Letter Sequence Meeting |
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Results
Other: ML031280623, ML031680617, ML031681113, ML031970005, ML031970011, ML032110226, ML032200366, ML032200534, ML032260157, ML032330476, ML032330494, ML032340734
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MONTHYEARML0312806232003-05-0808 May 2003
Memo, Bottom Mounted Instrumentation Leakage Issue - Nondestructive Examination and Repair Options
Project stage: Other
ML0316806172003-06-17017 June 2003
Summary of South Texas, Unit 1 Conference Call Regarding Bottom Mounted Instrumentation Leakage Issue; Status of Activities
Project stage: Other
ML0316811132003-06-17017 June 2003
Summary of Conference Call with STP Nuclear Operating Co Regarding South Texas, Unit 1, Bottom Mounted Instrumentation Leakage Issue; Status of Activities
Project stage: Other
NOC-AE-03001555, Summary of ASME Code Calculation Performed for Repair of Bottom Mounted Instrumentation Penetrations2003-07-0202 July 2003
Summary of ASME Code Calculation Performed for Repair of Bottom Mounted Instrumentation Penetrations
Project stage: Request
ML0319700052003-07-15015 July 2003
Summary of May 20, 2003, Telephone Conference Re. Bottom Mounted Instrumentation Penetration Leakage Issue
Project stage: Other
ML0319700112003-07-15015 July 2003
Summary of May 29, 2003, Telephone Conference Re. Bottom Mounted Instrumentation Penetration Leakage Issue
Project stage: Other
ML0323407342003-07-16016 July 2003
Pacific Northwest National Lab., Assessment of NDE of STP, Unit 1, Bottom-Mounted Instrumentation Nozzles
Project stage: Other
ML0320901442003-07-17017 July 2003
Handouts for Meeting with South Texas Project Nuclear Operating Company, South Texas Project, Unit 1, Bottom Mounted Instrumentation Penetration Leakage Issue
Project stage: Meeting
NOC-AE-03001568, Revised Summary of ASME Code Calculations Performed for Repair of Bottom Mounted Instrumentation Penetrations2003-07-23023 July 2003
Revised Summary of ASME Code Calculations Performed for Repair of Bottom Mounted Instrumentation Penetrations
Project stage: Request
ML0321102262003-07-30030 July 2003
Withholding Ltr, Unit 1, Title 10 of the Code of the Federal Regulations Concerning Bottom Mounted Instrumentation Forced Outage
Project stage: Other
ML0321206412003-08-0808 August 2003
Summary of Meeting with South Texas Nuclear Operating Company Re South Texas Project, Unit 1, Bottom-Mounted Instrumentation (Bmi) Penetration Leakage Issue
Project stage: Meeting
ML0321003212003-08-0808 August 2003
Summary of Meeting with South Texas Project Nuclear Operating Company, South Texas Project, Unit 1, Bottom Mounted Instrumentation (Bmi) Penetration Leakage Issue
Project stage: Meeting
ML0320901592003-08-0808 August 2003
Summary of Meeting with South Texas Project Nuclear Operating Company, South Texas Project, Unit 1, Bottom Mounted Instrumentation Penetration Leakage Issue
Project stage: Meeting
ML0322005342003-08-0808 August 2003
Summary of Telephone Conference with South Texas Project Nuclear Operating Company Re South Texas Project, Unit 1, Bottom-Mounted Instrumentation (Bmi) Penetration Leakage Issue; Status of Activities
Project stage: Other
ML0322003662003-08-0808 August 2003
Summary of Staff Observation/Audit/Assessment of Visit to Framatome, Inc. ASME Design Calculations
Project stage: Other
ML0322601572003-08-14014 August 2003
Withholding from Public Disclosure, Westinghouse Field Service Procedure STD-FP-1998-8202, Rev Figure 6.1, MB8435
Project stage: Other
ML0323304762003-08-21021 August 2003
Summary of 06/19/03 Telephone Conference Status of Bottom-Mounted Instrumentation Penetration Leakage Issue
Project stage: Other
ML0323304942003-08-21021 August 2003
Summary of 06/12/03 Telephone Conference Status of Bottom-Mounted Instrumentation Penetration Leakage Issue
Project stage: Other
2003-07-02
