Fusion RAMI Evolution: A Low TRL RAMI Process for Fusion Energy R&D

1. Fusion RAMI Evolution, part 1 of 2:A Low TRL RAMI Process for Fusion Energy Research and Development Tom Weaver Counter CBRNE DEW Platform Systems Technology Boeing Research and Technology I-Li Lu, Ph.D. Applied Statistics Platform Performance Technology Boeing Research and Technology ARIES 2011 Quarter #2 Review 27-28 July, 2011; Gaithersburg, Maryland

2. Fusion RAMI Strategy Tailor aerospace/nuclear industrial RM&SH process to fusion Enlisted aid of relevant support groups • I-Li Lu: • Applied Mathematics and Statistics • Knowledge Capture • Boeing Research and Technology • James Robinson: • Reliability, Maintainability, and Testability • Boeing Commercial Aircraft

3. Presentation Agenda • Two parts • 1) Administration, Background, and Theory • 2) Fusion application of the process • Key Concepts • RAMI model→test→model cycle shown effective in aerospace • Develop a fusion plant RAMI estimating tool including available data and physics models for missing data • Use tool results to advise experiment plans to increase benefits and reduce risks • Repeat cycle with more detailed tool and more informative tests

4. Part 1 Administration and Process Background and Theory

5. Responsible Entity Input Provided RAMI Process Output SoW and Spec Rqmts Customer and Regulator SoW and Spec Rqmts Program Manager Define RAMI Program Prime Contractor Standards “Command Media” Provide RAMI in the Product Collect & Provide Experience Data Data, Methods, Tools, Expertise, Processes RAMI Engineering CAE/CAD/CAM Systems Assess RAMI In Design And Production Requirements Requirements and Data Logistics Candidate Logistics Support Analyses RAMI “Design” Design Engineering HW & SW Rqmts Requirements Incorporation of RAMI in Design Systems and Safety Engineering Design Data Suppliers RAMI Data June – Sept 2011 Activity

6. Responsible Entity Input Provided RAMI Process Output SoW and Spec Rqmts Customer and Regulator SoW and Spec Rqmts Program Manager Define RAMI Program Prime Contractor Standards “Command Media” Provide RAMI in the Product Collect & Provide Experience Data Data, Methods, Tools, Expertise, Processes RAMI Engineering CAE/CAD/CAM Systems Assess RAMI In Design And Production Requirements Requirements and Data Logistics Candidate Logistics Support Analyses RAMI “Design” Design Engineering HW & SW Rqmts Requirements Incorporation of RAMI in Design Systems and Safety Engineering Design Data Suppliers RAMI Data Oct – Dec 2011 Activity

7. Critical Fusion R&D Issue • Chicken-and-Egg Problem • Need more data • Need facilities to get data • Need to know what to build with scarce funds • Need more data • ICF found a defense escape route • Industrial RAMI may show way out for MCF • Data Mining • Engineering-guided Experiment Planning with RAMI as prototype

8. Critical Fusion RAMI Issue • Not unique in attempting RAMI estimation and enhancement across a major technological leap; however, • The gap the technological leap fusion is to cross is unusually large. • Aerospace and military engineering addressing the issue

9. Introduction to RCM Reliability-Centered Maintenance (RCM) An analytical process used to determine appropriate failure management strategies to ensure safe and cost-effective operations of a physical asset in a specific operating environment. • Goal of RCM • Avoid or reduce failure CONSEQUENCES • Not necessarily avoid failures (failure prevention remains an important part of the process, it is just recognized as never 100% possible) • Failure Consequences are the effects of failure on: • Personal and Equipment Safety • Environmental Health/Compliance • Operations • Economics

10. RCM Definition • SAE JA1011 “Evaluation Criteria for RCM Processes” defines seven questions for RCM: • What are the functions…of the asset…(functions)? • In what ways can it fail…(functional failures)? • What causes each functional failure (failure modes)? • What happens when each failure occurs (failure effects)? • In what way does each failure matter (failure consequences)? • What should be done…(proactive tasks and intervals)? • What should be done if a suitable proactive task cannot be found?

11. RCM History • Early PM Programs based on concept that periodic overhauls ensured reliability and, therefore, safety Overhaul: Tearing down and rebuilding components • By the 1960s: • Introduction of 747, DC-10, L-1011 led airlines to conclusion that current preventive maintenance philosophies were unsustainable • FAA and Commercial Aviation Industry formed a group to study preventive maintenance • FAA/Airline Group conclusion: overhauls had little or no effect on overall reliability or safety in many cases • Why?

12. Overhaul interval Conditional Probability of Failure Time Assumptions Needed Challenging What the airlines and manufacturers discovered. • Statistical analysis showed, in most cases, no change in safety or reliability when overhaul limits changed. • Initial overhaul limits were not analytically based. • High repair costs for little or no benefits. Facts about overhauls • Many failure modes do not support overhaul philosophy- have no ‘right’ overhaul time. • Lose considerable component life. • Overhauls re-introduce infant mortality failures. Led to the creation of the “Maintenance Steering Group”

13. Fraction of parts in Civil Aircraft Clearly defined wear out zone Opportunity for Condition Based Maintenance Wear out zone Infant Mortality 4% 2% 5% 7% 14% 68% “Bathtub” curve Condition monitoring is only effective on a small fraction of parts Wear out zone Continuous degradation Continuous degradation, but no defined wear out zone or age Low chance of early failure to a constant probability of failure Constant probability of failure (random failure) High Infant Mortality dropping to constant or slowly increasing probability of failure Found 6 Patterns of Failure Modes of part failures must be characterized Condition-Based Maintenance becomes an element of the new approach

14. Maintenance Generations • 1960s maintenance mostly still used a first generation “fix it when it breaks” philosophy • Philosophy needed changing in order to achieve greater expectations • Improved availability, reliability, safety, cost effectiveness, etc. This is an excerpt of the first chapter of the book "Reliability-centered Maintenance" by John Moubray.

15. New Techniques Example ICBM maintenance was improved by a relook at equipment monitoring, analysis and design

16. The Solution Boeing engineers and statisticians have developed a Decision Support System that is Data-Driven, Knowledge-Guided, and Statistical-Based, with analysis that will provideCost and Risk Optimized solutions. Key Factors: • The need surfaced in Maintenance Steering Group (MSG) international oversight body. • All major regulatory agencies and OEMs participate. • Boeing guided the development of the Issue Paper for Scheduled Maintenance • FAA has approved the Issue Paper and tool • Centralized Task Force with multi-disciplinary approach : Subject Matter Experts from Engineering, Information Technology, Statistics, Operations Research, Data/Text Mining, and Economics. Remark: what distinguishes Boeing approach • Novel measures for degradation using Latent and Evident Lifetimes • Bottom-Up approach for task and system reliability • Advanced statistical reliability methods developed by thinking outside the box • Centralized software development and technology integration

17. Next Step Part 2, Fusion Application of the Process will be after a break