ML16061A011

Nuclear Logistics, Inc. - Part 21 Contactor Making Noise, Per Turkey Point

ML16061A011
Person / Time
Site:	Turkey Point
Issue date:	02/27/2016
From:	Bolt T Nuclear Logistics
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML16061A011 (4)

Text

02/27/2016 U.S. Nuclear Reeulatorv Commission Onerations Center Event Renort Pa*

7

• • • This Event has been retracted I!![

• • • This Event has been retracted I!!!

Part 21 (PAR)

Event #

51743 Rep Org: NUCLEAR LOGISTICS INC Notification Date/ITime: 02/18/2016 18:29 (EST)

Supplier: NUCLEAR LOGISTICS INC Event Date I Time: 02/18/2016 (CST)

Last Modification: 02/26/2016 Region:

4 Docket #:

City:

FORT WORTH Agreement State:

Yes County:

License #:

State: TX NRC Notified by: TRACY BOLT Notifications:

GLENN DENTEL RIDO HQ Ops Officer: STEVEN VITTO SHANE SANDAL R2DO Emergency Class: NON EMERGENCY ROBERT ORLIKOWSKI R3DO 10 CFR Section:

GREG WERNER R4DO 21.21(a)(2)

INTERIM EVAL OF DEVIATION PART 21/50.55 REACTORS EMAIL PART 21 - CONTACTOR MAKING NOISE The following was received via fax:

"Initial notification of a potential 10 CFR Part 21 condition.

"Pursuant to the rules of 10 CFR 21.21 this initial notification is being submitted to the NRC to identify a potential rePortable condition that is currently under evaluation.

"FPL [Florida Power & Light] Turkey Point has identified a contactor that was making a considerable amount of noise that was not expected. The unit was continuing to functionally operate, however the source of the noise is cause for investigation.

"The contactors are a non-standard Size 3 and Size 4 Freedom Series Starter/Contactor. These units are currently under evaluation and review by NLI [Nuclear Logistics Inc.] to determine the root cause of the identified condition to determine if the contactor contains a defect.

"To date there have been no reported failures of this item to perform the intended safety function. These components were first supplied in September 2002 to Duke Oconee with no reported issues identified. The units reported by FPL Turkey point were supplied in May and December 2011. They have been installed into other facilities including the Duke Shearon Harris plant in December 2013. Although the increased noise is undesirable, it is not presenting a significant condition adverse to quality that could create a substantial safety hazard. Preliminary testing has. confirmed that the safety related performance characteristics have not been degraded. However, due to the number of utilities which may have these components in service, this notification is being submitted to identify the condition to the industry.

02/27/2016 U.S. Nuclear Regulatory Commission Operations Center Event Report Paee 2 "NLI plans to have the completed report submitted by 3/15/2016."

• ** RETRACTION FROM TRACY BOLT TO JOHN SHOEMAKER AT 1847 EST ON 2/26/16 **

• This retraction is a brief summary from a report received from Nuclear Logistics Inc. via email:

"This retraction is being submitted to the NRC to provide additional information for the initial notification provided on 2/18/2016. After evaluating the identified condition, it has determined that there is no defect within the contactor that if left uncorrected would create a substantial safety hazard. This issue is not considered reportable per the rules of 10 CFR Part 21."

Notified RI1DO (Ferdas), R2DO (Shaeffer), R3DO (Stone), R4DO (Whitten), and Part 21/50.5 5 Reactors via email.

02/26/2016 17:45 P.0011002

/kAZZNL, 2/26/2016 NLI-QA-3503 To:

NRC Operations Center Fax: (301) 816 -5151 From: Tracy Bolt Director of Quality Assurance

Subject:

Formal Refraction of Initial Notification for potential 10CFR Part 21 condition.

This retraction is being submitted to the NRC to provide additional information for the initial notification provided on 2/18/2016. After evaluating the identified condition, it has determined that there is no defect within the contactor that iffleft uncorrected would create a substantial safety hazard.

This Issue is not considered reportable per the rules of 10CFR Part 21.

FPL Turkey Point identified that two of five contactors were making a "buzzing" noise that was not expected. In addition they indicated that based on visual inspection3 all of the coils in the five contactors exhibited cracking in the coil potting material. The units continued to functionally operate, however the source of the noise was cause for investigation. After receiving information regarding the Turkey Point contactors, Shearon Harris plant performed inspections of their coratactors and provided the results to NLL Shearon Harris plant did not experience any loud buzzing or failure to properly operate, however they did identify cracking of the contactor coil potting material.

