ML25169A218
| ML25169A218 | |
| Person / Time | |
|---|---|
| Issue date: | 06/25/2025 |
| From: | Yamir Diaz-Castillo NRC/NRR/DRO/IQVB |
| To: | |
| References | |
| Download: ML25169A218 (12) | |
Text
1 33rd NUPIC Vendor Conference - June 25 - 26, 2025 - Austin, TX The Role of Appendix B to 10 CFR Part 50 in the NRCs Licensing Process & Pathways for Meeting Appendix B to 10 CFR Part 50 Yamir Diaz-Castillo Reactor Operations Engineer Quality Assurance & Vendor Inspection Branch Division of Reactor Oversight Office of Nuclear Reactor Regulation
Source of Quality
- Quality starts at the initial design.
- Designers determine the classification of components.
- Appropriate quality measures are then applied based on the classification of structures, systems, and components (SSCs.)
Without a standard there is no logical basis for making a decision or taking action.
-Dr. Joseph M. Juran
General Design Criteria (GDC) in Appendix A to 10 CFR Part 50
Principal Design Criteria (PDC) - Design Criteria for Non-Light-Water Reactors
- GDC are not applicable to non-light-water reactors.
- Regulatory Guide 1.232, Guidance for Developing Principal Design Criteria for Non-Light-Water reactors, provides design criteria.
- Table 1, Non-Light-Water-Reactor Crosswalk, provides guidance between the GDC and the PDC.
Guidance on the Classification of SSCs
Guidance on the Classification of SSCs
Classifications
Risk-Informed Safety Class (RISC)
Classifications
Graded Approach to Nuclear Quality Assurance
- Criterion II, Quality Assurance Program, states, in part:
- []This program shall be documented by written policies, procedures, or instructions and shall be carried out throughout plant life in accordance with those policies, procedures, or instructions.
- The applicant shall identify the structures, systems, and components to be covered by the quality assurance program and the major organizations participating in the program, together with the designated functions of these organizations.
- The quality assurance program shall provide control over activities affecting the quality of the identified structures, systems, and components, to an extent consistent with their importance to safety.[]
Guidance for Implementing Quality Assurance Programs
State and Jurisdiction Requirements
- States and jurisdictions have their own quality requirements for American Society of Mechanical Engineers code components.
- Applicants should be aware of these requirements based on the location of the reactor site.
- In some cases, the State and jurisdiction requirements may be more limiting than the Federal requirements.
12 Yamir Diaz-Castillo Reactor Operations Engineer 301-415-2228 Yamir.Diaz-Castillo@nrc.gov QUESTIONS?