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Forwards Relief Requests NDE-047 & NDE-048 for North Anna Power Station,Unit 1 Re ASME Section XI ISI Program
	ML20196F115
Person / Time
Site:	North Anna
Issue date:	06/22/1999
From:	Hartz L; VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	; NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
	99-316, NUDOCS 9906290133
	Download: ML20196F115 (21)
	v • d • e

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YIRGINEA EI.ECTRIC ANI) I'OW E R C()M i% N )*

NIC11M()NI), VIRGINI A 2326l June 22, 1999 United States Nuclear Regulatory Commission Serial No.99-316 Attention: Document Control Desk NL&OS/ETS Washington, D.C. 20555 Docket No. 50-338 License Nos. NPF-4 Gentlemen:

VIRGINlA ELECTR!C AND POWER COMPANY NORTH ANNA POWER STATION UNIT 1 ASME SECTION XI INSERVICE INSPECTION PROGRAM RELIEF REQUESTS During the recent refueling outage, North Anna Power Station Unit 1 completed examinations in the third period of the second ten-year interval. Examinations were conducted to the requirements of the 1983 Edition of ASME Section XI. In several instances interferences or weld geometry prohibited the complete examination of the welds.

Pursuant to 10 CFR 50.55a (g) 5, relief is requested from certain requirements of the ASME Section XI Code associated with examinations where only partial coverage could be obtained. Relief requests NDE-047 and NDE-048 are attached and provide the bases of these requests.

These relief requests have been approved by the Station Nuclear Safety and Operating Committee. If you have questions concerning these requests, please contact us.

Very truly yours, L. N. Hartz Vice President - Nuclear Engineering and Services Attachment fr /

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Commitments made in this letter: None 9906290133 990622 PDR ADOCK 05000338 G PDR

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cc: U. S. Nuclear Regulatory Commission Region ll Atlanta Federal Center 61 Forsyth St., SW, Suite 23T85 Atlanta, Georgia 30303 Mr. M. J. Morgan NRC Senior Resident inspector North Anna Power Station Mr. M. Grace Authorized Nuclear inspector North Anna Power Station Mr. J. A. Reasor Old Dominion Electric Cooperative innsbrook Corporate Center 4210 Dominion Blvd.

Glen Allen, Virginia 23260

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Attachment Relief Requests NDE-47 and 48 Virginia Electric and Power Company North Anna Power Station Unit 1

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RELIEF REOUEST NDE-47 I. IDENTIFICATION OF COMPONENTS 3 Mark / Weld # Line# Drawinn# Class 38 ' 271/2"-RC-6-250lR-Q1 11715-WMKS-0109F-1 1 N-SE29 IN. 29"-RC-7-2501R-Ql 11715-WMKS-RC-E-1C.2 1 N-SE31 IN. 31"-RC-8-250lR-Q1 11715-WMKS-RC-E-IC.2 1 l

11. IMPRACTICABLE CODE REQUIREMENTS The 1983 edition, Summer 983 Addenda (inclusive) of ASME Section XI in Table IWB-2500-1 does not allow any limitations to the required volumetric and surface examinations.

Code Case N-460,' Alternative Examination Coverage for Class 1 and Class 2 Welds, allows a reduction in coverage, ifit is less than 10%.

III. BASIS FOR RELIEF -

l The components listed above have been examined to the extent practical as required by the Code. Due to interference of other components or weld joint geometry, the reduction in coverage for the listed components was greater than 10%. Table NDE-47-1 is provided detailing the limitations experienced. Amplifying sketches are also provided. Alternative l components could not be substituted for examination due to the mandatory selection requirements of the Code.

IV. ALTERNATE PROVISIONS It is proposed that the examinations already completed at the reduced coverage le counted ;

as meeting the Code requirements. l

[ .V. STATUS J

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RELIEF REOUEST NDE48 I. IDENTIFICATION OF COMPONENTS Mark / Weld # Line# Drawinn#

Class i ~l CH-FL-4B 11715-WMKS-CH-FL-4B 2 l 2 CH-FL-4B 11715-WMKS-CH-FL-4B 2 L 1 SI-TK-2 11715-WMKS-SI-TK-2 2 l 3 SI-TK-2 11715-WMKS-SI-TK-2 2 4 SI-TK-2 11715-WMKS.SI-TK-2 2 l 11. IMPRACTICABLE CODE REQUIREMIWTS l

The 1983 edition, Summer 1983 Addenda (inclusive) of ASME Section XI in Table IWC-2500-l'does not allow any limitations to the required volumetric and surface examinations.

Code Case N-460 Alternative Examination Coverage for Class I and Class 2 Welds, allows a reduction in coverage, ifit is less than 10%.

III. BASIS FOR RELIEF' The components listed above have been examined to the extent practical as required by the Code. Due to interference of other components or weld joint geometry the reduction in coverage for the listed components was greater than 10%. Tables NDE-48-1,2,3,4 and 5 are provided detailing the limitations experienced. Amplifying sketches are also provided.

Alternative components could not be substituted for examination due to the mandatory selection requirements of the Code.

There are two examinations for Weld 1 on SI-TK-2 that are subject to this relief request.

One examination was the normally schedule Section XI exam and the other was an expansion examination due to an indication found on Weld 2 on SI-TK-2. The examinations cover different portions ofWeld 1.

' IV. ALTERNATE PROVISIONS

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It is proposed that the examinations already completed at the reduced coverage be counted as meeting the Code requirements.

V. STATUS Pending.

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