I'm not really sure such a thing exists but even if it did you would still have an issue in that anything stored locally would be underwater and anything stored further away would have to be found and transported among all the chaos.
I'm sure there will be things learned from this event that makes the next time round even safer. It's easy to say things were preventable in hindsight but you can't prevent every conceivable issue and even if you could there's always something you won't have thought of.
That's why there are layers and layers and layers and layers of failsafes and prevention measures in use. Just because you need to rely on the 4th or 5th level of protection doesn't mean your system failed. However, it does mean that people can look at levels 1,2 and 3 and see how they can be improved.
That in the event of a major quake the following are entirely probable is not 'every conceivable' type of speculation. Japan is a land just waiting for a major quake, it probably has the toughest building codes in the world.
1. There is a good chance external power will fail. This is a given in a major quake. Don't count on it.
2. There may well be a major tsunami.
After the Indonesian tsunami, the protection for the backup generators may well have stood a quick check. Near sea level behind a sea wall would have raised some interest. Don't count any anything near sea level being available.
3. The outages may well last longer than eight hours in the case of a major quake. In a major quake, expect power to be out for protracted periods of time. Modern battery technology has the capability to keep power going much longer.
The power to keep the cooling going is already very vulnerable on all three available sources. Having multiple
vulnerable backups doesn't count for much.
It may have sounded good in 1970, but over 40 years, a review would have found that it needed improvement.
There are the containment levels, but by the time you are talking about using them, you are already getting pretty desperate. Having the backup cooling is the first line, and if it had worked, none of the the following disaster would have had to be dealt with.
There is also the issue of why an obsolete power plant was still even in service when there are much more modern, that is failsafe, designs available. A politician on the radio claimed this was due to anti nuclear protests. If it hadn't been for them, the plant would have been replaced already. I don't know how true that is.