Fusion—Safety and Environmental Considerations

Taylor, Neill

doi:10.1016/b978-0-12-819725-7.00045-3

Cited by 1 publication

(2 citation statements)

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“…The following facility in the Chinese roadmap to realize sustainable-clean fusion energy is the China Fusion Engineering Test Reactor (CFETR), aiming to bridge the gaps between the International Thermonuclear Experimental Reactor (ITER) and the demonstration reactor (DEMO) [1]. CFETR has large amounts of tritium inventories, and the potential of accidents resulting in tritium environmental impact necessitates conducting safety analyses studies during the CFETR design phase to ensure that the design has a sufficiently low risk of released tritium into the environment and that these are optimized to minimize potential operational risks and environmental impact [2]. In addition, the safety analyses could form a part of the licensing process for future CFETR construction and operation.…”

Section: Introductionmentioning

confidence: 99%

“…DBAs can be determined from postulated initiating events (PIEs) typically identified through systematic approaches such as the top-down (Master Logic Diagrams) MLDs [3] and the down-top (Failure Mode and Effects Analysis) FMEA [4]. Methods for accidents analysis include deterministic accident analysis (DAA) and probabilistic risk assessment (PRA) [2]. DAA performs computer modeling of the systems involved in the plant response to PIEs through neutron transport models, activation models, thermal-hydraulic models, and aerosol models to assess whether the most severe consequences of PIEs (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Probabilistic risk assessment model for released tritium into the environment for CFETR

Liang

Xu²,

Peng³

2022

Nucl. Fusion

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The China Fusion Engineering Test Reactor (CFETR) is the next facility in the Chinese roadmap to realize sustainable-clean fusion energy. Because of the large tritium inventory of the CFETR, safety analyses are necessary. During the current design phase of the CFETR, performing the risk analysis of tritium released into the environment could reveal the design weaknesses and indicate improvements aimed at tritium risk reduction but also form a part of the licensing process for future CFETR construction and operation. Several CFETR safety analyses using deterministic approaches have been conducted, but relatively few studies based on probabilistic approaches are currently available. In this paper, a probabilistic risk assessment (PRA) model for tritium release into the environment for CFETR was proposed, in which the frequency and the radioactivity of the released tritium in accident sequences are considered. The event tree/fault tree (ET/FT) method was applied to investigate primary factors contributing to the tritium release into the environment and to estimate the frequency of accident sequences. We presented a model for preliminary and rapid assessment of the radioactivity of released tritium in accident sequences and developed a calculation code. The application process and validity of the model were demonstrated through the assessment of tritium risk of the CFETR for selected postulated initiating events.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%