Thermionic Fuel Element for High-Voltage Thermionic Nuclear Power Plant

1994 ◽  
Author(s):  
Yuri V. Nikolaev ◽  
Alexander V. Vasilchenko ◽  
Stanislav A. Eryomin ◽  
Nikolai V. Lapochkin ◽  
Mohamed S. El-Genk ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Fuel Element ◽  
High Voltage ◽  
Nuclear Power ◽  
Thermionic Nuclear Power

What Could Have Saved Fukushima From Its Severe Accident

2018 ◽  
Author(s):  
Kenji Iino ◽  
Ritsuo Yoshioka ◽  
Masao Fuchigami ◽  
Masayuki Nakao
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
High Voltage ◽  
Nuclear Power ◽  
Radioactive Material ◽  
Severe Accident ◽  
Study Group ◽  
Tsunami Waves ◽  
Ac Power ◽  
Fukushima Daiichi

The Great East Japan Earthquake on March 11, 2011 triggered huge tsunami waves that attacked Fukushima Daiichi Nuclear Power Plant (Fukushima-1). Units 1, 3, and 4 had hydrogen explosions. Units 1, 2, and 3 had core meltdowns and released a large amount of radioactive material. Published investigation reports did not explain how the severity of the accident could have been prevented. We formed a study group to find what preparations at Fukushima-1 could have avoided the severity of the accident. We concluded that the severity could have been avoided if the plant had prepared a set of equipment, and had exercised actions to take against such tsunami. Necessary preparation included (1) A number of DC batteries, (2) Portable underwater pumps, (3) Portable AC generators with sufficient gasoline supply, (4) High voltage AC power trucks, and (5) Drills against extended loss of all electric power and seawater pumps. The most important preparation was item (5), i.e., to study plans and carry out exercises against huge tsunami. That alone would have identified all other necessary preparations.

scholarly journals The Research of High Voltage Auxiliary Power System Neutral Point Grounding Modes between the Nuclear Power Plant and Conventional Fossil Fuel Power Plant

2015 ◽  
Vol 4 (4) ◽  
pp. 15
Author(s):  
Yunfeng Zhang ◽  
Hourong Pan
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Power System ◽  
High Voltage ◽  
Nuclear Power ◽  
Power Plants ◽  
Fossil Fuel ◽  
Neutral Point ◽  
Auxiliary Power ◽  
Fossil Fuel Power Plant

<p>Currently, in power plants, the application of the extinction coil in high voltage auxiliary power system neutral point is less experienced. A research done on nuclear power plant and conventional fossil fuel power plant proved that using an auxiliary power system’s different characteristics was leading to different demands of the grounding modes. Thus, this research was done by selecting the grounding mode of high voltage auxiliary power system neutral point on the main nuclear power plants and the partial fossil fuel power plants together with the calculation of practical engineering, and optimal design schemes. The high voltage auxiliary power system neutral point grounding modes have been induced in the large-scale into the nuclear power plant and the conventional fossil fuel power plant. Methods in determining the neutral point grounding modes are used by analyzing the principles commonly used grounding modes and requirements of related codes. First, choose the suitable grounding mode according to the calculation result of capacitive current. Then, choose more conducive grounding mode to the operation of power plant according to the operation of technology equipment. The power is required from the configuration, connection of auxiliary power and the cut from the accident of auxiliary power. As some power plants which are under-construction will be putting into operation one after another, the whole set of perfect security arrangements and operating experiences will also be accumulated inevitably. As a conclusion, high voltage auxiliary power system neutral point grounding modes directly affect the running of the auxiliary power system and even affect the security of the nuclear safety and the operation of the power plant. I hope this article can play a role for reference on the selection of the auxiliary power system grounding modes.</p>

scholarly journals The Research of High Voltage Auxiliary Power System Neutral Point Grounding Modes between the Nuclear Power Plant and Conventional Fossil Fuel Power Plant

2015 ◽  
Vol 4 (4) ◽  
pp. 15
Author(s):  
Yunfeng Zhang ◽  
Hourong Pan
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Power System ◽  
High Voltage ◽  
Nuclear Power ◽  
Power Plants ◽  
Fossil Fuel ◽  
Neutral Point ◽  
Auxiliary Power ◽  
Fossil Fuel Power Plant

<p>Currently, in power plants, the application of the extinction coil in high voltage auxiliary power system neutral point is less experienced. A research done on nuclear power plant and conventional fossil fuel power plant proved that using an auxiliary power system’s different characteristics was leading to different demands of the grounding modes. Thus, this research was done by selecting the grounding mode of high voltage auxiliary power system neutral point on the main nuclear power plants and the partial fossil fuel power plants together with the calculation of practical engineering, and optimal design schemes. The high voltage auxiliary power system neutral point grounding modes have been induced in the large-scale into the nuclear power plant and the conventional fossil fuel power plant. Methods in determining the neutral point grounding modes are used by analyzing the principles commonly used grounding modes and requirements of related codes. First, choose the suitable grounding mode according to the calculation result of capacitive current. Then, choose more conducive grounding mode to the operation of power plant according to the operation of technology equipment. The power is required from the configuration, connection of auxiliary power and the cut from the accident of auxiliary power. As some power plants which are under-construction will be putting into operation one after another, the whole set of perfect security arrangements and operating experiences will also be accumulated inevitably. As a conclusion, high voltage auxiliary power system neutral point grounding modes directly affect the running of the auxiliary power system and even affect the security of the nuclear safety and the operation of the power plant. I hope this article can play a role for reference on the selection of the auxiliary power system grounding modes.</p>

scholarly journals Conceptual Engineering of CARA Fuel Element with Negative Void Coefficient for Atucha II

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
H. Lestani ◽  
P. Florido ◽  
J. González
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Fuel Element ◽  
Power Density ◽  
Nuclear Power ◽  
Conceptual Level ◽  
Conceptual Engineering ◽  
Design Basis ◽  
Enriched Uranium ◽  
Reactivity Coefficient

Experimentally validated void reactivity calculations were used to study the feasibility of a change in the design basis of Atucha II Nuclear Power Plant including the Large LOCA event. The use of CARA fuel element with burnable neutronic absorbers and enriched uranium is proposed instead of the original fuel. The void reactivity, refuelling costs, and power peaking factors are analysed at conceptual level to optimize the burnable neutronic absorber, the enrichment grade, and their distribution inside the fuel. This work concludes that, for the considered plant conditions, either a void reactivity coefficient granting no prompt critical excursion on Large LOCA or negative void reactivity is achievable, with advantages on refuelling cost and linear power density.

Thermophysical characteristics of A VV�R-1000 fuel element in the fifth power unit of the novo voronezh nuclear power plant

Atomic Energy ◽  
1993 ◽  
Vol 74 (5) ◽  
pp. 418-420
Author(s):  
A. S. Shcheslov ◽  
V. N. Proselkov ◽  
Yu. K. Bibilashvili ◽  
L. L. Malanchenko ◽  
V. D. Onufriev ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Fuel Element ◽  
Power Unit ◽  
Nuclear Power ◽  
Thermophysical Characteristics
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