[Table View] |
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Category:Meeting Briefing Package/Handouts
MONTHYEARML24080A1292024-03-25025 March 2024
March 25, 2024, Pre-Submittal Meeting for STP QA Plan Change
ML22243A1312022-08-31031 August 2022
STP Nuclear Operating Company August 31, 2022 Presentation - Pre-Submittal Meeting for Updated Main Steam Line Break and Locked Rotor Dose Consequence Analysis to Address Extended Cooldown Timelines
ML22214A0972022-08-0202 August 2022
Presentation by South Texas Project
ML22153A2942022-06-17017 June 2022
Richardsd-hv-th28
ML21203A2702021-07-26026 July 2021
Presentation - 7-26-21 Meeting with STPNOC Proposed South Texas Project Moderator Temperature Coefficient TS Change
ML20125A3362020-05-0404 May 2020
STP Presubmittal Meeting Exigent Accumulator LAR 2020-05-05 Presentation L-2020-LRM-0039
ML19326A0072019-11-22022 November 2019
Pre-Application Public Meeting for Proposed License Amendment Request to Revise the STPEGS Emergency Plan - December 3, 2019
ML16356A0612016-12-21021 December 2016
12/21/2016 South Texas Project Aluminum Bronze Aging Management Request for Additional Information
ML16264A3632016-09-20020 September 2016
Pre-Application Public Meeting for Proposed License Amendment Request to Revise the STPEGS Emergency Plan Staff Augmentation Times
ML16210A0442016-07-28028 July 2016
STP Nuclear Operating Company Handouts for July 28, 2016 Public Meeting on GSI-191
ML16172A0192016-07-25025 July 2016
STP Aluminum Bronze Selective Leaching Public Meeting - June 21, 2016
ML16202A4872016-07-21021 July 2016
07/21/2016 Talking Points, Supplemental Information for South Texas Project and NRC Public Meeting
ML16111A0272016-04-18018 April 2016
STP Nuclear Operating Company Slideshow for Public Meeting on April 21, 2016 for GSI-191 Resolution (CAC No. MF2400-01)
ML16062A3042016-03-0202 March 2016
TS 5.3.2 LAR Pre-Submittal Meeting Presentation - March 2, 2016
ML16033A0042016-01-19019 January 2016
Applicant's Slides for STP Meeting on Aluminum Bronze Aging Management
ML15274A5992015-10-0101 October 2015
10-01-15 Public Phone Call
ML15271A3042015-09-28028 September 2015
Public Phone Call Meeting Description of Supplement 2 to STPNOC Risk-Informed Licensing Application to Address GSI-191 and Respond to GL-2004-02
ML15111A0582015-04-15015 April 2015
Licensee Handouts (2 of 2) for 4/22/2015 Public Meeting Possible Roverd Section on Fixed Filtration (TAC Nos. MF2400-MF2409)
ML15111A0562015-04-15015 April 2015
Licensee Handouts (1 of 2) for 4/22/2015 Public Meeting Revised Roverd Section on Large Early Release Frequency Change for Large Break Loss-of-Coolant Accident(Tac Nos. MF2400-MF2409)
ML15056A3862015-02-25025 February 2015
NRC Slides for February 25, 2015 Public Meeting with STPNOC Concerning GSI-191
ML15049A4882015-02-18018 February 2015
Slides for February 25, 2015 Public Meeting
ML15034A1512015-02-0505 February 2015
Integrated Leak Rate Test (ILRT) from 10 Years to 15 Years. NRC Public Meeting Slides - ILRT License Amendment
ML15034A1142015-02-0404 February 2015
STP Risk- Informed Approach to GSI - 191 Roverd 2015 Meeting Blue 1 29 15
ML14192A9842014-08-0404 August 2014
Summary of Pre-Licensing Meeting with STP Nuclear Operating Company to Discuss Future License Amendment Request to Revise TS 6.9.1.6.b.9 to the Leading Edge Flow Meter Technology for Feedwater Flow Measurement
ML14120A0112014-04-29029 April 2014
4/29/2014 - South Texas Project Regulatory Approach for Risk-Informed Pilot Submittal Presentation Relating to 10 CFR 50.46c
ML13352A1422013-12-16016 December 2013
GSI-191 Licensing Submittal Comparison of Changes Between Rev 1 and Rev 2
ML13352A1242013-12-16016 December 2013
NRC Staff Slides South Texas Project Risk-Informed Generic Safety Issue - 191, December 16, 2013
ML13316B9052013-11-13013 November 2013
Albrz Testing Update for NRR Final
