ML12123A089
| ML12123A089 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry, Harris, Watts Bar, Sequoyah, Brunswick, Crystal River, Robinson, Comanche Peak, Bellefonte  |
| Issue date: | 04/27/2012 |
| From: | David Brown ABB |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML12123A089 (5) | |
Text
0412712012 U.S. Nuclear Regulatory Commission Operations Center Event Report Page I Part 21 (PAR)
Event#
47818 Rep Org: ABB INC Notification Date I Time: 04/09/2012 17:06 (EDT)
Supplier: ABB INC Event Date / Time: 04/09/2012 (EDT)
Last Modification: 04/27/2012 Region:
1 Docket #:
City: FLORENCE Agreement State:
Yes County:
License #:
State: SC NRC Notified by: DAVID BROWN Notifications:
BLAKE WELLING R1DO HQ Ops Officer: CHARLES TEAL GERALD MCCOY R2DO Emergency Class: NON EMERGENCY DAVID HILLS R3DO 10 CFR Section:
VINCENT GADDY R4DO 21.21 (d)(3)(i)
DEFECTS AND NONCOMPLIANCE PART 21 GROUP EMAIL PART 21 REPORT - HK CIRCUIT BREAKER STUDS FAILED TO MEET SPECIFICATION "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."
- *
- UPDATE FROM DAVID BROWN VIA FAX AT 1309 EDT on 4/27/12 * *
- 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 RIDO (Jackson), R2DO (Musser), R3DO (Lara) and R4DO (Proulx).
12:38:33 p.m.
04-27-2012 1 /3 98434134853 2300 Mechanicsville Road Florence, South Carolina 29501 (843) 413-4700 (843) 413-4853 Fax To:
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98434134853 12:38:39 p.m.
04-27-2012 2/3 ABS April 27, 2012 Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555-0001 FAX 301-816-5151
Subject:
Amended Report IOCFR Part 21 Notification of Deviation re. Legacy Breaker Studs This amended report is submitted to provide the list of affected utilities who may have received a suspect component and to update status of corrective actions detailed in the original notification.
I. Notifying individual: Jay Lavrinc, Vice President & General Manager, ABB (Medium Voltage Service), 2300 Mechanicsville Road, Florence, SC 29501.
- 2. Identification of the Subject component: ABB P/N 163392A00 stud and 192247A00 stud.
These studs are used in truck assemblies for large frame (7.5 and 15) HK circuit breakers and in TVA refurbishment kits. The 163392A00 and 192247A00 studs are use to hold the puffer piston pivot bracket in place.
- 3. Nature of the deviation: Two of five refurbished HK circuit breakers provided to TVA incurred damage to 163392A00 studs during the receiving inspection. TVA provided notice of this damage to ABB March 22, 2012. The damaged studs were provided to a material analysis lab (Element Material Technology) for failure analysis on April 2, 2012. On April 4, 2012 Element Material Technology provided a report of failure to ABB and ABB reviewed the same on April 4, 2012. The failure of the breaker studs appears to have been caused by hydrogen embrittlement, and therefore it is believed that there was a failure to comply with the baking portion of the specification which sets forth certain baking parameters in order to protect the studs from hydrogen embrittlement. Extent of condition testing performed internally by ABB indicated that P/N 192247A00 may also be subject to hydrogen embrittlement suspect due to being finished in conjunction with the same production run.
- 4. The function of these studs is to hold the puffer piston pivot bracket in place and allow proper air flow direction. The safety related function of the puffer assembly is the creation of an airflow through the puffer nozzle when the circuit breaker is opened. The air flow is directed between the arcing contact and the stationary contact so as to propel the arc up into the arc chute assembly. Failure to provide proper air flow could cause damage to the arcing contact assembly. The failure of a proper airflow could cause damage to the contacts due to prolonged arcing and subsequent high resistance in the contact assembly, however the breaker will still operate. ABB's recommendation is to review the suspected parts during the next planned service interval.
ABB Inc.
2300 MECHANICSVILLE ROAD MEDIUM VOLTAGE SERVICE PHONE (843) 413-4727 FLORENCE, SC 29501 USA FACSIMILE (843) 413-4853
98434134853 12:38:58 p.m.
04-27-2012 3/3 All
- 5. Corrective actions include:
- a. Notification of the potential existence of this deviation to affected customers. (Action complete)
EFH/Luminant
- PO S07133166S2 Progress Energy
- PO's 00571411, 00591629 TVA
- PO's 290492, 336501
- b. Review historical procurement and inspection records associated with the subject parts.
Objective evidence from ABB inspections indicates all characteristics confirmed including hardness and dimensions, including verification of vendor finishing and El bake times. (Action complete)
- c. Removed all 163392A00 studs (quantity of 7) from inventory. Four of 7 provided to Element Materials Technology for material analysis and destructive testing. Their report indicated satisfactory material, hardness, tensile strength and grain structure.
(Action complete)
- d. Confirmed that no inventory amount of 192247A00 was available for testing. (Action complete)
- e. Notified Surtronics of discrepancy and established process audit to be completed by ABB during next finishing production run for replacement parts 163392A00 and 192247A00. (Action complete)
Because of the large variety of usages of the affected circuit breakers, ABB (Medium Voltage Service) cannot determine if the potential for a substantial safety hazard exists at any licensee's facility if premature failure of these studs occurs. Licensees are requested to evaluate the history of circuit breaker operating cycles to determine if the circuit breaker studs should be replaced immediately, or to perform the replacement at the next convenient maintenance opportunity.
Very truly yours, VP & GM ABB M VS ABB Inc.
2300 MECHANICSVILLE ROAD MEDIUM VOLTAGE SERVICE PHONE (4) 413-4727 FLORENCE, SC 29501 USA FACSIMILE (843) 413-4853
0412712012 U.S. Nuclear Regulatory Commission Operations Center Event Report Page I Part 21 (PAR)
Event#
47818 Rep Org: ABB INC Notification Date / Time: 04/09/2012 17:06 (EDT)
Supplier: ABB INC Event Date / Time: 04/09/2012 (EDT)
Last Modification: 04/27/2012 Region:
1 Docket #:
City: FLORENCE Agreement State:
Yes County:
License #:
State:
SC NRC Notified by: DAVID BROWN Notifications: BLAKE WELLING R1DO HQ Ops Officer: CHARLES TEAL GERALD MCCOY R2DO Emergency Class: NON EMERGENCY DAVID HILLS R3DO 10 CFR Section:
VINCENT GADDY R4DO 21,21 (d)(3)(i)
DEFECTS AND NONCOMPLIANCE PART 21 GROUP EMAIL PART 21 REPORT - HK CIRCUIT BREAKER STUDS FAILED TO MEET SPECIFICATION "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."
- UPDATE FROM DAVID BROWN VIA FAX AT 1309 EDT on 4/27/12 ***
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).