scholarly journals THE IMPROVEMENT OF LOW-WASTE TECHNOLOGIES OF WORKING BODY OF WATER PREPARATION AT THERMAL AND NUCLEAR POWER PLANTS

2017 ◽  
Vol 60 (4) ◽  
pp. 367-379
Author(s):  
K. D. Rymasheuskaya
Keyword(s):  
Water Treatment ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Negative Impact ◽  
Water Desalination ◽  
Hazardous Substances ◽  
Technological Scheme ◽  
Treatment Equipment ◽  
The One

In the present work the main directions of water desalination technologies improving have been analyzed. Possible techniques of high-quality treatment of water that enable the reduction of amounts of environmentally hazardous substances to be discharged into the hydrosphere are indicated. The purpose of the work was to improve the ecological efficiency and the effectiveness of water treatment equipment at heat power plants when designing new and the modernizing existing water treatment schemes. In order to achieve this goal the following problems have been solved: the one of analyzing the main directions of the improvement of technologies of working body of water preparation at thermal and nuclear power plants; of analyzing the main directions of reduction of total volume of highly mineralized power plant wastewaters; of developing the technological scheme of recycling of concentrate of membrane installations and regenerants of ionite filters in acid and alkali; of developing the technological scheme of transformation of the sludge in pre-processing waste into valuable commodity products. The results of research can be applied for the design of new and the modernization of existing water treatment installations of thermal and nuclear power plants. It will enable to reduce considerably the use of natural water and the amount of chemicals added as well as the volume of wastewater and the concentration of dissolved solids in it. As a consequence, the negative impact of thermal and nuclear power plants on the hydrosphere will be reduced. 

scholarly journals State-of-the-Art Water Treatment in Czech Power Sector: Industry-Proven Case Studies Showing Economic and Technical Benefits of Membrane and Other Novel Technologies for Each Particular Water Cycle

Membranes ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 98
Author(s):  
Jaromír Marek
Keyword(s):  
Water Treatment ◽  
Case Studies ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Water Cycle ◽  
Liquid Waste ◽  
Novel Technologies ◽  
Turbine Condensate ◽  
Common Cycles

The article first summarizes case studies on the three basic types of treated water used in power plants and heating stations. Its main focus is Czechia as the representative of Eastern European countries. Water as the working medium in the power industry presents the three most common cycles—the first is make-up water for boilers, the second is cooling water and the third is represented by a specific type of water (e.g., liquid waste mixtures, primary and secondary circuits in nuclear power plants, turbine condensate, etc.). The water treatment technologies can be summarized into four main groups—(1) filtration (coagulation) and dosing chemicals, (2) ion exchange technology, (3) membrane processes and (4) a combination of the last two. The article shows the ideal industry-proven technology for each water cycle. Case studies revealed the economic, technical and environmental advantages/disadvantages of each technology. The percentage of technologies operated in energetics in Eastern Europe is briefly described. Although the work is conceived as an overview of water treatment in real operation, its novelty lies in a technological model of the treatment of turbine condensate, recycling of the cooling tower blowdown plus other liquid waste mixtures, and the rejection of colloidal substances from the secondary circuit in nuclear power plants. This is followed by an evaluation of the potential novel technologies and novel materials.

scholarly journals La comunicación de crisis en el sector atómico: protocolo, características, y recomendaciones en eventos nucleares = Crisis communication in the atomic sector: protocol, characteristics, and recommendations in nuclear events

2019 ◽  
pp. 19
Author(s):  
Enrique Cobos Urbina ◽  
María José Recoder Sellarés
Keyword(s):  
Crisis Communication ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Energy ◽  
Nuclear Power Plants ◽  
Strategic Communication ◽  
Public Confidence ◽  
Social Legitimacy ◽  
The One ◽  
Nuclear Crisis

Resumen: Las centrales nucleares necesitan una comunicación organizada para los dos tipos de situaciones es­peciales a las que se enfrentan: por un lado, para informar a los stakeholders de lo que está ocurriendo en una crisis operativa; y por otra parte para recuperar la confianza pública en aquellos acontecimientos imprevistos que afectan a la reputación de la central y a la legitimidad social de la energía nuclear. ¿Qué características definen la comunicación de crisis nuclear? ¿Qué protocolo comunicativo se sigue en España en caso de un accidente o incidente nuclear? ¿Se tienen en cuenta las teorías de comunicación estratégica en períodos de crisis?Palabras clave: centrales nucleares; energía nuclear; comunicación de crisis; comunicación nuclear; España.Abstract: Nuclear power plants need an organized communication for the two types of special situations they face: on the one hand to inform relevant stakeholders of what is happening in an operational crisis; and on the other hand to recover public confidence in those unforeseen events that affect the reputation of the nuclear power plant and the social legitimacy of nuclear energy. What characteristics define nuclear crisis communication? What communicative protocol is followed in Spain in case of a nuclear accident or incident? Are the theories of strategic communication taken into account during periods of crisis?Keywords: nuclear power plants; nuclear energy; crisis communication; nuclear communication; Spain.

What can be learned from the French partial nuclear shutdown of 2016?

2021 ◽  
pp. 5-19
Author(s):  
Jacques Percebois ◽  
Stanislas Pommeret
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Large Scale ◽  
Negative Impact ◽  
Wholesale Price ◽  
Renewable Energies ◽  
Electricity Storage ◽  
The Impact ◽  
Storage Facilities

The penetration of intermittent renewable energies in the electricity mixes impact the wholesale price. In the absence of electricity storing capacities at reasonable costs, the back-up of the intermittent renewable energies is ensured by fossil or nuclear power plants. In 2016 the French Nuclear Safety Authority has ordered the shutdown of a large part of nuclear units for safety reasons. This paper analyses the impact of such a decision both on the evolution of the whole-sale price of electricity and on the French commercial balance. Although the resulting mix from the partial shutdown of the nuclear power plants was able to produce the electrical energy consumed, it was unable to keep up with demand. This has resulted in a very sharp increase in the price of electricity on the spot market and in massive electricity imports at peak times. Moreover the carbon electricity footprint produced in France is much lower than the one pro-duced by its neighbors. Consequently, the nuclear partial shutdown has a negative climatic impact resulting in a deterioration of the citizen welfare. Thus, the French experience of 2016 teaches us that in the absence of electricity storage facilities, there is no point in trying to re-duce the share of nuclear and fossil fuels in the electricity mix. If the policymakers want to do so, they must ensure that massive electricity storage facilities are present and promote electrici-ty demand flexibility on a large scale. This study highlights also the divergence that can exist between the interest of the nuclear producer (higher revenues) and the collective interest (lower welfare and negative impact on the trade balance).

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