LD-97-028, Part 21 Rept Re Contamination of Lubricant Which Has Led to Hardening of Lubricant in Certain Potter & Brumfield Mdr Relay Models 170-1 & 7032.Will Distribute Copy of Rept to Utils Having ABB-CE Designed Nuclear Steam Supply Sys

Part 21 Rept Re Contamination of Lubricant Which Has Led to Hardening of Lubricant in Certain Potter & Brumfield Mdr Relay Models 170-1 & 7032.Will Distribute Copy of Rept to Utils Having ABB-CE Designed Nuclear Steam Supply Sys

ML20211N407
Person / Time
Site:	Palo Verde, Arkansas Nuclear, Waterford, San Onofre
Issue date:	10/13/1997
From:	Rickard I ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY, ASEA BROWN BOVERI, INC.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-PT21-97 LD-97-028, LD-97-28, NUDOCS 9710160120
Download: ML20211N407 (5)

Text

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ABB October 13,1997 I.D 97 028 l Document Control Desk ,

U.S. Nuclear Regulatory Commission l Washington, DC 20555

Subject:

Report Pursuant to 10 CFR 21 Regarding Certain Models of Potter &

Brumfield Relays Gentlemen:

l The purpose of this letter is to notif fthe Nuclear Regulatory Commission of a defect pursuant to 10 CFR 21," Reporting of Defects and Noncompliance." The identified

" defect" is contamination ollubricant which has led to the hardening of the lubricant in l certain Potter & Brumfield Products Division MDR relay models 170-1 and 7032 such '

that the relays could fail to function. These relays are used in the Plant Protection System (i.e., Engineered Safety Features Actuation System and Reactor Protection System).

Waterford Stiam Electric Station (WSES) has informed ABB.CE of four failed Potter &

Brumfield Type MDR rotary relays. Although not all of the failed relays were supplied by ABB.CE, they were manufactured by Potter & Brumfield at the same facility utilizing similar components, lubrication material, and techniques The failed relays initially reported were limited to AC versions of the MDR Relay. A recently reported failure of a Model 7032 (DC Version) relay by WSES may indicate that the problem applies to both AC and DC voltage relays Potter & Brumfield has verbally indicated that they believe model MDR relays potentially affected are date coded 94XX, and that earlier (93XX) and later (95XX) date coded relays are not affected.

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WSES had a failure analysis of each relay performed by Southwest Research Institute after I g

removal of the relay from service. In all cases, Southwest Research Institute identified the '

problem to be hardened bearinn lubricant.

pfi' Potter & B.umfield's initial evaluation of the reported problem is that the lubricant

/y hardening effect is likely due to contaminants introduced into the lubricant and potentially excessive application oflvbricant which occurred during assembly of the suspect relays 9710160120 971013

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E" 8n* MyElylLliMI ABB Combustion Engineering Nuclear Operations em- es ., = .o e. = t.,. - , w ,,,,

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UCT-13-1937 '13i42 ~ AED CE NUC STt13 DEVEt 0Pt1T ' 05020552d3' P.53/05

. LD.97 028 Page 2 ABB.GE's investigation to date has revealed that Potter & Drumfield supplied approximately 96 relays of the rnodels identified above to ABB CE that are date coded 94XX. These have been supplied to various nuclear power plants as delineated in the attachment as part of the infom1ation specifically required by 10 CrR 21.

Very truly yours, COMBUSTION E ' NEERING, Inc,

!an c ard, Director Operations Licensing cc: M. F. Darnoski(ABB-CE) 1 4

l

-- - -- M

• OCT-13-1997 13 43 AED CE NUC SW15 [EVELC*11T E60 805 5303 P.04/05 Attachment to 1

LD.97 028

, ABB Combustion Engineering Nuclear Operations 10 CFR 21 Renort of a Defect or Failure to Comniv The following information is provided pursuant to 10 CFR 21.21 (c)(4):

(l) Name and address of the Individualinforming the Commission:

Ian C. Rickard, Director Operations Licensing Combustion Engineering 2000 Day liill Road Windsor, CT 06095 0500 (II) Identification of thefacility, the activity, or the basic component suppliedfor suchfacility or such activity within the UnitedStates whichfalls to comply or contains a defect:

The basic components are Potter & Brumfield MDR relay models 1701 and 7032.

Information from Potter & Brumfield indicates that the concern potentially affects not only the 1701 and 7032, but also the 7033 and 7034 relays date-coded 94XX.

