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But of course you can have the list:
And why batteries C and D was not turned of in step 3 is still unclear. If they had been they would have lacked all power.
The statistical odds of all those things happening at the same time is probably on the order of a meteor strike
Still, I wouldn't be at all surprised to learn that large amounts of money eventually change hands based on the circumstances surrounding items 4 & 5. Pure speculation on my part, you understand. Somewhere in cyberspace, the ghost of de Chardin is smiling.
So maybe there are just 4 independent faults instead of 7 independent faults. Nothing is 'mere'. — Richard P. Feynman
I do not know why 8 & 9 fell out of the list, but they are clearly related as they are because of 3 (nad the reason I call them 8 & 9 instead of 8 is that the paper does so).
Could you clarify why the high-power pulse counts as separate failure? Was some system meant to block high-power pulses in case of short-circuits?
Overall, withe the final point, this now looks as a much more serious system failure than Vattenfall would have us believe. As a nuclear sceptic, I'd highlight as general principles (a) the irreducibility of the system (which makes cascading failures likely), (b) that this cascading failure, like many others, wasn't expected and as such doesn't turn up in (prior) disaster probability calculations used in safety arguments, (c) that such serious and multiple examples of negligence and technical bungling can occur even in countries with the best record (not the level to be expected in most places should nuclear become a global-warming-battling mainstay of electricity generation globally), (d) that companies do some serious spinning and withholding of information (in this case, the it-wasn't-that-serious-at-all routine) even if they can expect government oversight to uncover the facts for the public some time later. *Traitor*, n. A benighted individual who perceives an illusory distinction between serving his nation and abetting the criminals who govern it.
Yes, there was some protection in the switchgear that was supposed to protect the rest of the system. The article does not say more then that. As I read it, it is implied that this should have worked even in the case of shortcircuit but it does not say it explicitly.
This is just the sort of thing that is not supposed to happen as it cuts through the different layers of security.
