ML20128E462

Forwards Rev 1 to Inservice Insp Exam Rept on 840331-0609. Previously Reported Indication within Acceptance Criteria of Section XI of ASME Code.Supplementary Exams Not Required

ML20128E462
Person / Time
Site:	Yankee Rowe
Issue date:	05/22/1985
From:	Kay J YANKEE ATOMIC ELECTRIC CO.
To:	Zwolinski J Office of Nuclear Reactor Regulation
Shared Package
ML20128E467	List: ML20128E462 ML20128E485
References
FYR-85-60, NUDOCS 8505290393
Download: ML20128E462 (2)

Text

g Te'epho"c(* ")*' -*'oo YANKEE ATOMIC ELECTRIC COMPANY TWX 710-380-7619 p3 .

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['q ~ '1671 Worcester Road, Framingham, Massachusetts 01701 2.C.2.1 FYR 85-60

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[ , May 22, 1985 United States Nuclear Regulatory Commission Washington, D. C. 20555 Attention: Mr. John A. Zwolinski, Chief Operating ReactorsgBranch No. 5 Division of Licensing'

References:

(a) License No. DPR-3 (Docket No. 50-29)

(b) YARC Letter to'USERC, dated September 14, 1984 (FYR 84-96)

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Subject:

Revision'to Yankee Inservice Inspection Report

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Dear Sir:

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Reference (a) submitted the Inservice Inspection Report for the Yankee

-Nuclear Power Station. 'This report outlined the results of inspections performed in accordance with Section II of the ASME Boiler.and Pressure Vessel Code for the examination period March 31, 1984 through June 9, 1984.

' Included in the referenced report was a detailed discussion of the, examination of the full penetration welds in the reactor pressure vessel nozzles. The examination of all eight-nozzles revealed one indication which

-was evaluated and found by analysis to be acceptable under the provisions of I

Section II, IWB-3600.

Subsequent'to the subelttal of the referenced report, we continued-to l evaluate the results of the nozzle inspections. The evaluation proved that the examination. techniques yielded conservative results and that the actual

. size of the previously analyzed indication was within acceptable limits. The results.of the testing program demonstrated that the size of the original indication was more than double the actual size and that d en the appropriate corrections were made, this indication is allowable under the acceptance criteria of Section II, IWB-3512.1.

4 The attached Revision'1 to the Inservice Inspection Report details the-

. evaluation of the indication. Attachment C to the report covers the testing

- program, ~ data evaluation, and conclusions.

Based upon this new information, we conclude that the previously reported indication is actually within the acceptance criteria of Section II and that q

.no supplementary examinations of this indication are required.

8505290393 e50522 n.

PDR ADOCK 05000029PDR

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United States Nuclear Regulatory Consnission May 22, 1985 Attention: Mr.' John A. Zwolinski Page 2 We trust that this information is acceptable to you; however, should you have any questions, please contact us.

Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY

. A. Kay Senior Project Engineer - Licensing JAK/ds

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