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| ==Subject:== | | ==Subject:== |
| Potential Part 21 on Siemens 401-158 Safety Clip Pursuant to the requirements of lOCFR Part 21, this letter notifies the NRC of a potential Part 21 condition. The subject Safety Clip is used in medium voltage circuit breakers. The subject circuit breakers are manufactured as a commercial grade item by Siemens Industry Inc. and dedicated for use as a basic component by National Technical Systems (NTS). Affected circuit breakers are 350 MVA Siemens Type 3AF. The Safety Clip in question is made of black finish steel and retains the Close Pawl Roller. During an inspection at Wolf Creek Nuclear Operating Company, the subject Safety Clips, were found cracked, broken, missing, or degraded after 600 to 850 operations. If the Safety Clip breaks and falls off and the washers and roller pawl outside bearing and race fall off, then future circuit breaker close operations beyond the next close cycle may not be assured. National Technical Systems has provided the 350 MVA Siemens Type 3AF circuit breakers to WCNOC Wolf Creek, PSEG Nuclear LLC Salem, and Entergy ANO. NTS will contact each utility and recommend that Safety Clip part number 401-158 be inspected and replaced with Safety Clip part number 40115. This Safety Clip is a yellow zinc plated clip of different design, and no known problems exist with this Safety Clip on different type Siemens circuit breakers dedicated by NTS. NTS will perform a failure analysis to determine the nature of the 401-158 clip failure. NTS plans to complete this analysis by April 29, 2016. If you have any questions, please contact NTS' Senior Director of Nuclear Engineering and Test Services, Tom Brewington at (256) 716-4512 or email at tom.brewington@nts.com. Sincerely, .. ---*--------Megan Toomey Sr. Contracts Manager NTS Huntsville NTS Huntsville | | |
| | Potential Part 21 on Siemens 401-158 Safety Clip Pursuant to the requirements of lOCFR Part 21, this letter notifies the NRC of a potential Part 21 condition. |
| | The subject Safety Clip is used in medium voltage circuit breakers. |
| | The subject circuit breakers are manufactured as a commercial grade item by Siemens Industry Inc. and dedicated for use as a basic component by National Technical Systems (NTS). Affected circuit breakers are 350 MVA Siemens Type 3AF. The Safety Clip in question is made of black finish steel and retains the Close Pawl Roller. During an inspection at Wolf Creek Nuclear Operating |
| | : Company, the subject Safety Clips, were found cracked, broken, missing, or degraded after 600 to 850 operations. |
| | If the Safety Clip breaks and falls off and the washers and roller pawl outside bearing and race fall off, then future circuit breaker close operations beyond the next close cycle may not be assured. |
| | National Technical Systems has provided the 350 MVA Siemens Type 3AF circuit breakers to WCNOC Wolf Creek, PSEG Nuclear LLC Salem, and Entergy ANO. NTS will contact each utility and recommend that Safety Clip part number 401-158 be inspected and replaced with Safety Clip part number 40115. This Safety Clip is a yellow zinc plated clip of different design, and no known problems exist with this Safety Clip on different type Siemens circuit breakers dedicated by NTS. NTS will perform a failure analysis to determine the nature of the 401-158 clip failure. |
| | NTS plans to complete this analysis by April 29, 2016. If you have any questions, please contact NTS' Senior Director of Nuclear Engineering and Test Services, Tom Brewington at (256) 716-4512 or email at tom.brewington@nts.com. |
| | Sincerely, |
| | .. ---*--------Megan Toomey Sr. Contracts Manager NTS Huntsville NTS Huntsville |
