Location

Arlington, Virginia

Date

14 Aug 2008, 2:15pm - 4:00pm

Abstract

In connection with the operation of the Kozloduy Nuclear Power Plant and the eventual start of the Belene NPP building, a construction of a National radioactive waste repository is forthcoming. The loess terrain in the Kozloduy region is among the areas considered as a prospective medium for the disposal facility. In the world radioactive waste management practice, the “multibarrier approach” for similar kind of facilities is widely spread. One of the loess soil advantages is its easy stabilization with hydraulic binders. The paper deals with the laboratory seismic waves investigations on mixtures made on the base of loess with a zeolite and bentonite additives, strengthened by ordinary Portland cement as engineered barriers against radionuclide migration. The values of the primary (Vp) and secondary (Vs) waves of loess zeolite and loess bentonite samples are compared with the Vp and Vs values of a natural loess and the loess cement mixtures without any additives. There is an increase of the seismic wave velocities of the loess-cement-additive mixtures up to 1000 % in comparison with those of the natural loess and up to 55% to those of only loess-cement mixtures. SEM photographs allowed observing dense texture of the samples.

Department(s)

Civil, Architectural and Environmental Engineering

Meeting Name

6th Conference of the International Conference on Case Histories in Geotechnical Engineering

Publisher

Missouri University of Science and Technology

Document Version

Final Version

Rights

© 2008 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Laboratory Seismic Wave Investigations on Improved Loess Soils as Engineered Barriers in the Radioactive Waste Repository Case

Arlington, Virginia

In connection with the operation of the Kozloduy Nuclear Power Plant and the eventual start of the Belene NPP building, a construction of a National radioactive waste repository is forthcoming. The loess terrain in the Kozloduy region is among the areas considered as a prospective medium for the disposal facility. In the world radioactive waste management practice, the “multibarrier approach” for similar kind of facilities is widely spread. One of the loess soil advantages is its easy stabilization with hydraulic binders. The paper deals with the laboratory seismic waves investigations on mixtures made on the base of loess with a zeolite and bentonite additives, strengthened by ordinary Portland cement as engineered barriers against radionuclide migration. The values of the primary (Vp) and secondary (Vs) waves of loess zeolite and loess bentonite samples are compared with the Vp and Vs values of a natural loess and the loess cement mixtures without any additives. There is an increase of the seismic wave velocities of the loess-cement-additive mixtures up to 1000 % in comparison with those of the natural loess and up to 55% to those of only loess-cement mixtures. SEM photographs allowed observing dense texture of the samples.