Post-infarction Ventricular Septal Rupture and Free Wall Rupture
Extremely Low Probability of Rupture (xLPR) Project
Transcript of Extremely Low Probability of Rupture (xLPR) Project
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Extremely Low Probability of Rupture (xLPR) Project
Presentation to the External Review Board
xLPR External Review Board MeetingFebruary 20, 2013
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Organization & Funding
• Cooperative effort between NRC and EPRI through Memorandum of Understanding xLPR Addendum revision finalized early February
• xLPR team members provided by NRC & EPRI NRC or EPRI staff Separate contracts (exclusive - NRC or EPRI) for supporting
organizations No comingled funds – similar relative funding levels Leadership balanced (NRC / Industry) at all levels
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xLPR Organization Chart
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Cooperative effort between NRC and EPRI through Memorandum of Understanding
Code DevelopmentTeam Members
Code Development LeadsDavid Rudland – U.S. NRCCraig Harrington – EPRI
Models GroupMarjorie Erickson – PEAIRaj Iyengar– U.S. NRCMike Benson– U.S. NRCMark Kirk – U.S. NRCKyle Schmitt – Dominion EngineeringJohn Broussard– Dominion Engineering Glenn White– Dominion Engineering Do-Jun Shim – Emc2Elizabeth Kurth – Emc2Bud Brust – Emc2 Sean Yin – Oak Ridge National LaboratoryRichard Bass – Oak Ridge National LaboratoryCliff Lange – Structural Integrity AssociatesSteven Xu – KinetricsDoug Scarth – KinetricsRuss Cipolla – AptechMike Hill – UC DavisSteve Fyfitch – AREVA NP Inc.Rick Olson – BattelleAndrew Cox – BattelleLee Fredette – BattelleBruce Young – BattellePatrick Heasler – PNNL Mark Dennis - EPRIGeorge Connolly - EPRI
QA GroupNancy Kyle - TheseusHilda Klasky – Oak Ridge National Laboratory
Computational GroupPatrick Mattie – Sandia National LaboratoriesJesus Farias– EPRICedric Sallaberry – Sandia National LaboratoriesDon Kalinich – Sandia National LaboratoriesJon Helton – Sandia National LaboratoriesRemi Dingreville- Sandia National LaboratoriesRobert Kurth – Emc2Dilip Dedhia – Structural Integrity AssociatesDavid Harris– Structural Integrity AssociatesPaul Williams – Oak Ridge National Laboratory Scott Sanborn – PNNLIan Miller – GoldSimRyan Roper - GoldSim
Inputs GroupGuy DeBoo – ExelonGary Stevens – U.S. NRCAshok Nana – AREVA NP Inc.Nathan Palm – Westinghouse
Program Integration Board Denny Weakland - Ironwood ConsultingBruce Bishop – PEAIRob Tregoning – U.S. NRCBob Hardies – U.S. NRCTed Sullivan – PNNL
Program ManagerNate Leech - Demark
PEAI
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xLPR Version 2.0 Scope
• All typical welds in piping systems approved for LBB• Capabilities will address LBB requirements, but
must stay within available cost and schedule limitations
• Model inclusion in xLPR Version 2.0 does not guarantee regulatory approval. Process for obtaining approval of xLPR models is under discussion
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Version 2.0 Scope
• Framework Develop friendly user interface for inputs
Pre-processor to condition inputs
Implement advanced methodologies to improve sampling efficiency and solution accuracy
Robust uncertainty propagation methodology
Implement GoldSim modifications for additional user capability
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Version 2.0 Scope
• Inputs Update load definition to include transients
Develop a comprehensive list of required inputs and the parameter definition for each
To support code development and testing, retrieve all relevant data for one reactor coolant loop from a:
• Westinghouse PWR
• Babcock & Wilcox (B&W) PWR
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Version 2.0 Scope• Models
Revisit PWSCC initiation – Expert panel (just held)
Axial cracks
Environmental fatigue
Update Weld Residual Stress (WRS) model • More general, reduced uncertainty
• Piece-wise linear representation
Update K-solution to be consistent with updated WRS model• Universal weight function method
Mitigation to include FSWOL,OWOL, inlay/onlay, MSIP, and water chemistry
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Version 2.0 Scope• Models (continued)
Update inspection model – sizing, POD, simplified model
Update crack stability – Surface crack EPFM
Update leak rate model – Look-up tables, SQuIRT,
Update crack opening displacement (COD) tension and bending blended solution
Surface crack-to-through wall crack transition
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Version 2.0 QA / CM Scope
Quality Assurance Approach (xLPR-QAA) approved by NRC and EPRI as foundation for our QA implementation• xLPR QA Program governs all project activities and
deliverables• Team members will comply with the associated xLPR Project
Management Plan, Software Quality Assurance Plan, and Software Configuration Management Plan.
