Part 21 Rept Re Failure of Plunger on Solenoid Number 1 to Return to de-actuated Position in Timely Manner When Solenoid Was de-energized.Caused by Plunger Moving While in Energized Condition.Added 'Noise' TestML20148B018 |
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Quad Cities |
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Issue date: |
05/02/1997 |
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From: |
Hutchins T AUTOMATIC VALVE CORP. |
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To: |
Mackinnon J NRC |
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References |
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REF-PT21-97 NUDOCS 9705120050 |
Download: ML20148B018 (6) |
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Category:DEFICIENCY REPORTS (PER 10CFR50.55E & PART 21)
MONTHYEARML20217A1691999-09-22022 September 1999 Part 21 Rept Re Engine Sys,Inc Controllers,Manufactured Between Dec 1997 & May 1999,that May Have Questionable Soldering Workmanship.Caused by Inadequate Personnel Training.Sent Rept to All Nuclear Customers ML20153D0191998-09-18018 September 1998 Part 21 Rept Re Defect in Gap Conductance Analyses for co- Resident BWR Fuel.Initially Reported on 980917.Corrective Analyses Performed Demonstrating That Current Operating Limits Bounding from BOC to Cycle Exposure of 8 Gwd/Mtu ML20153C6771998-09-17017 September 1998 Part 21 Rept Re Defect Relative to MCPR Operating Limits as Impacted by Gap Conductance of co-resident BWR Fuel at Facilities.Operating Limit for LaSalle Unit 2 & Quad Cities Unit 2 Will Be Revised as Listed ML20217D0281998-04-22022 April 1998 Part 21 Rept Re Additive Constants Used in MCPR Determination for Siemens ATRIUM-9B Fuel by Core Monitoring Sys Were Found to Be non-conservative.SPC Personnel Notified All Customers w/ATRIUM-9B Lead Test Assemblies ML20217J6131997-07-14014 July 1997 Part 21 Rept Re Incomplete Defined Changes Made to Standby DG W/Emd Diesel Engines by Mfg ML20140A4761997-05-27027 May 1997 Provides Addl Info to 970429 Part 21 Rept Re Potential safety-related Problem W/Asco HV 266000-007J Scram Solenoid Pilot Valves.Corrective Actions Also Listed ML20148B0181997-05-0202 May 1997 Part 21 Rept Re Failure of Plunger on Solenoid Number 1 to Return to de-actuated Position in Timely Manner When Solenoid Was de-energized.Caused by Plunger Moving While in Energized Condition.Added 'Noise' Test ML20134D8571996-10-28028 October 1996 Part 21 Rept Re Steam Isolation Valved Failed to Close within 3-5 Seconds Required by Ts.Caused by One Plunger from Solenoid Missed Machining Operation After Vitron Insert Pressed In.Solenoid Energized ML20095K3911995-12-21021 December 1995 Final Part 21 Rept 95-015 Re Bldg of Achor Darling Valves W/ Cavitation Trim.Plant Will Perform Monthly Testing of Running Loads on a Loop Valve Until Modified ML20078S1931994-12-21021 December 1994 Final Part 21 Rept Re Nonconservative Assumptions of Turbine Bypass Vot in Plant Transient Analyses for Unit 2.GE Analyses Determined That Deviation Created Potential Substantial Safety Hazard ML20059L9861993-11-11011 November 1993 Part 21 Rept Re Deviation Wherein Fully Open Butterfly Valve Located 15 Pipe Diameters Upstream of Sensors Was Disturbing Flow Profile Enough to Cause Ultrasonic Meter to Indicate 3 to 4% Low.Customers Notified & Valve Removed ML20056D7071993-07-15015 