ENS Event | |
|---|---|
06:00 Dec 6, 2010 | |
| Title | Fail Safe Function of the N7000 Series Temperature Transmitter Does Not Operate Correctly Under Certain Conditions |
| Event Description | The functional issue is limited to N7000 transmitters where the field selectable jumper is set for downscale indication upon loss of input (open circuit, over range RTD, or short circuit). The transmitter may indicate a mid-range output upon open circuit or over range RTD input instead of going downscale (4 mA) as intended. Short circuit detection operates correctly in all cases.
This issue does not affect temperature transmitters during normal operating conditions, only the downscale input sensor failure indication function. N7000 transmitters that have been set for upscale sensor failure indication are not affected; however, this notification is applicable to all N7000 customers because the sensor failure indication is field selectable. The following sites are affected: Oconee, Calvert Cliffs, Perry, North Anna, Surry, Framatome ANP, Kewaunee, Diablo Canyon, and Hope Creek. |
| Where | |
|---|---|
| Ultra Electronics Round Rock, Texas (NRC Region 4) | |
| Organization: | Ultra Electronics |
| Reporting | |
| 10 CFR 21.21 | |
| Time - Person (Reporting Time:+27.97 h1.165 days <br />0.166 weeks <br />0.0383 months <br />) | |
| Opened: | Mark Mccray 09:58 Dec 7, 2010 |
| NRC Officer: | John Shoemaker |
| Last Updated: | Dec 7, 2010 |
| 46461 - NRC Website | |
Ultra Electronics with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation | |
WEEKMONTHYEARENS 464612010-12-06T06:00:0006 December 2010 06:00:00
[Table view]10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Fail Safe Function of the N7000 Series Temperature Transmitter Does Not Operate Correctly Under Certain Conditions 2010-12-06T06:00:00 | |