ML20150E726

Forwards Flow Distribution & Tube Vibration:Evaluation of Sys 80 Steam Generator Tube Lane/Economizer Corner Region, in Support of C-E 870918 Request That Steam Generator Tube Vibration Issue Be Closed

ML20150E726
Person / Time
Site:	05000470
Issue date:	07/01/1988
From:	Scherer A ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY
To:	Vissing G Office of Nuclear Reactor Regulation
Shared Package
ML20150E730	List: LD-88-049, Flow Distribution & Tube Vibration:Evaluation of Sys 80 Steam Generator Tube Lane/Economizer Corner Region ML20150E726
References
LD-88-049, LD-88-49, NUDOCS 8807150268
Download: ML20150E726 (2)

Text

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g I*= D CONIBUSTION ENGINEERING July 1, 1988 LD-88-049 Docket No. STN 50-470F Mr. Guy Vissing, Project Manager Standardization and Non-Power Reactor Project Directorate Office of Nuclear Regulation Attn: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D. C. 20555

Subject:

Steam Generator Tube Vibration Issue Closeout on the CESSAR-F Docket

Reference:

Letter, LD-87-052, A. E. Scherer (C-E) to F. J. Miraglia (NRC), dated September 18, 1987

Dear Mr. Vissing:

The reference letter requested that the Steam Generator Tube Vibration Issue be closed on the Combustion Engineering Standard Safety Analysis i Report - FSAR (CESSAR-F) docket. This letter reiterates that request and provides the additional technical documentation which was requested by NRC reviewers.

At a meeting held ogJanuary 27, 1988, C-E overviewed to NRC reviewers the initial System 80 steam generator design program, the tube wear evaluation program resulting from the vibration-induced wear observed in the coldside corner region of Palo Verde Units 1 and 2, and the plugging, staking, inspection, and monitoring program which was implemented as the corrective measure. At the conclusion of C-E's presentation, the NRC reviewers that were present agreed that the issue could be closed for the System 80 plants which currently reference CESSAR-F (PVNGS 1, 2, 3 and WNP-3) provided specific, additional documentation is submitted for review.

In fulfillment of this request, we are submitting the attached material.

Enclosure (1) overviews Combustion Engineering's tube wear evaluation program and the corrective actions which were taken. Enclosures (2) and (3), respectiveiy, provide a CESSAR change package to document the potential for steam generator leakage to occur and the tube burst test results from the Bat Wing Evaluation Program. C-E believes this submittal fulfills our remaining requirements and that this issue is now resolved. 60k 3 I

I I

Power Systems 1000 Prospect Hdi Road (203) 688 1911 Combustion Engineenng, Inc. Post Offce Box 500 Telex: 99297 h son Conn e N m 8807150268 880701 PDR A

ADOCK 05000470 PDC

M

, - , , , . . Mr. Guy Vissing LD-88-049 July 1, 1988 Page 2 All of the evidence to date continues to support the conclusion that no design changes are necessary to the operating steam generators in order to assure continued safe operation. We believe that the plugging, staking, monitoring, and inspection program provides an adequate level of safety for all plants which currently reference CESSAR-F.

Should you have any questions regarding this transmittal, please call me or T. L. Cameron of my staff at (203) 285-5217.

Very truly yours, COMLUSTION ENGINEERING, INC.

sm A. E.rScherer Director Nuclear Licensing AES:ss

Enclosures:

As Stated