• Project scope is currently limited to the developmental phase (pre-release) of the product .
• QA approach will be periodically reviewed to ensure that it remains appropriate
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Program Document HierarchyProgram Basis Requirements
Software Project Management Plan
Software Quality Assurance Plan
Software ConfigurationManagement Plan
Work Plans
Releaseents Design Iation Test
DesignDesign
ementsRequirements
entationImplementation
TestTest
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QA Program Basis Requirements
• ASME NQA-1-2008 & NQA-1a-2009 Addenda, Quality Assurance Requirements for Nuclear Facility Applications
Part I Requirements 1, 2, 3, 4, 5, 6, 7, 11, 17, 18, Part II, Subpart 2.7
• Use of these selected requirements aligns with their parent requirements of 10 CFR50 Appendix B, Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants
• Determination of Non-Safety Augmented Quality Use of the xLPR deliverables in Nuclear Safety or Nuclear Quality
applications requires additional actions by the user pursuant to their internal procedures.
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QA Program Document Alignment
• Software Project Management Plan (SPMP) Provides the overall roadmap for project execution Incorporates applicable NQA-1 requirements not specific to
software, but necessary to manage the project• Organization. Training, Procurement, Document Control, Records
Management, Reviews and Audits
Contains pointers to all other project requirements documents
– SQAP, SCMP, DMPG, APVR
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• Software Quality Assurance Plan (SQAP) Specifies required quality assurance work activities for
development, procurement, maintenance, testing and configuration management of software.
Incorporates applicable NQA-1 requirements specific to developing software, including the phased activities of:
• Requirements, Design, Implementation, Testing, Release, Retirement
Points out global processes addressed in the SCMP:• Configuration Management, Problem Reporting and Corrective Action
QA Program Document Alignment
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• Software Configuration Management Plan (SCMP) Describes “HOW” we will implement the Configuration
Management Process across all project areas
• Includes implementation details for tool use
Incorporates the basic requirements for Configuration Management from NQA-1 Requirement 3 & Subpart 2.7
Includes the process for Problem Reporting and Corrective Action as xLPR is being developed.
QA Program Document Alignment
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• Work Plans Identify the goals, objectives, activities, and deliverables
for each Project Group or sub-group• Applying the project requirements to specific tasks
Includes resource loaded schedules (to the extent possible)
• Personnel
• Timelines
Address risks that could affect the schedule and how they are managed
QA Program Document Alignment
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QA Program Deliverables
• Follows IEEE Software Engineering Standards Basis for document templates
Adopts the IEEE Standards at a level appropriate for and applicable to the scope of the project
Promotes conformance to best industry practices
Ensures consistency of deliverables throughout the software life cycle
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QA Program Deliverable Control
• Subversion Repository Free/open source version control system (VCS) Manages files and directories, and changes made to them,
over time Archive and recover older versions of data or examine the
history of how data changed Allows network-based collaboration on documents and
keeps track of who made which changes Two-tiered structure segregates baseline “tags” from
working directories
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QA Program Reviews and Audits• Independent Program Review Performed to assess compliance with xLPR Quality
Assurance requirements, assess project progress, and identify areas for improvement
• September 17-21, 2012 (desk review of supplied documents)
• September 25-26, 2012 (on-site at ORNL)
Six observations (compliance with requirements) and Eight recommendations for improvement were identified
External Audit EPRI to assess compliance with the xLPR QA Program
• June 17-21, 2013 at ORNL, SNL, and SIA (San Jose)
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xLPR V2.0 Schedule