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ASME STP/NU-067

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ASME STP/NU-067 2014 Edition, March 11, 2014 ROADMAP FOR THE DEVELOPMENT OF ASME CODE RULES FOR FUSION ENERGY DEVICES

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Description / Abstract: VISION STATEMENT AND OVERVIEW

The ASME Board on Nuclear Codes and Standards approved an effort to develop rules for the construction of fusion-energy-related components such as the vacuum vessel (vacuum or target chamber), cryostat and superconductor structures and their interaction with each other. These rules will be found in a new Division 4 of Section III entitled "Fusion Energy Devices". The rules shall contain requirements for materials, design, fabrication, testing, examination, inspection, certification, and stamping. The formation of the new Subgroup on Fusion Energy Devices will be responsible for the development of these rules and has begun to develop its membership and future working group support structures.

Current ASME BPVC Section III code rules do not specifically address the construction rules for fusion energy devices that are currently under consideration, nor do they support on-going projects, such as ITER (Tokamak Concept) and other fusion concepts such as Inertial Confinement Fusion (primarily laser fusion; an example is the National Ignition Facility).

While it may be feasible to modify the existing Section III rules to meet future fusion needs, it has been recommended that a complete separate set of rules be developed for these new fusion energy devices to cover design, construction and inspection/testing. In addition, it is anticipated that operation and maintenance requirements for these fusion energy devices may also require a new set of rules or major modifications to the existing ASME Operations and Maintenance (OM) Code. It is necessary that these new rules contain the best available methods and technology in each area.

As such, this Roadmap for the Development of ASME Code Rules for Fusion Energy Devices (FED Roadmap) was developed to outline what should be considered when developing these rules. The approach in this FED Roadmap consists of a compilation of suggestions from subject matter experts and organizations interviewed, as well as that of the author. As the project teams, task groups, and committees deliberate, it is anticipated that some of the tasks identified in this FED Roadmap will be revised or eliminated from consideration and others will be added.

The Fusion Energy Device Code rules will be developed by various project teams within the Subgroup Fusion Energy Devices of the BPV Committee on Construction of Nuclear Facility Components (III) and will be coordinated with other impacted groups both inside and outside ASME. A Stakeholder Task Group reporting to the Chairman of the BPV Committee on Construction of Nuclear Facility Components (III) and the Chairman of the Subgroup Fusion Energy Devices has been formed to identify stakeholders and their needs, and develop recommendations and approaches to be incorporated into new FED Code rules.