Impact of Large Cooling Tower on Atmospheric Dispersion of Effluent from Coastal Nuclear Power Plant

2020 ◽  
Vol 103 (sp1) ◽  
pp. 474
Author(s):  
Xuan Wang ◽  
Guoliang Wei ◽  
Shaowei Wang ◽  
Yang Yang ◽  
Fenglei Du ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Cooling Tower ◽  
Atmospheric Dispersion

Estimation of Radiological Consequences at a Proposed Nuclear Power Plant Site Using Atmospheric Dispersion Code

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Kwame Gyamfi ◽  
Sylvester Attakorah Birikorang ◽  
Emmanuel Ampomah-Amoako ◽  
John Justice Fletcher
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Atmospheric Dispersion ◽  
Atmospheric Stability ◽  
Assessment System ◽  
Severe Accident ◽  
Dispersion Modeling ◽  
Stability Class ◽  
Total Effective Dose Equivalent

Abstract Atmospheric dispersion modeling and radiation dose calculation have been performed for a generic 1000 MW water-water energy reactor (VVER-1000) assuming a hypothetical loss of coolant accident (LOCA). Atmospheric dispersion code, International Radiological Assessment System (InterRAS), was employed to estimate the radiological consequences of a severe accident at a proposed nuclear power plant (NPP) site. The total effective dose equivalent (TEDE) and the ground deposition were calculated for various atmospheric stability classes, A to F, with the site-specific averaged meteorological conditions. From the analysis, 3.7×10−1 Sv was estimated as the maximum TEDE corresponding to a downwind distance of 0.1 km within the dominating atmospheric stability class (class A) of the proposed site. The intervention distance for evacuation (50 mSv) and sheltering (10 mSv) were estimated for different stability classes at different distances. The intervention area for evacuation ended at 0.5 km and that for sheltering at 1.5 km. The results from the study show that designated area for public occupancy will not be affected since the estimated doses were below the annual regulatory limits of 1 mSv.

scholarly journals Wind Tunnel Experiment for Predicting a Visible Plume Region from a Nuclear Power Plant Cooling Tower

2014 ◽  
Vol 53 (2) ◽  
pp. 234-241 ◽  
Author(s):  
Dong-Peng Guo ◽  
Ren-Tai Yao ◽  
Dan Fan
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Wind Tunnel ◽  
Flow Field ◽  
Turbulence Intensity ◽  
Nuclear Power ◽  
Cooling Tower ◽  
Wind Tunnel Experiment ◽  
Plume Rise ◽  
Plume Region

AbstractThis paper introduces a wind tunnel experiment to study the effect of the cooling tower of a nuclear power plant on the flow and the characteristics of visible plume regions. The relevant characteristics of the flow field near the cooling tower, such as the plume rise and the visible plume region, are compared with the results of previous experimental data from Électricité de France (EDF) and the Briggs formulas. The results show that the wind tunnel experiment can simulate the top backflow of the cooling tower and the rear cavity regions among others. In the near-wake region, including the recirculation cavity, mean velocity decreases and turbulence intensity increases significantly. The maximum turbulence intensity observed is 0.5. In addition, the disturbed flow extent of the cooling tower top reaches 1.5 times the cooling tower height. Analysis of the visible plume region shows that the wind tunnel experiment can simulate the variation of a visible plume region. The results are consistent with the wind tunnel experiment of EDF. Moreover, the plume rise analysis shows that the wind tunnel experiment data are in agreement with the Briggs formulas for 50–200 m. As a whole, the proposed wind tunnel experiment can simulate the flow field variation of the visible plume region and the plume rise around the buildings with reasonable accuracy.

Variance of Atmosphere Dispersion Factor for Accident Release from Nuclear Power Plant

2012 ◽  
Vol 518-523 ◽  
pp. 1242-1246 ◽  
Author(s):  
Rui Ping Guo ◽  
Chun Lin Yang
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Probability Distribution ◽  
Wind Direction ◽  
Nuclear Power ◽  
Power Plants ◽  
Atmospheric Dispersion ◽  
Radioactive Material ◽  
The Difference ◽  
Release Height

The growing concern over the effect of atmosphere dispersion resulted from radioactive material was noticeable. This paper demonstrated the variance of atmosphere dispersion factor for accident release from nuclear power plant through running PAVAN (Atmospheric Dispersion of Radioactive Releases from Nuclear Power Plants) model. Also, we investigated the effect of release height (short for H) on atmosphere dispersion factor and compared the correlation between atmosphere dispersion factor and dispersion distance. Our results showed that atmosphere dispersion factor would descend with increased release height. As dispersion distance increasing, the tendency of atmosphere dispersion factor expressed complicated status caused by the difference of wind direction. It was illustrated that the phenomena was caused by the integrated action between the wind direction and release height. The probability distribution of atmosphere dispersion factor also validated that the distribution was depend on the wind direction. Probability analysis indicated that the atmosphere dispersion factor under H=100m was overall less than that under H=75m.

Atmospheric Dispersion and Deposition of Radionuclides from the Fukushima Daiichi Nuclear Power Plant Accident

Elements ◽  
2012 ◽  
Vol 8 (3) ◽  
pp. 195-200 ◽  
Author(s):  
A. Mathieu ◽  
I. Korsakissok ◽  
D. Quelo ◽  
J. Groell ◽  
M. Tombette ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Atmospheric Dispersion ◽  
Nuclear Power Plant Accident ◽  
Fukushima Daiichi

scholarly journals Global risk from the atmospheric dispersion of radionuclides by nuclear power plant accidents in the coming decades

2013 ◽  
Vol 13 (11) ◽  
pp. 30287-30309 ◽  
Author(s):  
T. Christoudias ◽  
Y. Proestos ◽  
J. Lelieveld
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
General Circulation ◽  
Nuclear Power ◽  
Power Plants ◽  
Atmospheric Dispersion ◽  
Circulation Model ◽  
Global Risk ◽  
The Usa ◽  
Under Construction

Abstract. We estimate the global risk from the release and atmospheric dispersion of radionuclides from nuclear power plant accidents using the EMAC atmospheric chemistry–general circulation model. We included all nuclear reactors that are currently operational, under construction and planned or proposed. We implemented constant continuous emissions from each location in the model and simulated atmospheric transport and removal via dry and wet deposition processes over 20 yr (2010–2030), driven by boundary conditions based on the IPCC A2 future emissions scenario. We present global overall and seasonal risk maps for potential surface layer concentrations and ground deposition of radionuclides, and estimate potential dosages to humans from the inhalation and the exposure to ground deposited radionuclides. We find that the risk of harmful doses due to inhalation is typically highest during boreal winter due to relatively shallow boundary layer development and reduced mixing. Based on the continued operation of the current nuclear power plants, we calculate that the risk of radioactive contamination to the citizens of the USA will remain to be highest worldwide, followed by India and France. By including stations under construction and those that are planned and proposed our results suggest that the risk will become highest in China, followed by India and the USA.

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