United States Nuclear Regulatory Commission - Protecting People and the Environment


LICENSEE: UNITED STATES ENRICHMENT CORPORATIO

SITE: PADUCAH GASEOUS DIFFUSION PLAN        EN NUMBER:31954

DOCKET: 0707001                          EVENT DATE: 03-14-97

RX TYPE:                                 EVENT TIME: 00:00

VENDORS:                                NOTIFY DATE: 03-14-97

EMERGENCY CLASS: N/A  REGION: 3 STATE: KY      TIME: 13:30

OPS OFFICER: STEVE SANDIN             

10 CFR SECTION: CDEG  21.21(c)(3)(i)      DEFECTS/NONCOMPLIANCE



10 CFR PART 21 NOTIFICATION REGARDING STRESS CORROSION CRACKING  

OF CYLINDER VALVE PACKING NUTS                                   

                                                                 

IT HAS BEEN DETERMINED THAT STRESS CORROSION CRACKING OF THE     

1-INCH CYLINDER VALVE PACKING NUTS USED IN VARIOUS STAGES OF THE 

ENRICHMENT PROCESS HAS, IN ONE CASE, RESULTED IN A REPORTABLE    

RELEASE OF UF6.  THIS PROBLEM HAS ONLY BEEN OBSERVED IN THE      

636-ALLOY NUTS ON VALVES SUPPLIED BY HUNT VALVE CO., INC.        

                                                                 

* * * UPDATE 1740EDT 4/11/97 FROM MARK LOMBARD TO S. SANDIN * * *

                                                                 

THE LICENSEE SUBMITTED AN UPDATE VIA FAX.  NOTIFIED R3DO(MADERA) 

AND FORWARDED TO NMSS(RAMSEY).                                   



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