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June 12, 2014 NRC Vendor Workshop
Commercial-Grade
Dedication of Software
George Lipscomb Electrical Vendor Inspection Branch Division of Construction Inspection
& Operational Programs Office of New Reactors
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Agenda
• Design & analysis software – Regulatory framework – Quality programs – Requirements and guidance – Revision 1 of EPRI 1025243 – Software QA implementation
• Questions
Courtesy SCANA
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Target Audience
• Users of design and analysis software – Part 50 or 52 licensee / applicant – Nuclear vendors
• Topics for another presentation – Use of other types of software – Instrumentation & control software – Software development
Design and Analysis Software
• Finite element analysis • Piping analysis • Seismic analysis • Thermal and flow analysis • Nuclear physics • Electrical system analysis • Accident analysis
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Regulatory Framework
• Safety-related structures, systems, and components (SSC)
• Basic component • Commercial grade item (CGI) • Dedication (CGD)
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Software Quality Assurance
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Affect safety function
Design and analysis software
Make
No safety function affect
Buy
QA Controls
Internal controls: Quality & technical External controls:
PO, audits, witness 4 Methods-
Inspect/test, survey, witness, or historical
Commercial-grade Dedication
Safety-related
Computer Program Use
Software QA Programs
• Control under Appendix B program • Few software-specific QA regulations • Control flexibility
– separate software control procedures – program vs. project requirements
• Details in NQA-1 or IEEE standards
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Requirements
• Appendix B to Part 50 (QA) – Provisions of specific QA program
• Part 21 (reporting and dedication) • Part 50.5 (complete and accurate
information) • Plant licensing basis • Vendor purchase requirements
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Design Software Guidance
• Potentially required: – NQA-1 Requirement 3 - design controls – NQA-1 Subpart 2.7 - software controls – NQA-1 Subpart 2.14 - dedication – Various IEEE standards
• Additional: – NQA-1 Subpart 4.1 - software QA guide
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Dedication Guidance
• EPRI NP-5652 • ASME NQA-1-2008 with 2009 Addenda • Revision 1 of EPRI 1025243
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Courtesy SCANA
EPRI 1025243
• Acceptance of commercial design & analysis software – Rev 0 issued June 2012 – Rev 1 issued December 2013
• Draft Guide (DG)-1305 conditionally endorses Rev 1
• Public comment expected late 2014
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Methodology – 3 Scenarios
12 © Electric Power Research Institute
Methodology - CGD
13 © Electric Power Research Institute
Software Dedication Attributes
• Failure mechanisms – conceptual, arithmetic & interface errors
• Identification characteristics – product selection & identification
• Critical characteristics – physical, performance & dependability
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Software QA Implementation
• Leverage existing control processes • Focus of affect on safety function • Consider data, computer program and
operating environment • Configuration control • Error control and Defect reporting • Access control / data security • Documentation
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Considerations (NQA-1)
• Software acquisition (Subpart 2.7) • Configuration control (Subpart 2.7) • Problem reporting and corrective actions
(Subpart 2.7) • Design Analysis (Requirement 3)
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