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Category:GENERAL EXTERNAL TECHNICAL REPORTS
MONTHYEARML20207E8011999-05-19019 May 1999 Non-proprietary Rev 2 to HI-981933, Design & Licensing Rept DBNPS Unit 1 Cask Pit Rack Installation Project ML20205K5781998-12-31031 December 1998 Waterhammer Phenomena in Containment Air Cooler Swss ML20217P8041998-04-0707 April 1998 11RFO OTSG ECT Insp Scope ML20196B8771996-12-16016 December 1996 First Amended & Restated Master Decommissioning Trust Agreement Dtd as of 961231 Between Toledo Edison Co & Mellon Bank ML20196B8951996-12-16016 December 1996 First Amended & Restated Master Decommissioning Trust Agreement Dtd as of 961216 Between Cleveland Electric Illuminating Co & Mellon Bank ML20134D7821996-05-0808 May 1996 Rev 1 to Instrument Drift Data Analysis Methodology & Assumptions ML20091S4311995-08-31031 August 1995 USI A-46 Seismic Evaluation Rept. W/61 Oversize Drawings ML20138J1411994-02-28028 February 1994 Rev 0 to IPEEE,A-46 & Design In-Structure Response Spectra for Selected Bldgs at Dbnps ML20067D3311993-08-31031 August 1993 Technical Evaluation Rept,Evaluation of B&Wog Pressurizer Surge Line Thermal Stratification Program to Address NRC Bulletin 88-11 ML20091P5721991-10-31031 October 1991 Reactor Containment Bldg Integrated Leak Rate Test Including,Type A,B & C Periodic Test Results ML20070Q1911991-03-25025 March 1991 NRC Form 474 Simulation Facility Certification ML20058L1891990-08-0101 August 1990 Dcrdr Human Engineering Discrepancy Repts 1988 Summary Addendum 1,Vol 1 ML20006E3671990-01-11011 January 1990 Toledo Edison Co Mark-BZ Fuel Assembly Seismic & LOCA Analysis. ML20094J0841989-12-0808 December 1989 Investigation of Acoustic Leak Monitoring for NRC Region Iii. Info Partially Deleted ML19324C1761989-10-30030 October 1989 Hpi/Makeup Nozzle Weld Overlay Repair Contingency Plan. ML19327B0161989-10-11011 October 1989 Cycle 7 LOCA Limits. ML20245K6751989-08-0202 August 1989 Rev 2 to Review 18 Month PM Items for Diesel Generator & Evaluate Extension to 30 Months ML20151Z1941988-08-11011 August 1988 Rept on Reactor Vessel Continuous Vent Line Performance, ML20234F2501988-01-0606 January 1988 Rev 3 to App R Compliance Assessmemt Rept ML20147C0851987-12-0101 December 1987 Fifth Refueling Outage Executive Summary. Related Documents Encl ML20237J9781987-08-24024 August 1987 Performance Indicators for Davis-Besse Nuclear Power Station,Salp 6,Weekly Rept 3 for Period Ending 870824 ML20214J1891987-05-0505 May 1987 Rev 2 to App R Compliance Assessment Rept ML20206J5001987-03-31031 March 1987 Dcrdr Special Study Plans for Davis-Besse ML20212G7461987-01-0707 January 1987 Rept of Emergency Evacuation Review Team on Emergency Response Plans for Perry & Davis-Besse Nuclear Power Plants ML20214E0761986-11-17017 November 1986 Auxiliary Feedwater Calculation Summary ML20211E0651986-09-26026 September 1986 Transient Assessment Program Rept,Davis-Besse Unit 1 Reactor Trip on High Flux,840302 ML20214T7501986-09-11011 September 1986 DB Small-Break LOCA Analysis Assumptions Evaluation ML20154Q6531986-02-28028 February 1986 Westinghouse Owners Group Position on Davis-Besse Event ML20141E6691985-11-30030 November 1985 B&W Owners Group Action Plan for Review of 850609 Davis-Besse Transient ML20138H4891985-11-25025 November 1985 Rev 17 to Seismic Category I Piping Sys Support & Hanger Discrepancies ML20136H0951985-11-15015 November 1985 Revised Davis-Besse Reactor