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.
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