Letter Sequence Meeting |
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Administration
- Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting
Results
Other: ML120540570, ML120540610, ML120540667, ML120540727, ML120540816, ML120610068, ML120610074, ML120610102, ML12145A438, ML12145A466, ML12243A474, ML12335A174, ML12335A177
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MONTHYEARML1200901012012-01-10010 January 2012
Notice of Forthcoming Public Meeting Via Conference Call with South Texas Project Nuclear Operating Company
Project stage: Meeting
ML1204400602012-01-26026 January 2012
Summary of January 12, 2012 Chemical Effects Meeting
Project stage: Request
ML1203003642012-02-0202 February 2012
3/8/12 Forthcoming Meeting by Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, U
Project stage: Meeting
ML1203400432012-02-0303 February 2012
Notice of Forthcoming Meeting Via Conference Call with STP Nuclear Operating Company
Project stage: Meeting
ML1204400612012-02-0808 February 2012
Email Licensee Slides for 2/9/12 Public Meeting Via Conference Call
Project stage: Meeting
ML1204400652012-02-0909 February 2012
Licensee Slides for 2/9/12 Meeting Regarding GSI-191
Project stage: Meeting
ML1205407272012-02-0909 February 2012
Actions Taken to Resolved PIRT Items
Project stage: Other
ML1205406942012-02-22022 February 2012
Email Additional Meeting Materials for the 3/01/12 Meeting to Discuss GSI- 191
Project stage: Meeting
ML1205406672012-02-22022 February 2012
Casa Grande Summary
Project stage: Other
ML1205406102012-02-22022 February 2012
Email Casa Grande Summary
Project stage: Other
ML1205405572012-02-22022 February 2012
Licensee Slides for 03/1/12 Meeting with STP Nuclear Operating Company Meeting to Discuss GSI-191
Project stage: Meeting
ML1205405092012-02-22022 February 2012
Email Meeting Materials for March 1, 2012 Conference Call
Project stage: Meeting
ML1205407582012-02-22022 February 2012
STP Summary of January Meeting
Project stage: Meeting
ML1205406042012-02-22022 February 2012
Meeting Materials for 3/1/12 Conference Call
Project stage: Meeting
ML1205405702012-02-22022 February 2012
Uncertainty Modeling of LOCA Frequencies and Break Size Distributions for the STP GSI-191 Resolution
Project stage: Other
ML1205407842012-02-23023 February 2012
Email Documents Transmitted for March 1, 2012 Meeting
Project stage: Meeting
ML1205408162012-02-23023 February 2012
Experimental Setup for Chle Test Equipment
Project stage: Other
ML1206100682012-02-28028 February 2012
Southtexas Project, Units 1 and 2 - Test Plan for STP High Temperature Vertical Loops Testing
Project stage: Other
ML1206100742012-02-29029 February 2012
Corrosion Head Loss Experiments Test Program
Project stage: Other
ML1206100632012-02-29029 February 2012
Intro for March 8, 2012 Public Meeting to Discuss GSI-191
Project stage: Meeting
ML1206101022012-02-29029 February 2012
Proposed STP Strainer Fiber Bypass Test Protocol
Project stage: Other
ML1206205412012-03-0606 March 2012
2/9/12 Summary of Meeting by Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Un
Project stage: Meeting
ML1207400312012-03-15015 March 2012
3/29/12 Notice of Meeting Viaconference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for Units 1 and 2
Project stage: Meeting
ML1208300862012-03-29029 March 2012
Summary of Meeting by Conference Call with STP Nuclear Operating Co. to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 & 2
Project stage: Meeting
ML1208301032012-03-30030 March 2012
3/1/12 Summary of Meeting by Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Un
Project stage: Meeting
ML1210800062012-05-0404 May 2012
Staff Comments and Questions Related to Review of STP Nuclear Operating Companys Report Entitled, Risk-Informed Resolution of GSI-191 at South Texas Project, Discussed at Public Meeting on 3/1/12 (TAC ME7735-36)
Project stage: Meeting
ML12145A4382012-05-18018 May 2012
Licensee Handout on Calibration and Benchmarking of Single and Two-Phase Jet Cfd Models
Project stage: Other
ML12145A3122012-05-18018 May 2012
E-mail Documents for Public Meeting on LOCA Frequency and Jet Formation
Project stage: Meeting
ML12145A4662012-05-18018 May 2012
Loca-Hybrid-Final
Project stage: Other
ML12146A0202012-05-31031 May 2012
Notice of 6/11/12 Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Unit
Project stage: Meeting
ML1213805222012-05-31031 May 2012
3/29/12 Summary of Conference Call Meeting with STP Nuclear Operating Company, Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units
Project stage: Meeting
ML12187A0812012-07-11011 July 2012
