United States Nuclear Regulatory Commission - Protecting People and the Environment


LICENSEE: WESTRONICS                         

SITE: WESTRONICS                            EN NUMBER:34607

DOCKET:                                  EVENT DATE: 06-23-98

RX TYPE:                                 EVENT TIME: 00:00

VENDORS:                                NOTIFY DATE: 08-05-98

EMERGENCY CLASS: N/A  REGION: 4 STATE: TX      TIME: 15:25

OPS OFFICER: CHAUNCEY GOULD           

10 CFR SECTION: CCCC  21.21               UNSPECIFIED PARAGRAPH



PART 21 REPORT - WESTRONICS OF KINGWOOD, TX REPORTED A DEFECT IN 

CERTAIN RECORDERS                                                

                                                                 

THE VENDOR HAS 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.                                        



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