(Ill) Identification of thefirm constructing thefacility or supplying the basic component whichfalls to congly or contains a defect:

The relays were supplied to ABB.CE by Potter & Brumfield and were subsequently provided to the nuclear plants identified in item (vi) below by:

l Combustion Enginecting, Inc.

2000 Dayliill Road 4

Windsor, CT 06095 0500 (iv) Nature of defect orfailure to comply and the safey hazard which is created or could be created by such defect orfailure to comply:

The defect is lubricant contamination and excessive application oflubricant leading

, to hardening of the lubricant in Potter & Brumfield MDR relay models (date coded 94XX) 170-tand 7032 and potentially 7033 and 7034 such that the relays could fail to function. These relays are used in the Plant Protection System (i.e.,

Engineered Safety Features Actuation System and Reactor Protection System),

and their failure could prevent proper functioning of the Plant Protection System l

[-

OCT-13-19 N l 3 43 PID CE ffJC STMS DEVELOPMT 000 205 $203 P.05/05 2 Attachment to e

LD 97 028 1

(v) , The date on which the Igormation ofsuch defect orfailure to cowly was obtained:

ABB.CE received information regarding failures of tne subject relays on August 6, 1997, l

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(vi) in the case of a basic comonent which contains a defect orfalls to comply, the

\

number andlocation of allsuch components in use at, suppIledfor, or being suppliedfor one or morefacilities or activitics subject to the regulations of this part:

ABB CE has supplied MDR relays as replacement or original equiprnent as f?llows:

Utility Plant Model Nos Arizona Public PVNGS I,2,3 7032,7033,7034 Serv ce Co Ent:rry ANO2 7032,7033,7034,170 1 Entercy Waterford 3 7032,7033,7034,170 1 Edison SONGS 2, 3 7032,7033,7034,170 1 International, Inc These relays are normally energized, and are deenergized to actuate.

(vii) The corrective action which has been, is being, or will be taken; the name of the Individual responsiblefor the action; and the length of time that has been or will be taken to complete the action:

ABB.CE is currently evaluating potential corrective actions.

(viii) A ny advice related to the defect orfsilure to comply about thefacility, activity, or basic component that has been, is being, or will be given to purchasers or licensees:

In parallel with providing this 10 CFR 21 report to the NRC, ABB CE will distribute copies of the report to utilities having an ABB.CE designed Nuclear Steam Supply System Those utilities will also be provided with ABB-CE's recommended corrective actions, when developed.

TOTAL P.05

c GENERAL INFORMATION or OTHER EVENT NUMBER: 33077 LICENSEE: ABB COMBUSTION ENGINEERING NOTIFICATION DATE: 10/13/97 CITY: WINDSOR REGION: 1 NOTIFICATION TIME: 13:42 [ET)

COUNTY: STATE: CT EVENT DATE: 08/06/97 LICENSE #: AGREEMENT: N EVENT TIME: 00:00(EDT)

DOCRET: LAST UPDATE DATE: 10/13/97  ;

NOTIFICATIONS JOHN PELLET RDO NRC NOTIFIED BY: HESS VERN HODGE NRR HQ OPS OFFICER: CHAUNCEY GOULD EMERGENCY CLASS: NOT APPLICABLE 10 CPR SECTION:

CCCC 21.21 UNSPECIFIED PARAGRAPH EVENT TEXT ABB COMBUSTION REPORTED A PART 21 ON CERTAIN MODELS OF POTTER & BRUMFIELD RELAYS. THEY HAVE IDENTIFIED THE " DEFECT" AS CONTAMINATION OF LUBRICANT WHICH HAS LEAD TO THE HARDENING OF THE LUBRICANT IN CERTAIN POTTER &

BRUMPIELD PRODUCTS DIVISION MDR RELAYS (MODELS "370-1" AND "7032"). THIS -

" DEFECT" COULD RESULT IN RELAY FAILURE. THESE RELAYS ARE USED IN THE PLANT PROTECTION SYSTEM. THERE IS ALSO THE POTENTIAL FOR RELAY MODELS "7033" AND "7034" TO FAIL TO FUNCTION CORRECTLY. THESE RELAYS HAVE BEEN SUPPLIED TO PALO VERDE 1, 2 AND 3, ARKANSAS NUCLEAR ONE UNIT 2, WATERFORD 3, AND SAN ONOFRE 2 AND 3. ABB-CE IS CURRENTLY EVALUATING POTENTIAL CORRECTIVE ACTIONS WHICH WILL BE PROVIDED TO THE UTILITIES WITH ABB-CE DESIGNED -

NUCLEAR STEAM SUPPLY SYSTEMS. ,

T 1

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