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Category:Deficiency Report (per 10CFR50.55e and Part 21)
MONTHYEARML20114E3172020-04-23023 April 2020 Final 10 CFR Part 21 Report for Masoneilan Model 8005N Transducer ML20042E2522020-01-31031 January 2020 EN 54485 Target Rock Redacted Update to Part 21 Report on Defect of Modification of Valve Component and Main Disc Lift Misadjustment ML20029D1612020-01-21021 January 2020 10 CFR Part 21 Report, Notification of a Defect Modification of a Valve Component and Main Disc Lift Misadjustment ML19323C9712019-11-15015 November 2019 Interim 10 CFR 21 Report for Masoneilan Model 8005N Transducer ML19261A1942019-09-0606 September 2019 Final Report (Log # 2019-22-00) (Event# EN 54215) - Non-Destructive Examination (Liquid Penetrant) Performance of Components by an Un-Qualified Employee ML18302A2282018-10-19019 October 2018 Itt Enidine - USNRC 10CFR Part 21 Notification ML17312A8422017-11-0808 November 2017 Transmittal of Final Part 21 Report for Westinghouse 1000 Horsepower Motor ML17188A4222017-06-26026 June 2017 Itt Enidine, Inc - Part 21 - Potential Transducer Component Defect ML17165A4072017-06-0909 June 2017 Part 21 Report - Defective Motor Operated Potentiometer ML17173A1392017-06-0909 June 2017 Engine Systems, Inc. - Transmittal of 10CFR21 Reporting of Defects and Non-Compliance - Report No. 10CFR21-0117, Rev. 0 ML17124A7342017-05-0404 May 2017 Final Part 21 Report for General Electric Hitachi Model AKR-2BE- 50 Breaker ML17101A3642017-04-0707 April 2017 Part 21 - Circuit Breaker Defect Discovered During Current Injection Testing ML16344A1182016-12-0909 December 2016 Interim 10 CFR 21 Report for General Electric Hitachi Model AKR-2BE-50 Breaker ML16294A2642016-10-18018 October 2016 Part 21 Report - Defective Current to Pressure Transducers ML16209A0502016-07-13013 July 2016 Part 21 - Furmanite Nuclear Grade Leak Seal Material FSC-N-1B 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 ML14337A0942014-11-24024 November 2014 Notification of Potential Part 21 - Lack of Proper Power Supply Indication ML14329A0632014-11-19019 November 2014 Notification of Potential Part 21 Re Lack of Proper Power Supply Indication ML14261A1502014-09-17017 September 2014 Interim Report to the NRC of 10 CFR 21 Event 50285, Reported by Itt 07/18/14 Concerning M1 Diaphragms, Customer Testing ML14129A4362014-05-0808 May 2014 Interim Report -10CFR 21 Evaluation Regarding Potential Deficiencies in ASME Code Required Valve and Component Testing ML14094A4452014-04-0101 April 2014 Notification of Part 21 Report on Defective Raw Material Used to Manufacture Valve Stems ML13324A4902013-11-13013 November 2013 Engine Systems, Inc., 10CFR21 Reporting of Defects and Non-Compliance - Report No. 10CFR21-0110, Rev. 0, CR7 Diode Wiring Reversed: AVR Panel P/N D72-12200-100-PVNGS ML13339A7682013-11-13013 November 2013 Letter from Tom Homer Notification of Part 21 Report on a CR7 Diode Wiring Reversed on the Automatic Voltage Regular (AVR) Panels for Palo Verde IR 07200122/20001002013-11-13013 November 2013 Engine Systems, Inc., 10CFR21 Reporting of Defects and Non-Compliance - Report No. 10CFR21-0110, Rev. 0, CR7 Diode Wiring Reversed: AVR Panel P/N D72-12200-100-PVNGS ML13261A1512013-09-10010 September 2013 Part 21 Report - Improper Dedication of Actuator Parts ML13238A2532013-08-21021 August 2013 Notification of Potential Part 21 Report - Foxboro Power Supply Potential Failures Due to Defective the Wraps and Holders ML13165A3422013-06-12012 June 2013 60-Day Interim Report Involving an Evaluation of a Design