Part 21 Report - 1997-810

LICENSEE: ABB COMBUSTION ENGINEERING SITE: ABB COMBUSTION ENGINEERING EN NUMBER:33188 DOCKET: EVENT DATE: 10-30-97 RX TYPE: EVENT TIME: 00:00 VENDORS: NOTIFY DATE: 10-30-97 EMERGENCY CLASS: N/A REGION: 1 STATE: CT TIME: 09:55 OPS OFFICER: FANGIE JONES 10 CFR SECTION: CCCC 21.21 UNSPECIFIED PARAGRAPH ABB-CE 10CFR21 REPORT ON NUT AND WASHER PLATES MADE OF INCORRECT MATERIAL. ON SEPTEMBER 18, 1997 ABB-CE RECEIVED INFORMATION REGARDING INCORRECT NUT AND WASHER PLATE MATERIAL SUPPLIED TO PECO FOR USE AT PEACH BOTTOM UNIT 3. THE INCORRECT MATERIAL WAS DISCOVERED BY PECO DURING RECEIPT INSPECTION. THE AFFECTED NUT AND WASHER PLATES WERE NOT INSTALLED AND NO OTHER APPLICATIONS EXIST AS THIS WOULD HAVE BEEN THE FIRST APPLICATION. THE NUT AND WASHER PLATES WERE SUPPLIED TO ABB-CE BY US TOOL AND DIE COMPANY. THE NUT AND WASHER PLATES WERE TO BE USED IN EMERGENCY CORE COOLING SYSTEM (ECCS) SUCTION STRAINER BOLTED CONNECTIONS. THE INCORRECT MATERIAL COULD RESULT IN FAILURE TO ACHIEVE PROPER BOLT PRELOAD, POTENTIALLY RESULTING IN STRAINER MODULES SEPARATING BY MORE THAN THE DESIGN LIMIT OF 1/8 INCH DURING SOME LOADING CASES. ABB-CE IS PREPARING TRAINING CLASSES TO STRENGTHEN ITS OWN INTERNAL REVIEW PROCESSES TO PREVENT REOCCURRENCES OF THIS ERROR. ABB-CE IS PROVIDING AN INFORMATION COPY OF THE 10CFR21 REPORT TO PECO ENERGY, STONE AND WEBSTER ENGINEERING CORPORATION, AND UTILITIES OWNING AN ABB-CE DESIGNED NUCLEAR STEAM SUPPLY SYSTEM. US TOOL AND DIE COMPANY IS REVISING ITS INTERNAL PROCEDURES TO PREVENT A RECURRENCE OF THIS ERROR. THEY HAVE INITIATED A REQUIREMENT THAT ALL CONTRACT MATERIAL BE RECEIPT INSPECTED IN ACCORDANCE WITH APPROVED CUSTOMER DOCUMENTS.

Page Last Reviewed/Updated Friday, January 31, 2020