Summary of 6/11/12 Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Uni
Project stage: Meeting
ML12234A6042012-08-21021 August 2012
Email - Documents for NRC Public Meeting on Corrosion Head Loss Experiments (Chle) Part 1 and 2
Project stage: Meeting
ML12227A5902012-08-23023 August 2012
9/6/2012 Notice of Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Uni
Project stage: Meeting
ML12243A4742012-08-30030 August 2012
Email - Risk-Informed Approach to GSI-191, STP Cfd Data Analysis Report - Bypass Test Protocol
Project stage: Other
ML12261A3012012-09-21021 September 2012
Notice of Forthcoming Public Meeting Via Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach
Project stage: Meeting
ML12270A0552012-10-0404 October 2012
9/6/2012 Summary of Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Un
Project stage: Meeting
ML12300A2972012-11-0808 November 2012
Summary of Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 and
Project stage: Meeting
ML12321A1222012-11-20020 November 2012
12/3/12 Notice of Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Unit
Project stage: Meeting
ML12335A1842012-11-26026 November 2012
Licensee Documents for December 12, 2012 Public Meeting
Project stage: Meeting
ML12335A1772012-11-26026 November 2012
- Licensee Documents ALION-CAL-STP for 12-10-12 Public Telecon GSI-191
Project stage: Other
ML12335A1902012-11-26026 November 2012
Licensee Documents for December 12, 2012 Public Meeting
Project stage: Meeting
ML12335A1742012-11-26026 November 2012
Email Licensee Documents for 12-10-12 Public Telecon GSI-191
Project stage: Other
ML12340A1352012-11-27027 November 2012
Meeting Notice by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution South Texas Project, Units 1 and 2
Project stage: Meeting
ML12331A2922012-11-27027 November 2012
Notice of Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 and
Project stage: Meeting
ML12341A1702012-12-20020 December 2012
12/3/12 Summary of Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Uni
Project stage: Meeting
ML13004A4012013-01-31031 January 2013
Summary of Meeting by Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 &
Project stage: Meeting
2012-02-08
[Table View] |
Text
STP Risk STP Risk--Informed Approach to Informed Approach to NRC G i S f t I 191 NRC G i S f t I 191 NRC Generic Safety Issue 191 NRC Generic Safety Issue 191 (GSI (GSI-191) 191)
(
)
Zahra Mohaghegh Ph D Ernie Kee Zahra Mohaghegh, Ph.D.
Soteria Consultants Boston, MA www.soteriaconsultants.com mohaghegh@soteriaconsultants.com Ernie Kee South Texas Nuclear Operating Company Wadsworth, TX www.stpnoc.com keeej@stpegs.com Introductory Presentation at at NRC Public Meeting February 9, 2012
Participating Teams from Participating Teams from STP Ri k STP Ri k I f d P j
I f d P j
STP Risk STP Risk-Informed Project Informed Project on Feb 9, 2012 Public Meeting:
on Feb 9, 2012 Public Meeting:
g g
1.
Containment Accident Stochastic Analysis (CASA )Team 2.
Corrosion/Head Loss Experimental (CHLE) Team 3.
GSI-191 Analysis & Methodology Implementation (GAMI) Team 4.
Oversight Team 5
STPNOC Team 5.
STPNOC Team 2
Containment Accident Stochastic Analysis Containment Accident Stochastic Analysis (CASA) T (CASA) T (CASA) Team (CASA) Team Bruce Letellier, Ph.D. in Nuclear Eng.
Nuclear Reactor Safety and Risk Analysis at Los Alamos National Lab Nuclear Reactor Safety and Risk Analysis at Los Alamos National Lab CASA lead for STP Risk-informed GSI-191 project 10 years of experience in GSI-191 3
Corrosion/Head Loss Experimental (CHLE)
Corrosion/Head Loss Experimental (CHLE)
T T
K H
Team Team Kerry Howe, PE, Ph.D., BCEE.
Associate Professor in the Civil Eng. Department at the University of New Mexico CHLE lead for STP Risk-informed GSI-191 project 5 years of experience in GSI-191 Janet Leavitt, Ph.D. in Environmental Eng.
Post-doc in the Civil Eng. Department at the University of New Mexico CHLE team member for STP Risk informed GSI 191 CHLE team member for STP Risk-informed GSI-191 5 years of experience in GSI-191 4
GSI GSI--191 Analysis & Methodology 191 Analysis & Methodology Implementation (GAMI) Team Implementation (GAMI) Team Ti S d
Implementation (GAMI) Team Implementation (GAMI) Team Tim Sande, M.S. in Petroleum Eng.
Engineering Supervisor at Alion Science & Technology GAMI lead for STP Risk-informed GSI-191 project 8 years of experience in GSI-191 Gil Zigler Nuclear Eng Gil Zigler, Nuclear Eng.
Senior Scientist/Engineer at Alion Science & Technology GAMI team member for STP Risk-informed GSI-191 20 f
GSI 191 20 years of experience in GSI-191 5
Oversight Team Oversight Team Z h M h h
h g
Zahra Mohaghegh, Ph.D. in Reliability Eng.