| * 7800 Highway 20 West | | * 7800 Highway 20 West |
| * Huntsville, AL 35806 * (256) 837-4411 | | * Huntsville, AL 35806 * (256) 837-4411 |
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| |
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| ==Subject:== | | ==Subject:== |
| Potential Part 21 on Siemens 401-158 Safety Clip Pursuant to the requirements of lOCFR Part 21, this letter notifies the NRC of a potential Part 21 condition. The subject Safety Clip is used in medium voltage circuit breakers. The subject circuit breakers are manufactured as a commercial grade item by Siemens Industry Inc. and dedicated for use as a basic component by National Technical Systems (NTS). Affected circuit breakers are 350 MVA Siemens Type 3AF. The Safety Clip in question is made of black finish steel and retains the Close Pawl Roller. During an inspection at Wolf Creek Nuclear Operating Company, the subject Safety Clips, were found cracked, broken, missing, or degraded after 600 to 850 operations. If the Safety Clip breaks and falls off and the washers and roller pawl outside bearing and race fall off, then future circuit breaker close operations beyond the next close cycle may not be assured. National Technical Systems has provided the 350 MVA Siemens Type 3AF circuit breakers to WCNOC Wolf Creek, PSEG Nuclear LLC Salem, and Entergy ANO. NTS will contact each utility and recommend that Safety Clip part number 401-158 be inspected and replaced with Safety Clip part number 40115. This Safety Clip is a yellow zinc plated clip of different design, and no known problems exist with this Safety Clip on different type Siemens circuit breakers dedicated by NTS. NTS will perform a failure analysis to determine the nature of the 401-158 clip failure. NTS plans to complete this analysis by April 29, 2016. If you have any questions, please contact NTS' Senior Director of Nuclear Engineering and Test Services, Tom Brewington at (256) 716-4512 or email at tom.brewington@nts.com. Sincerely, .. ---*--------Megan Toomey Sr. Contracts Manager NTS Huntsville NTS Huntsville | | |
| | Potential Part 21 on Siemens 401-158 Safety Clip Pursuant to the requirements of lOCFR Part 21, this letter notifies the NRC of a potential Part 21 condition. |
| | The subject Safety Clip is used in medium voltage circuit breakers. |
| | The subject circuit breakers are manufactured as a commercial grade item by Siemens Industry Inc. and dedicated for use as a basic component by National Technical Systems (NTS). Affected circuit breakers are 350 MVA Siemens Type 3AF. The Safety Clip in question is made of black finish steel and retains the Close Pawl Roller. During an inspection at Wolf Creek Nuclear Operating |
| | : Company, the subject Safety Clips, were found cracked, broken, missing, or degraded after 600 to 850 operations. |
| | If the Safety Clip breaks and falls off and the washers and roller pawl outside bearing and race fall off, then future circuit breaker close operations beyond the next close cycle may not be assured. |
| | National Technical Systems has provided the 350 MVA Siemens Type 3AF circuit breakers to WCNOC Wolf Creek, PSEG Nuclear LLC Salem, and Entergy ANO. NTS will contact each utility and recommend that Safety Clip part number 401-158 be inspected and replaced with Safety Clip part number 40115. This Safety Clip is a yellow zinc plated clip of different design, and no known problems exist with this Safety Clip on different type Siemens circuit breakers dedicated by NTS. NTS will perform a failure analysis to determine the nature of the 401-158 clip failure. |
| | NTS plans to complete this analysis by April 29, 2016. If you have any questions, please contact NTS' Senior Director of Nuclear Engineering and Test Services, Tom Brewington at (256) 716-4512 or email at tom.brewington@nts.com. |
