United States Nuclear Regulatory Commission - Protecting People and the Environment


ACCESSION #: 9808070214







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                                        Fax  (281) 348-1293

Westronics                         E-Mail - Westron @ Westronics.com

                                   _2_Pages counting this cover page



2200 North Park Drive, Suite 100 Kingwood, TX 77339-3804



THIS IS A 10CFR PART 21 NOTIFICATION

                    Contacts: Robert T.  Agee

                              Quality Assurance Manager



                              Larry Zett

                              Service Manager



August 5, 1998



US Nuclear Regulatory Commission

Document Control Desk

Washington, DC 20555



Subject:  Westronics Model 1200AC and 1200BC Recorders



This letter is a notification of a defect associated with Westronics 1200AC

and 1200BC recorders built under the Westronics 10CFR50 Appendix B Program.



On or about July 23, 1998, Westronics determined that three Westronics

Series 1200A Commercial Grade recorders had exhibited an anomaly whereby

the bar-graph displays went blank or froze, potentially presenting

erroneous information to the operator.  Also, the internal "beeper", which

annunciates key strokes while programming, might sound.



The Westronics Series 1200A and 1200B recorders are 1/2 Din, programmable

recorders which contain door mounted alphanumeric and bar-graph displays.



This anomaly is associated with numerous repetitive openings and closures

of the recorder door, which may cause strain related fractures in the flat-

conductor cable routed to the door-mounted display.



After the failure, the recorder continues to measure and process data

correctly, and to alarm on process signals that have exceeded normal

boundaries.  The recorder pens also indicate signal levels correctly.

However, the data which is measured and recorded may not match the data

which is displayed on the alphanumeric and bar-graph displays.



There have been no reported field failures of safety related Series 1200

(1200AC or 1200BC) recorders.



Although the anomaly has been identified in Commercial Grade recorders

only, Westronics is sending this notification to all customers who have

purchased 1200AC and/or 1200BC recorders.  The scope of this notification

includes fourteen (14) safety related recorders, of which thirteen

(13) are Westronics Series 1200AC and one (1) is a Westronics Series

1200BC.



The following is the list of safety related recorders which could

potentially contain the defect, including Serial Number, Westronics Ship

Date, Customer, Location Shipped To, and Purchase Order.



Recorder Serial#    Ship Date Customer        Shipped To   Purchase Order

123AC1019           07/10/99  Duquesne Light  Beaver Valley       D162900

123AC1020           07/10/98  Duquesne Light  Beaver Valley       D162900

123AC1021           07/10/98  Duquesne Light  Beaver Valley       D162900

123AC1022           07/10/98  Duquesne Light  Beaver Valley       D162900

123AC1023           07/10/98  Duquesne Light  Beaver Valley       D162900

123AC1024           07/10/98  Duquesne Light  Beaver Valley       D162900

121BC7042           07/01/99  Entergy         Riverbend Sta.     RB972301

121AC1025           07/07/98  Entergy         Ark. Nuclear One     973287

121AC1026           07/07/99  Entergy         Ark. Nuclear One     973287

121AC1027           07/07/98  Entergy         Ark. Nuclear One     973287

122AC1028           07/07/99  Entergy         Riverbend Sta.     RB980091

122AC1029           07/07/98  Entergy         Riverbend Sta.     RB980091

123AC1030           07/07/98  Entergy         Riverbend Sta.     RB980091

123AC1031           07/07/98  Entergy         Riverbend Sta.     RB980091



A design modification is being developed which will provide a larger bend

radius for the flat conductor cable, thereby reducing the likelihood of

cable fracture due to strain.



Westronics will provide additional details in the written report to follow.

Should you have any questions regarding the above, please contact the

undersigned.



Sincerely,



Robert T. Agee

Quality Assurance Manager



GENERAL INFORMATION or OTHER                 EVENT NUMBER: 34607



LICENSEE: WESTRONICS                         NOTIFICATION DATE: 08/05/98

    CITY: KINGWOOD            REGION: 4      NOTIFICATION TIME: 15:25 [ET]

  COUNTY:                      STATE: TX     EVENT DATE: 06/23/98

LICENSE#:                  AGREEMENT: Y      EVENT TIME: 00:00[CDT]

DOCKET:                                      LAST UPDATE DATE: 08/05/98



                                                  NOTIFICATIONS



                                             WILLIAM JOHNSON     RDO



NRC NOTIFIED BY: AGEE                        TOM MOSLAK          RDO1

HQ OPS OFFICER:  CHAUNCEY GOULD              VERN HODGE          NRR



EMERGENCY CLASS: NOT APPLICABLE

10 CFR SECTION:

CCCC 21.21          UNSPECIFIED PARAGRAPH



                               EVENT TEXT



WESTRONICS OF KINGWOOD, TX.  IS REPORTING A PART 21 DEFECT IN CERTAIN

RECORDERS THEY MANUFACTURE.



THEY HAVE DETERMINED THAT THREE WESTRONICS SERIES 1200A COMMERCIAL

GRADE

RECORDERS EXHIBITED AN ANOMALY WHEREBY THE BAR-GRAPH DISPLAYS WENT

BLANK OR

FROZE, POTENTIALLY PRESENTING ERRONEOUS INFORMATION TO THE OPERATOR.  THE

INTERNAL "BEEPER", WHICH ANNUNCIATES KEY STROKES WHILE PROGRAMING, MIGHT

SOUND.



THIS ANOMALY IS ASSOCIATED WITH NUMEROUS REPETITIVE OPENINGS AND

CLOSURES

OF THE RECORDER DOOR, WHICH MAY CAUSE STRAIN RELATED FRACTURES IN THE

FLAT-

CONDUCTOR CABLE ROUTED TO THE DOOR-MOUNTED DISPLAY.  AFTER THE FAILURE,

THE

RECORDER CONTINUES TO MEASURE AND PROCESS DATA CORRECTLY, AND TO ALARM

ON

PROCESS SIGNALS THAT HAVE EXCEEDED NORMAL BOUNDARIES.  THE RECORDER PENS

ALSO INDICATE SIGNAL LEVELS CORRECTLY.  HOWEVER, THE DATA MEASURED AND

RECORDED MAY NOT MATCH THE DATA WHICH IS DISPLAYED ON THE ALPHANUMERIC

AND

BAR-GRAPH DISPLAY.



THERE HAVE BEEN NO REPORTED FIELD FAILURES OF THE SAFETY RELATED SERIES

1200(1200AC AND 1200BC) RECORDERS, HOWEVER, THE MANUFACTURER IS NOTIFYING

CUSTOMERS WHO HAVE PURCHASED THESE RECORDERS.



THE 1200AC AND 1200BC RECORDERS HAVE BEEN SHIPPED TO THE FOLLOWING

NUCLEAR

FACILITIES: BEAVER VALLEY, RIVER BEND STATION AND ARKANSAS NUCLEAR ONE.



*** END OF DOCUMENT ***



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