ENS 53263
ENS Event | |
|---|---|
05:00 Mar 8, 2018 | |
| Title | Part 21 Notification - Defect Regarding Certain Pressure Transmitters and Amplifier Circuit Card Assemblies |
| Event Description | The following notification is an excerpt from the received report:
Pursuant to 10 CFR Part 21, section 21.21(b), Rosemount Nuclear Instruments, Inc. (RNII) is writing to inform you that a total of eleven (11) Model 1154 and 1154 Series H output range code 4 pressure transmitters whose model code includes special option suffix N0026 or N0087 and five (5) 01154-0153-0002 Amplifier Circuit Card Assemblies may not calibrate at all the published values. Name and address of the individual providing the information: Mr. Gerard Hanson Vice President & General Manager Rosemount Nuclear Instruments, Inc. 8200 Market Blvd Chanhassen, MN 55317 Nature of the failure and potential safety hazard: During evaluation of two returned 01154-0153-0002 Amplifier Circuit Card Assemblies (CCAs), it was observed that a single resistor (R316) on each affected Amplifier CCA had an incorrect resistance value. The N0026 and N0087 special options enable a standard upper range limit (URL) of a transmitter with output range code 4 to be increased from 150 inches water to 210 inches water, in combination with a minimum span of 75 inches water. This R316 resistor allows the transmitter to achieve performance specifications, calibration ranges, and spans as indicated by the special option drawing. In the sub-assembly process, the R316 resistor on a standard Amplifier CCA is replaced to create a new Amplifier CCA part number (01154-0153-0002). The R316 resistor enables the standard lower range limit (LRL) of a transmitter with output range code 4 to be decreased from -150 inches water to -210 inches water (negative pressure values imply pressure applied to the low-pressure side of the transmitter), in combination with a minimum span of 75 inches water. This R316 resistor allows the transmitter to achieve performance specifications, calibration ranges, and spans as indicated by the special option drawing. The new resistor's material traceability information is recorded on the traveler. In final assembly, each transmitter with special option suffix N0026 and N0087 is assembled using one of these 01154-0153-0002 Amplifier CCAs. It then receives a factory calibration check at 135 inches water to 210 inches water and customer specified calibrated range, to ensure conformance to the minimum span and maximum URL specifications, as defined by the special option drawing. Appropriate manufacturing paperwork is used to document and record each Amplifier CCA serial number, as well as each final assembly transmitter. To meet site specific application requirements, transmitters may be field recalibrated to different upper and lower range values and/or spans. Model 1154 and 1154 Series H transmitters with special option suffix N0026 or N0087 and Amplifier CCAs whose R316 resistors were not replaced during the sub-assembly process, will have incorrect resistance values and may not calibrate to all upper and lower range values and/or spans published for the applicable special option. However, if an affected transmitter has been successfully calibrated, having the incorrect resistance value will not adversely affect transmitter performance specifications during normal operation or accident conditions. The manufacturing records for the two returned Amplifier CCAs, part number 01154-0153-0002, were carefully reviewed. The sub-assembly traveler lacked the required material traceability information, indicating that the R318 resistors were not replaced. RNII reviewed all sub-assembly travelers for part number 01154-0153-0002. The issue has been isolated to one lot which included (16) Amplifier CCAs. On March 8, 2018, RNII concluded that a substantial safety hazard may exist. The corrective action which has been taken; the name of the individual or organization responsible for that action; and the length of time taken to complete that action: (a) RNII previously discontinued manufacturing 01154-0153-0002 Amplifier CCAs, there are no Amplifier CCAs currently in production or finished goods. (b) RNII examined all manufacturing paperwork for all 01154-0153-0002 Amplifier CCAs, and other than the single lot of (16) Amplifier CCAs described above, no additional discrepancies were found. Any advice related to the potential failure of the item: The end user is advised to determine the impact of this potential non-conformance on its plant operations and safety and take action as deemed necessary. Affected 01154-0153-0002 Amplifier CCA(s) and transmitter(s) can be returned to RNII for rework. Contact RNII to facilitate the return process. If there are any questions, or you require additional Information related to this issue, please contact: Mike Dougherty (206) 665-1112, Paul Schmeling (952) 949-5359, or Brian VanderWoude (952) 949-5207. Shipped as piece parts (P/N 01154-0153-0002) to Arkansas Nuclear One and Waterford. Shipped as part of transmitter (N0026 and N0087) to Palo Verde, St. Lucie, and Calvert Cliffs. |
| Where | |
|---|---|
| Rosemount Nuclear Chanhassen, Minnesota (NRC Region 3) | |
| Organization: | Rosemount Nuclear |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+174.9 h7.288 days <br />1.041 weeks <br />0.24 months <br />) | |
| Opened: | Duyen Pham 10:54 Mar 15, 2018 |
| NRC Officer: | Bethany Cecere |
| Last Updated: | Mar 15, 2018 |
| 53263 - NRC Website | |
Rosemount Nuclear with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 532632018-03-08T05:00:0008 March 2018 05:00:00
[Table view]10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Notification - Defect Regarding Certain Pressure Transmitters and Amplifier Circuit Card Assemblies ENS 493702013-09-20T05:00:00020 September 2013 05:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Issue on Rosemount Model 710Du Trip Units 2018-03-08T05:00:00 | |