TY - GEN
T1 - FREQUENCY DOMAIN ANALYSIS OF HTR-LIKE MICROREACTORS
AU - Kinast, Shai
AU - Sivan, Doron
AU - Choi, Sooyoung
AU - Filippone, Claudio
AU - Kochunas, Brendan
N1 - Publisher Copyright:
Copyright © 2021 AMERICAN NUCLEAR SOCIETY, INCORPORATED, LA GRANGE PARK, ILLINOIS 60526.All rights reserved.
PY - 2021/1/1
Y1 - 2021/1/1
N2 - In this paper, a frequency domain analysis is used to study the frequency response of the Holos-Quad design, a high temperature gas microreactor. A 3-temperature reactor model is used, including heat balance equations for fuel, graphite moderator and helium coolant. The linearized equations are analyzed in the Laplace domain, and a full derivation of the the closed loop transfer function is presented. The analysis shows that the thermal-hydraulic feedback mechanisms dampen low-frequency perturbations compared to the zero power case. In these frequencies, Bode diagrams show that the feedback reduce the power gain of the reactor and yield a positive phase between reactivity and power. Time-domain analysis of several reactivity scenarios are also presented, and confirm the results of the frequency-domain analysis.
AB - In this paper, a frequency domain analysis is used to study the frequency response of the Holos-Quad design, a high temperature gas microreactor. A 3-temperature reactor model is used, including heat balance equations for fuel, graphite moderator and helium coolant. The linearized equations are analyzed in the Laplace domain, and a full derivation of the the closed loop transfer function is presented. The analysis shows that the thermal-hydraulic feedback mechanisms dampen low-frequency perturbations compared to the zero power case. In these frequencies, Bode diagrams show that the feedback reduce the power gain of the reactor and yield a positive phase between reactivity and power. Time-domain analysis of several reactivity scenarios are also presented, and confirm the results of the frequency-domain analysis.
KW - Frequency Domain Analysis
KW - HTGR
KW - Microreactor
KW - Transfer Function
UR - https://www.scopus.com/pages/publications/85183597022
U2 - 10.13182/M&C21-33807
DO - 10.13182/M&C21-33807
M3 - Conference contribution
AN - SCOPUS:85183597022
T3 - Proceedings of the International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2021
SP - 1517
EP - 1527
BT - Proceedings of the International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2021
PB - American Nuclear Society
T2 - 2021 International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2021
Y2 - 3 October 2021 through 7 October 2021
ER -