ML13150A2162013-05-23023 May 2013
Licensee Slides for 5/23/13 Public Meeting Regarding GSI-191
ML13140A2562013-05-20020 May 2013
Licensee Slides for 5/23/13 Meeting - STP Pilot Submittal for Risk Informed Approach to Resolving GSI-191
ML13023A3342013-02-25025 February 2013
1/15/2013 Summary of Public Meetings Conducted to Discuss Draft Supplemental Environmental Impact Statement Related to Review of South Texas Project, Units 1 & 2, License Renewal Application
ML13051A8552013-02-20020 February 2013
Licensee Slides for 3/5/13 Pre-Application Meeting for Proposed Licensing Action to Revise the Fire Protection Program at STP
ML13029A4972013-01-15015 January 2013
Slides - Preliminary Site-Specific Results of the Environmental Review for South Texas Project License Renewal
ML12297A3312012-11-27027 November 2012
Summary of Prelicensing Meeting with STP Nuclear Operating Company to Discuss Proposed Amendment for Approval of Revised Fire Protection Program Related to Alternate Shutdown Capability for South Texas, Units 1 and 2
ML12264A3202012-10-11011 October 2012
Meeting Handout for 10/11/12 Pre-licensing Meeting License Amendment Request to Revise the Fire Protection Program
ML12145A4382012-05-18018 May 2012
Licensee Handout on Calibration and Benchmarking of Single and Two-Phase Jet Cfd Models
ML1209004042012-03-30030 March 2012
3-27-2012 - STP Public Meeting Handout from Nuclear Innovation North America, LLC on Fukushima Lessons Learned for South Texas Project Units 3 and 4
ML1205405572012-02-22022 February 2012
Licensee Slides for 03/1/12 Meeting with STP Nuclear Operating Company Meeting to Discuss GSI-191
ML1205405702012-02-22022 February 2012
Uncertainty Modeling of LOCA Frequencies and Break Size Distributions for the STP GSI-191 Resolution
ML1205407582012-02-22022 February 2012
STP Summary of January Meeting
ML1204400652012-02-0909 February 2012
Licensee Slides for 2/9/12 Meeting Regarding GSI-191
ML1133505632011-12-0101 December 2011
Licensee Presentation from 12/1/11 Meeting Via Conference Call to Discuss Risk-Informed GSI-191,Assessment of Debris Accumulation on Pressurized Water Reactor Sump Performance
ML1130506322011-10-26026 October 2011
Licensee Handouts from November 1, 2011 Meeting with STP Nuclear Operating Company on GSI-191
ML1127701762011-10-0303 October 2011
Licensee Handouts from 10/3/11 Meeting STP LOCA Frequency
ML1127702032011-10-0303 October 2011
Licensee Slides from 10/3/11 Meeting LOCA Frequencies, Final Results
ML1123508732011-08-22022 August 2011
Models and Methods Used for Casa Grande
ML1123508832011-08-22022 August 2011
LOCA Initiating Event Frequencies and Uncertainties Status Report
ML1120707072011-07-26026 July 2011
Meeting Notice with South Texas Project, Units 1 and 2 - Licensee Slide Models and Methods Used for Casa Grande
ML1120707292011-07-26026 July 2011
Meeting Notice with South Texas Project, Units 1 and 2 - Licensee Slides Computational Fluid Dynamics Validation Plan
ML1118903802011-07-0707 July 2011
Licensee Slides, LOCA Initiating Event Frequencies and Uncertainties(Draft)
2024-03-25
[Table view] |
Text
Bottom Mounted Instrument Penetration Condition Resolution
/17/03 1
STP Participants Tom Jordan VP, Engineering & Tech Services Mark McBurnett Manager, Quality & Licensing Steve Thomas Manager, Plant Design Tim Bowman Unit 1 Operations Manager Michael Lashley Test Engineering Supervisor Bill Humble NSSS Supervisor Wayne Harrison Licensing Engineer Ulhas Patil Design Engineer
/17/03 2
INTRODUCTORY REMARKS Mark McBurnett Manager, Quality & Licensing
/17/03 3
Agenda Introductory Remarks Mark McBurnett Summary Tom Jordan Root Cause Process and Monitoring / Inspection Plan Steve Thomas Return to Service Tim Bowman
/17/03 4
Desired Meeting Outcome NRC has sufficient information to complete their assessment
/17/03 5
SUMMARY
Tom Jordan Vice President, Engineering & Technical Services
