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Data-Driven Digital Twins for Health-Aware Supervisory Control of Nuclear Reactors
Data-Driven Digital Twins for Health-Aware Supervisory Control of Nuclear Reactors
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105245
- ISBN
- 9798291569658
- DDC
- 539.76
- 저자명
- Lim, Jasmin Y.
- 서명/저자
- Data-Driven Digital Twins for Health-Aware Supervisory Control of Nuclear Reactors
- 발행사항
- [Sl] : University of Michigan, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 202 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-03, Section: A.
- 주기사항
- Advisor: Duraisamy, Karthik.
- 학위논문주기
- Thesis (Ph.D.)--University of Michigan, 2025.
- 초록/해제
- 요약Digital twins dynamically link a physical system and its virtual counterpart through autonomous, bidirectional communication that realizes value. Reliable and real-time monitoring is empowered with the integration of data-driven methods, which facilitate whole-system analysis and uncertainty quantification. In this thesis, a digital twin framework with various data-enhanced methods is developed to reduce operational costs and increase safety awareness of a Fluoride-salt-cooled High-temperature Reactor (FHR) - a Generation-IV (Gen-IV) reactor concept. Nuclear power plants have low carbon emissions and a flexible design, making them advantageous for addressing the growing global power demands, as well as for applications such as space exploration, hydrogen production, industrial heating, and powering data centers. The conceptualized digital twin aims to support health-aware, cost-effective operations of an FHR and narrow the knowledge uncertainty gap, assisting in future design, deployment, and operational efforts.A closed-loop digital twin framework that streamlines end-to-end communication hasbeen developed for the synchronous regulation and self-adjustment of the Physical Asset - the FHR plant. The framework connects the four modules of a digital twin: the Physical Asset, the Virtual Asset, the Physical-to-Virtual Module, and the Virtual-to-Physical Module. Within the Virtual to Physical Module are two agents that autonomously drive load-following operations: a Reinforcement Learning (RL) agent that optimizes plant power and schedules maintenance; and a Reference Governor agent that enforces multiple system constraints.For the Virtual Asset, a reduced-complexity hybrid surrogate was created to model the FHR plant. The hybrid structure incorporates physics-based models to enhance application-specific accuracy and utilizes data-driven methods to reduce modeling costs. Real-time prediction is made possible with the development of statistical surrogate models, which are structured into a network to separate the high-dimensional state-space, addressing the diverse transient dynamics. In conjunction with a physics-based pump component health surrogate model, the Virtual Asset is more than 4000 times faster than physics-only simulations, with over 98% mean percent accuracy in key states. Real-time adaptation of the Virtual Asset is enabled by applying the Ensemble Kalman Filter data assimilation algorithm in the Physical-to-Virtual Module. Due to its inherent probabilistic formulation, the filtering algorithm bridges diverse information sources (e.g., simulation, data) through uncertainty quantification and propagation, promoting overall system transparency. Using a state-parameter adaptation scheme, the data assimilation corrects digital state estimations and parameters of the plant surrogate model, enabling the digital twin to recalibrate to the Physical Asset over its lifetime simultaneously.The digital twin framework is demonstrated in three cases, using physics-based simulation to emulate the Physical Asset. In the first case, a year-long supervision of the plant displays the RL component maintenance scheduling, with hourly Virtual Asset updates. The data assimilation frequency is increased in the second case to refine accuracy in the power transition regions, with no significant impact on run-time. Finally, in the last case, a system shock indicates that necessary updates are needed for the framework to adaptand capture the new dynamics. These cases demonstrate the robustness and modularity of the framework for both normal and abnormal plant environments, informing future implementations for FHRs and beyond.
- 일반주제명
- Nuclear engineering
- 일반주제명
- Aerospace engineering
- 일반주제명
- Computer engineering
- 일반주제명
- Communication
- 키워드
- Digital twins
- 기타저자
- University of Michigan Aerospace Engineering
- 기본자료저록
- Dissertations Abstracts International. 87-03A.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105245
■006m o d
■007cr#unu||||||||
■020 ▼a9798291569658
■035 ▼a(MiAaPQ)AAI32272041
■035 ▼a(MiAaPQ)umichrackham006328
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a539.76
■1001 ▼aLim, Jasmin Y.