Change to Magne-Blast Circuit Breakers ML13122A1272013-04-30030 April 2013 Notification of Potential Part 21 Re Brackets Used Proximity Switches Installed Upside Down ML13101A1232013-04-0909 April 2013 Part 21 - Defect Due to Change in Manufacturing Process Causing Relay Failure in Safety Related Systems ML13100A3572013-04-0808 April 2013 Westinghouse, Updated Notification of a Defect Pursuant to Requirements 10CFR21 ML13093A1532013-04-0202 April 2013 Part 21 Report - Foxboro Power Supply Potential Failures Due to Defective Tie Wraps and Holders ML13079A3202013-03-18018 March 2013 Notification of Potential Part 21 Interim Report Re Possible Deviation or Defect in Nuclear Qualified High Efficiency Particulate Air Filters ML12352A1232012-12-13013 December 2012 60-Day Interim Report Involving an Evaluation of a Design Change to Magne-Blast Circuit Breakers ML12348A1362012-12-13013 December 2012 Part 21 60-Day Interim Report Notification: Adequacy of Design Change in Am Magne-Blast Circuit Breakers ML12346A3002012-12-0707 December 2012 Part 21 Report - Brackets Used Proximity Switches Installed Upside Down ML12319A4732012-11-0909 November 2012 Interim Part 21 Report for Flowserve Four Inch Regulating Value ML12318A0412012-11-0808 November 2012 Part 21 Report - Commercial Grade Dedication Not Properly Applied to Butterfly Valves ML12243A1872012-08-23023 August 2012 Notification of Potential Part 21 - Stress Corrosion Cracking Causing Relay Failure in Safety Related Systems ML12094A3712012-04-0202 April 2012 Part 21 Report - Rosemount Pressure Transmitters with Nonzero Based Calibrations ML12097A3162012-03-0202 March 2012 Part 21 Report - Rosemont Pressure Tranmitters Out of Tolerance Condition ML12066A1182012-03-0202 March 2012 Part 21 Report - Rosemount Pressure Transmitters with Nonzero Based Calibrations ML12058A1412012-02-23023 February 2012 Part 21 Report - Rosemount Nuclear Instruments, Inc., Pressure Transmitter with Nonzero Based Calibrations ML11363A1882011-12-0202 December 2011 10CFR21 Reporting of Defects and Non-Compliance - Engine Systems, Inc. Report No. 10CFR21-0098, Rev. 3, Amot Thermostatic Valve Element P/N: 9760X ML11336A3692011-12-0101 December 2011 Notification of Potential Part 21 Interim Report on Thermostatic Valve Failure on Palo Verde EDG ML11193A0072011-07-0909 July 2011 Part 21 Notification of Valve Failed Leak Test Due to a Disc/Shaft Assembly Machining Issue ML11103A0162011-04-0505 April 2011 Engine Systems, Inc., 10CFR21 Reporting of Defects and Non-Compliance, Report No. 10CFR21-0098, Rev. 1 ML1109701512011-04-0101 April 2011 Interim Report on Thermostatic Valve Failure on Palo Verde EDG ML1109506582011-03-23023 March 2011 Submittal of Defect Discovered on Asea Brown Boveri Abb K600S 480 Vac Class 1E Breaker - Bell Alarm Switch Bracket Misalignment ML1105908862011-02-24024 February 2011 Notification of Potential Part 21 Report - Misaligned Bell Alarm Switch Brackets on 480 Vac Class 1E Circuit Breakers ML1030601022010-10-29029 October 2010 Notification of Potential Part 21 Transfer of Information Concerning Control Components Inc. (CCI) Drag Valves 2020-04-23
[Table view] Category:Letter
