United States Nuclear Regulatory Commission - Protecting People and the Environment


LICENSEE: CONVAL, INC.                       

SITE: CONVAL, INC.                          EN NUMBER:33144

DOCKET:                                  EVENT DATE: 10-24-97

RX TYPE:                                 EVENT TIME: 00:00

VENDORS:                                NOTIFY DATE: 10-24-97

EMERGENCY CLASS: N/A  REGION: 1 STATE: CT      TIME: 14:09

OPS OFFICER: STEVE SANDIN             

10 CFR SECTION: CCCC  21.21               UNSPECIFIED PARAGRAPH



10CFR21 REPORT -                                                 

                                                                 

FIVE (5) CONVAL FORGED VALVE BODIES 1"-1500# DESIGN, #5, Y-GLOBE,

STOP AND CHECK VALVE, WHICH ARE IDENTIFIED BY CONVAL'S BASIC FIG.

# 1.00-12G2J-S165F AND FIG. # 1.00-12C2-S165F SUPPLIED TO BOTH   

MAINE YANKEE ATOMIC POWER (3 VALVES) AND INDIANA & MICHIGAN POWER

(D.C. COOK 1 & 2) (2 VALVES) MAY HAVE A DEFECT RELATED TO A      

POSSIBLE CRACK WITHIN THE FORGING WALL AT THE DIE FLASH LINE.    

ONLY ONE OF THE FIVE VALVES IS KNOWN TO BE INSTALLED AT THE D.C. 

COOK SITE.  THE FORGINGS FOR THESE FIVE VALVES ARE IDENTIFIED AS 

IDEAL FORGE HEAT CODE LOT "M7", WHICH IS STAMPED ON EACH BODY    

FORGING.  CONVAL DISCOVERED THE FORGING DEFECT DURING AN         

INVESTIGATION OF A VALVE RETURNED BY A CUSTOMER.  IDEAL HAS TAKEN

CORRECTIVE ACTION TO ELIMINATE THE PROCESSING PROBLEMS.  THE     

AFFECTED NUCLEAR POWER PLANTS HAVE BEEN NOTIFIED BOTH VERBALLY   

AND IN WRITING.                                                  



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