Home > NRC Library > Document Collections > Generic Communications > Information Notices > 1983 > IN 83-79
Information Notice No. 83-79: Apparently Improper Use of Commercial Grade Components in Safety-Related Systems
SSINS No.: 6835 IN 83-79 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D. C., 20555 November 23, 1983 Information Notice No. 83-79: APPARENTLY IMPROPER USE OF COMMERCIAL GRADE COMPONENTS IN SAFETY-RELATED SYSTEMS Addressees: All nuclear power reactor facilities holding an operating license (OL) or construction permit (CP). Purpose: This information notice is provided as a notification of the apparently improper use of commercial grade components in safety-related systems. The events described below involve commercial grade valves. However, the area of concern is not limited to valves, but rather, relates to the use of any commercial grade component in any safety-related system. No specific action is required in response to this information notice, but it is expected that recipients will review the information presented for applicability to their facilities. Description of Circumstances: On October 8, 1982, the Indiana and Michigan Electric Company reported (LER 82-080) that a heat exchanger outlet valve at D.C. Cook Unit 2 had been removed from service because it was "leaking by." Inspection revealed that the valve was leaking because the elastomer seat had pulled loose from the valve body. A representative of the valve manufacturer (Henry Pratt Company) determined that the elastomer seat had not been properly bonded to the valve body at the time of manufacture. A parallel licensee event report for D.C. Cook Unit 1 (LER 82-094) was submitted on November 5, 1982. The NRC Vendor Programs Branch (Report No. 99900056/83-01) inspected Pratt facilities and it determined that: (1) the probable cause of the lack of bonding was a failure to sand blast the valves before adding the primer, bonding material, and rubber; and (2) neither the purchase order nor the specification for the valves required the valves to be fabricated under an approved nuclear quality assurance program--i.e., they were manufactured as commercial grade valves. As a result, the omitted manufacturing process was not detected and the valves were not given the proper inspection for bond quality required for valves manufactured to nuclear requirements. 8311010019 . IN 83-79 November 23, 1983 Page 2 of 2 commercial grade components should not be used in safety-related systems unless they are evaluated by engineering and quality assurance personnel to determine if additional quality assurance requirements are necessary, and that they are properly qualified for their intended use. No written response to this notice is required. If you have any questions regarding this matter, please contact the Regional Administrator of the appropriate NRC Regional Office, or this office. Edward L. Jordan Director Division of Emergency Preparedness and Engineering Response Office of Inspection and Enforcement Technical Contact: R. J. Kiessel, IE (301) 492-8119 Attachment: List of Recently Issued IE Information Notices .
Page Last Reviewed/Updated Tuesday, November 12, 2013