To the difference with the nuclear systems which require to wait years until a camera can enter the reactor and tell us what happened, we don't need to wait that much to learn the lessons from this accident concerning the power transmission systems :
I am a bit disappointed that the specific "lessons learnt" chapter (chapter XII) fails from restating the above, insisting mostly on "failures derived from a common cause " and "preparing various emergency power supply sources" under "(2) Ensure power supplies" page XII-3 http://www.kantei.go.jp/foreign/kan/...hapter_xii.pdf
). Is it because "Seismic measures for external power lines (power transmission lines)" is too expensive ? Is it feasible ?