scholarly journals Comparative Evaluation of Three Wireless Sensor Network Transceivers in a High Radiation Environment

2020 ◽  
Vol 225 ◽  
pp. 08007
Author(s):  
Q. Huang ◽  
J. Jiang ◽  
Y. Q. Deng
Keyword(s):  
Nuclear Power ◽  
Nuclear Reactor ◽  
Experimental Studies ◽  
High Dose Rate ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Radiation Environment ◽  
High Dose ◽  
Rate Condition ◽  
High Level

This paper presents on the results of radiation studies for three commonly used wireless sensor nodes based on the following protocols: ZigBee, WirelessHART, ISA 100.11a, and network devices built with commercial off-the-shelf (COTS) components. The level of radiation considered is at par with that experienced at Fukushima Daiichi Nuclear Power Plant after the accident. An experimental setup is developed to monitor behaviors of each wireless device and network real-time under the 60Co gamma radiator at The Ohio State University Nuclear Reactor Lab (OSU-NRL). The experimental results have indicated that the performance of the communication channels and wireless signal parameters do not degrade significant under such radiation. However, all the tested devices and networks can only survive for several hours under the high dose rate condition (20 K Rad/h). The results of these experimental studies have provided useful references to those who design and manufacture COTS-based wireless monitoring systems for use in high level radiation environments.

SU-E-I-26: When Is High Level-Control Fluoroscopy Not High Dose-Rate Fluoroscopy?

2013 ◽  
Vol 40 (6Part5) ◽  
pp. 130-131
Author(s):  
D Bednarek ◽  
J PazLozada ◽  
S Rudin
Keyword(s):  
Dose Rate ◽  
High Dose Rate ◽  
High Dose ◽  
Level Control ◽  
High Level

Experience of Application of New Remote Controlled Instruments for Scanning of Distribution of Radioactive Contamination in Rooms With High Dose Rate

2011 ◽  
Author(s):  
V. E. Stepanov ◽  
A. S. Danilovich ◽  
O. P. Ivanov ◽  
V. N. Potapov ◽  
S. V. Smirnov ◽  
...  
Keyword(s):  
Remote Control ◽  
Radioactive Contamination ◽  
Gamma Camera ◽  
Background Radiation ◽  
High Dose Rate ◽  
High Dose ◽  
Kurchatov Institute ◽  
Nuclear Facilities ◽  
High Level ◽  
Spectrometric System

When carrying out the decommissioning of nuclear facilities is necessary to measure the distribution of radioactive contamination in the rooms and the equipment at high levels of background radiation. In the decommissioning of the reactor in the MR NRC “Kurchatov Institute” for such problems is developed and applied a few special systems with remote control. For a survey of high-level objects used mounted on the robot radiometric system. To determine the composition of pollutants and use a portable collimated spectrometric system. To obtain a detailed distribution of contamination of used remote-controlled gamma camera.

Stimulation of Radiation Damage Recovery of Lead Tungstate Scintillation Crystals Operating in a High Dose-Rate Radiation Environment

2013 ◽  
Vol 60 (2) ◽  
pp. 1368-1372 ◽  
Author(s):  
Andrei E. Borisevitch ◽  
Valeri I. Dormenev ◽  
Andrei A. Fedorov ◽  
Mikhail V. Korjik ◽  
Till Kuske ◽  
...  
Keyword(s):  
Dose Rate ◽  
Radiation Damage ◽  
High Dose Rate ◽  
Radiation Environment ◽  
High Dose ◽  
Lead Tungstate ◽  
Scintillation Crystals ◽  
Stimulation Of

Determination of Specific Heat of Eutectic Indium – Bismuth-Tin Liquid Metal Alloys as a Test Material for Liquid Metal - Cooled Applications