| | Sincerely, |
| | .. ---*--------Megan Toomey Sr. Contracts Manager NTS Huntsville NTS Huntsville |
| * 7800 Highway 20 West | | * 7800 Highway 20 West |
| * Huntsville, AL 35806 * (256) 837-4411 | | * Huntsville, AL 35806 * (256) 837-4411 |
| * Fax: (256) 830-2109 | | * Fax: (256) 830-2109 |
| * www.nts.com}} | | * www.nts.com}} |
|
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Category:Deficiency Report (per 10CFR50.55e and Part 21)
MONTHYEARML24255A8642024-09-0606 September 2024 Rscc Wire & Cable LLC Dba Marmon Industrial Energy & Infrastructure - Part 21 Retraction of Final Notification ML24057A3382024-02-25025 February 2024 EN 56993 - Fairbanks Morse ML24088A1142024-02-25025 February 2024 Fairbanks Morse (Fm) Part 21 Report 23-02 Re Synchro-Start Mini-Gen Signal Generator ML23066A2212023-03-0707 March 2023 Velan, Inc. - Revised Part 21 Notification Re Butterfly Valves Found to Have a Number of Fasteners Loose ML23038A0192023-02-0606 February 2023 Curtiss-Wright Part 21 Notification for Qualtech Np Supplied Eaton TMR5 Timing Relays ML23011A0622023-01-11011 January 2023 Written Part 21 Notification of a Defect Associated with Imi CCI Supplied Main Steam and Main Feedwater Isolation Valves ML22220A2362022-08-0202 August 2022 Leonardo DRS, 16-AAT907B Power Supply 10 CFR Part 21 Notification ML21260A0072021-09-0909 September 2021 Ametek Solidstate Controls, Notification of Potential Defect - 10CFR Part 21 Report Re Omron Timer Relay ML20366A0472020-11-18018 November 2020 Curtiss-Wright 10 CFR Part 21 Notification for SF-1154 Hydraulic Fluid Batch 17BLVS293 ML19346H8732019-12-12012 December 2019 Westinghouse Electric Company - Notification of the Potential Existence of Defect Pursuant to 10 CFR Part 21 ML19347A4262019-12-10010 December 2019 General Atomics - Reportable Occurrence Under 10CFR21: Reported Failure in Analog High Range Radiation Monitor (RP-2C) 0CAN101902, CFR Part 21 Notification, Ite/Gould Relay2019-10-30030 October 2019 CFR Part 21 Notification, Ite/Gould Relay ML19317D0932019-10-25025 October 2019 Engine Systems, Inc., 10CFR21 Reporting of Defects and Non-Compliance - Engine Systems, Inc. Report No. 10 CFR21-0127, Rev. 0, Emd Fuel Injectors - Seized Plunger and Bushing ML19168A0122019-05-31031 May 2019 Paragon Energy Solution LLC-10 CFR Part 21 Report of Defect GS2 Terry Turbine Introl Positioners ML19080A0592019-03-0808 March 2019 Interim Report of Potential 10CFR Part 21, Eaton A200 Series Starters/Contactors ML19002A2042018-12-21021 December 2018 to Engine Systems, Inc., Part 21 Report Re Emd Fuel and Soakback Pumps - Potentially Undertorqued Cover Bolts ML18354A7422018-12-0404 December 2018 Engine Systems, Inc., Submittal of 1OCFR21 Reporting of Defects and Non-Compliance - Report No. 1OCFR21-0123, Rev. 0 - Emo Fuel and Soakback Pumps - Potentially Undertorqued Cover Bolts ML18081A1192018-03-15015 March 2018 Rosemount Nuclear Instruments, Inc., Submittal of Notification Under 10 CFR Part 21 for Certain Model 1154 and Model 1154 Serles H Pressure Transmitters and 01154-0153-0002 Amplifier Circuit Card Assemblies ML18039A2922018-01-24024 January 2018 Velan, Inc. - Corrected Notification for 4NPS Class 150 Through 900 Swing Check Valve Disc (Part Number 8205-012) ML18024A0032018-01-16016 January 2018 Velan Inc. - Part 21 Notification for Disc (Part Number 8205-012) in 4NPS Class 150 Through 900 Swing Check Valve ML17286A0242017-10-11011 October 2017 Part 21 on Siemens 5-3AF-GER-350-1200-78 & 5-3AF-GEU-350-1200-78 Circuit Breakers ML17194A8252017-07-11011 July 2017 Part 21 Report Re Wedge Pin Failure in Anchor Darling Motor Operated Double Disc Gate Valves with Threaded Stem to Upper Wedge Connections