Reliability and safety analysis for systems of fusion device

Alzbutas, Robertas; Voronov, Roman

doi:10.1016/j.fusengdes.2015.03.001

Cited by 8 publications

(2 citation statements)

References 14 publications

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“…In order to perform safety analyses of a fusion reactor, the methodology described by Alzbutas and Voronov 13 and sketched in Fig. 1 can be adopted: 1.…”

Section: Methodsmentioning

confidence: 99%

“…Among the events listed in Tables II and III, the PIEs of accidents occurring in the TF magnets are identified as those leading to the most severe consequences; here, only the consequences are considered for determination of the PIEs even though risk should be used to define PIEs. This is done because risk is the product between the consequence caused by the failure and the probability of the failure, 13 but the latter is not defined due to the lack of details on the components at this design stage.…”

Section: Iiic Postulated Initiating Eventsmentioning

confidence: 99%

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Identification of the Postulated Initiating Events of Accidents Occurring in a Toroidal Field Magnet of the EU DEMO

Bonifetto

Pedroni

Savoldi

et al. 2019

Fusion Science and Technology

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The design of the European Union (EU) DEMO reactor magnet system, currently ongoing within the EUROfusion consortium, will take advantage of the know-how developed during the design and manufacturing of ITER magnets; however, DEMO will suffer some new, more severe challenges, e.g., larger tritium inventory and higher neutron fluence, both having an impact on safety functions accomplished, among the other systems, also by the magnets. For these reasons, and in view of the need to demonstrate a high availability of the reactor (aimed at electricity production), a new, more systematic assessment of the system safety is required. As a contribution in this direction, the initiating events (IEs) of the most critical accident sequences in the EU DEMO magnet system (with special reference to the toroidal field magnets) are identified here, adopting first a functional analysis and then a failure mode, effects, and criticality analysis. In particular, the following are provided: (1) the EU DEMO magnet system is subdivided into functionally independent subsystems and components (e.g., the magnets, their cooling circuits, and their power supply system); (2) the relevant failure modes of each subsystem are systematically identified, together with the corresponding causes and consequences; (3) a list of IEs is compiled, leading to scenarios that may compromise the magnet safety and availability. Finally, the so-called postulated IEs are selected as the most challenging IEs for the safety of the magnet system. This analysis initializes a path leading to a risk-informed design, i.e., the identification of safety issues that could be addressed at the design level instead of introducing expensive mitigation measures after the design completion.

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“…In order to perform safety analyses of a fusion reactor, the methodology described by Alzbutas and Voronov 13 and sketched in Fig. 1 can be adopted: 1.…”

Section: Methodsmentioning

confidence: 99%

Section: Iiic Postulated Initiating Eventsmentioning

confidence: 99%