A scaled experimental study of control blade insertion dynamics in Pebble-Bed Fluoride-Salt-Cooled High-Temperature Reactors

Buster, Grant; Laufer, Michael; Peterson, Per F.

doi:10.1016/j.nucengdes.2016.04.015

Cited by 6 publications

(2 citation statements)

References 11 publications

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“…Designers apply the principle of passive safety not only through the physical design of the system via operating parameter selection and reactor neutronic feedback, but also using specific passive safety devices, such as shutdown blades with magnetic latches that drop into the core and shut down the system when the reactor loses power. 7,8 While many of these passive safety features forestall operational issues with elegance, they may not always represent the best option for reducing plant maintenance needs or for ensuring profitable operation. There may be cases for which active control is actually preferable to passive mechanisms.…”

Section: Iic Passive Safetymentioning

confidence: 99%

Advanced Reactor Control and Operations (ARCO): A University Research Facility for Developing Optimized Digital Control Rooms

et al. 2022

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The Advanced Reactor Control and Operations (ARCO) facility was constructed in January 2018 to serve as a test bed for advanced reactor control rooms and operator support systems. Since then, it has supported human-machine interface user experience research, fault detection and mitigation technology development, control room concept of operations development, and remote operations research. ARCO serves as the control room for the Compact Integral Effects Test (CIET) facility, which replicates the primary-side flow paths and thermal-hydraulic behavior of a fluoride-salt-cooled hightemperature reactor (FHR) using simulant fluids and scaling principles. New reactor designs feature different operating conditions and scenarios than those in existing reactors. ARCO supports the research and development of digital tools for operator communications, intuitive real-time data analysis, online health monitoring and prognostics, and control room cybersecurity. By integrating these different technologies, ARCO acts as a prototypical control system to iteratively develop methods and tools of operation in advanced small modular nuclear reactors. This paper describes the features of and challenges to operating advanced small modular reactors underlying the design basis for ARCO and its operator support systems.

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Section: Iic Passive Safetymentioning

confidence: 99%

Advanced Reactor Control and Operations (ARCO): A University Research Facility for Developing Optimized Digital Control Rooms

et al. 2022

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“…More specifically, we study the quasi-static penetration of a flexible beam in a two-dimensional dense bidisperse mixture of discs lying on a plate. Applications of this problem range from nuclear engineering [17] to biology: growth of roots [18,19] in structured soils or locomotion of worms or sandfish lizards in granular media [20].…”

Section: Introductionmentioning

confidence: 99%

Bending transition in the penetration of a flexible intruder in a two-dimensional dense granular medium

et al. 2018

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We study the quasi-static penetration of a flexible beam in a two-dimensional dense granular medium lying on an horizontal plate. Rather than a buckling-like behavior we observe a transition between a regime of crack-like penetration in which the fiber only shows small fluctuations around a stable straight geometry and a bending regime in which the fiber fully bends and advances through series of loading/unloading steps. We show that the shape reconfiguration of the fiber is controlled by a single non dimensional parameter: L/Lc, the ratio of the length of the flexible beam L to Lc, a bending elasto-granular length scale that depends on the rigidity of the fiber and on the departure from the jamming packing fraction of the granular medium. We show moreover that the dynamics of the bending transition in the course of the penetration experiment is gradual and is accompanied by a symmetry breaking of the granular packing fraction in the vicinity of the fiber. Together with the progressive bending of the fiber, a cavity grows downstream of the fiber and the accumulation of grains upstream of the fiber leads to the development of a jammed cluster of grains. We discuss our experimental results in the framework of a simple model of bending-induced compaction and we show that the rate of the bending transition only depends on the control parameter L/Lc.

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The packing factor of the pebble bed in molten salt reactor

Chen

Zou

Yan

et al. 2018

Annals of Nuclear Energy

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A scaled experimental study of control blade insertion dynamics in Pebble-Bed Fluoride-Salt-Cooled High-Temperature Reactors

Cited by 6 publications

References 11 publications

Advanced Reactor Control and Operations (ARCO): A University Research Facility for Developing Optimized Digital Control Rooms

Advanced Reactor Control and Operations (ARCO): A University Research Facility for Developing Optimized Digital Control Rooms

Bending transition in the penetration of a flexible intruder in a two-dimensional dense granular medium

The packing factor of the pebble bed in molten salt reactor

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