■24510▼aData-Driven Digital Twins for Health-Aware Supervisory Control of Nuclear Reactors
■260 ▼a[Sl]▼bUniversity of Michigan▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a202 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-03, Section: A.
■500 ▼aAdvisor: Duraisamy, Karthik.
■5021 ▼aThesis (Ph.D.)--University of Michigan, 2025.
■520 ▼aDigital twins dynamically link a physical system and its virtual counterpart through autonomous, bidirectional communication that realizes value. Reliable and real-time monitoring is empowered with the integration of data-driven methods, which facilitate whole-system analysis and uncertainty quantification. In this thesis, a digital twin framework with various data-enhanced methods is developed to reduce operational costs and increase safety awareness of a Fluoride-salt-cooled High-temperature Reactor (FHR) - a Generation-IV (Gen-IV) reactor concept. Nuclear power plants have low carbon emissions and a flexible design, making them advantageous for addressing the growing global power demands, as well as for applications such as space exploration, hydrogen production, industrial heating, and powering data centers. The conceptualized digital twin aims to support health-aware, cost-effective operations of an FHR and narrow the knowledge uncertainty gap, assisting in future design, deployment, and operational efforts.A closed-loop digital twin framework that streamlines end-to-end communication hasbeen developed for the synchronous regulation and self-adjustment of the Physical Asset - the FHR plant. The framework connects the four modules of a digital twin: the Physical Asset, the Virtual Asset, the Physical-to-Virtual Module, and the Virtual-to-Physical Module. Within the Virtual to Physical Module are two agents that autonomously drive load-following operations: a Reinforcement Learning (RL) agent that optimizes plant power and schedules maintenance; and a Reference Governor agent that enforces multiple system constraints.For the Virtual Asset, a reduced-complexity hybrid surrogate was created to model the FHR plant. The hybrid structure incorporates physics-based models to enhance application-specific accuracy and utilizes data-driven methods to reduce modeling costs. Real-time prediction is made possible with the development of statistical surrogate models, which are structured into a network to separate the high-dimensional state-space, addressing the diverse transient dynamics. In conjunction with a physics-based pump component health surrogate model, the Virtual Asset is more than 4000 times faster than physics-only simulations, with over 98% mean percent accuracy in key states. Real-time adaptation of the Virtual Asset is enabled by applying the Ensemble Kalman Filter data assimilation algorithm in the Physical-to-Virtual Module. Due to its inherent probabilistic formulation, the filtering algorithm bridges diverse information sources (e.g., simulation, data) through uncertainty quantification and propagation, promoting overall system transparency. Using a state-parameter adaptation scheme, the data assimilation corrects digital state estimations and parameters of the plant surrogate model, enabling the digital twin to recalibrate to the Physical Asset over its lifetime simultaneously.The digital twin framework is demonstrated in three cases, using physics-based simulation to emulate the Physical Asset. In the first case, a year-long supervision of the plant displays the RL component maintenance scheduling, with hourly Virtual Asset updates. The data assimilation frequency is increased in the second case to refine accuracy in the power transition regions, with no significant impact on run-time. Finally, in the last case, a system shock indicates that necessary updates are needed for the framework to adaptand capture the new dynamics. These cases demonstrate the robustness and modularity of the framework for both normal and abnormal plant environments, informing future implementations for FHRs and beyond.
■590 ▼aSchool code: 0127.
■650 4▼aNuclear engineering
■650 4▼aAerospace engineering
■650 4▼aComputer engineering
■650 4▼aCommunication
■653 ▼aDigital twins
■653 ▼aData-driven modeling
■653 ▼aSurrogate modeling
■653 ▼aGeneration-IV nuclear reactors
■653 ▼aFluoride-salt-cooled High-temperature Reactor
■690 ▼a0538
■690 ▼a0552
■690 ▼a0464
■690 ▼a0459
■71020▼aUniversity of Michigan▼bAerospace Engineering.
■7730 ▼tDissertations Abstracts International▼g87-03A.
■790 ▼a0127
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359980▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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