ML18109A540
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| ML18109A540 | |
| Person / Time | |
|---|---|
| Issue date: | 04/05/2018 |
| From: | William Reckley NRC/NRO/DSRA/ARPB |
| To: | |
| Reckley W | |
| Shared Package | |
| ML18109A084 | List: |
| References | |
| Download: ML18109A540 (12) | |
Text
Advanced Reactor Guidance Documents April 5 & 6, 2018 Bridge Number Pass Code (888) 793-9929 87972 1
Discussion Topics
- Any limitations on scope in terms on non-LWR designs, technologies, or sizes (micro through large) ?
- NRC to provide feedback following meeting to support next revision / meeting 2
Guidance Scope / Context (content & level of detail)
- General Description of the Plant
- Site Characteristics
- Design of SSCs and Equipment
- Reactor Primary
- Reactor Coolant and Connecting Systems Systems
- Engineered Safety Features
- Instrumentation and Controls
- Electric Power
- Auxiliary Systems
- Steam and Power Conversion System
- Radioactive Waste Management
- Radiation Protection
- Conduct of Operations
- Verification Programs
- Transient and Accident Analyses
- Technical Specifications Analyses
- Quality Assurance and Reliability Assurance (LMP)
- Human Factors Engineering
- Probabilistic Risk Assessment/Severe Accident Evaluation LMP
- Defense in Depth
- Emergency Planning
- Security
- Staffing
- Fire Protection
- Mitigating Strategies
- Aircraft Impact Assessment Support &
- Environmental Report Secondary
- Financial Systems
- Inspections, Tests, Analyses, and Acceptance Criteria
- Insurance
- Other (design or technology specific) 3
Advanced Reactor Program Assessment:
15, 19, 21 DID: 20 LMP focus PRA: 19 Deterministic: 15 Key: 4, 5, 6 Programs:
12, 13, 14, 16, 17, 18 Support: 7, 8, 9 Site / Design: 2, 3 Misc 10 Other: 11 Feb/March 2017 stakeholder meetings 4
Integrating Activities Nov/Dec 2017 stakeholder meetings 5
Discussion Topics
- Regulatory foundations/precedents (p7)
- Event category frequency and dose ranges (p8 - 11)
- Staff needs to accept or propose revisions
- Plant, multi-module, fleet (p9)
- External events (p14) - needs additional discussion, clarity related to establishing design basis external hazards, deterministic and PRA treatments Note - blue text indicates LMP discussion topic within Draft H of guidance document (ML18094B085).
6
Discussion Topics
- LBE against F-C target (p 13-14) - barrier integrity approach as possible means to meeting F-C target and then throughout in terms of performance metric. Possible for some designs to adopt maximum hypothetical accident approach similar to analyses for research & test reactors
- Role of PRA in LBE selection - consider other aspects of PRA within licensing basis - through plant design and operation (not necessarily address here but lay potential groundwork)
- Safety functions; required/supportive (p 23) - example of building a logic to determine scope and depth of content of other parts of SAR (e.g., system descriptions); see also discussions page 39 on design and performance requirements (see also § 4)
- PRA technical adequacy (p29) 7
Discussion Topics
- Content needed regarding comparison/contrast to 10CFR50.69 and related processes (p 37)
- Barrier design requirements equivalent to or at least consistent with functional containment performance criteria ?
- Safety margins (p 43) - include engineering, reliability, and F-C targets (terminology vs existing use, usually related to engineering) 8
Discussion Topics
- Table 4-1 (p 45) - good summary but need some time to evaluate
- Adequacy of Defense in Depth (p 62) - Layer 4 does not necessarily require severe accident design features
- Accident sequence framework (p 66) similar to current activity NRC sponsoring at SNL (compare insights)
- Cliff edge (p 67) - do we need to describe in terms of loss of function when a hazard exceeds certain threshold
- Programmatic DID ( p 70) - good summary but need some time to evaluate 9
Discussion Topics Supporting Discussion of criteria for classification as safety related 10
Format Supporting Discussion of safety focused reviews Feb/March 2017 stakeholder meetings 11
Discussion 12