Radiography Inspection Technology of CPR1000 Nuclear Power Unit Pressurizer

2014 ◽  
pp. 539-544
Author(s):  
Jingyun Hao ◽  
Dong Deng ◽  
Jing Wang ◽  
Shuangyin Wang ◽  
Xiongfei Hua
Keyword(s):  
Power Unit ◽  
Nuclear Power ◽  
Nuclear Power Unit

scholarly journals Operating characteristics and peak regulation capability of AP1000 nuclear power unit

2021 ◽  
Vol 714 (4) ◽  
pp. 042033
Author(s):  
Yongqiang Che ◽  
Yisen Chen ◽  
Fengcai Zheng ◽  
Junshan Guo ◽  
Panfeng Shang
Keyword(s):  
Power Unit ◽  
Nuclear Power ◽  
Operating Characteristics ◽  
Nuclear Power Unit

Research on Negative Pressure Control Technology in NPP Reactor Building and its Application

2013 ◽  
Author(s):  
Jianghong Xie
Keyword(s):  
Power Unit ◽  
Negative Pressure ◽  
Nuclear Power ◽  
Pressure Control ◽  
Control Technology ◽  
Annular Space ◽  
Pressure System ◽  
Nuclear Power Unit ◽  
Reactor Building ◽  
Double Wall

The paper mainly elaborates the negative pressure control technology and commissioning approaches for double-wall containment of Russian WWER-1000 nuclear power units. It also carries out an analysis and research on the layered negative pressure technology in the containment. It mainly includes the following three parts: A Russian WWER-1000 nuclear power unit adopts the structure of double-wall containment for its Reactor building, with independent negative pressure systems for the containment and the annular space between the two walls. The paper mainly elaborates the control methods and limits requirements for the negative pressure in the containment and the annular space under the normal operation condition and in case of design basis accidents, with analysis and argumentation on the design function and operation requirements of the negative pressure system for the containment and the annular space. In the paper, the design philosophy of layered negative pressure and its feasibility study are analyzed from the aspects of radiated partition, air distribution of the negative pressure system and containment separator for layered negative pressure. The commissioning methods and technical requirements of negative pressure system in the Reactor building are described in the paper. Problems encountered during commissioning are also addressed and analyzed. Operations practices prove that the negative pressure control technology for double-wall containment of WWER-1000 nuclear power unit is advanced and reliable, which meets the requirements on nuclear air decontamination emission and radiation protection, and is worthy of study, research and reference.

scholarly journals Modeling of flexible nuclear power unit operational modes in the mathematical model of the Ukraine’s power system daily electric load profile dispatching

2021 ◽  
Vol 2021 (1) ◽  
pp. 29-37
Author(s):  
T.P. Nechaieva ◽  
Keyword(s):  
Mathematical Model ◽  
Power System ◽  
Power Unit ◽  
Nuclear Power ◽  
Storage Systems ◽  
Electric Load ◽  
Load Profile ◽  
Load Rate ◽  
Nuclear Power Unit ◽  
The Mathematical Model

The use of large amounts of existing baseload NPPs capacities with a significant increase in renewable generation in the mathematical model of optimal dispatching of generating capacities of Ukraine’s power system leads to a significant surplus of electricity during peak power generation at solar PV’s, which necessitates additional sources of flexibility of the power system, such as battery electricity storage systems. The projects of new advanced nuclear power units provide for their use in flexible load modes with a maximum unloading of up to 50% of the rated capacity. Advanced NPP power units with small modular reactors are designed for even greater more maneuverable operation with possible unloading of up to 20% of rated capacity. The article presents approaches to modeling the use of NPP power units in variable load modes in the mathematical model of the optimal daily load schedule dispatching of Integrated Power System of Ukraine. The first approach is to model the operation of NPP power units similar to modeling the participation of cycling TPP units in covering the daily electrical load profile of the power system, in particular, changes in generation power in the range from minimum to nominal load levels, load rate. The second approach is to determination for each nuclear power unit of variants of modes of their hourly loading, the choice of one of which is made as a result of optimization. The modeling results showed that the choice of optimal flexible loading modes of new nuclear power units allows to provide the load balance of the power system almost completely with available capacities, including cycling TPP units, and the use of pump-storage generating units to transfer excess PV generation at peak hours of electricity consumption, which avoids the use of battery storage systems. Keywords: mathematical model of dispatching, operational mode, nuclear power unit, daily electric load profile, power system

scholarly journals IMPROVING THE EFFICIENCY OF THE UNIT OF THE ZAPORIZHZHIA NPP WITH A WWER-1000 REACTOR

2020 ◽  
pp. 135-139
Author(s):  
A.A. Cheilytko ◽  
А.V. Karpenko ◽  
S.V. Ilin
Keyword(s):  
Water Temperature ◽  
Power Unit ◽  
Nuclear Power ◽  
Power Reactor ◽  
Cooling Water ◽  
Nuclear Power Reactor ◽  
Nuclear Power Unit ◽  
Turbine Installation ◽  
Physical Calculation

Improving the efficiency of the unit of the Zaporizhzhia NPP with a WWER-1000 reactor, by reducing the water temperature at the inlet to the condenser. The work describes the description of the NPP and the nuclear power reactor WWER-1000, by reducing the water temperature at the inlet to the condenser. Detailed neutron-physical calculation of the nuclear power unit with WWER-1000 reactor with a turbine installation K-1000-60/3000. The influence of the temperature of cooling water on the input to the capacitor and the load on the efficiency of the turbine installation and the flow of steam and heat to the turbine installation is established.

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