Principal Research Scientist at Soteria Consultants Oversight lead for STP Risk-informed GSI-191 project 8 years of experience in Probabilistic Risk Assessment (PRA)
Seyed Reihani, Ph.D. in Mechanical Eng.
Research Scientist at Soteria Consultants Oversight team member for STP Risk-informed GSI-191 project Oversight team member for STP Risk informed GSI 191 project 10 years of experience in catalytic combustion 6
STPNOC Team STPNOC Team Steve Blossom, Project Manager Project Manager at the South Texas Project Nuclear Operating Company Project Manager for STP Risk-informed GSI-191 project 32 years of experience in Project Management Ernie Kee, Mechanical Eng.
Supervisor, Risk-Informed Applications, at the South Texas Project Nuclear Operating Company STP Technical Leader for STP Risk-informed GSI-191 project 14 years of experience in Probabilistic Risk Assessment (PRA) at a commercial nuclear power plant 7
Main Goals of the Risk Main Goals of the Risk-Informed Project Informed Project 1.
Through a risk-informed approach, establish a technical basis to i NRC l t l th f t i l t d t j
gain NRC approval to close the safety issues related to GSI-191 by the end of 2013 2.
Exemption from certain requirements of 10 CRF 50.46 if the risk associated with the fibrous insulation in STPNOCs containment is determined as non risk significant :
3/4 Decision-making is based on the difference in risk between a perfect design and the existing design 3/4 Safety issues having CDF < 10-6/yr and LERF < 10-7/yr fall in Risk Region III (very small changes) as defined by Regulatory Guide 1.174 8
S h ti R t ti S h ti R t ti Schematic Representation Schematic Representation of the Integrated Model, of the Integrated Model, Developed for the Developed for the Risk Risk--Informed GSI Informed GSI--191 191 Project Project 9
3/4 PRA is located at the top level of system analysis.
3/4 This PRA has the typical Power yp Plant Fault Trees and Event Trees covering hardware failures and operators actions and so, has the typical PRA cut sets.
10
3/4 CASA Grande provides estimates for the likelihood of three basic events of Fault Trees in PRAs.
3/4 Rather than relying solely on historical failure data for these three basic events, the risk-informed project develops the models (in CASA Grande) for the underlying chemical and h
i l h l
di mechanical phenomena leading to the three basic events.
11
3/4 The output of CASA Grande will give a more accurate estimate of the likelihood of these three basic events and can then be imported to events and can then be imported to Fault Trees of the plant-specific PRA in order to calculate CDF.
3/4 CASA Grande is instrumental in opening the black boxes of two important events in the scenarios of P
Pl t PRA (i i
l ti a Power Plant PRA (i.e. recirculation and core blockage) by model-based estimations of the likelihood of their underlying basic events.
y g 12
3/4 The Risk-Informed GSI-191 project not only contributes toward the closure of the GSI-191 issues, but also makes a contribution toward also makes a contribution toward PRA research and applications.
3/4 This project improves the scientific incorporation of underlying physical failure mechanisms ( i.e. chemical and mechanical phenomena) into PRA, an important topic of interest in the PRA field.
13
Focus of Todays Meeting:
Focus of Todays Meeting:
Chemical Effects Chemical Effects 3/4 Chemicals are hypothesized to yp affect both the strainer debris bed head loss and the in-vessel debris bed head loss.
3/4 In the figure, the effect on the in-vessel debris bed head loss is shown as going through the strainer bypass path.
3/4 Boron precipitation is separate from the chemical reaction processes and their potential p
p debris bed blockage.
14
Todays Agenda Todays Agenda Today s Agenda Today s Agenda 1.
As necessary, discuss STP Post-meeting Notes from January y,
g J
y 26-27 Chemical Effects Meeting 2
Methods for addressing each of the significant PIRT issues 2.
Methods for addressing each of the significant PIRT issues 3.
Experimental apparatus configuration p
pp g
4.
High level alignment on strainer head loss methodology (use of NUREG/CR 6224 and CHLE experiments)
(use of NUREG/CR 6224 and CHLE experiments) 15
Plan for Plan for Risk Risk--Informed Informed Chemical Effects Testing Chemical Effects Testing Existing KnowledgeBase on Chemical 30DayIntegrated ChemicalEffectsTests withDirectHeadLoss Measurement PrecipitateCalculator (Type Quantity and onChemical Effects Benchtop Testing (Type,Quantity,and Form)
Thermodynamic Modeling Short Term Integrated Benchtop Testing NUREG/CR6224Head CASAGrande ShortTermIntegrated ChemicalEffectsTests withDirectHeadLoss Measurement
/
LossCorrelation HeadLossCalculator (StrainerHeadLossdue toFiber,Particulate,and Precipitates)
PlantSpecific Vertical PlantSpecificVertical LoopandTankTests 16