Protection Sys Single Failure Analysis ML20137H3971985-11-12012 November 1985 Rev 16 to Seismic Category I Piping Sys Support & Hanger Discrepancies Summary Rept ML20137S9031985-10-29029 October 1985 Toledo Edison Davis-Besse Nuclear Power Station Unit 1 Seismic Category I Piping Sys Support & Hanger Discrepancies,Summary Rept ML20209H5861985-10-28028 October 1985 Rev 3 to Course of Action ML20137S8241985-10-22022 October 1985 Rev 14 to Seismic Category I Piping Sys & Hanger Discrepancies,Summary Rept ML20209H6481985-10-15015 October 1985 Rev 3 to Auxiliary Feedwater Pump Turbine Overspeed Trip Throttle Valve Problem ML20138J4811985-10-15015 October 1985 Seismic Category I Piping Sys Support & Hanger Discrepancies ML20133M9911985-10-0808 October 1985 Rev 12 to Seismic Category I Piping Sys Support & Hanger Discrepancies,Summary Rept ML20133K9881985-10-0404 October 1985 Independent Mgt Assessment of Toledo Edison Davis-Besse QA Program ML20138A9411985-09-24024 September 1985 Rev 10 to Safety-Related Piping Sys Support & Hanger Discrepancies, Summary Rept ML20132E4471985-09-17017 September 1985 Rev 9 to Safety-Related Piping Sys Support & Hanger Discrepancies, Summary Rept ML20137C3021985-09-0909 September 1985 Toledo Edison Co Davis-Besse Nuclear Power Station Course of Action Rept ML20137M5431985-09-0909 September 1985 Vols 1 & 2 of Davis-Besse Course of Action ML20135D7421985-09-0303 September 1985 Rev 7 to Safety-Related Piping Sys Support & Hanger Discrepancies, Summary Rept ML20133K9941985-08-30030 August 1985 Rept of Assessment of Actions at Davis-Besse Resulting from 850609 Loss of Feedwater Event ML20134Q0161985-08-27027 August 1985 Rev 6 to Safety-Related Piping Sys Support & Hanger Discrepancies, Summary Rept ML20137U3061985-08-16016 August 1985 Rev 5 to Safety-Related Piping Sys Support & Hanger Discrepancies, Summary Rept ML20134B8371985-08-0909 August 1985 Rev 4 to Safety-Related Piping Sys Support & Hangar Discrepancies, Summary Rept ML20133M3261985-07-26026 July 1985 Rev 3 to Safety-Related Piping Sys Support & Hanger Discrepancies,Summary Rept ML20126L9021985-07-0505 July 1985 Rev 1 to Action Plans 5,6 & 7, Steam & Feedwater Rupture Control Sys Trip/Msiv Closure 1999-05-19
[Table view] Category:TEXT-SAFETY REPORT
MONTHYEARML20217K1231999-10-14014 October 1999 Revised Positions for DBNPS & Pnpp QA Program ML20217D5441999-09-30030 September 1999 Monthly Operating Rept for Sept 1999 for Davis-Besse Nuclear Power Station.With ML20211R0811999-08-31031 August 1999 Monthly Operating Rept for Aug 1999 for Davis-Besse Nuclear Power Station,Unit 1.With ML20211B0271999-08-13013 August 1999 SER Accepting Second 10-year Interval Inservice Insp Requests for Relief RR-A16,RR-A17 & RR-B9 for Plant, Unit 1 ML20210Q8541999-07-31031 July 1999 Monthly Operating Rept for July 1999 for Davis-Besse Nuclear Power Station,Unit 1.With ML20209E6231999-06-30030 June 1999 Monthly Operating Rept for June 1999 for Davis-Besse Nuclear Power Station,Unit 1.With ML20195K2871999-06-16016 June 1999 Safety Evaluation Accepting Licensee Response to GL 95-07, Pressure Locking & Thermal Binding of Safety-Related Power-Operated Gate Valves ML20195F4871999-05-31031 May 1999 Monthly Operating Rept for May 1999 for Davis-Besse Nuclear Power Station,Unit 1.With ML20207E8011999-05-19019 May 1999 Non-proprietary Rev 2 to HI-981933, Design & Licensing Rept DBNPS Unit 1 Cask Pit Rack Installation Project ML20207F4351999-05-0404 