ML16162A681
| ML16162A681 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 06/06/2016 |
| From: | David Brown ABB |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 51976 | |
| Download: ML16162A681 (6) | |
Text
0610612016 U.S. Nuclear Regulatory Commission Operations Center Event Report Page I Part 21 (PAR)
Rep Org: ABB, INC.
Supplier: ABB, INC.
Region: 1 Event#
51976 Notification Date I Time: 06/03/2016 13:14 (EDT)
Event Date I Time: 06/03/2016 (EDT)
Last Modification: 06/03/2016 Docket#:
City: FLORENCE County:
Agreement State:
Yes State: SC NRC Notified by: DAVID C. BROWN HQ Ops Officer: DONG HWA PARK Emergency Class: NON EMERGENCY 10 CFR Section:
21.21 (d)(3)(i)
DEFECTS AND NONCOMPLIANCE License#:
Notifications: DAVID HILLS PART 21/50.55 REACTORS PART 21 - NOTIFICATION OF DEVIATION OF K-LINE CIRCUIT BREAKER SECONDARY TRIP LATCH The following was excepted from a report from ABB, Inc. via email:
R3DO EMAIL "This letter provides notification of a defect associated with the secondary trip latch, P/N: 716789EOO, 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).
"Notifying individual: Andrew Wall, Vice President & General Manager, ABB (Electrification Products Medium Voltage Service US), 2300 Mechanicsville Road, Florence, SC 29501 "Identification of the Subject component: ABB part numbers 716789EOO (secondary latch bar) and 167710T01 &
167710T03 (secondary latch bar assemblies). The secondary latch bar is available as an individual component and the secondary latch bar assemblies are utilized as components, as part of refurbishment kits, in K-Line operating mechanisms, in new K-Line breakers, and they may be replaced during a K-Line breaker refurbishment.
"Nature of the deviation: The pin that holds the return spring in place was not properly installed. The defect is believed to have occurred during the assembly process of the latch bar. The latch used in the Prairie Island
0610612016 U.S. Nuclear Regulatory Commission Operations Center Event Report Nuclear Plant circuit breaker was fabricated in 2013.
"Corrective actions include:
Quarantined and inspected PIN: 716789EOO and 167710T01/167710T03 assemblies in inventory. (Action complete)
Notified vendor of the issue via the ABB Supplier Corrective Action Request process. (Action complete)
Pagel Revised Critical Characteristic card for PIN: 716789EOO to incorporate measurement of the pin in question. (Action complete)
Conducted training with QA and Operations personnel for awareness (Action complete)
"Recommendations:
Because of the large potential variety of usages of the potentially affected circuit breakers, ABB (Medium Voltage Service) cannot determine if the potential for a substantial safety hazard exists at any licensee's facility if the circuit breaker fails to operate. It is recommended the Licensees inspect the in-service components at the next convenient maintenance opportunity and components in stock prior to installation. The pin should protrude 0.26 (
+/- 0.02) inches out of both sides of the section of the latch bar assembly.
If the latch is installed on a K-Line circuit breaker, the latch can be inspected from the bottom side of the mechanism without disassembly.
"Questions concerning this notification should be directed to the Quality Manager at the Medium Voltage Service Center in Florence, SC at (843) 413-4782 or Fax (843) 413-4853."
HOO Note: See EN#51975 for Part 21 received from Prairie Island Nuclear Generating Station.
06-03-16;01 :03PM;ABB June 3, 2016 Document Control Desk U. S, Nuclear Regulatory Commission Washington, DC 20555-0001 FAX 301-816-5151
- 9843413485
- 21 4
Subject:
10CFR Part 21 Notification of Deviation re. K-Line Circuit Breaker Secondary Trip Latch
- 1. This letter provides notification of a defect associated with the secondary trip latch, PIN:
716789EOO, 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 21.2l(d) (4).
