Results 1 to 10 of about 384 (152)

Flux estimation from Vanadium and Cobalt Self Powered Neutron Detectors (SPNDs): Nonlinear exact inversion and Kalman filter approaches

2012 American Control Conference (ACC), 2012
Self Powered Neutron Detectors (SPNDs), which are widely used in a nuclear reactor for flux measurement, typically have different types of dynamics based on their emitter material: one delayed, second prompt and possibly nonlinear response characteristics. The measurement from the SPNDs hence need compensation to obtain the actual input flux.
Krishnan Srinivasarengan, Laxman Mutyam, Madhu N. Belur, Mani Bhushan, A. P. Tiwari, M. G. Kelkar, M. Pramanik   +6 more
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Numerical analysis of the space charge effect in SPNDs based on the charge conservation principle

Journal of Instrumentation
Abstract Low-energy electrons emitted from self-powered neutron detectors(SPNDs) typically induce the space charge effect, attributed to the intrinsically high resistivity of insulator materials. As a pivotal phenomenon in SPND theoretical simulations, this effect directly impacts both the prediction accuracy of the response
Y. Zhou, Z.Y. Liu, L.Z. Cao, L.P. Wang, R.Z. Shao, H.Y. Peng, H.C. Wu   +6 more
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A comparative study of Kalman filter and Linear Matrix Inequality based H infinity filter for SPND delay compensation

Annals of Nuclear Energy, 2016
Abstract This paper deals with delay compensation of vanadium Self Powered Neutron Detectors (SPNDs) using Linear Matrix Inequality (LMI) based H-infinity filtering method and compares the results with Kalman filtering method. The entire study is established upon the framework of neutron flux estimation in large core Pressurized Heavy Water Reactor ...
TAMBOLI, PK, DUTTAGUPTA, SP, ROY, K
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Denoising SPND signal by discrete wavelet analysis for efficient power feedback in regulating system of PHWRs under noisy environment

2011 2nd National Conference on Emerging Trends and Applications in Computer Science, 2011
This paper aims to denoise a neutron power sensor data which is the output of Self Powered Neutron Detector (SPND) in each of the Liquid Zone Compartments (LZC) in a nuclear reactor core. Noisy data measured over long period is analyzed with different types of wavelets by one dimensional Discrete Wavelet Transform (DWT) technique to investigate the ...
Basudev Majumder, Saptarshi Das, Indranil Pan, Shantanu Das, Amitava Gupta   +4 more
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Simulation of SPND Beta-Current in AP1000 Core

International Conference on Physics of Reactors 2022 (PHYSOR 2022), 2022
Ruizhi Shao, Liangzhi Cao, Yunzhao Li, Fengwei Si, Tengfei Hao, Chao Du, Wan Chenghui, Wei Shen   +7 more
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Sensitivity analysis of AHWR flux mapping system for unavailability of SPNDs

Nuclear Engineering and Design, 2022
B. Anupreethi, Vidya Sagar Yellapu, Anurag Gupta, Umasankari Kannan, Akhilanand Pati Tiwari   +4 more
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Application of Prompt Self-Powered Neutron Detectors to the Lead-Cooled Fast Reactor Demonstrator ALFRED: Validation of the Monte Carlo Model for Selected SPNDs

Journal of Nuclear Engineering and Radiation Science, 2017
The advanced lead fast reactor European demonstrator (ALFRED) is a European research initiative into the framework of the Generation IV International Forum facilities. ALFRED is a scaled down reactor compared to the industrial prototype European lead fast reactor proposed in lead-cooled European advanced demonstration reactor.
LEPORE, LUIGI, REMETTI, Romolo
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Analysis of WIRE-21 SPND and Optical Fiber Sensor Measurements

2023
Daniel Sweeney, Padhraic Mulligan, Christian Petrie   +2 more
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A novel simultaneous partial nitrification and denitratation (SPND) process in single micro-aerobic sequencing batch reactor for stable nitrite accumulation under ambient temperature

Chemical Engineering Journal, 2021
Liping Ma, Wenru Liu, Junjiang Chen
exaly  

Steady and Transient Analysis of Flow and Heat Transfer in SPND Assembly

2014
This thesis presents the analysis of flow and heat transfer for the SPND (Self-Powered Neutron Detector) system used within the nuclear reactor core in the U.S. Evolutionary Power Reactor developed by AREVA. The SPND system is composed of six individual detectors which are used for in-core measurement of thermal neutron flux.
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