May 1999 Rev 1 to DBNPS Emergency Preparedness Evaluated Exercise Manual 990504 ML20206M6341999-04-30030 April 1999 Monthly Operating Rept for Apr 1999 for Davis-Besse Nuclear Station,Unit 1.With ML20205M2931999-03-31031 March 1999 Monthly Operating Rept for Mar 1999 for Davis-Besse Nuclear Power Station.With ML20207J1461999-02-28028 February 1999 Monthly Operating Rept for Feb 1999 for Davis-Besse Nuclear Power Station,Unit 1.With ML20199H5931999-01-20020 January 1999 Safety Evaluation Accepting Thermo-Lag Re Ampacity Derating Issues for Plant ML20204J6751998-12-31031 December 1998 1998 Annual Rept for Dbnps,Unit 1,PNPP,Unit 1 & BVPS Units 1 & 2 ML20199E2501998-12-31031 December 1998 Monthly Operating Rept for Dec 1998 for Davis-Besse Nuclear Power Station,Unit 1.With ML20206B0101998-12-31031 December 1998 1998 Annual Rept for Firstenergy Corp, for Perry Nuclear Power Plant & Davis-Besse Nuclear Power Station.Form 10-K Annual Rept to Us Securities & Exchange Commission for Fiscal Yr Ending 981231,encl ML20205K5781998-12-31031 December 1998 Waterhammer Phenomena in Containment Air Cooler Swss ML20197J3441998-11-30030 November 1998 Monthly Operating Rept for Nov 1998 for Davis-Besse Nuclear Power Station,Unit 1.With ML20195D0001998-10-31031 October 1998 Monthly Operating Rept for Oct 1998 for Davis-Besse Nuclear Power Station,Unit 1.With ML20155B6781998-10-28028 October 1998 Safety Evaluation Accepting Proposed Reduction in Commitment Changes in QA Program Matl Receipt Insp Process ML20154H5801998-09-30030 September 1998 Monthly Operating Rept for Sept 1998 for Davis-Besse Nuclear Power Station,Unit 1.With ML20151W1611998-08-31031 August 1998 Monthly Operating Rept for Aug 1998 for Dbnps.With ML20237E3171998-08-21021 August 1998 ISI Summary Rept of Eleventh Refueling Outage Activities for Davis-Besse Nuclear Power Station ML20237B1681998-07-31031 July 1998 Monthly Operating Rept for July 1998 for Davis-Besse Nuclear Power Station,Unit 1 ML20236U5011998-07-23023 July 1998 Special Rept:On 980624,Unit 1 Site Damaged by Tornado & High Winds.Alert Declared by DBNPS Staff,Dbnps Emergency Response Facilities Activiated & Special Insp Team Deployed to Site by Nrc,As Result of Event ML20236R1441998-07-15015 July 1998 SER Related to Quality Assurance Program Description Changes for Davis-Besse Nuclear Power Station,Unit 1 ML20236N7451998-06-30030 June 1998 Monthly Operating Rept for June 1998 for Davis-Besse Nuclear Power Station,Unit 1 ML20236K3981998-06-30030 June 1998 SER Accepting in Part & Denying in Part Relief Requests from Some of ASME Section XI Requirements as Endorsed by 10CFR50.55a for Containment Insp for Davis-Besse Nuclear Power Station,Unit 1 ML20236K5131998-06-29029 June 1998 Safety Evaluation Accepting Proposed Alternate Emergency Operations Facility Location for Davis-Besse Nuclear Power Station,Unit 1 ML20248F7441998-05-31031 May 1998 Reactor Vessel Working Group,Response to RAI Regarding Reactor Pressure Vessel Integrity ML20249A4121998-05-31031 May 1998 Monthly Operating Rept for May 1998 for Davis-Besse Nuclear Power Station,Unit 1 ML20196B5221998-05-23023 May 1998 10CFR50.59 Summary Rept of Facility Changes,Tests & Experiments Dbnps,Unit 1 for 960602-980523 ML20236E7581998-05-19019 May 1998 Rev 0 to Davis-Besse Unit 1 Cycle 12 Colr ML20236N7501998-04-30030 April 1998 Rev 2 to Monthly Operating Rept for Apr 1998 for Davis-Besse Nuclear Power Station,Unit ML20247F6721998-04-30030 