Venting hydrogen is a thing after you already have a meltdown. It is already too late to forestall disaster. You already have one. What was rejected include an

Venting hydrogen is a thing after you already have a meltdown. It is already too late to forestall disaster. You already have one. What was rejected include an adequate seawall, and backup generators where a tsunami would not flood them. We know the ideas were rejected, because at a sister site only a few miles up the coast, rejections were overcome.