2013 ◽  
Vol 420 ◽  
pp. 185-193 ◽  
Author(s):  
Adam Lipchitz ◽  
Glenn Harvel ◽  
Takeyoshi Sunagawa
Keyword(s):  
Liquid Metal ◽  
Thermodynamic Properties ◽  
Specific Heat ◽  
Nuclear Power ◽  
Nuclear Reactor ◽  
Metal Flow ◽  
Weight Percent ◽  
Test Material ◽  
Plant Operations ◽  
High Level

Currently, Russia, India, China, France, South Korea, and Japan are actively pursuing liquid metal cooled applications such as liquid cooled metal nuclear reactor concepts. The liquid metal coolants being considered for these designs are sodium, lead and lead-bismuth eutectic; these designs utilize reactive and toxic materials at temperatures up to 1073 K for nuclear power plant operations and other similar applications. To simulate these systems with the actual coolant material requires a high level of safety systems. Use of these materials in university experimental laboratory settings is difficult due to the safety hazards and that lead (Pb) is a designated substance requiring special permission to use. Therefore, a less toxic and less reactive liquid metal that can be used to simulate liquid metal cooled flows will allow for a greater number of investigations and experimentation of liquid metal flow with regards to the field of thermal hydraulics. Good candidates for a liquid metal experimental fluid are alloys from the indium-bismuth-tin system such as Fields metal, which by weight percent is 51% indium, 32.5% bismuth and 16.5% tin and possesses a melting temperature of 333 K. However, the thermodynamic properties of Fields metal and similar alloys in their liquid state are not well described in literature. This work experimentally measures the specific heat of the eutectic alloys of theindium-bismuth-tin tertiary system using a differential scanning calorimeter technique and analyzes the results to determine if the thermodynamic properties of the system have sufficient scaling for experimental modeling applications. The results verify the melting temperatures of the alloys and establish a relationship between temperature and specific heat.

An energy minimizing score based optimal data gathering in wireless sensor networks

2018 ◽  
Vol 7 (2.31) ◽  
pp. 161
Author(s):  
P Balamurugan ◽  
M Shyamala Devi ◽  
V Sharmila
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Data Gathering ◽  
Residual Energy ◽  
Base Station ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Efficient Manner ◽  
High Level ◽  
The Impact

In wireless sensor networks, Sensor nodes are arranged randomly in unkind physical surroundings to collect data and distribute the data to the remote base station. However the sensor nodes have to preserve the power source that has restricted estimation competence. The sensed information is difficult to be transmitted over the sensor network for a long period of time in an energy efficient manner.  In this paper, it finds the problem of communication data between sink nodes and remote data sources via intermediate nodes in sensor field. So this paper proposes a score based data gathering algorithm in wireless sensor networks. The high-level contribution of this study is the enhancement of a score- based data gathering algorithm and the impact of energy entity for Wireless Sensor Networks.  Then the energy and delay of data gathering are evaluated. Unlike PEGASIS and LEACH, the delay for every process of data gathering is considerably lower when SBDG is employed.  The energy consumed per round of data gathering for both SBDG and EE-SBDG is less than half of that incurred with PEGASIS and LEACH. Compared with LEACH and PEGASIS, SBDG and EE-SBDG are fair with node usage because of the scoring system and residual energy respectively.  Overall, the Score-based data gathering algorithm provides a significant solution to maximize the network lifetime as well as minimum delay per round of data gathering.

scholarly journals A Performance Evaluation of a Notebook PC under a High Dose-Rate Gamma Ray Irradiation Test

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Jai Wan Cho ◽  
Kyung Min Jeong
Keyword(s):  
Performance Evaluation ◽  
Dose Rate ◽  
Nuclear Power ◽  
Gamma Ray ◽  
Control Unit ◽  
High Dose Rate ◽  
High Dose ◽  
Robot System ◽  
Irradiation Test ◽  
Gamma Ray Irradiation