MONTHYEARML24019A2012024-01-19019 January 2024 Fourth 10-Year Interval, Second Period Owners Activity Report Number 1R24 ML24019A1362024-01-18018 January 2024 Inservice Inspection Request for Information ML24012A2452024-01-12012 January 2024 Response to Request for Additional Information to Proposed Method to Manage Environmentally Assisted Fatigue for the Pressurizer Surge Line ML24010A1532024-01-10010 January 2024 Information Request for the Cybersecurity Baseline Inspection, Notification to Perform Inspection ML23341A0062023-12-21021 December 2023 Project Manager Assignment IR 05000528/20230112023-12-18018 December 2023 License Renewal Inspection Report 05000528/2023011 ML23335A0782023-11-30030 November 2023 Independent Spent Fuel Storage Installation - Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation ML23325A1602023-11-17017 November 2023 Supplemental Submittal - Relief Request 70 Proposed Alternatives for Pressurizer Lower Shell Temperature Nozzle IR 05000528/20234032023-11-13013 November 2023 NRC Security Inspection Report 05000528 2023403, 05000529 2023403, 05000530 2023403 (Full Report) ML23311A2082023-11-0909 November 2023 Reassignment of U.S. Nuclear Regulatory Commission Branch Chief in the Division of Operating Reactor Licensing for Plant Licensing Branch IV ML23299A3052023-10-26026 October 2023 Response to Request for Additional Information Relief Request 70 Proposed Alternatives for Pressurizer Lower Shell Temperature Nozzle IR 05000528/20230032023-10-17017 October 2023 Integrated Inspection Report 05000528 2023003 and 05000529 2023003 and 05000530 2023003 ML23270B9232023-09-28028 September 2023 Notification of Age-Related Degradation Inspection (05000528/2024012, 05000529/2024012, and 05000530/2024012) and Request for Information ML23251A2332023-09-13013 September 2023 Notification of Post Approval Site Inspection for License Renewal and Request for Information Inspection (05000528/2023011) ML23241B0182023-09-13013 September 2023 Use of Honeywell Mururoa V4F1 and MTH2 Supplied Air Suits within Respiratory Protection Program IR 05000528/20243012023-09-0606 September 2023 Notification of NRC Initial Operator Licensing Examination 05000528/2024301; 05000529/2024301; 05000530/2024301 IR 05000528/20230102023-08-22022 August 2023 Biennial Problem Identification and Resolution Inspection Report 05000528/2023010, 05000529/2023010 and 05000530/2023010 IR 05000528/20230052023-08-21021 August 2023 Updated Inspection Plan for Palo Verde Nuclear Generating Station, Units 1, 2, and 3 (Report 05000528/2023005 and 05000529/2023005 and 05000530/2023005) ML23222A2762023-08-10010 August 2023 Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Transportable Storage Canister Identification Numbers AMZDFX175 and AMZDFX176 and Vertical Concrete Cask Identification Numbers AMZDNE175, and AMZDNE176 ML23199A2942023-08-0909 August 2023 Issuance of Amendment Nos. 221, 221, and 221, to Revise Technical Specifications to Adopt TSTF-107, Separate Control Rods That Are Untrippable Versus Inoperable IR 05000528/20230022023-08-0808 August 2023 Integrated Inspection Report 05000528/2023002 and 05000529/2023002 and 05000530/2023002 ML23207A2482023-07-26026 July 2023 License Renewal Pressurizer Surge Line Inspection ML23188A1872023-07-0707 July 2023 Fourth 10-Year Interval, Second Period Owners Activity Report Number 2R24 ML23166B0832023-07-0505 July 2023 Independence Spent Fuel Storage Installation - Issuance of Exemption ML23181A1602023-06-30030 June 2023 2 to Updated Final Safety Analysis Report, and Revision 3 to Operations Quality Assurance Program Description ML23180A2222023-06-29029 June 2023 Application to Revise Technical Specifications (TS) 3.5.1, Safety Injection Tanks (Sits) - Operating, TS 3.5.2, Safety Injection Tanks (Sits) - Shutdown, and TS 3.6.5, Containment Air Temperature ML23181A0772023-06-29029 June 2023 Program Review - Simulator Testing Methodology ML23157A1292023-06-0101 June 2023 Annual Report of Guarantee of Payment