ENS 47818
ENS Event | |
|---|---|
04:00 Apr 9, 2012 | |
| Title | Part 21 Report - Hk Circuit Breaker Studs Failed to Meet Specification |
| Event Description | This letter is submitted in accordance with 10 C.F.R. 21.21(d)(3)(ii) with respect to a failure to comply with the specifications associated with two studs P/N 163392A00 and 192247A00 used in medium voltage HK circuit breakers that may be subject to failure due to hydrogen embrittlement due to incorrect processing during plating. These studs were manufactured at the ABB Medium Voltage Service facility in Florence, SC from steel rod, heat treated in-house, and then sent to Surtronics for zinc plating with chromate treatment, including hydrogen embrittlement relief baking immediately following plating. A total of 51 pieces of P/N 163392A00 and 104 pieces of P/N 192247A00 were plated by Surtronics.
The vendor has notified the affected licensees, removed all remaining studs from inventory and will be auditing Surtronics established process during the next finishing production run. The licensees affected include EFH/Luminant, Progress Energy and TVA. Notified R1DO (Jackson), R2DO (Musser), R3DO (Lara) and R4DO (Proulx).
This [update] amends the previous 10CFR Part 21 Notification of 27 April 2012 that reported failed studs on 7.5 and 15 kV HK circuit breakers. This amendment is required to encompass a wider time period during which the stud (PIN: 163392A00) was sold for use in medium voltage HK circuit breakers. The previous report addressed orders between September 2011 and March 2012, but based upon a recent notification reported by TVA, our notification should have extended further in the past. Further research indicates that a shift in plating vendors in November 2010 is the likely starting point for this issue. Notified R1DO (Schroeder), R2DO (Michel), R3DO (Dickson), R4DO (Kellar), and Part 21 group via email. |
| Where | |
|---|---|
| Abb Inc Florence, South Carolina (NRC Region 1) | |
| Organization: | Abb Inc |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+13.1 h0.546 days <br />0.078 weeks <br />0.0179 months <br />) | |
| Opened: | David Brown 17:06 Apr 9, 2012 |
| NRC Officer: | Charles Teal |
| Last Updated: | Dec 16, 2016 |
| 47818 - 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 | |