United States Nuclear Regulatory Commission - Protecting People and the Environment

LICENSEE: AUTOMATIC SWITCH CO.
 
SITE: AUTOMATIC SWITCH CO. EN NUMBER: 35436
 
DOCKET: EVENT DATE: 03-03-99
 
RX TYPE: EVENT TIME:
 
VENDORS: NOTIFY DATE: 03-03-99
 
EMERGENCY CLASS: N/A REGION: 1 STATE: NJ TIME: 15:51
 
OPS OFFICER: CHAUNCEY GOULD
 
10 CFR SECTION: CCCC UNSPECIFIED PARAGRAPH
  AUTOMATIC SWITCH CO (ASCO) REPORTED A MANUFACTURING DEFICIENCY .

CERTAIN PUMP AND AMPLIFIER ASSEMBLIES USED IN ASCO GENERAL CONTROLS HYDRAMOTOR ACTUATORS COULD HAVE A MANUFACTURING DEFICIENCY WHICH MAY AFFECT THE OPERATION OF THE ACTUATORS. ASCO WAS ALERTED TO THIS PROBLEM UPON EXAMINATION OF A HYDRAMOTOR ACTUATOR, THAT WAS RECENTLY RETURNED TO ASCO FROM NINE MILE POINT 2 AFTER IT HAD FAILED DURING THE POST INSTALLATION TESTING. THIS CONDITION MAY RESULT IN THE FAILURE OF THE ACTUATOR PISTON TO RETRACT WHEN THE HYDRAMOTOR IS POWERED, OR THE ACTUATOR PISTON RETURNING TO THE SPRING EXTENDED POSITION WHILE THE HYDRAMOTOR IS POWERED. THEY ARE CONTINUING THE INVESTIGATION AND WILL PROVIDE A COMPLETE LIST OF POTENTIALLY AFFECTED ACTUATORS, ALONG WITH THEIR PURCHASERS.


Page Last Reviewed/Updated Thursday, March 29, 2012