Research on Cooling Water Source Safety Measures in Water Intake Engineering of Coastal NPP

2021 ◽  
Author(s):  
TANG Benjing ◽  
Li Jing
Keyword(s):  
Water Intake ◽  
Cooling Water ◽  
Water Source ◽  
Safety Measures

Research on Cooling Water Source Safety Measures in Water Intake Engineering of Coastal NPP

2020 ◽  
Author(s):  
Tang Ben-jing ◽  
Hou Shu-qiang ◽  
Wang Yan-long ◽  
Li Jing
Keyword(s):  
Water Intake ◽  
Model Test ◽  
Optimization Design ◽  
Cooling Water ◽  
Water Source ◽  
Physical Model Test ◽  
Wave Flow ◽  
Stable Operation ◽  
The Impact ◽  
Shell Debris

Abstract In view of the situation that large amounts of marine sewage and organisms enter into the cooling water intake system of a coastal NPP at BeiBu-bay, China, which affects the safe and stable operation of NPP, the optimization research on blockage prevention in the water intake engineering is carried out. Based on the statistical analysis of a large number of NPPs’ cooling water source safety incidents globally, the hydraulic characteristics of shell debris in water-intake open channel are studied first, and the source of shell debris in the drum filter at the water intake pump room is analyzed. Secondly, the water intake layout project scheme is optimized through the wave model test, which can effectively improve the wave cover in the water intake channel. At last, through the wave physical model test, the overall force of the network is studied under the combined action of wind, wave, flow and sewage, and the anchoring foundation which can guarantee the stable operation of the trash-intercepting network is optimized. By carrying out the optimization design of water intake engineering, reducing the waves in channel, reducing the possibility of marine sewage and organisms entering the channel, adding the trash-intercepting network facilities and forming effective cover. It can not only effectively avoid or reduce the impact of marine sewage and organisms on the cooling water source safety of NPPs, but also minimize the loss of marine organisms during the operation of NPPs.

The Design of Water Intake System and Analysis of Water Quality Conditions of the Regional Energy System of Complex River Water Source Heat Pump

2015 ◽  
Vol 8 (1) ◽  
pp. 38-42
Author(s):  
Pengfei Si ◽  
Xiangyang Rong ◽  
Angui Li ◽  
Xiaodan Min ◽  
Zhengwu Yang ◽  
...  
Keyword(s):  
Water Quality ◽  
Energy Consumption ◽  
River Water ◽  
Heat Pump ◽  
Water Intake ◽  
Water Source ◽  
Energy System ◽  
Sediment Concentration ◽  
Regional Energy ◽  
Heat Pump Unit

As a realization of the energy cascade utilization, the regional energy system has the significant potential of energy saving. As a kind of renewable energy, river water source heat pump also can greatly reduce the energy consumption of refrigeration and heating system. Combining the regional energy and water source heat pump technology, to achieve cooling, heating and power supply for a plurality of block building is of great significance to reduce building energy consumption. This paper introduces a practical engineering case which combines the regional energy system of complex river water source heat pump, which provides a detailed analysis of the hydrology and water quality conditions of the river water source heat pump applications, and discusses the design methods of water intake and drainage system. The results show that the average temperature of cold season is about 23.5 °C, the heating season is about 13.2 °C; the abundant regional water flow can meet the water requirement of water source heat pump unit; the sediment concentration index cannot meet the requirement of river water source heat pump if the water enters the unit directly; the river water chemistry indicators (pH, Cl-, SO42-, total hardness, total iron) can meet the requirement of river water source heat pump, and it is not required to take special measures to solve the problem. However, the problem of sediment concentration of water must be solved.

scholarly journals Identification and management of microbial contaminations in a surface drinking water source

2007 ◽  
Vol 5 (S1) ◽  
pp. 67-79 ◽  
Author(s):  
J. Åström ◽  
T. J. R. Pettersson ◽  
T. A. Stenström
Keyword(s):  
Drinking Water ◽  
Water Intake ◽  
Surface Waters ◽  
Microbial Contamination ◽  
Water Source ◽  
Drinking Water Source ◽  
Raw Water ◽  
Indicator Organisms ◽  
E Coli ◽  
The City

Microbial contamination of surface waters constitutes a health risk for drinking water consumers which may be lowered by closing the raw water intake. We have evaluated microbial discharge events reported in the river Göta älv, which is used for raw water supply to the city of Göteborg. Elevated levels of faecal indicator bacteria were observed during periods of closed raw water intake. High bacteria levels were, however, also occasionally detected during periods of open intake, probably as a result of microbial discharge far upstream in the river which may be difficult to predict and manage by closing the intake. Accumulated upstream precipitations, resulting in surface runoff and wastewater contaminations in the catchment, correlated positively with the levels of total coliforms, E. coli, intestinal enterococci and sulfite-reducing clostridia. Levels of faecal indicator organisms were negatively correlated to the water temperature due to enhanced survival at lower temperatures. Wastewater discharges from a municipality located just upstream of the water intake resulted in elevated E. coli concentrations downstream at the raw water intake for Göteborg. To improve the prediction of microbial contaminations within the river Göta älv, monitoring data on turbidity and upstream precipitation are of particular importance.

scholarly journals Research on Security Defence System of Cooling Water Source in Nuclear Power Plant

2020 ◽  
Vol 1549 ◽  
pp. 052003
Author(s):  
Qiaojun Wu ◽  
Guangchu He ◽  
Hongyong Wen ◽  
Xinpeng Lin ◽  
Shengliang He ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Cooling Water ◽  
Water Source ◽  
Defence System

scholarly journals Study on Cooling Water Source Seawater Filtration System of Nuclear Power Plant

2020 ◽  
Vol 514 ◽  
pp. 042014
Author(s):  
Qiaojun Wu ◽  
Guangchu He ◽  
Hongyong Wen ◽  
Xinpeng Lin ◽  
Shengliang He ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Cooling Water ◽  
Water Source ◽  
Filtration System

Heat Sink Issue: A Specific Safety Issue for NPP Site Selection and Evaluation in the Warm Countries With Extreme Climatic Conditions

2013 ◽  
Author(s):  
Andrei Rodionov ◽  
Jean-Marie Mattei
Keyword(s):  
Site Selection ◽  
Heat Sink ◽  
Cold Water ◽  
Safety Issue ◽  
Cooling Water ◽  
Water Source ◽  
Climatic Conditions ◽  
Spent Fuel ◽  
Regulatory Review ◽  
Human Environment

One of the major issues during the site selection and design of a NPP is the heat sink issue, i.e. installation and availability of reliable and efficient recipient of heat (air, water or both of them) in relation in particular with: • waste the heat removed from the condenser of the turbines during normal operational state, • waste the heat removed from all of the safety-related and non-safety-related equipment and systems during normal operational state, • waste the residual heat removed from nuclear reactor fuel (situated in reactor vessel or tubes), the decay heat removed from nuclear spent fuel (situated in spent fuel pool), and the heat removed from all of the safety-related equipment and systems during abnormal operational state and accident conditions. There are several “newcomer” countries that are situated in warm climate zones. In such countries, the cooling water design could be a challenge with regards to extreme water and air temperatures, air humidity, absence of an important reliable cold water source inside the country, etc. In addition, some specific items related to natural, industrial and human environment should be considered during the site evaluation, as for example, risk of intensive biota development, oil spills, siltation, low water level events, etc. This requires particular consideration of the heat sink issue for the site regulatory review during the licensing process. The article discusses the methodology for site regulatory review with regards to the heat sink issue and provides some practical advises on safety assessment and acceptance criteria to be considered.

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