scholarly journals A reliability engineering study for a near surface radioactive waste repository using genetic algorithm

2010 ◽  
Author(s):  
L. A. Aguiar ◽  
V. C. Damaso
Keyword(s):  
Genetic Algorithm ◽  
Radioactive Waste ◽  
Reliability Engineering ◽  
Near Surface ◽  
Radioactive Waste Repository ◽  
Engineering Study ◽  
Waste Repository

Long-Term Safety Assessment of a (Near-Surface) Short-Lived Radioactive Waste Repository in Lithuania

2008 ◽  
Vol 161 (2) ◽  
pp. 156-168 ◽  
Author(s):  
J. Mazeika ◽  
R. Petrosius ◽  
V. Jakimaviciute-Maseliene ◽  
D. Baltrunas ◽  
K. Mazeika ◽  
...  
Keyword(s):  
Radioactive Waste ◽  
Safety Assessment ◽  
Near Surface ◽  
Radioactive Waste Repository ◽  
Waste Repository

scholarly journals On release of radionuclides from a near-surface radioactive waste repository to the environment

Nukleonika ◽  
2015 ◽  
Vol 60 (3) ◽  
pp. 551-555 ◽  
Author(s):  
Arūnas Gudelis ◽  
Inga Gorina
Keyword(s):  
Radioactive Waste ◽  
Groundwater Level ◽  
Unsaturated Zone ◽  
Human Exposure ◽  
Activity Concentration ◽  
Decay Product ◽  
Near Surface ◽  
Radioactive Waste Repository ◽  
Level Data ◽  
Waste Repository

Abstract A closed near-surface radioactive waste repository is the source of various radionuclides causing the human exposure. Recent investigations confirm an effectiveness of the engineering barriers installed in 2006 to prevent the penetration of radionuclides to the environment. The tritium activity concentration in groundwater decreased from tens of kBq/l to below hundreds of Bq/l. The monitoring and groundwater level data suggest the leaching of tritium from previously contaminated layers of unsaturated zone by rising groundwater while 210Pb may disperse as a decay product of 226Ra daughters.

Dose Assessment of Personnel Handling Conditioned Radioactive Waste

2009 ◽  
Author(s):  
Michal Pa´nik ◽  
Matej Zachar ◽  
Vladimi´r Necˇas
Keyword(s):  
Reinforced Concrete ◽  
Radioactive Waste ◽  
Calculated Data ◽  
Dose Assessment ◽  
Fibre Reinforced Concrete ◽  
Planning Tool ◽  
Near Surface ◽  
Radioactive Waste Repository ◽  
Dose Monitoring ◽  
Waste Repository

Radioactive waste may arise throughout the lifetime of any type of nuclear facility. This waste has to be isolated from the environment using the engineered and natural barriers of near surface or deep geological radioactive waste repository. Before final disposal, the waste volume is reduced in the treatment process and then it is immobilized into the stable matrix. In Slovakia, the treated radioactive waste is conditioned into fibre-reinforced concrete containers using a cementation technology. These containers are the only overpacks approved for near surface disposal in the National Radioactive Waste Repository located at Mochovce nuclearsite (Slovakia). Every filled container has to fulfill the defined limits and conditions for safe transport and disposal. The dose parameters, determining the safety of personnel handling a container, are one of them. Basically, the doses are measured on the container walls’ outer surfaces and on the lid of the container. The dose monitoring in 1 meter distance from the container walls and from the lid of the container is performed before transportation as well. The calculation code VISIPLAN 3D ALARA is a planning tool and it calculates dose parameters also for the above mentioned positions concerning the fibre-reinforced concrete container which contains waste with different physical or radiological characteristics. In the paper, calculated data are compared with in-situ measurements. Using VISIPLAN 3D ALARA planning tool, various scenarios are evaluated. Finally, the optimization leading to the lowest radiation exposure of personnel handling the filled fibre-reinforced containers is discussed.

scholarly journals Locating a radioactive waste repository in the ring of fire

Eos ◽  
2004 ◽  
Vol 85 (45) ◽  
pp. 465-471 ◽  
Author(s):  
Mick Apted ◽  
Kelvin Berryman ◽  
Neil Chapman ◽  
Mark Cloos ◽  
Chuck Connor ◽  
...  
Keyword(s):  
Radioactive Waste ◽  
Radioactive Waste Repository ◽  
Waste Repository
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