ML17114A0702017-04-13013 April 2017 Part 21 Notification - Identified Fisher 546S Electro-Pneumatic Transducers Standard Mounting Brackets Failed Seismic Testing Standards ML17104A2882017-04-13013 April 2017 Emerson Process Management, LLC - Fisher Information Notice, (FIN) 2017-02 ML17081A4532017-03-20020 March 2017 Part 21 - Plastic Jar Dedication Sampling ML17026A4142017-01-20020 January 2017 C&D Technologies, Inc. - Part 21 - Plastic Jar Dedication Sampling ML17019A3512017-01-10010 January 2017 Submittal of 10CFR21 Reporting of Defects and Non-Compliance Rev. 0, Emo Fuel Injector ML16321A4512016-10-21021 October 2016 Part 21 Reporting of Defects and Noncompliance ML16294A2642016-10-18018 October 2016 Part 21 Report - Defective Current to Pressure Transducers ML16281A2712016-09-30030 September 2016 Part 21 - Safety Related Component Welding by an Unqualified Welder ML16281A2702016-09-22022 September 2016 Part 21 - Initial Notification of Masterpact Breaker Fail to Close ML16278A4712016-09-22022 September 2016 Notification of 10 CFR Part 21 Condition, Masterpact Breaker Fail to Close ML16243A4752016-08-26026 August 2016 Part 21 Safety Related Component Welding by an Unqualified Welder ML16243A4722016-08-25025 August 2016 Part 21 Reporting of Defects and Noncompliance ML16229A4442016-08-15015 August 2016 Potential Part 21 on Safety Clip, Siemens Part Number 401158 ML16196A0652016-07-0909 July 2016 Part 21 Report - Nonconformance on Struthers-Dunn Relay for Psge Nuclear LLC ML16203A1792016-07-0707 July 2016 Curtiss-Wright 10 CFR Part 21 Report Regarding Disposition of a Nonconformance on Struthers-Dunn Relay Part Number B225XCXP125V Supplied to PSEG Nuclear, LLC ML16188A3742016-06-30030 June 2016 Part 21 - Inadequate Swaging and Adherence of Silicone O-Ring and Silicone PAD Soft Seat Main Disc and Pilot Disc Assemblies ML16162A6792016-06-0808 June 2016 Part 21 Report - Nonconformance on Struthers-Dunn Relay for PSEG Nuclear LLC ML16139A8312016-05-13013 May 2016 Part 21 Notification - Potential Defect Applicable to Hytork XL1126 Pneumatic Actuators ML16139A8342016-05-10010 May 2016 Electroswitch - Transmittal of 10CFR Part 21 Reporting of Defects and Noncompliance Regarding Vendor Inspection of Electroswitch Corporation Docket No. 99900833 ML16126A1112016-04-29029 April 2016 National Technical Systems (Nts) Request for Extension, for Potential Part 21 on Safety Clip, Siemens Part Number 401-158 ML16125A3602016-04-26026 April 2016 Part 21 - Hydraulic Snubber Seal Material Deviation Interim Report ML16098A4452016-03-22022 March 2016 Part 21 Notification - Sense and Transfer Module Resistive Short ML16112A2102016-03-14014 March 2016 National Technical Systems - Potential Part 21 on Siemens 401-158 Safety Clip, Per Wolf Creek, Salem, and Arkansas Nuclear One ML15134A0182015-05-0707 May 2015 Part 21 Report Regarding Struthers Dunn Relays with Contact Resistance Greater than One Ohm ML15146A0222015-05-0707 May 2015 Qualtech Np - Potential 1O CFR Part 21 Notification on Struthers Dunn Relays ML15103A4852015-04-0707 April 2015 Itt Engineered Valves - 2nd Interim Report to the NRC of 10 CFR 21 Event 50285, Reported by Itt 07/18/14 Concerning M I Diaphragms, Customer Testing ML15089A4352015-03-27027 March 2015 Part-21 Notification - Sense and Transfer Module Resistive Short ML15049A4582015-02-0606 February 2015 Thermo Gamma-Metrics, LLC - Part 21 Report Regarding Shutdown Margin Monitor Environmental Qualification Noncompliance 2024-09-06
[Table view] Category:Letter
