Part 21 Report - 1997-490

LICENSEE: UNITED STATES ENRICHMENT CORPORATIO SITE: PORTSMOUTH GASEOUS DIFFUSION P EN NUMBER:32534 DOCKET: 0707002 EVENT DATE: 06-24-97 RX TYPE: EVENT TIME: 00:00 VENDORS: NOTIFY DATE: 06-24-97 EMERGENCY CLASS: N/A REGION: 3 STATE: OH TIME: 10:30 OPS OFFICER: STEVE SANDIN 10 CFR SECTION: CDEG 21.21(c)(3)(i) DEFECTS/NONCOMPLIANCE PART 21 NOTIFICATION THE FOLLOWING IS THE PARTIAL TEXT OF A FACSIMILE RECEIVED: "THE DEFECT IS ASSOCIATED WITH RELEASE 21.1 OF THE STAAD-III STRUCTURAL ANALYSIS PROGRAM SUPPLIED BY RESEARCH ENGINEERS, 2270 SAVI RANCH, YORBA LINDA, CALIFORNIA, 92887-4608. THIS PROGRAM IS BEING USED TO EVALUATE THE EXISTING CRANE SUPPORT STRUCTURE AT THE X-326 ERP WITHDRAWAL STATION AS PART OF AN ONGOING PROJECT TO REPLACE THE EXISTING LIQUID UF6 HANDLING CRANE AT THIS LOCATION. AN ERROR WAS IDENTIFIED IN RELEASE 21.1 OF THE STAAD-III PROGRAM WHICH YIELDED NON-CONSERVATIVE RESULTS. IF THE RESULTS PROVIDED BY RELEASE 21.1 OF THE PROGRAM HAD BEEN USED AS INPUT FOR THE DESIGN OF THE CRANE SUPPORT STRUCTURE, THE MARGIN OF SAFETY COULD HAVE BEEN REDUCED AND THE POTENTIAL TO DROP A CYLINDER CONTAINING LIQUID UF6 COULD HAVE INCREASED, THEREBY CREATING A SUBSTANTIAL SAFETY HAZARD. THE PADUCAH GASEOUS DIFFUSION PLANT HAS BEEN APPRISED OF THIS SITUATION."

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