scholarly journals Geological Disposal of Nuclear Waste: a Primer

Elements ◽  
2016 ◽  
Vol 12 (4) ◽  
pp. 233-237 ◽  
Author(s):  
Rodney C. Ewing ◽  
Robert A. Whittleston ◽  
Bruce W.D. Yardley
Keyword(s):  
Nuclear Waste ◽  
Geological Disposal

Noncontact Displacement Measurement of Nuclear Waste Canisters in a Geological Disposal by Using an Electromagnetic-Wave Approach

2020 ◽  
Vol 6 (4) ◽  
Author(s):  
Mauro Cappelli ◽  
Vincenzo Surrenti
Keyword(s):  
Nuclear Waste ◽  
Preliminary Investigation ◽  
Displacement Measurement ◽  
Alternative Methods ◽  
Nuclear Waste Repository ◽  
Geological Disposal ◽  
Engineered Barriers ◽  
New Sensors ◽  
High Degree ◽  
Straightforward Approach

Abstract The aim of this work is to show a preliminary investigation of possible noncontact techniques for displacement measurement of radioactive waste in a geological disposal. Since a nuclear waste repository can be considered as a harsh environment, the possibility to study alternative methods for measurement, for example, not using cables or buses for detecting relevant data, should be considered as a priority. A straightforward approach could be the substitution of cables with wireless sensors. But if cables cannot be used and the use of wireless techniques is required, new sensors must assure a reliable transmission without affecting the engineered barriers performance and the reliable use of energy supply for the measuring equipment over long periods. This work shows the results of a study of feasibility on using an electromagnetic (EM) approach for the contactless displacement measurement of a canister immersed and suspended in bentonite, a material with a high degree of water retention.

scholarly journals Rock alteration in alkaline cement waters over 15 years and its relevance to the geological disposal of nuclear waste

2014 ◽  
Vol 50 ◽  
pp. 91-105 ◽  
Author(s):  
Elizabeth B.A. Moyce ◽  
Christopher Rochelle ◽  
Katherine Morris ◽  
Antoni E. Milodowski ◽  
Xiaohui Chen ◽  
...  
Keyword(s):  
Nuclear Waste ◽  
Geological Disposal ◽  
Rock Alteration

scholarly journals A Critical Review of the Recent Improvements in Minimizing Nuclear Waste by Innovative Gas-Cooled Reactors

2008 ◽  
Vol 2008 ◽  
pp. 1-18 ◽  
Author(s):  
E. Bomboni ◽  
N. Cerullo ◽  
G. Lomonaco ◽  
V. Romanello
Keyword(s):  
Nuclear Waste ◽  
Critical Review ◽  
Simplified Models ◽  
Geological Disposal ◽  
Fuel Cycles ◽  
Multiple Recycling ◽  
High Level ◽  
Coupling Current ◽  
The University

This paper presents a critical review of the recent improvements in minimizing nuclear waste in terms of quantities, long-term activities, and radiotoxicities by innovative GCRs, with particular emphasis to the results obtained at the University of Pisa. Regarding these last items, in the frame of some EU projects (GCFR, PUMA, and RAPHAEL), we analyzed symbiotic fuel cycles coupling current LWRs with HTRs, finally closing the cycle by GCFRs. Particularly, we analyzed fertile-free and Pu-Th-based fuel in HTR: we improved plutonium exploitation also by optimizing Pu/Th ratios in the fuel loaded in an HTR. Then, we chose GCFRs to burn residual MA. We have started the calculations on simplified models, but we ended them using more “realistic” models of the reactors. In addition, we have added the GCFR multiple recycling option usingkeffcalculations for all the reactors. As a conclusion, we can state that, coupling HTR with GCFR, the geological disposal issues concerning high-level radiotoxicity of MA can be considerably reduced.

scholarly journals The Geological Disposal of Nuclear Waste

1988 ◽  
Vol 82 (1) ◽  
pp. 114-115
Author(s):  
Mary G. White
Keyword(s):  
Nuclear Waste ◽  
Geological Disposal
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