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2. Studies concerning the reinforcement corrosion of concrete vaults for intermediate-level radioactive waste disposal

Title: 2. Studies concerning the reinforcement corrosion of concrete vaults for intermediate-level radioactive waste disposal
Author(s): F.M. Schultz, E.A. Arva, G.S. Duffo
Paper category : conference
Book title: NUCPERF 2009 - Long Term Performance of Cementitious Barriers and Reinforced Concrete in Nuclear Power Plants and Waste Management
Editor(s): V. L'Hostis, R. Gens, C. Gallé
Print-ISBN: 978-2-35158-072-1
e-ISBN: 978-2-35158-087-5
Publisher: RILEM Publications SARL
Publication year: 2009
Pages: 13 - 21
Total Pages: 9
Nb references: 10
Language: English

Abstract: The Argentine Atomic Energy Commission (CNEA) is responsible for developing the nuclear waste disposal management programme. This programme contemplates the design and construction of a facility for the final disposal of intermediate-level radioactive wastes. The proposed model is a near-surface monolithic repository based on those in operation in L’Aube, France and El Cabril, Spain. The design of this type of repository is based on the use of multiple, independent and redundant barriers. Since the vault and cover are major components of the engineered barriers, the durability of these concrete structures is an important aspect for the facility integrity. This work presents a laboratory investigation performed on reinforced concrete specimens manufactured with a High Performance Concrete recently developed by the National Institute of Industrial Technology (Argentine), in order to predict the service life of the intermediate level radioactive waste disposal vaults from data obtained from electrochemical techniques. On the other hand, data obtained with corrosion sensors embedded in a vault prototype is also included. These sensors allow on-line measurements of several parameters related to the corrosion process such as rebar corrosion potential and corrosion current density; incoming oxygen flow that reaches the metal surface; concrete electrical resistivity; chloride concentration and internal concrete temperature. All the information obtained from both, laboratory tests and sensors will be used for the final design of the container in order to achieve a service life more or equal than the foreseen durability for this type of facilities.

Online publication: 2009-11-16
Publication type : full_text
Public price (Euros): 0.00

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