View source for LD-97-033, Part 21 Rept Re Defect in Potter & Brumfield Mdr Relays, Models 170-1 & 7032.Extended Problem to Include All Mdr Relay Models W/Date Codes 93XX-95XX.Root Cause Analysis, Written Rept & Recommended Corrective Actions Due by 971201

{{Adams
| number = ML20199H292
| issue date = 11/20/1997
| title = Part 21 Rept Re Defect in Potter & Brumfield Mdr Relays, Models 170-1 & 7032.Extended Problem to Include All Mdr Relay Models W/Date Codes 93XX-95XX.Root Cause Analysis, Written Rept & Recommended Corrective Actions Due by 971201
| author name = Rickard I
| author affiliation = ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY, ASEA BROWN BOVERI, INC.
| addressee name = 
| addressee affiliation = NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
| docket = 05000361, 05000362, 05000368, 05000382, 05000528, 05000529, 05000530
| license number = 
| contact person = 
| case reference number = REF-PT21-97
| document report number = LD-97-033, LD-97-33, NUDOCS 9711260073
| document type = DEFICIENCY REPORTS (PER 10CFR50.55E &amp; PART 21), TEXT-SAFETY REPORT
| page count = 3
}}

=Text=
{{#Wiki_filter:tOJ-20-1997 15:10                  ntD CE TOC STt13 DEVELOPf1T                     EO 2C5 5203     P.02/03 ABB November 20,1997 LD 97 033 Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555

==Subject:==
Additional Infonnation Pursuant to iO CFR 21 Regarding Certain Modds of Potte- & Bnunfield Relays

==Reference:==
: 1. C. Rickard. " Report Pursuant to 10 CFR 21 Regarding Certain Models of Potter & Bnunfield Relays," LD 97 028, October 13,1997
           .' ::lis.w The purtw of this letter is to notify the Nuclear Regulatory Commission of additional information concerning the defect pursuant to 10 CFR 21," Reporting of Defects and Noncompliance," that wa: reported in the referenced letter. The identified "defcet"is contamination oflubricant which has led to the hardening of the lubricant in certain Potter & Brumfield Products Division MDR relay models 1701 and 7032 such that the relays could fail to function. For the applications for which ABB CE has supplied these relays, failure to function is a failure of the relays to open when deenergized. These relays are used in the Plant Protection System (i.e., Engineered Safety Features Actuation System and Reactor Protection System).
In the referenced report to the Nuclear Regulatory Commission, it was stated that Potter
         & Brumfield had 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. Potter & Brumfield's initial evaluation of the reported problem is that the lubricant hardening effect is likely due to contaminants introduced into the            y lubricant and potentially excessive application oflubricant which occurred during                '[ j assembly of the suspect relays. During a conference call hela with Potter & Brumfield on November 17,1997. ABB CE was infonned that this lubricant contamination concern is now potentially extended to include MDR relay models manufactured with date codes                gg 93XX through 95XX. During this conference call, ABB-CE learned that Potter &
Brumfield instituted a design change (non lubricated bearings to lubricated bearings)
                                                                                                      'f 7711260073 971120 PDR 8        ADOCK 05000361 PDR ABB Combustion Engineering Nuclear Operations g    g
                                                * ~ ~ ~
* a60101                                                                          pH E N))!!}H$lll;ll

   '                                                    ~
gy.20-1997 15810             ~^ABB' CE i4X'STris tEVELOPr1T                     060 205 5203       P.03/03 T
  .-
* LD 97 033 Page 2 in 1988. Potter & Brumfield is reviewing its bearing lubrication process and the need for
        . . bearing lubrication for the low cycle nuclear power plant applications for which ABB.CE has provided the relays This review also includes evaluation of the affected date code period and affected models back to the time that the design change was made. Potter &
Brumfield has committed to complete its root cause analysis on the failure mechanism and issue a written report which includes recommended corrective actions and detailed date code identification by December 1,1997.
ABB.CE will inform its customers of this change in applicability by copy of this letter.
Very truly yours.
COMBUSTION ENGINEERING,Inc.
l                                                              . [ M# 4 lan C. Rickard, Director Operations Licensing ec:      M. F. Bamoski (ABB.CE)
TOTAL P.03

I GENERAL INFORMATION or OTHER                         EVENT NUMBER:   33077     l
_J 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)
DOCKET:                                         LAST UPDATE DATE: 11/20/97 NOTIFICATIONS JOHN PELLET           RDO NRC NOTIFIED BY: HESS                               VERN HODGE            NRR HQ OPS OFFICER: CHAUNCEY GOULD EMERGENCY CLASS: NOT APPLICABLE 10 CFR SECTION:
CCCC 21.21                   UNSPECIFIED PARAGRAPH EVENT TEXT ABB COMBUSTION REPORTED A PART 21 ON CERTAIN MODELS OF POTTER & BRUMFIELD RELAYS. TilEY HAVE IDENTIFIED Tile " DEFECT" AS CONTAMINATION OF LUBRICANT WHICH HAS LEAD TO Tile HARDENING OF THE LUBRICANT IN CERTAIN POTTER &
BRUMFIELD PRODUCTS DIVISION MDR RELAYS (MODELS "170-1" 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 IMVE 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 CURRENTI Y EVALUATING POTENTIAL CORRECTIVE ACTIONS WilICH WILL BE PROVIDED TO THE UTILITIES WITH ABB-CE DESIGNED NUCLEAR STEAM SUPPLY SYSTEMS.
    **
* UPDATE AT 1510 BY FAX FROM HESS ENTERED BY JONES * *
* POTTER & BRUMFIELD, AS OF A CONFERENCE CALL WITH ABB ON NOVEMBER 17, 1997, HAS EXTENDED THE PROBLEM TO INCLUDE ALL MDR RELAY MODELS WITH DATE CODES 93XX THROUGH 95XX. PREVIOUSLY ONLY MODELS WITH DATE CODES OF 94XX WERE THOUGHT AFFECTED. POTTER & BRUMFIELD HAS COMMITTED TO COMPLETE ITS ROOT CAUSE ANALYSIS ON THE FAILURE MECHANISM, ISSUE A WRITTEN REPORT WITH DETAILED DATE CODE IDENTIFICATION, AND RECOMMENDED CORRECTIVE ACTIONS BY DECEMBER 1, 1997. ABB-CE WILL INFORM ITS CUSTOMERS OF THIS CHANGE.
THE HEADQUARTERS OPERATIONS OFFICER INFORMED R4DO (JOE TAPIA) AND NRR (VERN HODGE) .}}