Durability of cement paste as engineered barrier in borehole waste repository
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2009
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 9th; MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 16th; MEETING ON NUCLEAR INDUSTRY, 1st
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Resumo
The Radioactive Waste Management Laboratory of the Nuclear and Energy Research Institute, in São Paulo,
Brazil, is developing the concept of a repository for disposal of sealed radioactive sources. The concept is a
deep borehole drilled a few hundred meters below surface in a granite batholith. Portland cement paste is the
material intended to backfill the annular space between the steel casing and the geological formation around the
borehole. The hardened cement paste is intended to function as barrier against water flow between the different
strata of the geological setting crossed by the borehole and also as an additional barrier against inflow of water
and migration of the radionuclides present in the sealed sources. A service life of thousands of years is a
necessary characteristic of the engineered barriers in this repository because many sealed sources are long-lived.
The durability of cementitious materials is known only for short periods and must be evaluated for long periods.
This research aims at evaluating the durability of Portland cement paste under the repository conditions
foreseen in that disposal facility, by accelerated tests in laboratory. In this paper we present results of
mechanical strength, mass, and volume variations of cement samples under irradiation, high temperature and
immersion in saline solutions, as a function of time.
Como referenciar
ISIKI, VERA L.K.; FERREIRA, EDUARDO G.A.; MIYAMOTO, HISSAE; MARUMO, JULIO T.; VICENTE, ROBERTO. Durability of cement paste as engineered barrier in borehole waste repository. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 9th; MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 16th; MEETING ON NUCLEAR INDUSTRY, 1st, September 27 - October 2, 2009, Rio de Janeiro, RJ. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/16515. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.