ML17251A498

Part 21 Rept Re Degradation to Pumping Ring from RHR Pumps Supplied by Pacific Pump,Inc & Mechanical Seal Supplied by Crane Packing Co.Conditon Technically Not 10CFR21 Reportable Due to 1978 Date of Occurrence

ML17251A498
Person / Time
Site:	Ginna
Issue date:	05/12/1989
From:	Mecredy R ROCHESTER GAS & ELECTRIC CORP.
To:	Murley T Office of Nuclear Reactor Regulation
References
REF-PT21-89, REF-PT21-89-079-000 PT21-89-079-000, PT21-89-79, NUDOCS 8905250264
Download: ML17251A498 (7)

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.ACCELERATED DlS'JBUTION DEMONSTRATION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:8905250264 DOC.DATE: 89/05/12 NOTARIZED: NO DOCKET FACIL:50-244 Robert Emmet Ginna Nuclear Plant, Unit 1, Rochester G 05000244 AUTH. NAME AUTHOR AFFILIATION MECREDY,R.C. Rochester Gas & Electric Corp.

RECIP.NAME 'ECIPIENT AFFILIATION MURLEY.,T.E. Office of Nuclear Reactor Regulation, Director (Post 870411 R

SUBJECT:

Part 21 rept re defect consisting of interference between mechanical seal pumping ring 6 pump discharge housing. j DISTRIBUTION CODE: IEISD COPIES RECEIVED:LTR TITLE: Part 21 Rept (50 DKT) 2 ENCL ( SIZE: D NOTES:License Exp date in accordance with 10CFR2,2.109(9/19/72). 05000244 S RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD1-3 LA 1 0 PD1-3 PD 1 1 JOHNSON,A 1 1 INTERNAL: AEOD/DOA 1 1 AEOD/DS P/TPAB 1 1 IRM TECH ADV l." 1 IRM/DCTS/DAB 1 1 NRR CRUTCHFIELD 1 1 NRR VARGA,S 1 1 NRR/DEST/ADE 8H 1 1 NRR/DEST/ADS 7E 1 1 NRR/DLPQ/PEB 10 1 1 NRR/DOEA/GCB 11 1 1 NRR/DRI B 9D 1 1 NUDOCS-ABSTRACT 1 1 R 01 1 1 RES/DSIR/EIB 1 1 RGN1 1 1 RGN2 1 1 RGN3 1 1 RGN4 1 1 RGN5 1 1 EXTERNAL: INPO RECORD CTR 1 1 LPDR 1 1 NRC PDR 1 1 NSIC SILVER,E 1 .1 R

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/'PIE//I//jfll ROCHESTER GAS AND ELECTRIC CORPORATION o 89 EAST AVENUE, ROCHESTER, N.K 14649 0001 TCLCPHONF Ance cooL 7ie 546.2700 May 12, 1989 Dr. Thomas E. Murley, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission 8'ashi ngton, DC 20555

Subject:

Notificat'ion of 10CFR Part'1 R.E. Ginna Nuclear Power Station Docket No. 50-244 Licensee No. DPR-18

Dear Mr. Murley:

Rochester Gas and Electric is submitting the attached 10CFR Part 21 Evaluation and Notification. The notification concerns a defect in design of two (2) Residual Heat Removal Pumps supplied by Pacific Pump, Inc. of Los Angeles, CA. The defect consist of an interference between the mechanical seal pumping ring and the pump discharge housing.

The defective designed pumping rings were installed in 1969, during the construction phase, as a result of a mechanical seal modi ficati on. The mechanical seal was suppli ed by Crane Packing Company. Due to the date of occurrence, the condition is technically not 10CFR Part 21 reportable. However, due t'o the significance of'he potential pump degradation, Rochest'er Gas and Electric is submit'ting voluntary notification.

i Specific information regarding fai lure dent'ifi cation and corrective act'i on taken are detailed on the enclosed Should further information be required, please contact Mr.

Att'achment'.

Thomas Marl ow, Superi ntendent of Gi nna Support Servi ces on 315/524-4446.

S905250264 890Si2 ADOCK 05000244 PDC

Page 2 10CFR Part 21 May 12, 1989 Very truly yours, Robert C. Me red General Manager Nuclear Production xc'r. William T. Russell, U.S. Nuclear Regulatory Regional Administrator Commission Region 475 I

Allendale Road King of'russia, PA 2.9406 zc: Ginna Senior Resident Inspector

I Attachment I Name: Robert C. Mecredy

Title:

General Manager Nuclear Production Facility: R.E. Ginna Nuclear Power Plant Docket No.: 50-244 Basic Component: RHR Pumps Supplier: Pacific Pump Inc., Los Angeles, CA Sub-Suppli er: Crane Packing Company Nature of Defect: Mechanical seal pump ring interference with pump discharge housing.

In discussion wi th Original Equipment Manufacturer, discovered during a root cause i nvesti gati on, there was a di mensi onal tolerance issue between the originally supplied mechanical seal outside diameter and the pump casing bore inside diameter. It was determined the mechanical seals were changed out during the plant construction phase and replaced with an alternate mechanical seal. Apparently, at this time, the original pumping ring was replaced with a new style ring with no attention paid to the impact of this change with respect to pump casing bore inside diameter.

Rubbing between the pumping ring and the pump housing could cause degradation to the pumping ring with the potential for damage to the pump rotating assembly.

Condition is technically not Part 22 violation due to date of occurrence (prior to 2978).

Date obtained: April 28, 2989 Basic Components Affected:

Number: 2 Locati on: AuxiliaryBuilding, Sub-basement Corrective Action: Machined outside diameter of pumping ring at supplier <s direction to permit proper placement in pump discharge housing.

Responsible Individual for Action:

Thomas A. Marlow, Superintendent Ginna Support Services Time to Complete Action:

Action 1989.

was completed on both pumps Apri l 29, Advice Related to Defect':

Vendor supplied repair direction.

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