April 1998 Monthly Operating Rept for Apr 1998 for Davis-Bess Nuclear Power Station,Unit 1 ML20249A4141998-04-30030 April 1998 Revised Monthly Operating Rept for Apr 1998 for Davis-Besse Nuclear Power Station,Unit 1 ML20217P8041998-04-0707 April 1998 11RFO OTSG ECT Insp Scope ML20216B4041998-03-31031 March 1998 Monthly Operating Rept for Mar 1998 for Davis-Besse Nuclear Power Station,Unit 1 ML20216C5131998-02-28028 February 1998 Monthly Operating Rept for Feb 1998 for Davis-Besse Nuclear Power Station,Unit 1 ML20202D3721998-01-31031 January 1998 Monthly Operating Rept for Jan 1998 for Davis-Besse Nuclear Power Station,Unit 1 ML20199G6321998-01-26026 January 1998 Rev 1 to Davis-Besse Unit 1,Cycle 11,COLR ML20198R4771998-01-13013 January 1998 SER Approving Second 10-year Interval Inservice Inspection Program Plan Requests for Relief for Davis-Besse Nuclear Power Station,Unit 1 ML20198K7931997-12-31031 December 1997 Monthly Operating Rept for Dec 1997 for Davis-Besse Nuclear Power Station,Unit 1 ML20217K6401997-12-31031 December 1997 1997 Annual Rept First Energy ML20203A3931997-11-30030 November 1997 Monthly Operating Rept for Nov 1997 for Davis-Besse Nuclear Power Plant,Unit 1 ML20198S5371997-10-31031 October 1997 Monthly Operating Rept for Oct 1997 for Davis-Besse Nuclear Power Station ML20217H7701997-09-30030 September 1997 Monthly Operating Rept for Sept 1997 for Davis-Besse Nuclear Power Station,Unit 1 ML20216H3261997-08-31031 August 1997 Monthly Operating Rept for August 1997 for DBNPS ML20217K0241997-07-31031 July 1997 Monthly Operating Rept for Jul 1997 for Davis Besse Nuclear Power Station,Unit 1 1999-09-30
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Turbine Bypass Valve 2-2 (SPl3A2) Problem Analysis Submitted by Matthew B. H.synes Plan 494 and 9b June 18, 1985 Page 1 of 3 This report has been prepared in accordance with the " Guidelines to Follow khen Troubleshooting or Perforrsing Investigative Actions into the Root Causes Surrounding the June 9, 1985 Reactor Trip, Rev. 2.
Introduction It should be stated that all information obtained through data printouts and operator interviews points to the fact that the turbine bypass v.alve (TEV) fatted between 06:55 and 06:57 on the morning of the June 9, 1983 reactor trip.
Summary of Dat_4 The following information was obtained through review of data and through interviews with the following people from the operattuna staff present at the time the valve is thought to have failed; William O'Connor, Louis Simon, Scott Wise, and Gene lit tlebrecht. When torrelating the pressure vs. time graph with the aldrie readout for the ttsse around the June 9, 19 M's reactor trip, the turbine bypass actpoint pressure of 1015 pets was escceded for approntmately two seconds before the Natn Steam Isolation Valves (M31Vs) closed whlCh t hanged the IoglC and prevented the TbV's from opening. On the morning of June 9, 198S the f ollowing sc<picure of events was taken to heat up the main steam line to the fiteam Generstor (SG) pressure and temperature in arcord4nte with procedure Pp 1*J'.03, Trip Recovery. The TBV header isolation valven '13 709 and MS 710 were closed at or around 03:40 along with the m4jority of the steam traps on the main steam line. At 05: 41 both M31V bypana valves were open to begin line heat up. These M11V bypass valves Hh 100A and MS lotA are one inch lines. For this reason must of the traps are closed to facilitate 4 quicker he4t up.