of Deferred Premium ML23144A3722023-05-24024 May 2023 Response to Regulatory Issue Summary (RIS) 2023-01, Preparation and Scheduling of Operator Licensing Examinations ML23143A3912023-05-23023 May 2023 Independent Spent Fuel Storage Installation - Request for Exemption from NAC-MAGNASTOR Certificate of Compliance 72-1031 - Cask Lid Batch 3 Design Requirements ML23145A2772023-05-17017 May 2023 10-PV-2023-05 Post-Exam Comments ML23132A3392023-05-12012 May 2023 Application to Revise Technical Specifications 3.3.11 to Adopt TSTF-266-A, Revision 3, Eliminate the Remote Shutdown System Table of Instrumentation and Controls IR 05000528/20230012023-05-0808 May 2023 and Independent Spent Fuel Storage Installation - Integrated Inspection Report 05000528/2023001 and 05000529/2023001 and 05000530/2023001 and 07200044/2023001 ML23128A0692023-05-0808 May 2023 Notification of Biennial Problem Dentification and Resolution Inspection and Request for Information ML23122A1822023-04-29029 April 2023 Transmittal of Technical Specification Bases Revision 76 ML23122A1912023-04-29029 April 2023 Unit 1 Core Operating Limits Report Revision 32, Unit 2 Core Operating Limits Report Revision 25, Unit 3 Core Operating Limits Report Revision 31 ML23116A2772023-04-26026 April 2023 Independent Spent Fuel Storage Installation, Annual Radioactive Effluent Release Report 2022 ML23115A4012023-04-26026 April 2023 Review of the 2022 Steam Generator Tube Inspections During Refueling Outage 23 ML23115A4982023-04-25025 April 2023 2022 Annual Environmental Operating Report IR 05000528/20230122023-04-19019 April 2023 Notification of Commercial Grade Dedication Inspection (05000528/2023012, 05000529/2023012, and 05000530/2023012) and RFI ML23108A0342023-04-18018 April 2023 NRC Initial Operator Licensing Examination Approval 05000528/2023301; 05000529/2023301; 05000530/2023301 ML23103A4642023-04-13013 April 2023 Annual Radiological Environmental Operating Report 2022 ML23103A4312023-04-13013 April 2023 Emergency Core Cooling System Performance Evaluation Models, 10 CFR 50.46(a)(3)(ii) Annual Report for 2022 IR 05000528/20224012023-04-13013 April 2023 Cyber Security Inspection Report 05000528/2022401 and 05000529/2022401 and 05000530/2022401 ML23102A3292023-04-12012 April 2023 Application for Authorized Use of Mururoa Single-Use, Supplied Air Suits, Models V4F1 and MTH2 ML23102A3242023-04-12012 April 2023 Supplement to Application to Revise Technical Specifications to Adopt TSTF-107-A, Separate Control Rods That Are Untrippable Versus Inoperable ML23089A4002023-03-30030 March 2023 Consolidated Decommissioning Funding Status Report - 2022 ML23088A4012023-03-30030 March 2023 Project Manager Assignment IR 05000528/20234022023-03-29029 March 2023 and 3 - NRC Security Inspection Report 05000528-2023402, 05000529-2023402, and 05000530-2023402, (Cover Letter Only) ML23080A3002023-03-21021 March 2023 Present Levels of Financial Protection 2024-01-19
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Text
ESI ENGINE SYSTEMS, INC.
175 Freight Road Telephone: 252/977-2720 Rocky Mount, NC 27804 Fax: 252/446-1134 April 5, 2011 U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555-0001
Subject:
10CFR21 Reporting of Defects and Non-Compliance -
Engine Systems, Inc. Report No. 10CFR21-0098, Rev. 1 Amot Thermostatic Valve Element P/N: 9760X
Dear Sir:
The enclosed report addresses a revision to reportable notification for an Amot thermostatic valve element, P/N: 9760X. The report has been revised to address the safety hazard which is created or could be created by this defect.
