Nope, the tsunami protection wall was more like 20 feet high, completely overwhelmed:

"By regulation, the Daiichi plant was fully prepared for a tsunami of up to 5.7 metres. At Daini, ten kilometres along the coast, the design basis was 5.2 metres."

I was trying to harvest this info from earlier postings on this thread but finally gave up and did a search from one of the references on Wikipedia for the Fukushima-1 nuclear complex.

The history and education embedded in this thread is an extraordinary record. The roaches who inherit the earth will be much amused when they become literate.

Charley Noble