ENS 51976: Difference between revisions
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StriderTol (talk | contribs) (Created page by program invented by Mark Hawes) |
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
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| event date = 06/03/2016 EDT | | event date = 06/03/2016 EDT | ||
| last update date = 06/03/2016 | | last update date = 06/03/2016 | ||
| title = Part 21 - Notification | | title = Part 21 - Notification of Deviation of K-Line Circuit Breaker Secondary Trip Latch | ||
| event text = The following was excepted from a report from ABB, Inc. via email: | | event text = The following was excepted from a report from ABB, Inc. via email: | ||
This letter provides notification of a defect associated with the secondary trip latch, P/N: 716789E00, which is used in the 167710T01 & 167710T03 secondary latch bar assembly and assembly kit, respectively. These assemblies are used in low voltage K-Line 225-800 Amp and 1600-2000 Amp circuit breakers. The reported failure was caused by the pin in the secondary trip latch that the return spring attaches to not being installed properly. The pin hit the tab on the tripper bar when the latch returned to the reset position. This caused the breaker to trip open. This failure was reported by Xcel Energy Prairie Island Nuclear Plant and it is the only reported occurrence of a failure caused by the return spring pin being out of position. The secondary trip latch has been cast by the same since 1996. No other field failures or failures in the ABB Service facilities have been reported as a result of this pin being out of position. Information is provided as specified in 10CFR21 paragraph 21.21(d)(4). | This letter provides notification of a defect associated with the secondary trip latch, P/N: 716789E00, which is used in the 167710T01 & 167710T03 secondary latch bar assembly and assembly kit, respectively. These assemblies are used in low voltage K-Line 225-800 Amp and 1600-2000 Amp circuit breakers. The reported failure was caused by the pin in the secondary trip latch that the return spring attaches to not being installed properly. The pin hit the tab on the tripper bar when the latch returned to the reset position. This caused the breaker to trip open. This failure was reported by Xcel Energy Prairie Island Nuclear Plant and it is the only reported occurrence of a failure caused by the return spring pin being out of position. The secondary trip latch has been cast by the same since 1996. No other field failures or failures in the ABB Service facilities have been reported as a result of this pin being out of position. Information is provided as specified in 10CFR21 paragraph 21.21(d)(4). | ||
Latest revision as of 20:45, 1 March 2018
| 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:+9.23 h0.385 days <br />0.0549 weeks <br />0.0126 months <br />) | |
| Opened: | David C. Brown 13:14 Jun 3, 2016 |
| NRC Officer: | Dong Park |
| Last Updated: | Jun 3, 2016 |
| 51976 - NRC Website | |