Analysis and comparison of direct inversion and Kalman filter methods for self-powered neutron detector compensation

Khoshahval, Farrokh; Zhang, Peng; Lee, Deokjung

doi:10.1016/j.nima.2020.164097

Cited by 10 publications

(6 citation statements)

References 17 publications

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“…For the purpose of rejecting Rhodium SPND signals, dynamical "gates" are applied, which are capable to account for the VVER core dynamics, physics of current generating in Rhodium SPND, type and magnitude of a certain detector signal [7][8][9][10] measured and equipment polling cycle using the following formulas: The values of the coefficients are determined proceeding from the physics of active nature of current generating in a Rhodium SPND, and a selected type of filter.…”

Section: If Spnd Current Rejectionmentioning

confidence: 99%

“…For the purpose of function of time delay elimination, this technical solution discusses two filters, these are a corrective filter and Kalman filter [7,8].…”

Section: Elimination Of Time Delaymentioning

confidence: 99%

“…A nuclear reaction in view of main current generating processes within a detector emitter [5,[7][8][9][10], may be depicted in the following way (Fig. 4).…”

Section: Elimination Of Time Delaymentioning

confidence: 99%

“…For the purpose of our option (Rhodium diameter is 0.5мм, c=6%, velocity of local power density increase is at most 5% per second), calculated and performed a survey of Kalman filter parameters (F-K) [5][6][7][8]. Kalman filter is capable to take into account the SPND transformation function and ensure the value of noise boost coefficient as six at most (almost three times less than a corrective filter) with time delay 0.5 second at most.…”

Section: Elimination Of Time Delaymentioning

confidence: 99%

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Algorithms for processing self-powered neutron detector signals important for determination of local parameters in each part of the VVER core

Lys

Kanyuka²

2022

EPJ Nuclear Sci. Technol.

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These investigation findings prove the possibility of a engineering solution for VVER core automatic protection during operation in both nominal and transient conditions within ICIS using local parameters (i.e. linear heat power of the most stressed fuel rod, departure from nucleate boiling ratio). Such engineering solution will be implemented by safety system software-hardware (PTK-Z) on the basis of signals coming from in-core neutron flux detectors, temperature sensors, primary coolant flow and coolant pressure transducers. The article presents the following: a list of in-core neutron flux detectors, a list of transducers of primary coolant monitoring for thermal engineering conditions (temperature, flow rate, pressure), whose signals are delivered to the terminals of instrumentation gauges (PTK-Z) for the purpose of actuating safety actions in accordance with local parameters. The paper shows arrangement of in-core neutron flux detector equipment, above view of self-powered neutron detector (SPND) location in safety channels, axial arrangement of SPND along the core, algorithms for processing SPND signals important for determination of local parameters in each part of the core in both normal and abnormal operation conditions.

show abstract

Section: If Spnd Current Rejectionmentioning

confidence: 99%

“…For the purpose of function of time delay elimination, this technical solution discusses two filters, these are a corrective filter and Kalman filter [7,8].…”

Section: Elimination Of Time Delaymentioning

confidence: 99%

“…A nuclear reaction in view of main current generating processes within a detector emitter [5,[7][8][9][10], may be depicted in the following way (Fig. 4).…”

Section: Elimination Of Time Delaymentioning

confidence: 99%

Section: Elimination Of Time Delaymentioning

confidence: 99%

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Algorithms for processing self-powered neutron detector signals important for determination of local parameters in each part of the VVER core

Lys

Kanyuka²

2022

EPJ Nuclear Sci. Technol.

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“…Due to these conditions, Rh-SPNDs are most often used for core flux mapping during steady-state operations rather than reactor safety and control. However, the delayed-response compensation methods such as direct inversion and Kalman filters have been extensively researched to improve the response time to demonstrate the potential for reactor safety and control use [3], [4], [5].…”

Section: Rh-spnd Overviewmentioning

confidence: 99%

Development of Temperature Compensation Tools for SPNDs Operating in High Temperature Environments

Tsai

2022

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Two rhodium-based self-powered neutron detectors (Rh-SPNDs) were irradiated at the Massachusetts Institute of Technology Reactor as a follow-on experiment to the heated irradiation previously conducted at the Neutron Radiography facility at Idaho National Laboratory. The experiment was conducted over the temperature ranges of 600-850°C to further examine the effects of temperature on the Rh-SPNDs. Four tests of varying temperature and power were performed. The tests identified two types of temperature effects consistent with historical evaluations. One effect is a prompt proportionality to temperature at steady-state reactor power due to the decrease in Rh-SPND insulation resistance. The other effect is a delayed effect generated from displacement currents generated by changing the space charge within the insulator as a function of temperature.The result of this experiment demonstrates a characterizable responses to temperature that shows feasibility for developing a temperature compensation tool for SPNDs operating in high temperatures. The characteristics identified in this experiment will be integrated within the delayed-response compensation techniques for a fiscal year 2023 (FY-23) evaluation.vii

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A Monte Carlo method for quantitatively calculating the neutron sensitivity of rhodium self-powered neutron detectors in reactors

Wu,

Jiang,

et al. 2023

Radiat Detect Technol Methods

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Analysis and comparison of direct inversion and Kalman filter methods for self-powered neutron detector compensation

Cited by 10 publications

References 17 publications

Algorithms for processing self-powered neutron detector signals important for determination of local parameters in each part of the VVER core

Algorithms for processing self-powered neutron detector signals important for determination of local parameters in each part of the VVER core

Development of Temperature Compensation Tools for SPNDs Operating in High Temperature Environments

A Monte Carlo method for quantitatively calculating the neutron sensitivity of rhodium self-powered neutron detectors in reactors

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