ML23324A270

Session - Key Takeaways

ML23324A270
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Issue date:	10/24/2023
From:	Bayssie M, Eric Focht, Amy Hull, Robert Tregoning, Austin Young NRC/RES/DE
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Eric Focht 301-415-2094
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KEY TAKEAWAYS/THEMES

2023 NRC Workshop On Advanced Manufacturing Technologies For Nuclear Applications

October 24-26, 2023 Rockville, MD

R. Tregoning, E. Focht, A. Hull, A. Young, and M. Bayssie U.S. NRC Office of Nuclear Regulatory Research Division of Engineering The views expressed by the authors do not necessarily reflect those of the Nuclear Regulatory Commission SESSION 1: IMPLEMENTATION

• Several sectors are implementing AMT components to meet the needs of their stakeholders/customers which satisfies a business case

• Improve parts availability readiness

• Broaden supply chain

• Manage component obsolescence

• Optimize cost and performance

• Initial applications have been low risk to gather manufacturing and operating experience

• Safety-significant applications are proceeding cautiously

• Important for designers to be proactive and intimately involved with fabrication process, especially as safety-significance increases

• Significant opportunities exist for supporting both existing and future platforms SESSION 2 - QUALIFICATION

• Multiple qualification pathways

• Traditional testing based

• Traditional coupled with better process controls and monitoring

• Accelerated, with modeling and simulation (M&S) support (ICME)

• Initial qualification and certification (Q&C) is largely following traditional path used for conventional materials for adoption with Codes (e.g., ASME),

testing)material property databases (e.g., MMPDS) and applications (e.g., 1st article

• M&S provides opportunity to both identify critical tests for optimizing/demonstrating AM systems while simultaneously accelerating Q&C

• Building trust in M&S approaches is needed to fully realize their benefits

• There may be opportunities to leverage Q&C efforts developed (or being developed) within other industries.

SESSION 3 - PERFORMANCE

• Many studies are focusing on understanding and optimizing as-built performance to maximum AM value

• Anisotropy considerations are a stronger consideration within this approach

• Build variability needs to be addressed at the outset and identifying critical process variables is essential to assessing differences among machines and operators

• Relevant performance metrics can be equivalent or better than conventional wrought materials

• Important to understand and address causal factors for differences

• M&S provides a needed tool to most efficiently understanding environmental effects SESSION 4 - CODES & STANDARDS

• Many standards already exist which support AM Qualification

• Powder quality and handling

• Heat treatment

• Testing and characterization

• Post-fabrication inspection

• Augmented or new standards needed to provide overall quality assurance

• Identification and control of essential process variables

• Implementation of in-process monitoring

• Incentivize knowledge and data sharing among practitioners

• Codification processes are incorporating AM but processes are lengthy by design and due to uncertainties

• Integrated design, surveillance, and inspection strategies, coupled with targeted key testing can be used to more quickly implement AM systems