July 1993 Part 21 Rept Re Reportable defect-75 PSIG Relief Check Valve 1 Npt,Emd 9521844,Kepner 416C-1-75 ML20072R6731991-03-27027 March 1991 Part 21 Rept Re Increased Air Leakage in Pathway Bellows Corp Bellows Assembly.Assembly Replaced by Parker-Metal Bellows Corp ML20153G0111988-05-0606 May 1988 Part 21 Rept Re Potential Defect in Bussman Buss KTK-R Fuse Blocks W/Part Numbers 2078,2079 & 2080.Purchasing Records Reviewed to Identify If Any Parts Were Actually Used or Shipped to Customers.Results Listed ML20211P7211987-02-23023 February 1987 Part 21 Rept Re Rockbestos Coaxial Cable Used in Sorrento Electronics Digital & Analog high-range Radiation Monitor. Insulation Resistance at High Temp Not High Enough for Ion Chamber & Associated Electronics to Operate Properly ML20212E5631986-12-19019 December 1986 Part 21 Rept Re Valve Problem.Houghto 620 Lubricant Attacks & Degrades Aluminum in Valves.Valves Have Been or Being Rebuilt ML20215D2371986-12-0909 December 1986 Part 21 Rept Re Environ Qualification of AMP Butt Splices in GE Drywell Penetrations.Splices Retested by Simulating Postulated LOCA & Failed Due to Excessive Leakage.Ge Contacted Re Repair of Splices ML20213F9661986-11-10010 November 1986 Part 21 Rept Re Failure of Battery inter-rack Connecting Cable Assembly Supplied by Gnb Batteries,Inc.Initially Reported on 861107.Battery Cables Replaced ML20214M3181986-09-0404 September 1986 Potential Part 21 Rept Re Contromatics Actuator W/Jackscrew/ Handwheel Emergency Override Operator.Jackscrew/Handwheel Should Be Used for Emergency Manual Operation Only.Encl Ltr Also Sent to Listed Utils/Ae Firms ML20141D8051986-04-0101 April 1986 Part 21 Rept Re Model 402 Series Level Control Used for safety-related Application Shipped W/O Torque Check. Customers Will Be Notified by 860428 & Requested to Perform Torque Check.List of Plants Using Component Encl ML20133N4691985-08-0505 August 1985 Part 21 Rept Re Raychem Wcsf Shrink Sleeving for Sensor/ Connecting Assembly of Safety Relief Valve Monitoring Sys. Testing & Retesting in Progress.Sensor Installation Utilizing Shrink Sleeving Recommended ML20117L5891985-05-14014 May 1985 Part 21 Rept Re Hatch Transfer Starters & Transfer Starter Assemblies.Evaluation of Implementation of QA Program Performed on 850429-0503.Results of Evaluation Verified Seismic Adequacy of Equipment ML20127N0621985-05-13013 May 1985 Part 21 Rept Re Incorrect Short Time Delay Band Lever Inadequately Installed in Low Voltage K-line Circuit Breaker Electromechanical Overcurrent Trip Device.Visual Insp to Determine If Correct Lever Installed Recommended ML20086U4251984-02-24024 February 1984 Followup Part 21 Rept Re Defective Mechanical Snubber Capstan Springs Supplied by Pacific Scientific.Affected Utils Listed.Purchasers Have Been Notified & Advised to Work Directly W/Pacific Scientific in Disposition ML20085E7651976-08-0505 August 1976 Final Deficiency Rept Re Incorrect Installation of Reactor Pressure Vessel (RPV) Seismic Stabilizer Plates.Initially Reported on 760513.Formal QA Program Developed & Implemented Since Pvs Stabilizer Assembly Installed 1999-09-22
[Table view] Category:TEXT-SAFETY REPORT
