Archives For Scientific Discovery

Did the designers of the japanese seawalls consider all the factors?

In an eerie parallel with the Blayais nuclear power plant flooding incident it appears that the designers of tsunami protection for the Japanese coastal cities and infrastructure hit by the 2011 earthquake did not consider all the combinations of environmental factors that go to set the height of a tsunami.

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Thinking about the unintentional and contra-indicating stall warning signal of AF 447 I was struck by the common themes between AF 447 and the Titanic. In both the design teams designed a vehicle compliant to the regulations of the day. But in both cases an implicit design assumption as to how the system would be operated was invalidated.

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Why we risk…

15/05/2011

Why taking risk is an inherent part of the human condition

On the 6th of May 1968 Neil Armstrong stepped aboard the Lunar Lander Test Vehicle (LLTV) for a routine training mission. During the flight the vehicle went out of control and crashed with Armstrong ejecting to safety seconds before impact. Continue Reading…

Blayais Plant (Image source: Wikipedia Commons)

What a near miss flooding incident at a French nuclear plant in 1999 and the Fukushima 2012 disaster can tell us about fault tolerance and designing for reactor safety

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A report by the AIA on engine rotor bursts and their expected severity raises questions about the levels of damage sustained by QF 32.

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It appears that the underlying certification basis for aircraft safety in the event of a intermediate power turbine rotor bursts is not supported by the rotor failure seen on QF 32.

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The Titanic effect

27/09/2010

So why did the Titanic sink? The reason highlights the role of implicit design assumptions in complex accidents and the interaction of design with operations of safety critical systems

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