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REGULATORY NFORMATION DISTR IBUT'ION S EM (R IDS)

ACCESSION NBR:8503220078 DOC ~ DATE: 85/03/08 NOTARIZED: NO DOCKETFACIL;!50 323 Diablo Canyon Nuclear Power- Plantg Unit 2E Pacific Ga 05000323

AUTH,NAME" AUTHOR AFFILIATIONSHIFFER

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PACIFIC GAS AND ELECTRIC COMPANY77 BEALE STREET ~ SAN FRANCISCO, CALIFORNIA94106 ~ (415) 781.4211 ~ TWX 910.372 6587

JAMES D. SMIPFKRVlCC PASSING

NVCSCAR PONtSR OSNSRATION

March 8, 1985

PGandE Letter No.: DCL-85-102

Mr. George W. Knighton, ChiefLicensing Branch No. 3Division of LicensingOffice of Nuclear Reactor RegulationU. S. Nuclear Regulatory CommissionWashington, D.C. 20555

Re: Docket No. 50-323Diablo Canyon Unit 2Piping Branch Connections

Dear Mr. Knighton:

The NRC Staff's letter dated February 25, 1985, requested that PGandE provideadditional information on the qualification of piping branch connections forDiablo Canyon Unit 2. PGandE responded to Item 1 of your letter onFebruary 27, 1985 (DCL-85-084). The response to Item 2 of your letter isenclosed. The enclosure contains branch connection area replacementverifications for connections in safety-related piping with combinedcharacteristics as identified in your letter. The verification resultsconfirm that the code requirements for area replacement are satisfied.

Kindly acknowledge receipt of this material on the enclosed copy of thisletter and return it in the enclosed addressed envelope.

Sincerely,

J. D ifferEnclosure

cc: R. T. DoddsJ. B. MartinE. C. Rodabaugh, NRC ConsultantB. Saffell, NRC ConsultantH. E. SchierlingService List

8503220078 850308PDR ADOCK 05000323A , PDR

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PGandE L 'r No.: DCL-85-102ENCLOSURE

DIABLO CANYON UNIT 1NRC REQUEST. FOR ADDITIONAL INFORMATION

(NRC Letter to PGandE dated February 25, 1985)

NRC Question 1

Regarding "Verification 2" in your submittal of January 25, 1985, you shouldverify the dimensions used for the "Meldolet" weld and provide a scaledrawing. You also should provide a verification for the area replacement inaccordance wi th NC-3640 or paragraph 104.3 of ANSI B31.1, 1973 Edition.

PGandE Res onse

This subject was addressed in PGandE letter DCL-85-084, datedFebruary 27, 1985.

NRC Question 2

Identify the branch connections in safety-related piping with the followingcombined characteristics:

a. Th/tmh g 1.5

b. do/Do $ 0.3

c. connection is not made with an ANSI B16.9 tee.

where:

Th = specified minimum wall thickness of pipe run

tmh = calculated required minimum wall thickness of pipe per ANSI B31.1,Equation .3, 1973 Edition

do = outside diameter of branch pipe

Do = outsi de diameter o f pi pe runIf there are no such branch connections, you should so indicate. Foreach branch connection with the above combined characteristics, providethe necessary area replacement verification 'in accordance withparagraph 104.3 of ANSI B31.1, 1973 Edition.

PGandE Res onse

Utilizing the logic shown in Attachment A, 13 branch connections (10Sweepolets, 2 Stub-ins with pad, and 1 Weldolet) with the abovecharacteristics require area replacement verification.

Branch connection area replacement verifications have been performed for the13 connections listed in Attachment B. The verifications for the connectionsare included in Attachment C. The Sweepolet area replacement verificationswere performed by the Sweepolet manufacturer, Bonney Forge.