Once the line had built up enough temperature and pressure the operators went down and opened the bypass 4round MS 709 and MS 710 to begin heatup of the TilV headers. At 06: 42 both MSIV's opened and between this time .a nd 06: 54 the isolation valven MS 709 and MS 110 to the ThV headers were opened. (It should be noted that valves MS 109 and M!! 710 are manually operated anit when being operated one must stand faring the TDV's on both headers no any failures on the fi1V's could have been noted. ) At this time the re4ctor operator reeptested that two TilV's on cas h header be isolated to control tha 50 pressure more easily. Ou both heasless the til and #3 valves worn isolatnd f rom the condenser just down stream leaving the 4 valveis on each header to rhntrol the 50 scoldown. Also around this time all ste.em traps should have been reopened. At OfuS4 t he 11 header ThV's 411 opened with just ". Pill 1J tontrolling and dumping to the condenser. At 06 r $$ the A he vder, which han pacet ion 4ble w4t er drainage, begin to have its ThV's open with I and 3 opening first. At 06 "s6.0009', thru 06136.01110 the TbV *iP11A2 showed not closed, rioned swepannt e twa(e and then had no i further readings. This is believed to be the time of failuse. At about
? tSin time the interviewed operators, who were in the sontrol room, heard 4 loud creCiting sound like that he std f rom a water hammer. Drott Wise went l
iISU'/2'/()P4 5 (1306)9 P1)H A1)OCK ObOOO*846 y P1)I(
down to the TBV headers and found the valve SP13A2 in the present condi-tion. It should be noted that the A header as compared to the 8 header has a greater length of piping leading to it which may have had an effect
( on why no valves in the B header f ailed.
l In reviewing maintenance done on SP13A2 the work was limited to repacking l
work and calibration of the position indicator. The TBV SP13A2 has no record of maintenance testing and there are no scheduled surveillance tests for the TBVs.
Chante Analysis The change analysis revealed no additional relevant data.
Hypotheses The basis of the hypotheses were from the information provided by opera-tors and from inspection of the valve se found. With both the yoke and l the housing cracked many factors were taken into consideration. The two
! main facts that are very evident age the valve stem thread dimension which l were lossed in letter los #E85-152A File #MtiS.! and the fact that the pin i
connector was in contact with the sleeve assembly. When the above two a factors were considered with the operator interviews the hypotheses were formed.
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Hypotheses
! 1. Water hammer
- 2. Valve internals assembled in a fashion to inhibit proper operation.
- 3. Valve positioner malfunction
! The most likely cause is thought to be a combination of hypotheses 1 and 2.
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TOLEDO EDISDN Log No. E85-152A File No. EN 5.1 June 13, 1985 SP 13A2 and Associated Piping Walkdown 6/13/85 at 0930:
Hanger ESD-3-H33 - No move =ent apparent on snubber S Header Valves and Actuators show no visible damage Valve upper stem thread shown in inches: .
13Al 7/8 13A2 2-1/8 13A3 1-1/16 1331 47/64 1332 1-1/8 1333 1-3/16
>$ 712 no visual da age.
E3D-108-H5 - =inimal movement in south direction.
No visual damage to insullation upstream'of valve.
!$ 47 Line frce SP13A2 to condenser shows no visual signs of water hammer damage.
End 1010,6/13/85.
Mkp N pal k N Matthew Rafnes Mike Kunnir Assistant Engineer Assistant Engineer THE TCLECC EC:00?J CCf/Da*4Y LCGCf4 oLAZA 300 MAC:5Cr4 AVE?JLE TOLECO C+0 43M2
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***'T's, J w C W4 ACTION PL AN l rt A o a-nie.+u a r A r.t is.*e ! 9a & 9b 1 a'
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iihi loin entraniu- NR P Ald[1 in Ts Determine the Cause of Turbine Bypass Valve 2-2 (SP13A2) Failure H. Raynes ,
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l6/18/85
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i STEP
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t j j ...i All steps of this Action Plan are to be performed in accordance 1
! with the latest revision of " Guidelines to Follow When Trouble-shooting or Performing Investigative Actions into the Root , _._.. _ _ _ _ . _ _ _. _
i <
, Causes Surrounding the June 9, 1985 Reactor Trip."
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- l. To test Hypotheses 1 and 2 lH.Raynes l , . - ._ _ . ._
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- Disassemble valve and inspect components for damage and i > -
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j improper assembly. Compare conditions to design and assembly ;
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- 2. fTotestHypothesis3 l M. Raynes l ._. _ _ _ _ . . _ , _
_- 7 l, Test and/or calibrate valve positioner. !
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