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Reability of Radioactive Waste Underground Disposal

#3598


Evaluation of Technogenic Loading and Natural Factors Impact on Isolating Properties of RW Underground Isolation Multibarrier System at the Nizhnekansky Granitoid Massif

Tech Area / Field

  • ENV-WDS/Waste Disposal/Environment
  • ENV-MRA/Modelling and Risk Assessment/Environment
  • OBS-GEO/Geology/Other Basic Sciences

Status
3 Approved without Funding

Registration date
23.08.2006

Leading Institute
VNIPI Promtechnology, Russia, Moscow

Supporting institutes

  • Mining and Chemical Complex, Russia, Krasnoyarsk reg., Zheleznogorsk

Collaborators

  • Deutsche Gesellschaft zum Bau und Betrieb von Endlagern für Abfastoffe mbH (DBE), Germany, Peine

Project summary

The project objective is to research and estimate dynamics of variation of engineered barriers’ and hard rock massifs’ properties during long-term underground isolation of high-level activity waste and irradiated nuclear fuel on the basis of generalization of in-situ experimental results on estimation of the effect of large-scale stationary heat sources on engineered and natural barriers in slightly permeable hard rocks at the sites of the Mining and Chemical combine and the Nizhnekansky rock massif.

The accumulated experience concerning behavior of engineered barrier materials under conditions of various technogenic impacts has been obtained on the basis of laboratory experiments carried out in different countries and simulating underground storage conditions. The main disadvantage of such experiments is the necessity to abstract from processes studied not enough and to simplify the developed models that makes impossible to carry out a detailed assessment of mutual influence of the specified technogenic factors and various natural impacts. It causes the necessity to verify and check additionally under natural conditions representative data obtained in laboratory conditions.

In the past, Project participants from VNIPIPT worked on research and design for underground nuclear weapons tests, uranium mining and processing, research and design of RW disposal facilities, developed geological monitoring systems for underground facilities as well as test sites for liquid radwaste disposal. Personnel of the institute will provide overall project management, scientific and technical guidance of the project; make developments in all Project areas.

In the past, project participants from MCC were engaged in weapons-grade plutonium production in nuclear reactors situated in underground drifts and recovery of plutonium from spent nuclear fuel for subsequent use in weapons technologies. The MCC employers are experts in reactor operations, radiochemistry, geology and mining. They will prepare and conduct in-situ experiments in the underground conditions together with experts of VNIPIPT and other specialized geological organizations.

As a result of works, the experimental estimation of a state of engineered barrier system elements will be performed under conditions of long-term technogenic and natural impacts.

Experts from different countries can use experimental estimations of the degradation processes in the rock massif and in engineered barrier materials in natural conditions in forecasting and safety estimation of HLW and SNF underground isolation, for licensing burials and storages, in projects justification for experts and population. Database on probabilistic estimations of variation of engineered barriers isolation characteristics is a necessary basis for safety assessment of RW underground isolation facilities.


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