MONTHYEARML20217A9931999-09-30030 September 1999 NRC Regulatory Assessment & Oversight Pilot Program, Performance Indicator Data SVP-99-204, Monthly Operating Repts for Sept 1999 for Quad Cities Nuclear Power Station,Units 1 & 2.With1999-09-30030 September 1999 Monthly Operating Repts for Sept 1999 for Quad Cities Nuclear Power Station,Units 1 & 2.With ML20217A1691999-09-22022 September 1999 Part 21 Rept Re Engine Sys,Inc Controllers,Manufactured Between Dec 1997 & May 1999,that May Have Questionable Soldering Workmanship.Caused by Inadequate Personnel Training.Sent Rept to All Nuclear Customers ML20212J0501999-09-21021 September 1999 Safety Evaluation Re Licensee Implementation Program to Resolve USI A-46 at Plant,Per GL 87-02,Suppl 1 SVP-99-179, Monthly Operating Repts for Aug 1999 for Quad Cities Nuclear Power Station,Units 1 & 2.With1999-08-31031 August 1999 Monthly Operating Repts for Aug 1999 for Quad Cities Nuclear Power Station,Units 1 & 2.With ML20210L8661999-08-0202 August 1999 Safety Evaluation Accepting License 60-day Response to GL 96-05, Periodic Verification of Design-Basis Capability of Safety-Related Movs SVP-99-155, Monthly Operating Repts for July 1999 for Quad Cities Nuclear Power Station,Units 1 & 2.With1999-07-31031 July 1999 Monthly Operating Repts for July 1999 for Quad Cities Nuclear Power Station,Units 1 & 2.With SVP-99-148, Monthly Operating Repts for June 1999 for Quad Cities Nuclear Power Station,Units 1 & 2.With1999-06-30030 June 1999 Monthly Operating Repts for June 1999 for Quad Cities Nuclear Power Station,Units 1 & 2.With ML20196H8621999-06-30030 June 1999 NRC Regulatory Assessment & Oversight Pilot Program, Performance Indicator Data, June 1999 Rept ML20195K1481999-06-16016 June 1999 Safety Evaluation Authorizing Relief Request RV-23A for Duration of Current 10 Yr IST Interval on Basis That Compliance with Code Requirements Would Result in Hardship Without Compensating Increase in Level of Quality & Safety SVP-99-123, Monthly Operating Repts for May 1999 for Quad Cities Nuclear Power Station,Units 1 & 2.With1999-05-31031 May 1999 Monthly Operating Repts for May 1999 for Quad Cities Nuclear Power Station,Units 1 & 2.With ML20195B2591999-05-19019 May 1999 Rev 66a to CE-1-A,consisting of Proposed Changes to QAP for Dnps,Qcs,Znps,Lcs,Byron & Braidwood Stations SVP-99-104, Monthly Operating Repts for Apr 1999 for Quad Cities Nuclear Power Station,Units 1 & 2.With1999-04-30030 April 1999 Monthly Operating Repts for Apr 1999 for Quad Cities Nuclear Power Station,Units 1 & 2.With SVP-99-102, Summary Rept of Changes,Tests & Experiments Completed, Covering Period 990201-0430. with1999-04-30030 April 1999 Summary Rept of Changes,Tests & Experiments Completed, Covering Period 990201-0430. with ML20205Q5291999-04-16016 April 1999 SER Concluding That Quad Cities Nuclear Power Station,Unit 1,can Be Safely Operated for Next Fuel Cycle with Weld O2BS-F4 in Current Condition Because Structural Integrity of Weld Will Be Maintained ML20205J6011999-04-0707 April 1999 Safety Evaluation Accepting Proposed Merger of Calenergy Co, Inc & Midamerican Holdings Co for Quad Cities Nuclear Power Station,Units 1 & 2 SVP-99-071, Monthly Operating Repts for Mar 1999 for Quad Cities Nuclear Power Station,Units 1 & 2.With1999-03-31031 March 1999 Monthly Operating Repts for Mar 1999 for Quad Cities Nuclear Power Station,Units 1 & 2.With ML20205C5671999-03-19019 March 1999 Simulator Four-Yr Certification Rept ML20207D2341999-03-0101 March 1999 Post Outage (90 Day) Summary Rept, for ISI Exams & Repair/Replacement Activities