ENS 49813
ENS Event | |
|---|---|
22:36 Feb 10, 2014 | |
| Title | Part 21 Report - Instruction Leaflet For Subject Relays May Be Deficient |
| Event Description | The following Part 21 Report was received via facsimile:
On December 12, 2013, ABB determined that that its Instruction Leaflet 41-682.11 (effective September 2002) for the subject relays may be deficient with regards to the external diagram connection. With the relay connected per the typical connections shown in the instruction leaflet and the relay having verified a synchronous condition for a period of time ranging from several minutes to hours, the main element contact identified as 'CVX-1' may become stuck in the closed position. Again, this situation is dependent on each customer's control power connection scheme and may be more prevalent in certain applications, such as fast bus transfer or tie breaker applications. In cases where the contact remains closed, it may result in an unwanted connection of two asynchronous systems when the command to connect them is issued, leading to equipment damage and possible bodily injury or death. We will be updating our instruction leaflet in February 2014, to reflect the addition of an interposing contact in the control circuit to prevent this condition. ABB's records indicate that 15 relays were supplied to Exelon (Clinton Nuclear Station), 4 relays were supplied to Duke Energy (Oconee Nuclear Station) and 10 relays were supplied to ABB d.o.o. (Slovenia). ABB has determined, as of the date of this notification, that it does not have the capability to perform an evaluation to determine if a defect exists, and therefore in accordance with 10 CFR 21.2l(b), is making this notification simultaneously to our customers so they may evaluate the deviation or failure to comply, in accordance with 10 CFR 21(a). |
| Where | |
|---|---|
| Abb Inc Coral Springs, Florida (NRC Region 1) | |
| Organization: | Abb Inc |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+-5 h-0.208 days <br />-0.0298 weeks <br />-0.00685 months <br />) | |
| Opened: | Dennis Batovsky 17:36 Feb 10, 2014 |
| NRC Officer: | John Shoemaker |
| Last Updated: | Feb 10, 2014 |
| 49813 - NRC Website | |
Abb Inc with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 536602018-09-10T04:00:00010 September 2018 04:00:00
[Table view]10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Defect Associated with Dry Type Transformer ENS 526772017-02-15T04:00:00015 February 2017 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Vendor Supplied Incorrect Relays for Class 1E Application ENS 498132014-02-10T22:36:00010 February 2014 22:36:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Instruction Leaflet for Subject Relays May Be Deficient ENS 495792013-11-25T05:00:00025 November 2013 05:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Primary Close Latch Failed to Meet Specification in K-Line Circuit Breakers ENS 478182012-04-09T04:00:0009 April 2012 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Hk Circuit Breaker Studs Failed to Meet Specification 2018-09-10T04:00:00 | |