We describe the performance of a notebook PC under a high dose-rate gamma ray irradiation test. A notebook PC, which is small and light weight, is generally used as the control unit of a robot system and loaded onto the robot body. Using TEPCO’s CAMS (containment atmospheric monitoring system) data, the gamma ray dose rate before and after a hydrogen explosion in reactor units 1–3 of the Fukushima nuclear power plant was more than 150 Gy/h. To use a notebook PC as the control unit of a robot system entering a reactor building to mitigate the severe accident situation of a nuclear power plant, the performance of the notebook PC under such intense gamma-irradiation fields should be evaluated. Under a similar dose-rate (150 Gy/h) gamma ray environment, the performances of different notebook PCs were evaluated. In addition, a simple method for a performance evaluation of a notebook PC under a high dose-rate gamma ray irradiation test is proposed. Three notebook PCs were tested to verify the method proposed in this paper.

scholarly journals Data Aggregation Scheme Using Multiple Mobile Agents in Wireless Sensor Network

2019 ◽  
Vol 8 (2S11) ◽  
pp. 3440-3447
Keyword(s):  
Data Aggregation ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Battery Life ◽  
Wireless Sensor Nodes ◽  
Power Sources ◽  
Itinerary Planning ◽  
Active Research ◽  
The Moment ◽  
High Level

Wireless Sensor Nodes (WSN) has restricted sensing, communication and computational capabilities, in addition, are mainly operated by means of batteries in a bad atmosphere with the non-replenish-able power sources. As Data aggregation (DA) has more significance in solving the chief limitations of utilizing WSNs, say, the restricted battery life of the powered sensors in addition to short-communication gamut of sensors, it becomes an active research domain today. Effectively gathering data has constantly been the principal significance in WSNs. Regarding the static sink, nodes next to the sink would encompass more loads for routing data, and consequently Mobile Agent (MA) has been commenced. At the moment, the MA could move itself to the sensor nodes (SN) for amassing the data. This MA has made the gathering and aggregation of data possible in a means that is suitable for instantaneous applications. This work proposes an effective DA Scheme in WSN that employs manifold MAs for aggregating data in addition to transferring it to the sink centred on Itinerary planning. This could well be attained by grouping the nodes in clusters as well as planning itineraries effectually amongst cluster heads (CHs) alone. In the proposed DA scheme, itinerary planning is performed utilizing Hybrid Ant Colony Optimization-Genetic Algorithm (ACO-GA). Ultimately, the sink sends the MAs for amassing data as of the CH. Simulation outcome confirms clearly that the proposed work shows high-level performance than the other traditional techniques.

scholarly journals Influence of Gamma Irradiation on Electric Cables Models: Study of Additive Effects by Mid-Infrared Spectroscopy

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1451
Author(s):  
Astrid Maléchaux ◽  
Juliette Colombani ◽  
Sandrine Amat ◽  
Sylvain R. A. Marque ◽  
Nathalie Dupuy
Keyword(s):  
Gamma Irradiation ◽  
Dose Rate ◽  
Nuclear Power ◽  
Degradation Products ◽  
Principal Component ◽  
High Dose Rate ◽  
Normal Operation ◽  
High Dose ◽  
Electric Cables ◽  
The Impact

Cables, especially their insulation and jacket materials made of polymers, are vulnerable to ageing degradation during normal operation. However, they must remain functional for the entire life of a nuclear power plant, or even in the event of an accident for cables with a safety requirement. This study focuses on models of crosslinked polyethylene (XLPE)-based insulation of cables and deals with the structure modification and the behavior of XLPE for nuclear applications due to the effect of additives. Various additives are added to the polymer formulation to evaluate their impact on ageing. The samples are irradiated at room temperature by several gamma doses, up to 374 kGy, with two dose rates (40 Gy/h and 300 Gy/h) and compared with a non-irradiated sample used as reference. To understand the impact of gamma irradiation on the materials, the principal component analysis (PCA) method is applied on spectra recorded through attenuated total reflectance–Fourier transform infrared (ATR-FTIR) spectroscopy. The results highlight the effects of ageing depending on the dose rate and on the formulation of the materials, with the identification of different degradation products. A curve resolution study compares the effects of different additives on polymer oxidation and shows that the low dose rate leads to a higher degradation than the high dose rate.

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