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Transient Modeling of a Radiantly Integrated TPV–Microreactor System (RITMS) Design.

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Title: Transient Modeling of a Radiantly Integrated TPV–Microreactor System (RITMS) Design.
Authors: Kaffezakis, Naiki1 (AUTHOR), Kotlyar, Dan1 (AUTHOR) dan.kotlyar@me.gatech.edu
Source: Energies (19961073). Dec2025, Vol. 18 Issue 23, p6361. 22p.
Subjects: Transient analysis, Microreactors, Engineering reliability theory, Simulation software, Risk assessment, Reactivity (Chemistry), Thermophotovoltaic cells
Abstract: Powered by high-efficiency thermophotovoltaics and developed through economics-by-design analysis, a promising, optimized design was selected for the radiantly integrated TPV–microreactor system. However, the novelty of the conversion system, the connection between the TPV and critical reactor core, requires a proper degree of reliability analysis to develop confidence in this technology. This is made difficult by the lack of computational tools that capture the full suite of physics and feedback mechanisms present in the RITMS design. This paper outlines the methods utilized to capture power, temperature, and reactivity variation and feedback mechanisms through time, utilizing lumped conditions, point kinetics equations, and the determination of temperature reactivity coefficients. The computational package was applied to a series of accident-driven transient scenarios, demonstrating the RITMS design's ability to return to a safe operating equilibrium without active interference. In the case of high positive reactivity insertion accidents, design solutions were demonstrated that would mitigate risk. [ABSTRACT FROM AUTHOR]
Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Transient Modeling of a Radiantly Integrated TPV–Microreactor System (RITMS) Design.
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  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Dec2025, Vol. 18 Issue 23, p6361. 22p.
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  Data: <searchLink fieldCode="DE" term="%22Transient+analysis%22">Transient analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Microreactors%22">Microreactors</searchLink><br /><searchLink fieldCode="DE" term="%22Engineering+reliability+theory%22">Engineering reliability theory</searchLink><br /><searchLink fieldCode="DE" term="%22Simulation+software%22">Simulation software</searchLink><br /><searchLink fieldCode="DE" term="%22Risk+assessment%22">Risk assessment</searchLink><br /><searchLink fieldCode="DE" term="%22Reactivity+%28Chemistry%29%22">Reactivity (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Thermophotovoltaic+cells%22">Thermophotovoltaic cells</searchLink>
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  Label: Abstract
  Group: Ab
  Data: Powered by high-efficiency thermophotovoltaics and developed through economics-by-design analysis, a promising, optimized design was selected for the radiantly integrated TPV–microreactor system. However, the novelty of the conversion system, the connection between the TPV and critical reactor core, requires a proper degree of reliability analysis to develop confidence in this technology. This is made difficult by the lack of computational tools that capture the full suite of physics and feedback mechanisms present in the RITMS design. This paper outlines the methods utilized to capture power, temperature, and reactivity variation and feedback mechanisms through time, utilizing lumped conditions, point kinetics equations, and the determination of temperature reactivity coefficients. The computational package was applied to a series of accident-driven transient scenarios, demonstrating the RITMS design's ability to return to a safe operating equilibrium without active interference. In the case of high positive reactivity insertion accidents, design solutions were demonstrated that would mitigate risk. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Code: eng
        Text: English
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        PageCount: 22
        StartPage: 6361
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      – SubjectFull: Transient analysis
        Type: general
      – SubjectFull: Microreactors
        Type: general
      – SubjectFull: Engineering reliability theory
        Type: general
      – SubjectFull: Simulation software
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      – SubjectFull: Risk assessment
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      – SubjectFull: Reactivity (Chemistry)
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      – SubjectFull: Thermophotovoltaic cells
        Type: general
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      – TitleFull: Transient Modeling of a Radiantly Integrated TPV–Microreactor System (RITMS) Design.
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            – D: 01
              M: 12
              Text: Dec2025
              Type: published
              Y: 2025
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            – TitleFull: Energies (19961073)
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