Japanese Tsunami
Power Plant
You could build the power plant more inland or on a higher ground so that if a tsunami wave came inland it will be less damaged. You can also build a wall on the edge of the shore to be certain that no contaminated water will flow into the sea. If you build it on a shallow hill then you could create a moat around it witch leads the water back to the sea.
MEASURES:
False Measure
Japan's Meteorological Agency was criticized for issuing the first tsunami warning that underestimated the size of the wave, 3 minutes after the earthquake. This meant that people could of reacted differently and maybe have prepared or evacuated out of their homes quicker. Japan unveiled a newly installed, upgraded tsunami warning system
Reid Steel
You can use the technique of REID Steel buildings on buildings near the shore. REID Steel buildings are built with columns, main beams and closely space steel joists, all bolted continuously together. Concrete is poured on steel decking in such a way that it becomes trapped by the steel and cannot be removed. They are built above the ground to avoid wave surges and even if there is a large unexpected swell the force on the building will be much less because the water will flow under the building. Buildings should not be close together so that they produce a dam but should be evenly spaced so water can flow between them.
