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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 43287 | 6 April 2007 05:00:00 | 10 CFR 21.21 | Certain Model 1152 Pressure Transmitters May Leak Above 2000 Psi Process Pressure | Model 1152 pressure transmitters shipped to facilities between June 12, 2006 and December 20, 2006 may exhibit leakage from a threaded connection interface between the flange and the vent/drain valve seat if subjected to a process pressure greater than 2000 psi. Consequently, performance to published hydrostatic test specifications, or sealing at the maximum working pressures above 2000 psi cannot be assured. The following potentially affected utilities were identified: Ameren UE, Alabama Power Co., Detroit Edison Co., Dominion, Entergy, Exelon Generation Co., First Energy Corp., FPL Duane Arnold LLC, Georgia Power Co., Nuclear Management Co., Omaha Public Power District, Pacific Gas and Electric, Pennsylvania Power and Light Co., Progress Energy Florida Inc., South Carolina Electric and Gas, and Tennessee Valley Authority. | ||
| ENS 43033 | 18 September 2006 06:00:00 | 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation | Potentially Defective Pressure Transmitters Shipped to Diablo Canyon | Notification under 10 CFR Part 21 for Model 1154 Series H Pressure Transmitters pursuant to 10 CFR Part 21, section 21.21(a), Rosemount Nuclear Instruments, Inc. (RNII) is writing to inform you that: (a) two Model 1154 Series H pressure transmitters shipped to Pacific Gas & Electric on September 18, 2006, may not conform to RNII's published specification's under accident conditions. 1.0 Name and address of the Individual providing the information: Mr. Jeffrey W. Schmitt, Vice President & General Manager Rosemount Nuclear Instruments, Inc. 8200 Market Blvd Chanhassen, MN 55317 2.0 Identification of Items supplied: Two Model 1154 Series H pressure transmitters are affected, as shown below: Purchase Order - 130124, Sales Order 1732406, Model Number - 1154DH5RC, Serial Number(s) - 0533268, 0533275 Ship date - 18SEP06, Site - Diablo Canyon 3.0 Identification of firms supplying the item: Rosemount Nuclear Instruments, Inc. 8200 Market Blvd Chanhassen, MN 55317 4.0 Nature of the failure and potential safety hazard: RNII Model 1154 and Model 1154 Series H transmitters are similar in construction except that the Model 1154 Series H transmitters have a metal shroud, filled with an insulating material, surrounding the sensor module. This feature assures that the Model 1154 Series H transmitter can perform to specifications under certain accident conditions. When an order for a pressure transmitter is released to production, a travel card is generated by RNII's business operating system. In the production process a specific list of manufacturing and inspection procedures is joined to the travel card based on the transmitter model number pre-printed on the travel card. These procedures are completed in the order listed to produce the specified pressure transmitter. For the two transmitters in question, a list of procedures pertaining to the Model 1154 was attached to the travel card, rather than the procedures for the Model 1154 Series H transmitter. This error was not detected during the production process, and, as a result, the transmitters were assembled and inspected as Model 1154 transmitters. 5.0 The corrective action which is taken, the name of the individual or organization responsible for that action, and the length of time taken to complete that action: (a) As a precautionary measure, RNII held shipments of all Model 1154 Series H transmitters while production records were reviewed for discrepancies. No additional suspect transmitters were identified. (b) All RNII transmitter travel cards for the prior three years of production were examined for similar discrepancies. No additional suspect transmitters were identified. (c) RNII's field returns history was reviewed for similar nonconformances. None were found. (d) An internal corrective action request was initiated. Corrective actions have been implemented to eliminate the potential for attaching the incorrect list of production procedures. (Completed: Dec 4, 2006) 6.0 Any advice related to the potential failure of the item: The end user is advised to determine the impact of this defect upon its plant's operation and safety, and take action as deemed necessary. RNII recommends that the affected transmitters be returned to RNII for rework. (Arrangements have been made with PG&E to return the affected transmitters.) |