| 摘要 |
PROBLEM TO BE SOLVED: To attain maximum compaction of fuel rack against foundation bolts by ensuring more strength margin of the foundation bolts than conventional method when the storage capacity in storing spent fuel racks. SOLUTION: The spent fuel rack 1 itself or a plurality of the fuel racks 1 bundling with a bottom plate 2 are put in parallel on frames 3 having a specific strength to unify and make a self-standing structure. They are made not to fall for postulated earthquakes and the horizontal load of the racks is supported with the foundation bolts by penetrating the foundation bolts in bolt holes 4 provided to the frames 3. In order not to cause a tensile load in the foundation bolts, nuts are not used in fixing.
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