Buckling at Unit No. 4 was likely caused by a quake — Indications that building didn’t ride it out anywhere near as well as we thought (AUDIO & VIDEO)

Published: June 29th, 2012 at 3:03 pm ET
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Interview with Arnie Gundersen
EcoReview
June 26, 2012

At 9:15 in

Arnie Gundersen, Fairewinds Associates: Where that bulge [in Unit 4] is located indicates it’s something called a first mode Euler strut buckle defect. That means it’s likely a seismic problem that came with the initial earthquake or perhaps one of the ones after that.

GUNDERSEN ON FUKUSHIMA FISH SALES AND REACTOR’S BUCKLING BUILDING
Five O’Clock Shadow with Robert Knight
June 28, 2012

At ~18:45 in

Arnie Gundersen, Fairewinds Associates: When you see a building buckle like that, it’s actually called a first mode Euler strut buckle. And it’s caused by seismic induced stress. So of course the industry the has been saying all along, “Well these plants withstood the earthquake perfectly well.” But buckling like we are seeing in unit 4 is an indication that perhaps they didn’t ride out the earthquake anywhere near as well as we thought.

Listen to the broadcast here

Published: June 29th, 2012 at 3:03 pm ET
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  4. Gundersen: Cover at Fukushima Unit 3 looks like a mall superstore — Reactor building so severely damaged it can’t support structure (AUDIO) November 19, 2012
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