Conducted 981207-1205 ML20204B1571999-02-28028 February 1999 Monthly Operating Repts for Feb 1999 for Quad Cities,Units 1 & 2.With SVP-99-021, Quarterly Summary SER of Changes,Tests & Experiments Completed, Covering Period of 981101-990131,IAW 10CFR50.59 & 10CFR50.71(e).With1999-01-31031 January 1999 Quarterly Summary SER of Changes,Tests & Experiments Completed, Covering Period of 981101-990131,IAW 10CFR50.59 & 10CFR50.71(e).With ML20205D1311998-12-31031 December 1998 1998 Decommissioning Funding Status Rept for Yr Ending 981231 for Quad Cities Nuclear Power Station,Units 1 & 2 ML20205M7061998-12-31031 December 1998 Unicom Corp 1998 Summary Annual Rept. with SVP-99-007, Monthly Operating Repts for Dec 1998 for Quad Cities Nuclear Power Station,Units 1 & 2,IAW GL 97-02 & TS 6.9.With1998-12-31031 December 1998 Monthly Operating Repts for Dec 1998 for Quad Cities Nuclear Power Station,Units 1 & 2,IAW GL 97-02 & TS 6.9.With ML20196C8391998-11-30030 November 1998 Rev 0 to GE-NE-B13-01980-030-2, Assessment of Crack Growth Rates Applicable to Induction Heating Stress Improvement (IHSI) Recirculation Piping in Quad Cities Unit 1 SVP-98-364, Monthly Operating Repts for Nov 1998 for Quad Cities Nuclear Power Station,Units 1 & 2.With1998-11-30030 November 1998 Monthly Operating Repts for Nov 1998 for Quad Cities Nuclear Power Station,Units 1 & 2.With ML20196G1241998-11-30030 November 1998 COLR for Quad Cities Unit 1 Cycle 16 ML20196D9651998-11-30030 November 1998 Safety Evaluation Supporting Relief Requests CR-21 & CR-24, Respectively.Relief Request CR-23,proposed Alternative May Be Authorized,Per 10CFR50.55a & Relief Request CR-22 Was Withdrawn by Licensee ML20196C8731998-11-30030 November 1998 Rev 0 to GE-NE-B13-01980-30-1, Fracture Mechanics Evaluation on Observed Indications at Two Welds in Recirculation Piping of Quad Cities,Unit 1 Station ML20196A9761998-11-20020 November 1998 Safety Evaluation Re Licensee 180-day Response to GL 95-07, Thermal Binding of Safety-Related Power-operated Gate Valves ML20196A4191998-11-19019 November 1998 Safety Evaluation Accepting QA TR CE-1-A,Rev 66 Re Changes in Independent & Onsite Review Organization by Creating NSRB SVP-98-346, Monthly Operating Repts for Oct 1998 for Quad Cities Nuclear Power Station,Units 1 & 2.With1998-10-31031 October 1998 Monthly Operating Repts for Oct 1998 for Quad Cities Nuclear Power Station,Units 1 & 2.With SVP-98-358, Summary Rept of Changes,Tests & Experiments Completed, Including SEs Covering Period on 980716-1031.With1998-10-31031 October 1998 Summary Rept of Changes,Tests & Experiments Completed, Including SEs Covering Period on 980716-1031.With SVP-98-326, Monthly Operating Repts for Sept 1998 for Quad Cities Nuclear Power Station,Units 1 & 2.With1998-09-30030 September 1998 Monthly Operating Repts for Sept 1998 for Quad Cities Nuclear Power Station,Units 1 & 2.With ML20153D0191998-09-18018 September 1998 Part 21 Rept Re Defect in Gap Conductance Analyses for co- Resident BWR Fuel.Initially Reported on 980917.Corrective Analyses Performed Demonstrating That Current Operating Limits Bounding from BOC to Cycle Exposure of 8 Gwd/Mtu ML20153C6771998-09-17017 September 1998 Part 21 Rept Re Defect Relative to MCPR Operating Limits as Impacted by Gap Conductance of co-resident BWR Fuel at Facilities.Operating Limit for LaSalle Unit 2 & Quad Cities Unit 2 Will