ML20244D062

Informs That Util Will Pursue Change from Displacement to Velocity Vibration Measurements by 891010

ML20244D062
Person / Time
Site:	Mcguire, McGuire
Issue date:	06/06/1989
From:	Tucker H DUKE POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
TAC-61271, NUDOCS 8906160076
Download: ML20244D062 (3)

Text

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e Dure POWER GOMPANY t P.O. DOX 33189 - ,

CHARLOTrE, N.O. 28242 ..

HALH. TUCKER .

TEI.EP,EONE , 1' vsom emenanswr (7o4) 373 4 531 mmi. man enoperonon 1

June 6, 1989-i

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U. S. Nuclear Regulatory, Commission Document Control. Desk . .

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'Washingt.,n, D.C. 20555 (CN's 1-10)

Subject:

. : McGuire Nuclear Station, Units 1 and 2~ .2

~ Docket Nos. 50-369 and.50-370 -l Pump.and Valve Inservice Testing Program .

NRC Review / Program Revision 11 (Unit 1) and 7 (Unit 2)

[Re: Relief Request No. 88-07)~

(TACS'61271/61272)

Commitments Implementation Update Gentlemen J

My letter of October 31, 1988 submitted (pursuant to 10CFR50.'4 and 50.55a(g))

Unit 1 Revision 11 and Unit 2 Revision 7 of the'McGuire Nuclear Station Pump and Valve Inservice Testing (IST) Program. That comprehensive revision reflected the results of a meeting between Duke Power Company and NRC'(with technical assistance from their contracted reviewer, EG&G Idaho, Inc.) held August 16.'and--

17, 1988 to finalize the IST Program. Among the issues-discussed during the meeting, as documented in Mr. D. S. Hood's (NRC/0NRR) letter to me-dated

.i September 8,- 1988 (Ref. Pump Testing Program' questions Nos. 3,:4,.and 5),'were- -j the accuracy of Duke's portable vibration instrumentation, the Pump Vibration-Monitoring Program units utilized, and bearing temperature measurement.

requirements. 6 As a result of the above mentioned discussions,' Notes 2 and 3 were included in.

'IST Manual Section I.1, along with General Relief Requests B and C in Section l 1.3, in the subject revisions. These noted that McGuire's vibration measurement' f

accuracy is 11%, and that the vibration measuring equipment would be upgraded  ;

to meet the IWP instrument accuracy requirement and vibration measurements 1 -!

changed from displacement to velocity by June.1, 1989.(after changing to velocity j

vibration measurements, bearing temperature measurements would be droppe'd from j

the IST Program). .

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l This letter is to inform you that the June 1, 1989.date was.not met. ' Duke'has ^l

. investigated the available vibration measuring-equipment to evaluate which. j machine could best meet the needs of~our three nuclear stations (McGuire, Oconee, i and Catawba).. This evaluation'is still in progress and has encountered several- i delays. Although the vibration measuring equipment to be used by each stationi l 1

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_[ U. S. Nuclear' Regulatory Commission.

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.has been' determined, it has been discovered this equipment may not meet the 'l vibration instrumentation requirementsLof IWP:(and OM-6)'. Plans have been d

--developed.to determine the best obtainable' accuracy for this equipment.- Relief. ,i will be requested for'IWP Vibration Monitoring requirements that'are . .

'l impractical. Also, due to delays caused' by the unexpected , steam generator: tube ~  ;;

rupture octage, McGuire has not yet implemented'the change from displacement lto R velocity' vibration measurements. Presently, McGuire is measuring displacement ~  !

and performing bearing stabilization in accordance with'IWP (General ReliefL l

. Requests I.3 B and C have not been exercised for either unit). .1

. Duke is pursuing IWP vibration accuracy requirements and hopes'to resolve the' problems in the near future for all three nuclear stations.' McGuire'is pursuing

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l the change from displacement to' velocity vibration measurements and plans'to- 1 achieve implementation by October 10,-1989.

If there are any questions on this matter, or if: additional information is -)

required (especially with respect to any impacts on the McGuire IST Program SER-  ;

which is currently being written, as discussed in my May 16, 1989 letter), please I advise.

Very truly yours,.  ;

i (L__, i sad 5/(2I j llal B. Tucker l

,1 PBN169/lcs l I

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. , U 'S. Nuclear Regulatory Commission i

Page 3 l June 6, 1989' j xc: Mr. S. D. Ebneter.

Regional Administrator,. Region 11-U.S..' Nuclear Regulatory Commission -l 101 Marietta St., NW, Suite 2900 Atlanta, Georgia 30323 (CN11)

Mr. Herb Rockhold EG&G Idaho, Inc.

Idaho National Engineering Laboratory 1520 Sawtelle Street  :

Idaho Falls, Idaho -83402 (CN12)

Mr. Darl Hood, Project Manager Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington,.D.C. . 20555 l

Mr. P. K. VanDoorn j NRC Resident Inspector J McGuire Nuclear Station j I

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