- 2. Notifying individual: Andrew Wall, Vice President & General Manager, ABB (Electrification Products Medium Voltage Service US), 2300 Mechanicsville Road, Florence, SC 29501
- 3. Identification of the Subject component: ABB part numbers 716789EOO (secondary latch bar) and 167710T01 & 167710T03 (secondary latch bar assemblies). The secondary latch bar is available as an individual component and the secondary latch bar assemblies are utilized as components, as part of refurbishment kits, in K-Line operating mechanisms, in new K-Line
- breakers, and they may be replaced during a K-Line breaker refurbishment.
- 4. Nature of the deviation:
The pin that holds the return spring in place was not properly installed. The defect is believed to have occurred during the assembly process of the latch bar, The latch used in the Prairie Island Nuclear Plant circuit breaker was fabricated in 2013. Please see the photos below for an illustra~on of the correct, and incorrect, configuration of the pin installed in the secondary trip latch.
300 McCHANICSVILLE ROAD 1LORENCE, SC 29501 USA ABB Inc.
MEDIUM VOLTAGE SERVICE
?HONE (843) 413*4792 FACSIMILE (843) 413-4853
06-03-16;01 :03PM;ABB
- 9843413485
- 31 4 Alll
,....,_,, _...,... _.~.. -........... *.-~-...
- ~
Correct - pin is centered Incorrect - pin is not centered The subject breaker was returned to ABB for inspection and root cause analysis on 5/5/2016.
- 5. Corrective actions include:
- a. Quarantined and inspected PIN: 716789EOO and 167710T01/167710T03 assemblies in inventory. (Action complete)
- b. Notified vendor of the issue via the ABB Supplier Corrective Action Request process.
(Action complete)
- c. Revised Critical Characteristic card for PIN: 716789EOO to incorporate measurement of the pin in question. (Action complete)
- d. Conducted training with QA and Operations personnel for awareness (Action complete)
- 6. Recommendations:
Because of the large potential variety of usages of the potentially affected circuit breakers, ABB (Medium Voltage Service) cannot determine if the potential for a substantial safety hazard exists at any licensee's facility if the circuit breaker fails to operate. It is recommended the Licensees inspect the in-service components at the next convenient maintenance opportunity and components in stock prior to installation.
The pin should protrude 0.26 (+f-0.02) inches out of both sides of the section of the latch bar assembly. Please see the diagram below for a visual representation.
300 MECHANICSVILLE ROAD
MEDIUM VOLTAGE SERVICE PHONE (843) 413-4782 FACSIMILE (843) 413-4853
06-03-16;01 :03PM;ABB
- 9843413485
- 4/ 4 Alll If the latch is installed on a K-Line circuit breaker, the latch can be inspected from the bottom side of the mechanism without disassembly.
Questions concerning this notification should be directed to the Quality Manager at the Medium Voltage Service Center in Florence, SC at (843) 413-4782 or Fax (843) 413-4853.
Victor Romano Business Development Manager - Nuclear Service Training Manager Electrification Products Medium Voltage Service US 300 MECHANICSVILLE ROAD
MEDIUM VOLTAGE SERVICE PHONE (843) 413-4782 FACSIMILE (843) 413-4(153
06-03-16;01 :03PM;A88 2300 Mechanicsville Road Florence, South Carolina 29501 (843) 41$-4700-0ffice Phone (843) 413*4853 - Office Fax To:
NRC Operations Center Fax:
(301) 816-5151 Phon*: (301) 816-5100 Re:
1 O CFR Part 21 Notification
- 9843413485 ABB~ Inc.
From:
~te:
6/a/2016 Cl Urgent BFor Review Cl Please Cornm*nt D Please Reply D Please ft.cycle
- Comments:
ABB Florence Is Issuing a 1 O CFR Part 21 notification for a defect. I will follow this fax up with a phone call to confirm receipt and an e-mail so as to provide a color copy of the imbedded photos.
Thank you, J..9~ c. ??-----,
davld.c.brown@us.abb.com (843) 413-4782 Work (843) 496-8161 Cell
- 1 I 4