Be Revised as Listed ML20151T2711998-09-0404 September 1998 Safety Evaluation Accepting Licensee Response to NRC Bulletin 95-002 ML20151Y7261998-08-31031 August 1998 Monthly Operating Repts for Aug 1998 for Quad Cities Nuclear Power Station ML20237E2331998-08-21021 August 1998 Revised Pages of Section 20 of Rev 66 to CE-1-A, QA Topical Rept ML20151Y7301998-07-31031 July 1998 Revised MOR for Jul 1998 for Quad Cities Nuclear Power Station,Units 1 & 2 ML20237A6251998-07-31031 July 1998 Monthly Operating Repts for July 1998 for Quad Cities Nuclear Power Station,Unit 1 & 2 SVP-98-328, Summary Rept of Changes,Tests & Experiments Completed, Including SEs Covering Period of 971001-980715,per 10CFR50.59 & 10CFR50.71(e).With1998-07-15015 July 1998 Summary Rept of Changes,Tests & Experiments Completed, Including SEs Covering Period of 971001-980715,per 10CFR50.59 & 10CFR50.71(e).With SVP-98-249, Monthly Operating Repts for June 1998 for Quad Cities Nuclear Power Station,Units 1 & 21998-06-30030 June 1998 Monthly Operating Repts for June 1998 for Quad Cities Nuclear Power Station,Units 1 & 2 SVP-98-215, Monthly Operating Repts for May 1998 for Quad Cities Nuclear Power Station Units 1 & 21998-05-31031 May 1998 Monthly Operating Repts for May 1998 for Quad Cities Nuclear Power Station Units 1 & 2 ML20247N6281998-05-19019 May 1998 Rev 2 to COLR for Quad Cities Unit 2 Cycle 15 ML20216C0561998-04-30030 April 1998 Safe Shutdown Rept for Quad Cities Station,Units 1 & 2, Vols 1 & 2.W/22 Oversize Figures SVP-98-176, Monthly Operating Repts for Apr 1998 for Quad Cities Nuclear Power Station,Units 1 & 21998-04-30030 April 1998 Monthly Operating Repts for Apr 1998 for Quad Cities Nuclear Power Station,Units 1 & 2 ML20217D0281998-04-22022 April 1998 Part 21 Rept Re Additive Constants Used in MCPR Determination for Siemens ATRIUM-9B Fuel by Core Monitoring Sys Were Found to Be non-conservative.SPC Personnel Notified All Customers w/ATRIUM-9B Lead Test Assemblies ML20217G3951998-04-0808 April 1998 TS 3/4.8.F Snubber Functional Testing Scope Quad Cities Unit 2 TS (Safety-Related) Snubber Population 129 Snubbers SVP-98-128, Monthly Operating Repts for Mar 1998 for Quad Cities Nuclear Station Units 1 & 21998-03-31031 March 1998 Monthly Operating Repts for Mar 1998 for Quad Cities Nuclear Station Units 1 & 2 1999-09-30
[Table view] |
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AlJTOMATIC 41144 Vincenti Court VALVE NaviMtUSA 48375-1:24 internet Address www.automaticvalve. corn g _ g5ls
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Telephone B10.474.6700 Facsimile 810.474.6732 h World Class Air Valves and Controls To: JOHN MACKINNON From: TODD HUTCHINS Company NRC Date & Time: 5/2/97 3:34:09 PM Fax number: +1 (301) 816.5151 Pages: 5
Subject:
10CFR21 NOTIFICATION
- j GOOD AFTERNOON: I i
ATTACHED IS OUR 10CFR21 NOTIFICATION AND CORRECTIVE ACTION PER OUR D!SCUSSION/ MESSAGE. WE APOLOGlZE FOR THE TROUBLE AND INCONVENIENCE j THIS MAY CAUSE. !
IF YOU REQUIRE ADDITIONAL INFORMATION, PLEASE CONTACT ME.
BEST REGARDS, TOOD. I 2
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ADOCK 05000254 PDR l i
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DATE: May .2,1997
SUBJECT:
10CFR21 NOTIFICATION OF POTENTIAL DEFECT l
Addressees: All users of safety related solenoid valves manufactured by Automatic Valve (AV) incorporating AC solenoids.