/17/03 6
Evidence of Very Small Leakage Found in Routine Inspection
/17/03 7
BMI Guide Tube Penetration
/17/03 8
Extensive NDE Campaign Conducted
/17/03 9
Eddy Current J-Groove Probe
/17/03 10
eveloped Technology to Identify Wastage
/17/03 11
Comprehensive Examination Performed Using Industry Experts
- Enhanced visual exam of J-groove weld surface
- Volumetrically interrogate vessel base metal for wastage
- Metallurgical analyses of removed nozzle remnants
/17/03 12
Examination Results
- Three axial indications, one leak path
- Two axial indications, one leak path
/17/03 13
Permanent Half-Nozzle Repair Mechanical plug used during repairs (not shown)
Existing BMI nozzle Original structural weld Alloy 52 weld pad Alloy 52 J-Groove weld Alloy 690 replacement nozzle Original BMI NiCrFe socket weld Thimble Guide Tube
/17/03 14
Repair of Both Nozzles Complete
/17/03 15
Remaining Activities Boat sample analysis Sep 21 Nozzle remnants analysis Sep 21 LER supplement Oct 12
/17/03 16
Condition Limited to the Two Identified Nozzles
- Routine inspection identified very low leakage
- Axial cracks in tubes
- No wastage
- Substantial safety margin existed
- Monitoring / inspection plan developed
/17/03 17
ROOT CAUSE PROCESS and MONITORING / INSPECTION PLAN Steve Thomas Manager, Plant Design
/17/03 18
/17/03 19 Comprehensive NDE Narrows Consequences
- No circumferential cracks
- No cracks above or below J-groove weld
- UT examination
- Visual examination
- No iron in residue
- Very small deposits and leak rates
Conclusion:
Leakage is the only expected and observed consequence
/17/03 20
Two Possible Causes STP Unit 1 BMI Flaw Consequences Leak Investigation July 8, 2003 Results Axial Crack in Nozzle and/or Weld Crack Propagation PWSCC Low-Cycle Fatigue Nozzle and/or Weld Nozzle or Weld Crack Initiation Fabrication Flaw PWSCC Over-Stress Nozzle and/or Weld Nozzle and/or Weld
/17/03 21
Facts Inconsistent with PWSCC
- No cracks identified except in #1 and #46
- Cracks relatively old (3-5 yrs), about same age
/17/03 22
What Might be Expected Assuming PWSCC The industry has inspected 543 upper head CRDM nozzles and found 114 TW or partial TW defects.
Therefore, if PWSCC were the cause and STP inspected 58 nozzles, we would expect to find 12 nozzles with TW or partial TW defects.
/17/03 23
Facts Suggesting Fabrication Flaws
- Cracks not at highest residual stress locations
- Penetrations #1 and #46 are different in terms of residual stress
- Some cracks do not appear to be in contact with primary water
/17/03 24
Crack Propagation Scenario Tube wall J-groove Weld Crack Crack contacts grows at Crackinitiates to primary propagates the point to of tube/weld due water. leakage Growth interface thermalinto duecontinues annulus.
high by fatigue.
to fatigue or residual PWSCC.
stresses and
/17/03 thermal fatigue. 25
Boat Sample Objectives Nozzle 1
- Capture portion of leaking crack including part of nozzle wall, part of weld, and site of observed helium leakage Nozzle 46
- Capture portion of crack shown by UT not to connect with the surface
/17/03 26
Mock-up Penetration #46 Boat Sample
/17/03 27
Monitoring / Inspection Plan Confirms Effective Corrective Action
- Continue bare metal visual inspections under boric acid control program
- Perform periodic UT of vessel base material around repaired penetrations
- Perform volumetric examination of Unit 2 penetrations at next refueling outage with core barrel removal
/17/03 28
Condition Limited to the Two Identified Nozzles
- Routine inspection identified very low leakage
- Axial cracks in tubes
- No wastage
- Substantial safety margin existed
- Monitoring / inspection plan developed
/17/03 29
RETURN to SERVICE Tim Bowman Unit 1 Operations Manager
/17/03 30
Unit 1 is Ready to Return to Service
- Extent of condition known
- Probable causes identified
- Engineering work complete
/17/03 31
