Induced nuclear reactions: processes – systems – and elements – Handling of fission reactor component structure within... – Storage container systems for new and/or irradiated core...
Reexamination Certificate
2005-04-26
2005-04-26
Behrend, Harvey E. (Department: 3641)
Induced nuclear reactions: processes, systems, and elements
Handling of fission reactor component structure within...
Storage container systems for new and/or irradiated core...
C250S506100, C588S003000
Reexamination Certificate
active
06885719
ABSTRACT:
A method for grouting a decommissioned nuclear reactor containing residual water. A first, water-absorbent grout is used to grout the bottom portion of the reactor vessel. The water-absorbent grout is formed of cement and a water-absorbent particulate material, such as expanded perlite, exfoliated vermiculite or granulated bentonite. Excess water is absorbed by the particulate material, so that the residual water is incorporated in the fill material when it sets. A set retarder may be included to extend the time for uptake of residual water by the particulate material. Foam may also be included to reduce density and increase pumpability. The remaining, upper portion of the reactor vessel is grouted using lightweight cellular cement grout, lacking the water-absorbent particulate material, so that total weight of the fill remains low enough that the grouted vessel can be removed using the facility's installed crane system. Because the residual water is incorporated in the first, water-absorbent grout, the problem of residual water causing dissipation and collapse of the bubble structure in the lightweight cellular cement grout is obviated.
REFERENCES:
patent: 5063967 (1991-11-01), Stephens
patent: 5176752 (1993-01-01), Scheiner
patent: 5241993 (1993-09-01), Stephens
patent: 5791378 (1998-08-01), Stephens
patent: 5803596 (1998-09-01), Stephens
patent: 5819186 (1998-10-01), Stephens
patent: 6087546 (2000-07-01), Griffiths et al.
patent: 6167912 (2001-01-01), Stephens
patent: 6452993 (2002-09-01), Aoki et al.
patent: 6502636 (2003-01-01), Chatterji et al.
patent: 6569924 (2003-05-01), Shendy et al.
patent: 6617484 (2003-09-01), Tuite et al.
Behrend Harvey E.
Hathaway Todd N.
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