Purpose:
AV is issuing this information notification to alert addressees of the potential for degraded performance and/or life expectancy of their AC solenoid valves if they exhibit a buzzing instead of humming sound when energized.
Definitions: BUZZ - any audible metallic clicking sound or sound greater in frequency and intensity than a hum. HUM - sound similar in frequency and intensity to florescent lights from an approximate 3 foot distance in a general office noise environment.
Ba~ckground: After installation of 89 AC solenoid valves by Vermont Yankee (W)in September 1996, BC Current of W advised Todd Hutchins of AV that 5 valves made noise
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when energized (#06-11 louder than the rest). AV assumed this noise to be normal AC hum since no known product or customer complaint failure had ever been received by c /
due to AC hum or buzz. Because of the preceding assumption and facts, AV took no action at that time. All AC solenoids hum to some extent.
April 24,1997 W obtained scram times during an auto scram of their plant. These scram times averaged identically to the original 1996 times. However, valve #06-11 took .
approximately .246 seconds (5 times) longer.
April 25,1997 W sent AV valve #06-11 for a failure analysis and visually inspected the internal components of any buzzing solenoids (W event report #97-0424).
1 April 28,1997 AV issued W an initial root cause report (#2531 attached) and shipped replacement solenoid parts that had been ' noise' tested. Definitions of noise were developed based on W experience and AV analysis of returns.
After interviews with AV inspection personnel, it was clear that valves at AV had been inspected for ' noise' but this had been done unofficially without any consistent acceptance / rejection criteria. Dimensional differences between solenoids that buzz and hum are not detectable. This was confirmed with 2 solenoid valve competitors. Definitions for acceptable AC hum and rejectable buzz for AC solenoids have now been added to in-process inspection points and final test procedures at AV.
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Recommendation: Even though the solenoid valve functioned, it was significantly slower due to the amount of metallic by-product from the buzzing solenoid plunger. Regardless of the manufacturer, solenoids should be checked for buzzing noises as it could degrade the performance and potentially the life of the valve. Any rebuilding of anyone's solenoid valves should require a ' noise' test. Since 1970 AV has not been advised of a single safety related AV product failure due to this cause. W confirmed j l
this with their check of the NPRDS. 4rMo-Fut.- /%i it.ewsno ry onrA S W &^t AV will retest, recertify, and reship at no charge any suspect product. AV will replace and i reship at no charge any component found to be field defective. i
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! This information intends to fulfill Automatic Valve's obligation under 10CFR21 and is being sent with all attachments to all known customers who have purchased AC solenoid valves
! with 10CFR21 imposed on their purchase order, Should you have any additional questions, please feel free to contact me.
1 j .Very truly yours, j AUTOMATIC VALVE CORPORATION 4
Todd Hutchins ,
! President s
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i REQUIREMENTS:
NUMBER: CORRECTlVE ACTION #2531 Type of Problem: Part B7122-145 [ ] Procedure Date: 04 25-1997 Whc found Problem: [ ] AV [ ] Supplier [ ] Distributor Customer Company: VERMONT YANKEE (VY) Contact Name: BC Current Address: Phone: 802 258-5457 Fax: 802 258-5544
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- 1. Team Working on Problem: Leader D. S. Swinton Members: K. W. Armstrong, T. TROY 2 Describe Problem (Initial Concern and Symptoms): The plunger on solenoid number 1 failed to return to it's de-actuated position in a timely manner when the solenoid was de-energized. As a consequence, air exhausted from the piston in the main valve slower than normal (reference VY event report #97-0424). Upon examination, the top of the solenoid plunger was found to be severely worn and had formed a peened edge around the top of the p!unger. This edge interfered with the plunger guide and caused the plunger to drag. The customer reported very loud buzzing of this solenoid at original installation.
Initial examination of the valve also revealed black dust Laboratory analysis of this dust confirmed it to be 400 i series stainless steel- the same material from which the plunger is constructed.