A copy of the report has been mailed to our affected nuclear customers.
Please sign below, acknowledging receipt of this report, and return a copy to the attention of Document Control at the address above (or, fax to number 252/446-1134) within 10 working days after receipt.
Yours very truly, ENGINE SYSTEMS, INC.
Susan Woolard Document Control Please let us know if ANY of your mailing information changes - name of recipient, name of company/facility, address, etc. Mark the changes on this acknowledgment form and send to us by mail or FAX to the number above.
RECEIVED:
93 DATE:
Quality Performance With Pride
ENGINE SYSTEMS, INC.
175 Freight Road, Rocky Mount, NC 27804 Telephone: 252/977-2720 Fax: 252/446-1134 Report No. 10CFR21-0098 Rev. 0: 12/01/09 Rev. 1: 03/30/11 10CFR21 REPORTING OF DEFECTS AND NON-COMPLIANCE COMPONENT: Amot thermostatic valve element P/N: 9760X SYSTEM: Emergency Diesel Generator - lube oil & jacket water system CONCLUSION: Reportable in accordance with 1 OCFR21 Prepared By:. Date: */3e/it
, Engineering Manager Reviewed By: Date: 3Ye-//
Quality Assurance Manager Quality Performance With Pride
Report No. 10CFR21-0098 Record of Revisions Page: 1 of 1 REVI DATE E PAGE DESCRIPTION 0 12/01/09 Initial issue.
1 03/30/11 1 Under Purpose, added the last 2 sentences to address the safety hazard which is created or could be created by this defect.
Report No. 10CFR21-0098 Revision: 1 Date: 03/30/11 Page: 1 of 4 COMPONENT:
Amot thermostatic valve element Amot P/N: 9760X PURPOSE:
This report is a follow-up to an interim report (10CFR21-0098-INT) issued by Engine Systems, Inc.
(ESI) on 10/23/09 which identified a deviation with an Amot thermostatic valve element. The interim report was issued because ESI was not able to complete the evaluation within the 60 day requirement of 1 OCFR21. The evaluation was completed on 11/30/09 and the deviation was determined be a reportable defect as by defined by 10CFR21. This defect could affect operability of the thermostatic valve within the diesel engine cooling water and/or lube oil system, resulting in elevated fluid system temperatures during engine operation. Engine performance and/or load carrying capability could be impacted with the possibility of eventual engine failure, thereby preventing the emergency diesel generator from performing its safety related function.
SUMMARY
ESI began an evaluation of a thermostatic valve element failure on August 24, 2009. Palo Verde Nuclear Plant notified ESI of the failure as a result of a failure analysis they were performing on a thermostatic valve that had been removed from the lube oil system of their 2A-EDG. The element was in service since April 2008 and Palo Verde verified operation of the element prior to installation. The Palo Verde failure analysis report, performed by Exelon Power Labs, is a proprietary document and therefore a copy is not included in this notification.
The Palo Verde failure analysis determined that one of two elements within the valve was defective. The element failure was attributed to wax leakage past the diaphragm seal on one of two power pills within the element. Evidence of mechanical binding of the piston is believed to have caused the wax leakage. If the piston was jammed, the expanding wax could have over-pressurized the diaphragm seal leading to wax leakage. The failure analysis noted the following to support piston binding:
- The piston was initially difficult to remove from its guide tube.
- A gouge was observed on the piston surface.
- The rubber plug within the power pill exhibited brass machining chip debris.
The Exelon analysis also reports that similar brass machining debris was observed on the plugs from the other three power pills to varying degrees. None of the stems of these pills displayed evidence of gouging or binding.
To date, no other similar failures with Amot thermostatic valves have been reported to ESI.
