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ACCESSION #: 9509080175 Cardinal INDUSTRIAL PRODUCTS Nuclear Division of B&G Manufacturing Company, Inc. 3873 West Oquendo o Las Vegas, Nevada 89118-3098 (702) 739-1966 o Fax (702) 739-1960 August 29, 1995 QAM-95-065 Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555 Reference: 10 CFR, Part 21 Notification To Whom It May Concern: This letter provides notification of defect to the Nuclear Regulatory Commission as required by 10 CFR Part 21, paragraph 21.21, (4). Cardinal Industrial Products (CIP) was informally contacted by Duquesne Light-Beaver Valley Power Station to discuss mechanical failures that were discovered, when they conducted supplemental testing on a Lot of 3/8 - 24 x 2 A-193 B7 HEX CAPSCREWS identified by head markings (B7, C, TS9, S4). These fasteners were supplied by CIP to Duquesne Light on purchase order D 136646. The method of performing additional testing was discussed with Duquesne Light and their subcontracted Testing Laboratory to assure that the testing was performed in accordance with ASTM A-370. It was decided that Duquesne Light would provide CIP with a sample to be tested by CIP, with a Duquesne representative present. All four (4) samples supplied by Duquesne were tested at CIP, with one (1) failure. The failure exhibited an unusually low hardness and tensile per the material specification. It should be noted that ASTM A-193 B7 material does not have a hardness requirement. CIP pulled additional product samples from stock and by conducting hardness evaluation, identified other failures. CIP sent one (1) sample that passed hardness and one (1) sample that failed hardness out for metallurgical examination by an approved testing laboratory. The results of this examination indicated that the "Good" sample had .006 "decarburization, and a core hardness of 35 HRC, while the "Bad" sample had no decarburization, and a core hardness of 95.5 HRB. The low core hardness, and more specifically, the lack of decarburization would indicate that the "Bad" sample did not receive the full heat treatment. The decarburization is formed, when alloy steel is heat treated in an air atmosphere, but in order for it to form the parts must reach the prescribed temperature. Page 2 CIP also performed hardness test, as means of an indicator, on ten (10) heat lot charges that were process before and after the suspect charge was heat treated. Duquesne Light identified test failures with product lot (3/8 x 4 A-193 B7 lot # 12133 lot code S4). CIP has identified, two (2) additional heat lot charges that exhibit the same failures in hardness as the heat lot identified by Duquesne light. Those lots are, 3/8 x 6 A-193 B7, Lot # 12134, Lot Code S5 and 5/8 - 11 x 2 1/2, A-193 B7, Lot # 11127, Lot Code TU 1). Attachment 1, to this report, identifies all of the customers who have received these suspect fasteners that could possibly create a safety hazard. The customer's have been notified of this defect and have been instructed to evaluate this condition in accordance with 10 CFR Part 21 paragraph 21.21 (a) (1) (ii) and (b) (1). CIP is in the process of conducting additional testing on all ASTM A-193, B7 inventory that was heat treated at CIP. A hold has been placed on our A-193 B7 inventory to prevent distribution until completion of our evaluation. The above defective heat lots have been nonconformanced and placed in our bonded nonconformance area. Additionally, our heat treatment facility has been closed pending further investigation. CIP will provide a complete investigation report to the NRC within sixty (60) days as required by 10 CFR Part 21. Should you have any questions, concerning this issue, please contact me at (702) 739-1966. Sincerely David Z. Hathcock Quality Assurance Manager Attachment (1) cc: NRC file. Attachment #1 "10 CFR PART 21 NOTIFICATION LIST," 6 Pages omitted. *** END OF DOCUMENT ***