Abstract
Atmospheric dispersion modeling and radiation dose calculations have been performed for a hypothetical AP1000 SGTR accident by HotSpot code 3.03. TEDE, the respiratory time-integrated air concentration, and the ground deposition are calculated for various atmospheric stability classes, Pasquill stability categories A–F with site-specific averaged meteorological conditions. The results indicate that the maximum plume centerline ground deposition value of1.2E+2 kBq/m2occurred at about 1.4 km and the maximum TEDE value of1.41E-05 Sv occurred at 1.4 km from the reactor. It is still far below the annual regulatory limits of 1 mSv for the public as set in IAEA Safety Report Series number 115. The released radionuclides might be transported to long distances but will not have any harmful effect on the public.
Highlights
Radiation dose calculation for hypothetical accident or possible radionuclides release from a nuclear facility is very important as far as human health and safety are concerned [1,2,3]
total effective dose equivalent (TEDE), the respiratory timeintegrated air concentration, and the ground deposition are calculated by HotSpot 3.03 as a function of downwind distance is presented in Tables 2 and 3
Afterwards, the TEDE decreased with the increase of the distance and the rate of decline slowed down gradually until the value has fallen to a very low level
Summary
Radiation dose calculation for hypothetical accident or possible radionuclides release from a nuclear facility is very important as far as human health and safety are concerned [1,2,3]. The radionuclides from accidental releases producing the dose equivalent may be external or internal to the body. The computer code HotSpot is used to calculate the TEDE after the hypothetical accident. The HotSpot code uses a Gaussian plume model (GPM) to calculate the air concentration and TEDE from nuclides release to the atmosphere [4]. GPM is one of the most widely validated models and its applications have been reported in many areas [1, 2, 5,6,7]
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