Corrosion and Long Term Performance of Concrete in NPP and Waste Facilities
V. L'Hostis, F. Foct and D. Féron
J. Phys. IV France 136 (2006) 257-262
DOI: 10.1051/jp4:2006136026
Corrosion failure of a BWR embedded reactor containment liner
B. WegemarWestinghouse Electric Sweden AB, 721 63 Västerås, Sweden
(Published online 22 December 2006)
Abstract
Following sixteen fuel cycles, leakage through a BWR
embedded reactor containment liner (carbon steel) was discovered. Leakage
was located at a penetration for electrical conductors as a result of
penetrating corrosion attack. During construction, porous cement structures
and air pockets/cavities were formed due to erroneous injection of grout.
Corrosion attacks on the CS steel liner were located at the relatively
small, active surfaces in contact with the porous cement structure. The
corrosion mechanism was supposed to be anodic dissolution of the steel liner
in areas with insufficient passivation. The penetrations were restored
according to original design requirements.
Keywords: corrosion, embedded liner, grout injection
© EDP Sciences 2006