2/7/2013 vg 1

Extremely Low Probability of Rupture (xLPR) Project

Presentation to the External Review Board

xLPR External Review Board MeetingFebruary 20, 2013

2/7/2013 vg 2

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

2/7/2013 vg 3

xLPR Organization Chart

2/7/2013 vg 4

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

2/7/2013 vg 5

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

2/7/2013 vg 6

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

2/7/2013 vg 7

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

2/7/2013 vg 8

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

2/7/2013 vg 9

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

2/7/2013 vg 10

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

2/7/2013 vg 11

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

2/7/2013 vg 12

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.

2/7/2013 vg 13

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

2/7/2013 vg 14

• 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

2/7/2013 vg 15

• 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

2/7/2013 vg 16

• 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

2/7/2013 vg 17

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

2/7/2013 vg 18

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

2/7/2013 vg 19

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)

2/7/2013 vg 20

xLPR V2.0 Schedule