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Information Notice No. 91-01: Supplier of Misrepresented Resistors
UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF NUCLEAR REACTOR REGULATION WASHINGTON, D.C. 20555 January 4, 1991 Information Notice No. 91-01: SUPPLIER OF MISREPRESENTED RESISTORS Addressees: All holders of operating licenses or construction permits for nuclear power reactors. Purpose: This information notice is intended to notify addressees of the potential for improperly marked and/or misrepresented resistors from Impala Electronics, an electrical parts distributor located in Tampa, Florida. It is expected that recipients of this notice will review the information for applicability to their facilities and consider actions, as appropriate, to avoid similar problems. However, suggestions contained in this information notice do not constitute NRC requirements; therefore, no specific action or written response is required. Discussion: On September 25, 1990, and on November 15, 1990, the Government-Industry Data Exchange Program (GIDEP) office issued Alert data sheets that discussed concerns regarding the sale by an electrical parts distributor, Impala Electronics, of improperly remarked Qualified Product List (QPL) resistors and non-QPL resistors that are misrepresented as QPL resistors. All remarked resistors obtained from or through Impala were identified in the Alert to be suspect. These resistors may be remarked with incorrect information that may include failure rate (FR) levels, tolerances, date codes, temperature coefficient of resistance (TCR), etc. In the Alert, the Defense Criminal Investigative Service recommended the following actions for the disposition of all remarked products obtained from or through this distributor: a. All remarked products in stock should be returned to the original manufacturer for replacement or credit, or b. All products in stock should be screened to verify that the TCR and tolerance are correct as marked, or that the parts are usable as is. Because there are no known effective screens to verify the correctness of marked date code or FR level, all parts used, or to be used in applications in which proper date code or FR level are critical should be removed and returned to the manufacturer. 9012270289 . IN 91-01 January 4, 1991 Page 2 of 2 The Defense Criminal Investigative Service has informed the NRC that Impala Electronics, known for its responsiveness to requests for quick delivery of resistors, was suspended from government contracting in December 1989, closed its doors for business as of January 1990, and was indicted in August 1990. This information notice requires no specific action or written response. If you have any questions about the information in this notice, please contact the technical contact listed below or the appropriate NRR project manager. Charles E. Rossi, Director Division of Operational Events Assessment Office of Nuclear Reactor Regulation Technical Contact: Walter P. Haass, NRR (301) 492-3219 Attachment: List of Recently Issued NRC Information Notices .
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