ESI has contacted the valve manufacturer (Amot) to discuss these findings. A copy of the Palo Verde failure analysis and eleven (11) element assemblies from ESI inventory were sent to Amot for evaluation. The following elements were sent to Amot for evaluation:
- Qty. 8: P/N 9760X-170* (CES P/N 2-05V-419-107)
- Qty. 3: P/N 9760X-1 60* (CES P/N 2-05V-419-109)
- Both part number elements are the same except for the temperature setting
("-170" indicates 170°F nominal and "-160" indicates 160°F nominal).
Report No. 10CFR21-0098 Revision: 1 Date: 03/30/11 Page: 2 of 4 Upon completion of their evaluation, Amot has reported the following:
" Fine shavings/powder of brass was observed in some of the element pills.
- None of the pill stems had any evidence of gouging.
- The pills used in the 9760X elements are made by converting another part number pill.
This conversion consists of removing the stem from the pill and performing some machining. Amot believes the brass debris may have entered the pill as a result of this conversion process.
" Amot has not made any changes to this conversion process in recent history and has not had reports of similar problems with these elements.
- Machining debris, while undesirable, was evident in other pills which did not exhibit any operability issues; therefore this is not believed to be the cause of the pill failure.
- The primary cause of the failure is believed to be the gouge found in the pill stem. The gouge could have occurred during the conversion process as the stem is removed and handled at that time.
" As a precaution, Amot has made changes to their conversion process for this pill. The drilling fixture was modified to eliminate the possibility of chips entering the pill during the machining operation. This change was made effective 10/22/09.
DISCUSSION:
The Amot type 9760X elements are used in the Amot type "H" thermostatic valve. These valves are used in some Cooper-Bessemer KSV diesel engine jacket water and/or lube oil systems to maintain proper system temperatures during engine operation. A very limited number of EMD diesel engines also use the type "H" valve in the jacket water system.
Each valve uses 2 thermostatic elements, Amot type 9760X (item 2 in Figure 1). The element being investigated for the Palo Verde application has a nominal temperature setting of 160°F and therefore the element part number is 9760X-160.
The 9760X element contains two power pills (Figure 2). The power pills contain a temperature sensitive wax that expands with increasing temperature and provides the motive force to lift the element off of its seat.
Report No. 10CFR21-0098 Revision: 1 Date: 03/30/11 Page: 3 of 4 FIGURE 1: AMOT THERMOSTATIC VALVE FIGURE 2: VALVE ELEMENT 9760X
Report No. 10CFR21-0098 Revision: 1 Date: 03/30/11 Page: 4 of 4 AFFECTED USERS:
A listing of users with the thermostatic valves that contain the Amot 9760X element is provided in the table below.
LISTING OF DIESEL ENGINES WITH 9760X ELEMENTS Diesel Engine Thermostatic Systems SiteSytm Mfg Model Cyl Valve Braidwood/Byron C-B KSV 20 6HAS Lube Nine Mile Point C-B KSV 16 6HAS Lube Oconee EMD 645 12 & 16 4HAS & 6HAS Water Palo Verde C-B KSV 20 6HAS Lube & Water South Texas Project C-B KSV 20 6HAS Lube & Water Susquehanna C-B KSV 20 6HAS Lube & Water Waterford C-B KSV 16 5HAS & 6HAS Lube & Water Laguna Verde - EMD 645 16 6HAS Water Mexico I I _III_
CORRECTIVE ACTION:
The element failure at Palo Verde is considered to be an isolated incident related to a gouge in the pill stem. Thus, there is no recommended corrective action for users of the Amot 9760X element.
The evaluation also indicated a weakness in Amot's manufacturing process for the element pill which introduced machining debris. While not believed to be the cause of the Palo Verde element failure, machining debris within the element pill is undesirable and increases the potential for failure in the future. Users with thermostatic valves containing Amot P/N 9760X elements should be aware of this issue so that they can monitor their systems for any indications of thermostat element problems.