ENS 47693
ENS Event | |
|---|---|
06:00 Feb 16, 2012 | |
| Title | Part 21 Report - Rosemount Pressure Transmitters with Nonzero Based Calibrations |
| Event Description | The following information was received by facsimile:
During the course of qualification testing to replace certain diodes identified for obsolescence, RNII [Rosemount Nuclear Instruments, Inc.] has determined that Model 1154 Series H range code 4-8 pressure transmitters with a significantly elevated or suppressed 4 mA point may not meet the published steam pressure/temperature accuracy specification. The out of tolerance condition observed during steam pressure/temperature qualification testing is not related to the replacement diode changes. It is an inherent performance characteristic related to large zero elevation or suppression. The steam pressure/temperature accuracy specification will be revised to account for nonzero based calibrations with a significantly elevated or suppressed 4 mA point. This revised specification supersedes the published steam pressure/temperature accuracy specification for all Model 1154 Series H pressure transmitters affected by this notification. RNII recommends that users review the application where 1154 Series H range code 4-8 pressure transmitters are used to determine if there are safety considerations related to the revised steam pressure/temperature specification. Rosemount Nuclear has provided instruments to the following list of domestic U.S. customers: Alabama Power; American Electric Power; Arizona Public Service/Pinnacle West; Bechtel Power; Constellation Energy; Dominion Nuclear Connecticut/Dominion Generation; Duke Energy; ECFS MCS; Edison Material Supply; Electro Mechanics; Entergy; Exelon Generation; Florida Power and Light; FPL Energy; Georgia Power; Northern States Power-Minnesota DBA XCEL Energy; Pacific Gas and Electric; Progress Energy Florida; Progress Energy Carolinas; PSEG Nuclear; South Carolina Electric and Gas; Southern California Edison; Southern Nuclear Operating Company; STP Nuclear Operating; Tennessee Valley Authority; TXU/Luminant; Westinghouse Electric.
The following information was received by facsimile: This revision only affects Section 4.0 of the 23 February 2012 notification letter. The pressure values listed in Section 4.0 at 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> and 56 hours6.481481e-4 days <br />0.0156 hours <br />9.259259e-5 weeks <br />2.1308e-5 months <br /> have been corrected. No other changes have been made." Notified R1DO(Caruso), R2DO(Lesser), R3DO(Dickson), R4DO(Haire) and Part 21 Group via email. |
| Where | |
|---|---|
| Rosemount Nuclear Chanhassen, Minnesota (NRC Region 3) | |
| Organization: | Rosemount Nuclear |
| Reporting | |
| 10 CFR 21.21 | |
| Time - Person (Reporting Time:+173.13 h7.214 days <br />1.031 weeks <br />0.237 months <br />) | |
| Opened: | Duyen Pham 11:08 Feb 23, 2012 |
| NRC Officer: | Vince Klco |
| Last Updated: | Apr 2, 2012 |
| 47693 - NRC Website | |
Rosemount Nuclear with 10 CFR 21.21 | |
WEEKMONTHYEARENS 476932012-02-16T06:00:00016 February 2012 06:00:00
[Table view]10 CFR 21.21 Part 21 Report - Rosemount Pressure Transmitters with Nonzero Based Calibrations ENS 477162012-02-16T06:00:00016 February 2012 06:00:00 10 CFR 21.21 Part 21 Report - Rosemont Pressure Transmitters Out of Tolerance Condition ENS 464492010-11-22T06:00:00022 November 2010 06:00:00 10 CFR 21.21 Anolmaly Discovered on Rosemount Model 1152 Differential Pressure Transmitters with Output Code "L" 10-50 Ma Electronics ENS 438262007-11-15T06:00:00015 November 2007 06:00:00 10 CFR 21.21 Part 21 - Potential Insufficient Thread Engagement for Certain Pressure Transmitters 2012-02-16T06:00:00 | |