MONTHYEARIR 05000272/20244032024-09-25025 September 2024 and Salem Nuclear Generating Station, Units 1 and 2, Cybersecurity Inspection Report 05000354/2024403, 05000272/2024403, and 05000311/2024403 (Cover Letter Only) IR 05000272/20244022024-09-23023 September 2024 and Salem Nuclear Generating Station, Units 1 and 2 - Security Baseline Inspection Report 05000354/2024402, 05000272/2024402, and 05000311/2024402 (Cover Letter Only) ML24267A1082024-09-23023 September 2024 Submittal of the Reactor Vessel Material Surveillance Program Capsule Technical Report ML24199A1712024-09-17017 September 2024 Issuance of Amendment No. 241 Revise Ventilation Filter Testing Program Criteria and Administrative Correction of Absorber in Technical Specification 5.5.11 ML24260A0712024-09-12012 September 2024 License Amendment Request for a Risk-Informed Resolution to GSI-191 IR 05000482/20240102024-09-10010 September 2024 Biennial Problem Identification and Resolution Inspection Report 05000482/2024010 (Public) IR 05000368/20253012024-09-0909 September 2024 Notification of NRC Initial Operator Licensing Examination 05000368/2025301 ML24255A8642024-09-0606 September 2024 Rscc Wire & Cable LLC Dba Marmon Industrial Energy & Infrastructure - Part 21 Retraction of Final Notification IR 05000313/20240112024-09-0505 September 2024 Comprehensive Engineering Team Inspection Report 05000313/2024011 and 05000368/2024011 ML24248A0762024-09-0404 September 2024 Containment Inservice Inspection Program Third Interval, Second Period, Refueling Outage 26 Owner’S Activity Report ML24248A2492024-09-0404 September 2024 Inservice Inspection Program Fourth Interval, Third Period, Refueling Outage 26 Owner’S Activity Report ML24241A2212024-08-29029 August 2024 Notice of Enforcement Discretion for Wolf Creek Generating Station IR 05000313/20244042024-08-29029 August 2024 Cybersecurity Inspection Report 05000313/2024404 and 05000368/2024404 IR 05000272/20240052024-08-29029 August 2024 Updated Inspection Plan for Salem Nuclear Generating Station, Units 1 and 2 (Report 05000272/2024005 and 05000311/2024005) ML24240A2642024-08-27027 August 2024 Corporation - Request for Notice of Enforcement Discretion Regarding Technical Specification 3.7.5, Auxiliary Feedwater (AFW) System ML24239A3972024-08-23023 August 2024 Rssc Wire & Cable LLC Dba Marmon - Part 21 Final Notification - 57243-EN 57243 ML24198A0722024-08-21021 August 2024 Correction to Issuance of Amendment No. 333 Revision to Technical Specifications to Adopt TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b IR 05000313/20240052024-08-21021 August 2024 Updated Inspection Plan for Arkansas Nuclear One – Units 1 and 2 (Report 05000313/2024005, 05000368/2024005) ML24220A2642024-08-20020 August 2024 Entergy Operations, Inc. - Entergy Fleet Project Manager Assignment ML24227A5562024-08-14014 August 2024 Application to Revise Technical Specifications to Adopt TSTF-569-A, Revision 2, Revision of Response Time Testing Definitions IR 05000482/20240052024-08-14014 August 2024 Updated Inspection Plan for Wolf Creek Generating Station (Report 05000482/2024005) ML24185A1522024-08-13013 August 2024 Issuance of Amendment Nos. 334, 235, and 215, Respectively, to Revise TSs to Adopt TSTF-205 IR 05000313/20240022024-08-0606 August 2024 Integrated Inspection Report 05000313/2024002 and 05000368/2024002 ML24213A3352024-07-31031 July 2024 License Amendment Request to Revise Technical Specification 3.2.1, Heat Flux Hot Channel Factor (Fq(Z)) (Fq Methodology), to Implement the Methodology from WCAP-17661-P-A, Revision 1. IR 05000272/20240022024-07-30030 July 2024 Integrated Inspection Report 05000272/2024002 and 05000311/2024002 ML24208A0962024-07-25025 July 2024 57243-EN 57243 - Rssc Wire & Cable LLC, Dba Marmon - Part 21 Notification ML24206A1252024-07-24024 July 2024 Revision of Three Procedures and Two Forms That Implement the Radiological Emergency Response Plan (RERP) LR-N24-0012, Application to Revise Technical Specifications and 10 CFR 50.12 