Determination of Radioactive Materials in Water

2009 ◽  
pp. 22-22-11
Author(s):  
Franklin B. Barker
Keyword(s):  
Radioactive Materials

Determination of naturally occurring radioactive materials (NORM) in formation water during oil exploration

2009 ◽  
Vol 283 (1) ◽  
pp. 3-7 ◽  
Author(s):  
F. Moatar ◽  
S. R. Shadizadeh ◽  
A. R. Karbassi ◽  
E. Ardalani ◽  
R. Akbari Derakhshi ◽  
...  
Keyword(s):  
Oil Exploration ◽  
Formation Water ◽  
Radioactive Materials ◽  
Naturally Occurring ◽  
Naturally Occurring Radioactive Materials

RTS - 1 - Galilei Decommissioning Project

2003 ◽  
Author(s):  
A. Boschi ◽  
E. Cimini ◽  
F. Pagni ◽  
L. Parracone ◽  
M. Pocai ◽  
...  
Keyword(s):  
Research Reactor ◽  
Thermal Flux ◽  
Spent Fuel ◽  
Radiological Risk ◽  
Radioactive Materials ◽  
Thermal Output ◽  
Protective Custody ◽  
First Time ◽  
Waste Characterisation

The RTS-1 “Galileo Galilei” is an open pool research reactor light water moderated and cooled. It had a maximum thermal output of 5 MWth and an average thermal flux of 5 E+13 n/cm2sec. It became critical for the first time on April 1963 and it was definitely shutdown in March 1980. The reactor is situated at CISAM (Joint Centre of Studies and Military Application - Italian Ministry of Defence), S. Piero a Grado, Pisa, Italy, and its decommissioning is in progress. In this paper the strategy adopted to achieve the green status of the reactor site is discussed, with particular attention on the different steps to be done according to the national laws. Emphasis is placed on the characteristics of two different conditions required, namely Passive Protective Custody, which is a step necessary to allow the decay of the radioactive materials present into the plant to decrease the radiological risk to operate safely, and Unconditioned Release, in which all the materials can be released without radiological restrictions. Another aspect discussed in this paper is the effort spent on the determination of the radioisotopic abundance of the reactor components, the personal dose evaluation due to the necessary activities to achieve two different status of “Passive Protective Custody” and “Unconditioned Release” and the waste characterisation. The necessary authorisations to start decommissioning has been obtained as far as concern the removal of spent fuel and the dismantling of some experimental equipments.

Residual Stress Analysis in Containers for Transport of Radioactive Materials

2015 ◽  
Vol 732 ◽  
pp. 28-31 ◽  
Author(s):  
František Trebuňa ◽  
František Šimčák ◽  
Miroslav Pástor ◽  
Patrik Šarga
Keyword(s):  
Residual Stresses ◽  
Experimental Methods ◽  
Hole Drilling ◽  
Thermal Processes ◽  
Safe Operation ◽  
Radioactive Materials ◽  
Hole Drilling Method ◽  
Drilling Method ◽  
Residual Stress Analysis

During verification of safe operation of containers for radioactive waste is possible to use analytical, numerical and experimental methods of mechanics. Determination of residual stresses was one part of analysis. The residual stresses in container body can be induced during their production, overloading during operation, radiation or by thermal processes. In the paper are presented results from analysis of residual stresses in containers by using strain-gage hole-drilling method.

scholarly journals Determination of Fire Enviroment in Stacked Cargo Containers with Radioactive Materials Packages

10.2172/7017 ◽  
1999 ◽  
Author(s):  
M. Arviso ◽  
J.G. Bobbe ◽  
R.D. Dukart ◽  
J.A. Koski
Keyword(s):  
Radioactive Materials ◽  
Cargo Containers

scholarly journals An Assessment of Natural Radioactivity in the Namxe Rare Earth Deposit, Laichau Province, Vietnam

Minerals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 602
Author(s):  
Quang Van Phan ◽  
Trung Thanh Dao ◽  
Phuong Nguyen ◽  
Dinh Huan Trinh ◽  
Thomas Heinig
Keyword(s):  
Rare Earth ◽  
Rare Earth Metals ◽  
Environmental Issues ◽  
Water Usage ◽  
Radioactive Materials ◽  
Mining Site ◽  
Naturally Occurring ◽  
The Rare Earth

The Namxe rare earth deposit belongs to Namxe commune, Phongtho district, Laichau province, which has a large resource of rare earth metals in Vietnam. The case study presents an assessment of the naturally occurring radioactivity for the rare earth prospect Namxe for future monitoring purpose, especially for the case of an actual mine in the area. The investigation included determination of radioactivity in the air, soil, water, and plants. The results showed that although the water usage is harmless, radioactive materials were found in soils and plants in considerable amounts. The mapping of these features revealed two zones of elevated radioactivity, one of which even bearing health risks according to several health standards. These zones correspond well with the rare earth deposit area. From the study, safety, health, and environmental issues could be deduced, including a risk assessment for the area and the intended mining site.

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