The contactors included in this evaluation are a Size 3, Size 4 and Size 5,Freedom Series Starter/Contactor with NHI coils installed. NLI coil part numbers 05701 8-COIL-3 (for Size 3) and 057025-COIL-S for (sizes 4 and 5). The coils supplied for these units were designed for a specific safety function of being able to operate during a degraded voltage condition. Operation during the degraded voltage condition could not be achieved utilizing the standard commercial grade coil.

Note: This issue is not prevalent on the Size I and Size 2 Freedom Series contactors with the NLI coils installed.

NLI perlbrmed testing on the contactors returned from Turkey Point that had been in service for approximately 36 months to determine iffthe safety function of the contactor was impacted by the reported condition. NLI has determined that there is no defect within the contactor that if lefi uncorrected would create a substantial safety hazard. The "buzzing" noise was confirmed to be coming from the contactor after the shading coil ring fell off of the iron core. The shading coil is a brass ring that is affixed to the iron core, equipped in the original contactor from the commercial manufacturer. After extensive testing and engineering evaluation, it is concluded that when or iffthe shading coil comes loose from the iroit core, it will not affect the contactor's safety related fimction.

Page l of 2 NUCLEAR LOGISTICS INC.

www.azz~com 7'410 Pebble Drive Fort Worth, Texas 78118 500.445.4124 Phone 817.500.0484 Fax

0212512016 17:46P0000 P.0021002 This was confirmed through multiple tests at varied voltages. The loud "buzzing" noise does not affect the contactor safety related performance characteristics. The cracks in the coil potting material are attributed to the thenrial expansion of the coil windings and heat stresses during continuous duty operation. The purpose of the potting material is to retain the shape for the coil windings in the installed configuration. There was no degradation in the dielectric strength of the insulating system.

Therefore, although the coils may exhibit cracking in the potting material, the safety related performance characteristics have not been degraded.

To date, there have been no reported failures of this item to perform the intended safety ftunction.

These components were first supplied in September 2002 to Duke Oconee with no reported issues identified. The units reported by FPL Turkey point were installed: June 2012 (qty 3), October 2013 (qty 1) and April 2014 (qty 1). The units identified at Turkey point operate in a continuous duty for 18 months at a time. They have been installed into other facilities including the DUKE Shearon iarris plant in December 2013.

Although the increased noise is undesirable, it is not presenting a significant condition adverse to quality that could create a substantial safety hazard. Extensive testing has confirmed that the safety related performance characteristics have not been degraded. However, due to the number of utilities which may have these components in service, this notification is being submitted to identify the condition to the industry.

NLH will complete the evaluation report and will submit copies to the applicable utilities.

SincerlY Tracy Bolt Director of Quality Assurance Page 2 of 2

02/27/2016 U.S. Nuclear Reeulatorv Commission Onerations Center Event Renort Pa*

7

• • • This Event has been retracted I!![

• • • This Event has been retracted I!!!

Part 21 (PAR)

Event #

51743 Rep Org: NUCLEAR LOGISTICS INC Notification Date/ITime: 02/18/2016 18:29 (EST)

Supplier: NUCLEAR LOGISTICS INC Event Date I Time: 02/18/2016 (CST)

Last Modification: 02/26/2016 Region:

4 Docket #:

City:

FORT WORTH Agreement State:

Yes County:

License #:

State: TX NRC Notified by: TRACY BOLT Notifications:

GLENN DENTEL RIDO HQ Ops Officer: STEVEN VITTO SHANE SANDAL R2DO Emergency Class: NON EMERGENCY ROBERT ORLIKOWSKI R3DO 10 CFR Section:

GREG WERNER R4DO 21.21(a)(2)

INTERIM EVAL OF DEVIATION PART 21/50.55 REACTORS EMAIL PART 21 - CONTACTOR MAKING NOISE The following was received via fax:

"Initial notification of a potential 10 CFR Part 21 condition.

"Pursuant to the rules of 10 CFR 21.21 this initial notification is being submitted to the NRC to identify a potential rePortable condition that is currently under evaluation.

"FPL [Florida Power & Light] Turkey Point has identified a contactor that was making a considerable amount of noise that was not expected. The unit was continuing to functionally operate, however the source of the noise is cause for investigation.

"The contactors are a non-standard Size 3 and Size 4 Freedom Series Starter/Contactor. These units are currently under evaluation and review by NLI [Nuclear Logistics Inc.] to determine the root cause of the identified condition to determine if the contactor contains a defect.

"To date there have been no reported failures of this item to perform the intended safety function. These components were first supplied in September 2002 to Duke Oconee with no reported issues identified. The units reported by FPL Turkey point were supplied in May and December 2011. They have been installed into other facilities including the Duke Shearon Harris plant in December 2013. Although the increased noise is undesirable, it is not presenting a significant condition adverse to quality that could create a substantial safety hazard. Preliminary testing has. confirmed that the safety related performance characteristics have not been degraded. However, due to the number of utilities which may have these components in service, this notification is being submitted to identify the condition to the industry.