Exemption Request to Implement Optimized ZIRLO Fuel Rod Cladding2024-07-24024 July 2024 Application to Revise Technical Specifications and 10 CFR 50.12 Exemption Request to Implement Optimized ZIRLO Fuel Rod Cladding IR 05000482/20240022024-07-18018 July 2024 Integrated Inspection Report 05000482/2024002 ML24145A1772024-07-15015 July 2024 and Salem Nuclear Generating Station, Unit Nos. 1 and 2 - Issuance of Amendment Nos. 236, 349, and 331 Modify Exclusion Area Boundary ML24184C1852024-07-0202 July 2024 Mode 3 Entry with One Auxiliary Feedwater Pump Train Inoperable Due to Missed Post-Maintenance Testing IR 05000482/20244012024-07-0202 July 2024 Security Baseline Inspection Report 05000482/2024401 ML24178A3672024-06-26026 June 2024 Correction to 2023 Annual Radioactive Effluent Release Report – Report 47 ML24178A4142024-06-26026 June 2024 Revision of One Procedure and One Form That Implement the Radiological Emergency Response Plan (RERP) ML24101A1792024-06-25025 June 2024 Issuance of Amendment No. 333 Revision to Technical Specifications to Adopt TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b IR 05000272/20245012024-06-12012 June 2024 and Salem Nuclear Generating Station, Units 1 and 2 - Emergency Preparedness Biennial Exercise Inspection Report 05000354/2024501, 05000272/2024501 and 05000311/2024501 ML24162A1632024-06-11011 June 2024 Operating Corporation – Notification of Biennial Problem Identification and Resolution Inspection and Request for Information (05000482/2024010) ML24150A0562024-05-29029 May 2024 Foreign Ownership, Control or Influence (FOCI) Information – Change to Lists of Owners, Officers, Directors and Executive Personnel - Form 405F Amendment ML24099A1572024-05-29029 May 2024 Issuance of Amendment Nos. 348 and 330 Permanent Extension of Type a and Type C Containment Leak Rate Test Frequencies ML24150A0032024-05-28028 May 2024 Request for Exemptions from 10 CFR 50.82(a)(8)(i)(A) and 10 CFR 50.75(h)(1)(iv) and Proposed Amendment to the Decommissioning Trust Agreement LR-N24-0041, Stations, Revisions to Emergency Plan Document Nc EP-EP-ZZ-01102, Rev. 28, Emergency Coordinator Response2024-05-22022 May 2024 Stations, Revisions to Emergency Plan Document Nc EP-EP-ZZ-01102, Rev. 28, Emergency Coordinator Response ML24143A0632024-05-22022 May 2024 Notification of Inspection (NRC Inspection Report 05000368/2024003) and Request for Information IR 05000272/20240102024-05-16016 May 2024 Fire Protection Team Inspection Report 05000272/2024010 and 05000311/2024010 LR-N24-0038, Pressure Boundary Leakage Through a Reactor Coolant Pump Thermal Barrier Heat Exchanger2024-05-0909 May 2024 Pressure Boundary Leakage Through a Reactor Coolant Pump Thermal Barrier Heat Exchanger ML23345A1602024-05-0909 May 2024 Revision of Safety Evaluation for Amendment No. 237 Request for Deviation from Fire Protection Requirements ML24128A2472024-05-0808 May 2024 Project Manager Assignment IR 05000313/20240012024-05-0808 May 2024 Integrated Inspection Report 05000313/2024001 and 05000368/2024001 IR 05000272/20240012024-05-0707 May 2024 Integrated Inspection Report 05000272/2024001 and 05000311/2024001 LR-N24-0039, Steam Generator Tube Inspection Report - Twenty-ninth Refueling Outage2024-05-0606 May 2024 Steam Generator Tube Inspection Report - Twenty-ninth Refueling Outage LR-N24-0035, 2023 Annual Radiological Environmental Operating Report (AREOR)2024-04-30030 April 2024 2023 Annual Radiological Environmental Operating Report (AREOR) 2024-09-09
[Table view] |
Text
s March 14, 2016 Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001
Subject:
Potential Part 21 on Siemens 401-158 Safety Clip Pursuant to the requirements of lOCFR Part 21, this letter notifies the NRC of a potential Part 21 condition.
