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Earthquake and Tsunami damage to Daiichi Fukushima 1 (Image Source: Digital Globe)

Bernard Sieker of Bielefield University has put together graphs of the just released TEPCO plant instrumentation data on the Fukushima Daiichi plant (1).

The operators TEPCO had apparently heavily instrumented the plant prior to the tsunami.

My thanks to his colleague Peter Ladkin in publishing this link on the York Safety Critical Mailing List. Aa Peter points out the data is instructive.

So class homework, put together an event timeline against the instrument data, extra points for pictures. 🙂 Continue Reading…

At the height of the cold war with bombers carrying nuclear weapons on airborne alert and the strategic forces of both sides on a knife edge the possibility that a nuclear weapon could go off purely by accident and trigger nuclear war was a disquieting one.

Both sides realised that the risk of inadvertently starting World War III had to be minimised, and on the American side after several near misses in the 40s and 50s engineers at Los Alamos and Sandia labs started to work seriously on how to prevent nuclear weapons from going off by accident.

Continue Reading…