An aerosol resuspension model for MELCOR for fusion

Merrill, B.J.; Humrickhouse, Paul W.; Sharpe, J. P.

doi:10.1016/j.fusengdes.2011.01.012

Cited by 6 publications

(3 citation statements)

References 6 publications

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“…In the development of complex models [94,95], this has been ascribed to a distribution of surface roughness features, though these are ultimately correlated empirically to particle size [96]. Such models have been implemented in MELCOR-fusion [97], though it is emphasized that the empirical constants have not been determined from fusionrelevant particles, flows, and surfaces, and so their predictive power is somewhat uncertain. There is additional uncertainty regarding what fraction of in-vessel dust might be mobilizable, given that much of it may be relatively tightly bound in co-deposited layers.…”

Section: Accidental Mobilization and Releasementioning

confidence: 99%

Materials-related issues in the safety and licensing of nuclear fusion facilities

et al. 2017

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Fusion power holds the promise of electricity production with a high degree of safety and low environmental impact. Favourable characteristics of fusion as an energy source provide the potential for this very good safety and environmental performance. But to fully realize the potential, attention must be paid in the design of a demonstration fusion power plant (DEMO) or a commercial power plant to minimize the radiological hazards. These hazards arise principally from the inventory of tritium and from materials that become activated by neutrons from the plasma. The confinement of these radioactive substances, and prevention of radiation exposure, are the primary goals of the safety approach for fusion, in order to minimize the potential for harm to personnel, the public, and the environment. The safety functions that are implemented in the design to achieve these goals are dependent on the performance of a range of materials. Degradation of the properties of materials can lead to challenges to key safety functions such as confinement. In this paper the principal types of material that have some role in safety are recalled. These either represent a potential source of hazard or contribute to the amelioration of hazards; in each case the related issues are reviewed. The resolution of these issues lead, in some instances, to requirements on materials specifications or to limits on their performance.

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Section: Accidental Mobilization and Releasementioning

confidence: 99%

Materials-related issues in the safety and licensing of nuclear fusion facilities

et al. 2017

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“…These specific versions were developed basing on their Light Water Reactors (LWRs) counterpart, but additional models were introduced to cope with the specific phenomena occurring in fusion reactors. In a previous MELCOR version (1.8.5) -not publicly available -different dust mobilization models were implemented [6], but these models weren't reintroduced in the latest released MELCOR 1.8.6 version [5]. Thus, the goal of the present paper is to describe the efforts did for the introduction and the validation of a resuspension model in this latest MELCOR 1.8.6 fusion version.…”

Section: Introductionmentioning

confidence: 99%

Implementation and validation of a resuspension model in MELCOR 1.8.6 for fusion applications

Bruno

Paci

2017

Fusion Engineering and Design

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“…Also, integrated computer codes widely used in fission field such as MELCOR [42] have been applied to evaluate accident steps and consequences in fusion reactors [43, 44, 45, 46] but a precise estimation on source term inventories as input for the software is still missing. Along with initial inventories, design and operational parameters are essential inputs to run the safety codes for accident scenarios analysis.…”

Section: Introductionmentioning

confidence: 99%

A novel integrated approach for the hazardous radioactive dust source terms estimation in future nuclear fusion power plants

Poggi

Malizia

Ciparisse

et al. 2016

Heliyon

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An open issue still under investigation by several international entities working on the safety and security field for the foreseen nuclear fusion reactors is the estimation of source terms that are a hazard for the operators and public, and for the machine itself in terms of efficiency and integrity in case of severe accident scenarios. Source term estimation is a crucial key safety issue to be addressed in the future reactors safety assessments, and the estimates available at the time are not sufficiently satisfactory. The lack of neutronic data along with the insufficiently accurate methodologies used until now, calls for an integrated methodology for source term estimation that can provide predictions with an adequate accuracy. This work proposes a complete methodology to estimate dust source terms starting from a broad information gathering. The wide number of parameters that can influence dust source term production is reduced with statistical tools using a combination of screening, sensitivity analysis, and uncertainty analysis. Finally, a preliminary and simplified methodology for dust source term production prediction for future devices is presented.

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An aerosol resuspension model for MELCOR for fusion

Cited by 6 publications

References 6 publications

Materials-related issues in the safety and licensing of nuclear fusion facilities

Materials-related issues in the safety and licensing of nuclear fusion facilities

Implementation and validation of a resuspension model in MELCOR 1.8.6 for fusion applications

A novel integrated approach for the hazardous radioactive dust source terms estimation in future nuclear fusion power plants

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