[mmaro]

Reposting piguy314's [dead] reply:

It's instructive that we've already engineered ways of preventing the problems TEPCO is experiencing at their Fukushima. Many newer reactor designs have a passive residual heat removal system that removes decay heat even without electrical power to run cooling pumps.

http://www.ap1000.westinghousenuclear.com/ap1000_psrs_pccs.h...