Design of a nuclear reactor controller using a model predictive control method

Na, Man Gyun; Jung, Dong Won; Shin, Seung-Shick; Lee, Sun Mi; Lee, Yoon Joon; Jang, Jae Won; Lee, Ki Bog

doi:10.1007/bf02990213

Cited by 12 publications

(4 citation statements)

References 14 publications

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“…Based on results of these studies, field implementation and in-service tests can be conducted at one of the existing facilities, so that lessons learned could be incorporated into the future generation of CANDU reactor design as a sustainable long-term solution based on widely available and supported modern technology [17][18][19][20]. It is anticipated that this project will involve high levels of financial costs and multidisciplinary resources, and thus future work will depend on industry interest in advancing this proposal.…”

Section: Discussionmentioning

confidence: 99%

Analysis of Liquid Zone Control Valve Oscillation Problem in CANDU Reactors

Nasimi¹

2013

Journal of Engineering

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This paper looks at the existing challenges with steady-state Liquid Zone control at some CANDU (CANada Deuterium Uranium) stations, where-contrary to expectations for equilibrium flow-Liquid Zone Control Valve oscillations have proven to be a chronic, unanticipated challenge. Currently, the exact causes of this behaviour are not fully understood, although it is confirmed that the Control Valve oscillations are not due to automatic power adjustment requests or zone level changes due to process leaks. This phenomenon was analysed based on a case study of one domestic nuclear power station to determine whether it could be attributed to inherent controller properties. Next, a proposal is made in an attempt to improve current performance with minimal changes to the existing system hardware and logic using conventional technologies. Finally, a proposal was made to consider Model Predictive Control-based technology to minimize the undesirable Control Valve oscillations at steady state based on the obtained simulation results and discussion of other available alternatives.

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Section: Discussionmentioning

confidence: 99%

Analysis of Liquid Zone Control Valve Oscillation Problem in CANDU Reactors

Nasimi¹

2013

Journal of Engineering

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“…Core power control systems are usually required to achieve two key functions, core power control and reactivity disturbance suppression 3 . In recent years, with the popularity of fully digital instrumentation and control systems in large commercial reactors, many advanced control methods based on digital instrumentation and control systems have been proposed, such as model-referenced adaptive control 4 , 5 , model predictive control 6 – 8 , fuzzy logic control 9 , linear quadratic Gaussian with loop transfer recovery 10 , 11 , sliding mode control 12 – 14 , and fractional-order control 15 , 16 , etc. These advanced control methods have been gradually tested and demonstrated in some Nuclear Power Plants (NPPs) with relatively high technology maturity, as the technology maturity has increased to ensure reactor safety.…”

Section: Introductionmentioning

confidence: 99%

Reactivity disturbance suppression method for small modular reactors based on core coolant flow control

Xie

Duan²,

Ping³

et al. 2022

Sci Rep

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Small modular reactors (SMR) have an exceptionally wide range of applications due to their flexibility. But the reactivity of SMR is more susceptible to disturbance than that of large commercial reactors, which may cause the core power to deviate from the set value, and the limited internal space makes it difficult for SMR to compensate or adjust for reactivity disturbance by setting a sufficient number of control rods as in large commercial reactors. Therefore, in order to improve the operational stability of SMR, a method is proposed to indirectly change the nuclear fuel temperature by adjusting the coolant flow rate and thus compensate the reactivity disturbance by the Doppler effect of nuclear fuel resonance absorption. Simulation experiments show that the method can effectively eliminate reactive disturbances that cannot be completely eliminated by control rods under the conditions of restricted SMR space and limited number of control rod sets, thus providing operational stability of SMR.

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“…For the core power level control, there are some advanced methods are developed gradually. Including Model Reference adaptive control [4][5], model predictive control [6][7][8], fuzzy logical control [9], linear quadratic gaussian with loop transfer recovery [10][11], sliding mode control [12][13][14], and fractional order control [15,16]. Some of them have gradually become mature methods for power level control.…”

Section: Introductionmentioning

confidence: 99%

Small Modular Reactor Reactivity Disturbance Suppression Method Based on Core Coolant Flow Control

Xie

Duan

Ping

et al. 2021

Preprint

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Nuclear reactors may suffer from various disturbances during operation. These disturbances can cause core power deviates from the set parameters, and affect the power level of reactors. Due to the limited internal space of the reactor, the number of control rods is small. It is difficult to set up control rod groups dedicated to reactive compensation for modular reactor of medium or small size. Therefore, it is necessary to study a set of reactivity compensation measures that do not rely on control rods according to the actual needs of modular reactors to compensate for the power deviation caused by reactivity disturbances. A disturbance suppression method based on coolant flow control is proposed in the study. This method takes advantage of the Doppler effect of the coolant temperature, and changes the coolant flow rate to affect its temperature when reactive disturbances occur, thereby compensating for fluctuations of reactivity. Numerical experiments show that this method can effectively suppress the power deviation caused by reactive disturbances, and has engineering application value.

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Design of a nuclear reactor controller using a model predictive control method

Cited by 12 publications

References 14 publications

Analysis of Liquid Zone Control Valve Oscillation Problem in CANDU Reactors

Analysis of Liquid Zone Control Valve Oscillation Problem in CANDU Reactors

Reactivity disturbance suppression method for small modular reactors based on core coolant flow control

Small Modular Reactor Reactivity Disturbance Suppression Method Based on Core Coolant Flow Control

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