Main Low Energy β Emitter Radioactivity and Control Method Research in Nuclear Power Plant

AbstractCoherent elastic neutrino–nucleus scattering ($$\hbox {CE}\nu \hbox {NS}$$CEνNS) offers a unique way to study neutrino properties and to search for new physics beyond the Standard Model. Nuclear reactors are promising sources to explore this process at low energies since they deliver large fluxes of anti-neutrinos with typical energies of a few MeV. In this paper, a new-generation experiment to study $$\hbox {CE}\nu \hbox {NS}$$CEνNS is described. The NUCLEUS experiment will use cryogenic detectors which feature an unprecedentedly low-energy threshold and a time response fast enough to be operated under above-ground conditions. Both sensitivity to low-energy nuclear recoils and a high event rate tolerance are stringent requirements to measuring $$\hbox {CE}\nu \hbox {NS}$$CEνNS of reactor anti-neutrinos. A new experimental site, the Very-Near-Site (VNS), at the Chooz nuclear power plant in France is described. The VNS is located between the two 4.25 $$\hbox {GW}_{\mathrm {th}}$$GWth reactor cores and matches the requirements of NUCLEUS. First results of on-site measurements of neutron and muon backgrounds, the expected dominant background contributions, are given. In this paper a preliminary experimental set-up with dedicated active and passive background reduction techniques and first background estimations are presented. Furthermore, the feasibility to operate the detectors in coincidence with an active muon veto at shallow overburden is studied. The paper concludes with a sensitivity study pointing out the physics potential of NUCLEUS at the Chooz nuclear power plant.

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An Active Vibration Control Method for Typical Piping System of Nuclear Power Plant

2021 IEEE 10th Data Driven Control and Learning Systems Conference (DDCLS) ◽

10.1109/ddcls52934.2021.9455612 ◽

2021 ◽

Author(s):

Xiaomeng Zhang ◽

Tao Sui ◽

Haishuai Zhang ◽

Yanzhu Zhang ◽

Lu Liu ◽

...

Keyword(s):

Power Plant ◽

Nuclear Power Plant ◽

Vibration Control ◽

Nuclear Power ◽

Control Method ◽

Active Vibration Control ◽

Piping System ◽

Active Vibration

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Design and Function Realization of Nuclear Power Inspection Robot System

Robotica ◽

10.1017/s0263574720000740 ◽

2020 ◽

Vol 39 (1) ◽

pp. 165-180

Author(s):

Zhang Zhonglin ◽

Fu Bin ◽

Li Liquan ◽

Yang Encheng

Keyword(s):

Control System ◽

Remote Control ◽

Power Plant ◽

Nuclear Power Plant ◽

Pid Control ◽

Nuclear Power ◽

Control Operation ◽

Inspection Robot ◽

Walking Mechanism ◽

And Control

SUMMARYThe particularity of nuclear power plant environment requires that the nuclear power inspection robot must be remote control operation. The main purpose of the inspection robot is to carry out inspection, prevention, reporting, and safety emergency operation on the instruments, so as to provide guarantee for the safe operation of the nuclear power plant. Based on the representative configuration of nuclear power robot at home and abroad, this paper develops a small and lightweight nuclear power plant inspection robot, including walking mechanism, lifting mechanism, operating mechanism, image acquisition, information communication and control system, etc., to carry on the statics analysis to the key components of the inspection robot and verify that the stiffness and strength of the mechanical structure meet the requirements of lightweight design. Modal analysis is carried out to verify that the motor does not cause resonance when working. The kinematic model of the robot has been established and can provide the theoretical basis for the controller design. A hierarchical control system based on LabVIEW upper computer monitoring and control operation interface is established, which uses adaptive fuzzy Proportional Integral Derivative (PID) control to simulate the walking control, and then realizes the control of walking mechanism through software programming, and the adaptive fuzzy PID control has better effect than the conventional PID control. The S-type acceleration and deceleration algorithm is used to realize the accurate control of the position location of the lifting mechanism. Finally, combined with the experiment of 5MS robot comprehensive experimental platform, it is proved that the inspection robot can realize remote control function operation.

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Study on Sensor with Mechanical Properties in Nuclear Power Plant with Application of BP Neural Network to Fault Tolerant Control

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.644.56 ◽

2013 ◽

Vol 644 ◽

pp. 56-59

Author(s):

Jin Yang Li ◽

Hong Xia ◽

Shou Yu Cheng

Keyword(s):

Neural Network ◽

Mechanical Properties ◽

Power Plant ◽

Nuclear Power Plant ◽

Bp Neural Network ◽

Nuclear Power ◽

Control Method ◽

Fault Tolerant ◽

Fault Tolerant Control ◽

Level Sensor

All kinds of sensor with mechanical properties often can go wrong in nuclear power plant. In this kind of situation, it puts forward a kind of active fault tolerant control method based on the improved BP neural network. Firstly, the method will train sensor by BP neural network. Secondly, it will be established dynamic model bank in all kinds of running state. The system will be detected by using BP neural network real time. When the sensor goes wrong, it will be controled by reconstruction. Taking pressurizer water-level sensor as the case, a simulation experiment was performed on the nuclear power plant simulator. The results showed that the proposed method is valid for the fault tolerant control of sensor in nuclear power plant.

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Modernization of the Safety I&C at the Dukovany VVER 440/213 Nuclear Power Plant

Volume 5: Fuel Cycle and High and Low Level Waste Management and Decommissioning; Computational Fluid Dynamics (CFD), Neutronics Methods and Coupled Codes; Instrumentation and Control ◽

10.1115/icone17-75706 ◽

2009 ◽

Author(s):

Jean-Michel Palaric ◽

Philippe Rebreyend ◽

Philippe Mouly ◽

Claude Esmenjaud ◽

Frantisˇek Dalik

Keyword(s):

Industrial Organization ◽

Power Plant ◽

Nuclear Power Plant ◽

Nuclear Power ◽

Digital Technologies ◽

Design Criteria ◽

Special Focus ◽

Main Design ◽

And Control

The modernization of the Dukovany nuclear power plant (four VVER 440 MWe reactor units owned by CˇEZ, the Czech national utility) is presented with a special focus on the digital safety instrumentation and control (I&C) system. The first Unit has been successfully modernized in compliance with the initial schedule. The following matters are further discussed in this paper: • Goal, scope and industrial organization of this modernization, • Main design criteria and I&C architecture, • Digital technologies in use, • Design and Licensing processes, • On-site installation strategy and main milestones, • Progress of work.

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