Acknowledged by: K. W. Armstrong
Title:
VP Ouahty Svstems Date: 04-27-1997
- 3. Contain Symptom (Action): Venfy that existing valves are free of buzzing (metalhc clicking as opposed to 60 cycle h im) by testing the plunger in a minimum of 8 positions and leaving the solenoid energized for a j minimum of 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />. Replace the plunger guide, spring, and plunger on all units that exhibit any buzzing I i (shipped 4-28 and 4-29).
Similar units have been in commercial use for over 40 years and identical units used for utikty service for over
- 7 yap:s and this is the first reported or known incidence of such a condition due to the solenoid being 4
continuously energized i Approved by K. W. Armstrong Title VP Ouahty Systems Est. Date: Act Date:4 27-1997
- 4. Root Causels of Problem: (initial assessment)
Loud audible buzzing of the solenoid indicates that the solenoid plunger was movbg while in the energized condition and that this movement caused premature and severe wear of the plunger.
Approved by K. W. Armstrong Title VF (,gality Systems Est Date- Act Date:4-27-1997
- 5. Corrective Action:
Since dimensional inspection cannot differentiate solenoids that buzz vs hum, add ' noise' test at in-process and finalinspection points as part of material dedication process.
Test Conducted to Verify it VY event report #97 0424 indicates solenoid noise remained consistent for 6 months. AV added additional 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> burn-in test to replacement units for VY with no change in noise.
Approved by K Armstrong
Title:
VP Quahty Systems Est Date: Act Date: 05-01-97
- 6. Implementation (Describe and include Applicable CN Numbers):
Added noise test to AC solenoid prints for in-process control and to final inspection procedure (CN #7413).
Approved by K. Armstrong
Title:
VP Ouality Systems Est. Date: Act Date: 05-01-97
- 7. Corrective Action to System to Prevent Recurrence:
Not yet assessed.
Approved by: Title Est Date: 05-30-97 Act Date:
- 8. Verification (Describe):
Approved by:
Title:
Est Date: Act Date:
e GENERAL INFORMATION or OTHER EVENT NUMBER: 32253 LICENSEE: AUTOMATIC VALVES CORPORATION NOTIFICATION DATE: 05/01/97 CITY: NOVI REGION: 3 NOTIFICATION TIME: 16.14 [ET]
COUNTY: STATE: MI EVENT DATE: 04/25/97 LICENSE #: '
AGREEMENT: N EVENT TIME: 00: 00 [EDT]
DOCKET: LAST UPDATE DATE: 05/02/97 NOTIFICATIONS KATHLEEN DOLCE (R1) RDO DICK WESSMAN EO NRC NOTIFIED BY: TODD HUTCHINS MARK RING (R3) RDO 4 HQ OPS OFFICER: JOHN MacKINNON VERN HODGE (RVIB) NRR '
AL CHAFFEE NRR EMERGENCY CLASS: NOT APPLICABLE RICH BARRETT IRD 10 CFR SECTION:
CCCC 21.21 UNSPECIFIED PARAGRAPH l
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EVENT TEXT )
PART 21 REPORT REGARDING FAILURE OF SCRAM SOLENOID PILOT VALVES ISSUED BY AUTOMATIC VALVES CORPORATION, NOVI, MICHIGAN. I IN SEPTEMBER, 1996, AUTOMATIC VALVES CORPORATION (AVCO) WAS NOTIFIED BY VERMONT YANKEE THAT A SCRAM SOLENOID PILOT VALVE WAS MAKING A BUZZING SOUND (RATHER THAN A HUMMING SOUND) WHEN ENERGIZED. AVCO DISCOUNTED THE REPORT AND TOOK NO ACTION AT THAT TIME BECAUSE ALL AC SOLENOIDS HUM '10 SOME EXTENT AND THEY ASSUMED THIS NOISE TO BE A NORMAL AC HUM SINCE NO KNOWN PRODUCT OR CUSTOMER COMPLAINT FAILURE HAD EVER BEEN RECEIVED BY AVCO DUE TO AC HUM OR BUZZ.
