Section XI Category 8-A* pressure retaining welds.

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in reactor pressure vessel. List attached.

ASNE Class 1,Section XI Category B-J 'pressure retaining welds in piping. List attached.

. ASNE Class 2,Section XI Category C-F pressure retaining welds in piping. List attached.

Code All of the subject welds were designed and fabricated to ASNE Section III Class 1 or 2. The Preservice Inspection is to be performed to the 1974 Edition SUmmer 1975 Addenda of ASNE Section XI.

Number ~cate or No.

f o 'Wel ds B-A 13 .

B-J 5 C-F Secti on XI Section XI requires examination of 100Ã of the pressure retaining Requirements welds in Categories B-A*, B-J and C-F be performed completely as a Preser vice Inspection'before initial plant startup. The following examinations are required:

All pressure retaining welds in Reactor vessel. volumetric 8-J Circumferential and longitudinal piping welds. volumetric Branch pipe connection welds exceeding 6-inch volumetric diameter.

Branch pipe connection welds 6-inch diameter and surface smaller.

Socket welds. surface Circumferential butt welds. volumetric Longitudinal welds joints in fittings. volumetric Branch pipe-to-, pipe welds joints. volumetric Basis for Relief is required from ASNE Section XI examination requirements Requesting on the basis of partial inaccessibility of the weld due to plant Relief design. The specific inaccessibility problem for each weld. is explained under remarks on the attached tables.

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Alternative The welds (except for the following) in this request for relief'are Examinations partially inaccessible to all examination methods.

20 RHR(1) A-4 (RHR-201)

. 20 RHR(1) B-4 '(RHR-207)

These two welds will be examined by UT in the areas where PT was not possible.

. Impact on There will be no adverse impact on plant quality and safety by Plant guality doing only a partial code examination of these weld'.

and Safety The Class 1 piping welds have passed radiographic and dye penetrant examinations in accordance with Section IIi.

2. The Class 2 piping welds have passed radiographic examination in accordance with Section III.

3. The Class 1 RPV welds have passed radiographic, magnetic particle and ultrasonic examinations in accordance wi th Section III..

4. All of the identified welds will be subject to a system pressure test in accordance with Section XI Class 1 or 2 requirements.

5. Leak detection systems identify significant leakage in the areas of the subject piping welds. Appropriate operator action would occur due to leak detection system alarms.

6. Alternate systems can bring the reactor to a safe shutdown.

7. Other similar welds in the vessel or same piping run will receive full code examinations. The integrity of the pressure boundary can thus be verified by sampling.

• Category B-A per 1977 Edition Summer 1978 Addenda, this includes both Category B-A and B-B welds per 1974 Edition, Summer 1975 Addenda. Category B-A and B-B have been com-bined into B-A in later codes. The NNP-2 PSI Program considers these Category B-A so the PSI Program will be consistent with the ISI Program.

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i CATEGORY .B-A SECTION III ISO. NO. HELD NUMBER DATA SHEET DESCRIPTION EXAM REIRRKS RPV-102 DC RPU-'090, 118, BOT HD MRD 8 32 MT, UT, RT See Note 2 080, 112, 100 108 RPV-102 DD RPU-091, 119, BOT HD MRD 9 92 MT, UT, RT See Note 2 081, 113, 101 109 RPV-102 DE RPU-092, 120, BOT HD MRD 8 152 MT, UT, RT See Note 2 082, 114, 102, 122 RPV-102 DF RPU-093, 121, BOT HD MRD 9 212 See Note 2 083, 115, 103, 123 Note. 1: Only 12" to 23" on each end of the weld, starting from the intersection of weld AJ, can be examined due to CRD penetrations and housings.

Note 2: Only 21" starting from the.: .

intersection of weld AA starting from the inter-and'4" section of weld AJ can be examined due to vessel support skirt. (Approxi- gP mately one foot is not being examined on each weld.)

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CATEGORY B-J and C-F DATA SEC. SECTION III ISO. NO. WELD NUtlBER SHEET X I DESCRI PT ION EXAM REfORKS NO. EXAM RHR-201 20 RHR(1) A-4 RHP 190 PT Pipe to Reducer RT No surface exam 330 -30 due to permanent obstruction (6" not examined). Alternate exam UT from 1 side.

RHR-207 18 RHR(1) B-7/ RHP-154 PT Branch Connector RT 1'," around 0 not examined due to perman-6 RHR(7)-2 ent (welded harlger) inter'ference.

RHR-207 20 RHR(1) B-4 RHP-201 PT Pipe to Elbow RT No surface exam 330 30 due to perman-ent obstruction (6" not examined).

Alternate exam UT from 1 side.

RHR-207 18 RHR(1) B-42 RHP-201 PT Pipe to Elbow 4" around 180 RT No exam obstructed by permanent hanger.

RFW-101 18 RFW(1) A-4 FWP-046 PT Pipe to Reducer RT/PT 2>~" around 0 not examined-welded "N" stamp.

RHR-106 12 RHR(1) B-11LDO. RHU-075 Elbow Seam 4" to 5'," due UT RT/PT No exam to branch connection (13;" not examined).

RRC-101 24 RRC(2) A-8LDI RRU-101 Elbow Seam 18" to 19" due to instrument UT RT/PT No exam line interference (1". not examined).

RRC-101 24 RRC(2) A-8LDO RRU-101 UT Elbow Seam RT/PT No exam 38" to 40" due to branch conn@etio (2" not examined).

RRC-102 24 RRC(1) B-6LDI RRU-112 UT Tee Seam RT/PT No exam 17" to 18" due to fitting (1" not examined).

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