In-situ monitoring of micro-tunnel geometry change based on distributed optical fiber strain sensing

2021 ◽  
Author(s):  
Arianna Piccolo ◽  
Yann Lecieux ◽  
Dominique Leduc ◽  
Sylvie Delepine-Lesoille ◽  
Frederic Bumbieler ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Waste Disposal ◽  
Radioactive Waste Disposal ◽  
In Situ Monitoring ◽  
High Level Waste ◽  
Outer Diameter ◽  
Strain Sensing ◽  
Monitoring Method ◽  
High Level

Abstract Underground radioactive waste disposal facilities must be monitored to guarantee their correct and safe exploitation during the early stage of their service life. This will be the case in Cigéo, the french industrial geological disposal facility for high-level and intermediate-level long-lived waste, which must be monitored for the first a hundred years at least. For this purpose optical fiber strain sensing cables can be chosen for their low intrusivity and resistance to harsh radiation environment. In this paper, a monitoring method able to follow shape evolution of the structure's section, based on distributed strain sensing is tested on a high-level waste disposal cell mock-up, a steel lined micro-tunnel of 762~mm of outer diameter. The cell demonstrator is built in Meuse/Haute-Marne Underground Research Laboratory, in the same geological environment as the one envisaged for Cigéo but it is empty of waste. After 7 months of loading of the rock around the mock-up, a maximum of 2 mm of diameter reduction is observed with Rayleigh-scattering based strain sensing technique and 10 mm of spatial resolution around the circumference. This validation under realistic test conditions opens up to the use of the method in-situ for tunnel monitoring in harsh environment.

Creation of system of final isolation (disposal) of radioactive waste in the Russian Federation

MRS Advances ◽  
2020 ◽  
Vol 5 (5-6) ◽  
pp. 275-282 ◽  
Author(s):  
Vsevolod Igin ◽  
Victor Krasilnikov
Keyword(s):  
Radioactive Waste ◽  
Waste Management ◽  
Waste Disposal ◽  
Russian Federation ◽  
Radioactive Waste Disposal ◽  
High Level Waste ◽  
Federal State ◽  
Radioactive Waste Management ◽  
Near Surface ◽  
High Level

Abstract:The paper provides generic overview of legal and regulatory framework of radioactive waste management activities held in Russian Federation and national operator responsibilities and accomplishments. It gives a short description of waste classification scheme used and plans for radioactive waste disposal. In particular the paper provides information on the plans of the FEDERAL STATE UNITARY ENTERPRISE "National operator for radioactive waste management" to construct and operate several near-surface disposal facilities for low and intermediate level waste with total capacity up to 550 000 cubic meter. The paper also provides detailed information on the steps of high-level waste disposal program including site-selection, construction phase of the underground research laboratory (URL) near the city of Zheleznogorsk, Krasnoyarsk Region and research program after the construction of the URL. The paper also describes Russian system and state policy in the field of RW management and gives recommendations for future implementers.

Approaches to Comparative Risk Assessments of National and International Radioactive Waste Disposal Options

2000 ◽  
Vol 663 ◽  
Author(s):  
J A Heathcote ◽  
A H Rintoul ◽  
P J Waite
Keyword(s):  
Waste Disposal ◽  
Radioactive Waste Disposal ◽  
High Level Waste ◽  
Political Debates ◽  
Safety Case ◽  
Comparative Risk ◽  
Independent Review ◽  
Key Issues ◽  
Scientific Technical ◽  
High Level

ABSTRACTPangea Resources International AG, Switzerland, has put forward the concept of an international geological repository in an Australian desert area, for final disposal of certain of the world's high-level radioactive wastes and surplus fissile materials. Already publicly contentious in Australia, the concept raises unusual issues in safety and environmental assessment. It is timely, therefore, to consider why and how an initial case for such a repository might be made, in comparison with national options for high-level waste disposal that it might displace.There are several stages ahead of development of a formal safety case for an international repository. The first, and almost certainly the most challenging, is winning of public and political acceptance in the host country that such a repository is the ‘best’ solution to a global problem.We consider the basic need to identify and encompass the concerns of widely disparate stakeholders — industry, governments, national and international regulators, environmental interest groups and the public at large — so that public and political debates can be informed effectively. Many key issues will require comparison both of risks arising from very different operations, and of dissimilar prospective safety performances of complete disposal systems over periods spanning thousands of generations. Nevertheless, we conclude that the validity of such a comparative assessment could be assured by consistent application of a judicious blend of assessment techniques across the alternatives. We also conclude that its usefulness as a vehicle for public discussion would be enhanced by careful attention to public concerns, and by transparently independent review by scientific, technical, sociological and ethical specialists.

Uncertainties on Future States of Radioactive Waste Disposal Systems - Interest and Sketch of a Methodology

1997 ◽  
Vol 506 ◽  
Author(s):  
O.M. Badie ◽  
P. Santucci ◽  
E Horowitz ◽  
F. Bruyere ◽  
Ph. Giaume
Keyword(s):  
Radioactive Waste ◽  
Complex Systems ◽  
Waste Disposal ◽  
Radioactive Waste Disposal ◽  
High Level Waste ◽  
Time Periods ◽  
High Level ◽  
Lack Of Knowledge

ABSTRACTHigh level waste repositorie facilities are complex systems : the parameters, processes, their interactions and the relationships between the system and its environment are numerous. Lack of knowledge and variability of parameters in the field we are studying and the time periods we require to consider, generate uncertainty which may be hard to evaluate and may affect sensitive factors (ex: human intrusion).

scholarly journals EXPERIMENTAL STUDY ON MANUFACTURE OF BLOCK-TYPE BUFFER FOR HIGH-LEVEL RADIOACTIVE WASTE DISPOSAL

2003 ◽  
pp. 203-208
Author(s):  
Hideo KOMINE ◽  
Nobuhide OGATA ◽  
Akira NAKASHIMA ◽  
Hajime TAKAO ◽  
Hiroyoshi UEDA ◽  
...  
Keyword(s):  
Experimental Study ◽  
Radioactive Waste ◽  
Waste Disposal ◽  
Radioactive Waste Disposal ◽  
Block Type ◽  
High Level Radioactive Waste ◽  
High Level
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