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Japan Atomic Energy Agency

Geological Isolation Research and Development


Geological Isolation Basic Research Facility

ENTRY / equipments 1 / equipments 2 / equipments 3

The ENTRY (ENginieering scale Test and Research facilitY), an above-ground facility, was designed to perform a set of relatively large scale and non-radioactive experiments and to assess the performance of the multibarrier system. These research activities are called ENTRY project. The ENTRY Project is intented to connect conventional laboratory tests and in-situ experiments.

The main goals are to develop research models as well as databases for key chemical, hydrological, mass transport and thermo-hydro-mechanical processes. Performance assessment of the multibarrier system supported by an extensive computer analysis is carried out with the use of assessment models and the database developed from laboratory xeperiments, ENTRY Projest, in-situ experiments and geological environment studies.


Geological Isolation Basic Research Facility

Viewpoints of Experimental Research

In order to assess the performance of geological disposal system, it is necessary to study the characteristic of groundwater and the effects on the transport of radioactive nuclides in the waste.

  • What is the groundwater flow and mass transport in engineered barriers and in the surrounding rocks?
  • What is the geochemistry of groundwater?
  • What kinds of materials are adequate for engineered barriers (buffer, overpack)?, what is their performance?, when and how do they come into contact with groundwater?
  • What is the total performance of the multibarrier system?

These are the main subjects of the research and development conducted in the ENTRY. The scientific and technical findings are reflected to the establishment of scientific and technical bases of sefe giological disposal.

»equipments 1

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