02/27/2016 U.S. Nuclear Regulatory Commission Operations Center Event Report Paee 2 "NLI plans to have the completed report submitted by 3/15/2016."

• ** RETRACTION FROM TRACY BOLT TO JOHN SHOEMAKER AT 1847 EST ON 2/26/16 **

• This retraction is a brief summary from a report received from Nuclear Logistics Inc. via email:

"This retraction is being submitted to the NRC to provide additional information for the initial notification provided on 2/18/2016. After evaluating the identified condition, it has determined that there is no defect within the contactor that if left uncorrected would create a substantial safety hazard. This issue is not considered reportable per the rules of 10 CFR Part 21."

Notified RI1DO (Ferdas), R2DO (Shaeffer), R3DO (Stone), R4DO (Whitten), and Part 21/50.5 5 Reactors via email.

02/26/2016 17:45 P.0011002

/kAZZNL, 2/26/2016 NLI-QA-3503 To:

NRC Operations Center Fax: (301) 816 -5151 From: Tracy Bolt Director of Quality Assurance

Subject:

Formal Refraction of Initial Notification for potential 10CFR Part 21 condition.

This retraction is being submitted to the NRC to provide additional information for the initial notification provided on 2/18/2016. After evaluating the identified condition, it has determined that there is no defect within the contactor that iffleft uncorrected would create a substantial safety hazard.

This Issue is not considered reportable per the rules of 10CFR Part 21.

FPL Turkey Point identified that two of five contactors were making a "buzzing" noise that was not expected. In addition they indicated that based on visual inspection3 all of the coils in the five contactors exhibited cracking in the coil potting material. The units continued to functionally operate, however the source of the noise was cause for investigation. After receiving information regarding the Turkey Point contactors, Shearon Harris plant performed inspections of their coratactors and provided the results to NLL Shearon Harris plant did not experience any loud buzzing or failure to properly operate, however they did identify cracking of the contactor coil potting material.

The contactors included in this evaluation are a Size 3, Size 4 and Size 5,Freedom Series Starter/Contactor with NHI coils installed. NLI coil part numbers 05701 8-COIL-3 (for Size 3) and 057025-COIL-S for (sizes 4 and 5). The coils supplied for these units were designed for a specific safety function of being able to operate during a degraded voltage condition. Operation during the degraded voltage condition could not be achieved utilizing the standard commercial grade coil.

Note: This issue is not prevalent on the Size I and Size 2 Freedom Series contactors with the NLI coils installed.

NLI perlbrmed testing on the contactors returned from Turkey Point that had been in service for approximately 36 months to determine iffthe safety function of the contactor was impacted by the reported condition. NLI has determined that there is no defect within the contactor that if lefi uncorrected would create a substantial safety hazard. The "buzzing" noise was confirmed to be coming from the contactor after the shading coil ring fell off of the iron core. The shading coil is a brass ring that is affixed to the iron core, equipped in the original contactor from the commercial manufacturer. After extensive testing and engineering evaluation, it is concluded that when or iffthe shading coil comes loose from the iroit core, it will not affect the contactor's safety related fimction.

Page l of 2 NUCLEAR LOGISTICS INC.

www.azz~com 7'410 Pebble Drive Fort Worth, Texas 78118 500.445.4124 Phone 817.500.0484 Fax

0212512016 17:46P0000 P.0021002 This was confirmed through multiple tests at varied voltages. The loud "buzzing" noise does not affect the contactor safety related performance characteristics. The cracks in the coil potting material are attributed to the thenrial expansion of the coil windings and heat stresses during continuous duty operation. The purpose of the potting material is to retain the shape for the coil windings in the installed configuration. There was no degradation in the dielectric strength of the insulating system.

Therefore, although the coils may exhibit cracking in the potting material, the safety related performance characteristics have not been degraded.

To date, there have been no reported failures of this item to perform the intended safety ftunction.

These components were first supplied in September 2002 to Duke Oconee with no reported issues identified. The units reported by FPL Turkey point were installed: June 2012 (qty 3), October 2013 (qty 1) and April 2014 (qty 1). The units identified at Turkey point operate in a continuous duty for 18 months at a time. They have been installed into other facilities including the DUKE Shearon iarris plant in December 2013.

Although the increased noise is undesirable, it is not presenting a significant condition adverse to quality that could create a substantial safety hazard. Extensive testing has confirmed that the safety related performance characteristics have not been degraded. However, due to the number of utilities which may have these components in service, this notification is being submitted to identify the condition to the industry.

NLH will complete the evaluation report and will submit copies to the applicable utilities.

SincerlY Tracy Bolt Director of Quality Assurance Page 2 of 2