The subject Safety Clip is used in medium voltage circuit breakers.
The subject circuit breakers are manufactured as a commercial grade item by Siemens Industry Inc. and dedicated for use as a basic component by National Technical Systems (NTS). Affected circuit breakers are 350 MVA Siemens Type 3AF. The Safety Clip in question is made of black finish steel and retains the Close Pawl Roller. During an inspection at Wolf Creek Nuclear Operating
- Company, the subject Safety Clips, were found cracked, broken, missing, or degraded after 600 to 850 operations.
If the Safety Clip breaks and falls off and the washers and roller pawl outside bearing and race fall off, then future circuit breaker close operations beyond the next close cycle may not be assured.
National Technical Systems has provided the 350 MVA Siemens Type 3AF circuit breakers to WCNOC Wolf Creek, PSEG Nuclear LLC Salem, and Entergy ANO. NTS will contact each utility and recommend that Safety Clip part number 401-158 be inspected and replaced with Safety Clip part number 40115. This Safety Clip is a yellow zinc plated clip of different design, and no known problems exist with this Safety Clip on different type Siemens circuit breakers dedicated by NTS. NTS will perform a failure analysis to determine the nature of the 401-158 clip failure.
NTS plans to complete this analysis by April 29, 2016. If you have any questions, please contact NTS' Senior Director of Nuclear Engineering and Test Services, Tom Brewington at (256) 716-4512 or email at tom.brewington@nts.com.
Sincerely,
.. ---*--------Megan Toomey Sr. Contracts Manager NTS Huntsville NTS Huntsville
- Huntsville, AL 35806 * (256) 837-4411
- www.nts.com s March 14, 2016 Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001
Subject:
Potential Part 21 on Siemens 401-158 Safety Clip Pursuant to the requirements of lOCFR Part 21, this letter notifies the NRC of a potential Part 21 condition.
The subject Safety Clip is used in medium voltage circuit breakers.
The subject circuit breakers are manufactured as a commercial grade item by Siemens Industry Inc. and dedicated for use as a basic component by National Technical Systems (NTS). Affected circuit breakers are 350 MVA Siemens Type 3AF. The Safety Clip in question is made of black finish steel and retains the Close Pawl Roller. During an inspection at Wolf Creek Nuclear Operating
- Company, the subject Safety Clips, were found cracked, broken, missing, or degraded after 600 to 850 operations.
If the Safety Clip breaks and falls off and the washers and roller pawl outside bearing and race fall off, then future circuit breaker close operations beyond the next close cycle may not be assured.
National Technical Systems has provided the 350 MVA Siemens Type 3AF circuit breakers to WCNOC Wolf Creek, PSEG Nuclear LLC Salem, and Entergy ANO. NTS will contact each utility and recommend that Safety Clip part number 401-158 be inspected and replaced with Safety Clip part number 40115. This Safety Clip is a yellow zinc plated clip of different design, and no known problems exist with this Safety Clip on different type Siemens circuit breakers dedicated by NTS. NTS will perform a failure analysis to determine the nature of the 401-158 clip failure.
NTS plans to complete this analysis by April 29, 2016. If you have any questions, please contact NTS' Senior Director of Nuclear Engineering and Test Services, Tom Brewington at (256) 716-4512 or email at tom.brewington@nts.com.
Sincerely,
.. ---*--------Megan Toomey Sr. Contracts Manager NTS Huntsville NTS Huntsville
- Huntsville, AL 35806 * (256) 837-4411