Fukushima coolant recirculation with siphon

This design avoids damage to recirculation pumps from sea water sediment. A gravity siphon is used to draw water out of the building into a pit where sediment is collected into a shipping container.

Water is then pumped from the shipping container into the coolant pump cascade. A filter blocks the passage of sediment from the container to the pumps.

When the shipping container is filled with sediment, it can be swapped by crane with an empty container. A valve in the feed line stops flow during changeout.

(Description and illustrations are simplified, of course.)

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Once and future engineer.
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