ON 04/24/97, WHILE VERMONT YANKEE WAS PERFORMING SCRAM TIME TESTING, THE CONTROL ROD ASSOCIATED WITH THE NOISY SCRAM SOLENOID PILOT VALVE #06-11-118 (WHICH HAD BEEN NOISY FOR THE LAST SIX MONTHS) HAD A SCRAM TIME THAT WAS SLOWER THAN THE OTHER CONTROL RODS THAT WERE BEING TESTED, BUT WAS WITHIN THE TECHNICAL SPECIFICATION TIME LIMITS. 1 1
AVCO HAS DETERMINED THAT THE NOISE WAS DUE TO METALLIC VIBRATION WITHIN THE SCRAM SOLENOID PILOT VALVE WHICH CAUSED THE VALVE PERFORMANCE TO DEGRADE.
DURING PAST ACCEPTANCE TESTS, AVCO DID NOT USE AUDIBLE NOISE EMANATING FROM i THE SCRAM SOLENOID PILOT VALVES AS AN ACCEPTANCE CRITERION. AVCO HAS l CHANGED THEIR PROCEDURES TO USE THIS CRITERION. AVCO HAS SUPPLIED SCRAM l SOLENOID PILOT VALVES TO 20 - 25 NUCLEAR POWER PLANTS IN THE UNITED STATES. l 000 UPDATE AT 1640 ON 05/02/97 BY AVCO TODD HUTCHINS TAKEN BY MacKINNON ***
AFTER INTERVIEWS WITH AVCO INSPECTION PERSONNEL, AVCO MANAGEMENT PERSONNEL DETERMINED THAT VALVES AT AVCO HAD BEEN INSPECTED FOR " NOISE" BUT THIS HAD (Continued on next page) i
bICENSEE: AUTOMATIC VALVES COR PAGE # 2 OF EVENT NUi4BER: 32253 BEEN DONE UNOFFICIALLY WITHOUT ANY CONSISTENT ACCEPTANCE / REJECTION CRITERIA. DIMENSIONAL DIFFERENCES BETWEEN SOLENOIDS THAT BUZZ AND HUM ARE NOT DETECTABLE. THIS WAS CONFIRMED WITH TWO AVCO SOLENOID VALVE COMPETITORS. DEFINITIONS FOR ACCEPTABLE AC HUr. AND REJECTABLE BUZZ FOR AC SOLENOIDS HAVE NOW BEEN ADDED TO IN-PROCESS INSPECTION POINTS AND FINAL i
TEST PROCEDURES AT AVCO.
! AVCO RECOMMENDATION: EVEN THOUGH THE SOLENOID VALVE FUNCTIONED, IT WAS SIGNIFICANTLY SLOWER DUE TO THE AMOUNT OF METALLIC BY-PRODUCT FROM THE DUZZING SOLENOID PLUNGER. REGARDLESS OF THE MANUFACTURER, SOLENOIDS SHOULD BE CHECKED FOR BUZZING NOISES AS IT COULD DEGRADE THE PERFORMANCE AND
, POTENTIALLY THE LIFE OF THE VALVE. ANY REBUILDING OF ANY SUPPLIER'S
- SOLENOID VALVES REQUIRE A ' NOISE" TEST. SINCE 1970, AVCO HAS NOT BEEN
)' ADVISED OF A SINGLE SAFETY RELATED AVCO PRODUCT FAILURE DUE TO THIS CAUSE.
VERMONT YANKEE CONFIRMED THIS WITH A CHECK OF THE NUCLEAR PLANT RELIABILITY
} DATA SYSTEM.
] AVCO WILL RETEST, RECERTIFY, AND RESHIP AT NO CHARGE ANY SUSPECTED PRODUCT.
' AVCO WILL REPLACE AND RESHIP AT NO CHARGE ANY COMPONENT FOUND TO BE FIELD DEFECTIVE.
2 THE OPERATIONS OFFICER NOTIFIED R1DO (MICHAEL MODES), R2DO (CHUCK CASTO),
R3bO (MARK RING), R4DO (JOE TAPIA) & NRR VERN HODGE.
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