ENS 51293
ENS Event | |
|---|---|
04:00 Aug 6, 2015 | |
| Title | Part 21 Report - Notification of Deviation Regarding Hk Circuit Breaker Pivot Pin |
| Event Description | The following summary was excerpted from a facsimile received from ABB:
This letter provides notification of a failure to comply with specifications associated with a pivot pin, part number 193610B00, used in HK circuit breakers. This pin is used as the pivot point for the arcing contacts. Information is provided as specified in 10CFR21 paragraph 21.21(d)(4). Notifying individual: Jay Lavrinc, Vice President & General Manager, ABB (Medium Voltage Service), 2300 Mechanicsville Road, Florence, SC 29501, phone number: (843) 413-4727 Identification of the Subject component: ABB part number 193610B00 pivot pin. This pivot in is used on new legacy HK circuit breakers and during HK breaker refurbishments. The pivot pin is also available as a component item, as part of HK breaker refurbishment kits, and as part of upper terminal contact assemblies. Nature of the deviation: During a breaker refurbishment at the ABB Florence facility, it was noted that a pivot pin cracked at the threads during installation. The peening operation performed on the threaded end of the pivot pin caused cracking due to brittle failure. Laboratory testing revealed that this particular pivot pin was made from an incorrect material. This pivot pin was purchased in April of 2015 and parts from this batch were used between 14 April and 28 May of 2015. There have been no field failures reported at this time. Corrective actions include: a. Removed all remaining pivot pins from stock. (Action complete) b. Contact primary vendor to investigate cause and correct on future orders. (Action Complete) c. Added material verification to our Critical Characteristic cards for future orders. (Action Complete) d. Upgrade of ABB's spectrometer to analyze this silicon bronze material on all future shipments. (Action Complete) e. Obtained and tested, via qualified laboratory, a batch of pivot pins to supply to customers. (Action Complete) f. Notification of the potential existence of this deviation to affected customers (Action to be completed the week of 10 August 2015) Affected Customers: Dominion (Surry Power Station); DTE Energy (Enrico Fermi Power Plant 2); Exelon Corporation (Limerick Generating Station); TVA (Sequoyah Nuclear Plant) Recommendations: If the part was installed in a breaker or assembly and the threaded end did not show signs of failure or fracture at installation, it is not considered to be part of the suspect population. ABB recommends that these pivot pins be visually inspected at the next convenient maintenance cycle. If the pivot pin is in their inventory as a component item or in a kit and was shipped in the time interval of the suspect material, it should be returned to ABB for replacement. |
| Where | |
|---|---|
| Abb Inc. (Medium Voltage Service) Florence, South Carolina (NRC Region 1) | |
| Organization: | Abb Inc. (Medium Voltage Service) |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+10.38 h0.433 days <br />0.0618 weeks <br />0.0142 months <br />) | |
| Opened: | David Brown 14:23 Aug 6, 2015 |
| NRC Officer: | Jeff Rotton |
| Last Updated: | Aug 6, 2015 |
| 51293 - NRC Website | |
Abb Inc. (Medium Voltage Service) with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 512932015-08-06T04:00:0006 August 2015 04:00:00
[Table view]10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Report - Notification of Deviation Regarding Hk Circuit Breaker Pivot Pin 2015-08-06T04:00:00 | |