0200S/0028K

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ATTACHMENT A

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ATTACHMENT B

CONNECTIONS REQUIRING AREA REPLACEMENT VERIFICATION

RunDesi nation

BranchDesi nation

Type ofConnection

Area Replacement (AR)Verification

- S2-221-18"

*S2-221-18"

*Sl-119-8"

*K14-585-28"

K14-586-28"

K14-583-28"

K14-584-28"

K16-554-16"

K16-555-16"

K16-555-16"

K16-556-16"

*K16-557-16"

*K16-3942-26"

S2-224-8"

S2-1988-8"

Sl-931-3"

K14-592-18"

K14-759-18"

K14-758-18"

K14-591-18"

K16-5266-6"

K16-5283-6"

K16-5264-6"

K16-5262-6"

K16-5260-6"

K16-5410-8"

Stub-in w/Pad

Stub-in w/Pad

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ATTACHMENT C

BRANCH CONNECTION VERIFICATIONS

0200S/0028K

BONNEY FORGE

AREA REPLACEMENT gl

~ ~ ~

PROGRAM NAME-SWEEP3/MiSUMMA

SM1T5T2*X5Yi

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RY OF DATA15880. 165. 432.8432. 875~ ~ 352. 1561.48288.8o64613818. 781

—.8431.9205

P 1415M .854D3 6 6.5D4 16D2 5.761Po ~ e 5X1 8)2X3 1. 718X4 '878J3 18X7 —.182L 5.761Erezk in 733READY

END OF PROGRAMREINF. AREA REG!'D. (SG. IN. )= 4.48282REINF. AREA AVAIL. (SQ. IN. )= 4.874~/ AREA REPLACED = 188. 746Ri(NEW)= .25Ri(CORf'.ODED)= .25CROTCH TH. (NEW)= 2.88355CRClTCH TH. (CORRODED)= 2.88355WHFN PCS=8, NC> DESIGN COND. WERE GIVEN 5DESIGN WAS PASED ON SPECIFIED RUN WALLEND OF PROGRAMPr e.al: in 76 '8READY

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DATA, SHEET

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SINEW

P ~~/-AP E S S LIRES /~A~ ALLOWABLE STRESSE j LONGITUDINAL W=LD JOINT FACTORY ~L. TEI,l~ Yi~/x4. ~r VAD2. ~+ coRR'D BoRE DIA. oF SWEEFOLETDE ~ SEE SKETCHe >LR 1 ~ CORR D. RADIUsCC 107

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B OHNEY HO. CUSTOMER NAME 6 P. 0. ~ OPEP ATOP DATEwI4'

T4 BRANCH THICKNESS ACQUIRED FOR PRESSURE OR—TS " tTHICKNESS AFTER DEDUCTING MILL TOL.E ~ lAND COAAOSION ALt OWANCE

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OF PROGRAI'IREINF. AREA RE(g'. (S(l.. IN. ) = 8.387 1REINF ~ AREA AVAIL. (SG>. IN ~ ) =- 15 3-', r1 AREA REPLACED = 183. 17Rl(NEW)= .25Rl(CORRODED>= .25CROTCH TH. (NEW)= 3.38543CROTCH TH. (CORRODED)= 3.38543WHEN P8:S=Q~ NO DESIGN COND. WEPF GI'.'ENDESIGN WAS PAGED 4>N SPE IF I ED R'!IJ WALIEND OF PROGRAMPrearm in 7628READY

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END oF PPOGRANREINF. AREA REQ'D. (SG!. IN. ) = 14 8536REINF. APE* AVAIL. (Std. IN. ) = 14. 9818

AREA PEPL*CED = 188. 863Ri (NEW) = .25R1 (CORRODF.D).= .2CRVTCM TH. (NEW)= 3.25827CROT H TH. (CORRODED)= 3.25827WHEN PES=Qy NO DESIGN COND. WERE GIVENDESIGN WAS PASED ON SPECIFIED RUN WALLEND OF PROGRANE'reek in '6 '8REr DY

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