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Studying the Impact of a Nuclear-Powered Naval Ship Severe Accident on Aquatic Biota using Resrad Code |
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PP: 39- 44 |
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doi:10.18576/jrna/060106
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Author(s) |
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E.F. Salem,
W.F.Bakr,
Asmaa K. Abdien,
F.S.Tawfik,
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Abstract |
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| Naval ships are designed to function under very difficult circumstances. The most common cases of nuclear ship incidents/accidents are collisions, problems with the nuclear power reactor, groundings, fires and explosions as well as leaks in the sea-water systems of submarines. Accidental release to air caused by criticality or core melt is considered a real radiological hazard. This study consists of two parts; first part aims at estimating the core inventory of the suggested accident due to melting of nuclear fuel in the ships power reactor using a Radiological Assessment System for Consequence Analysis (RASCAL) code. The behavior control of accidental released radionuclides on surface water body was calculated using mathematical equation. The radionuclides concentrations which have been evaluated in the marine environment are 241Am, 239Pu, 137Cs, 90Sr, and 131I. In the second part: The aquatic biota dose rate was evaluated using the RESRAD-BIOTA code. The radiological impact assessment of accidental releases of 90Sr and 137Cs to marine biota was found to be high. It is higher than International Commission on Radiation Protection (ICRP) dose limit by a factor about 103 for 100 m and by factor ten over the 4 km from the release point. Also, the radiological impact of accidental release of 131I to marine biota increases by factor 104 at 100 m and by factor ten for 4 km from release point. |
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