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Bye, Bye, China Syndrome

The most terrifying vision of nuclear power from the ‘70’s was the image of the self-melting radioactive lava from a former reactor core eating its way to China. People seemed to understand it intuitively no matter how over-represented the risk.

The new reactors make that scenario obsolete with a solution that’s “as dumb as a brick” - hire a bunch of boilermakers to lay down a brick patio under the reactor vessel. Of course, one has to use high temperature alumina brick and lay it about 1.5 meters (~5 feet) thick and wide enough to act as a “cookie sheet.” There will be minor specification changes necessary but nothing that the refractory industry can’t handle easily. Alumina brick is already used for lining glass furnances and slag pits.

Yet, I’ve have NEVER heard or read of the nuclear industry mentioning this in public. We engineers know about it but the ramifications of this feature on the public debate haven’t yet been communicated to the world. In my marketing classes at B-school, I was taught to never confuse a feature and a benefit (unintentionally, that is.) Nobody CARES about our firebrick patio, especially if we insist on calling them "passive corium barriers." But tell them that there can never be a China Syndrome in the new designs, that the China Syndrome is obsolete, and you’ve communicated a real benefit.

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Comments

Anonymous said…
[antinuke mode]

Aha - you see, the new reactors CAN melt down! Why else would they put this molten core-catcher under the reactor, when earlier builds didn't bother? These ones must be even worse than the last ones!
Bombs, radiation, birth defects, pollution, cancer, bombs! Please give generously!!

[/antinuke]
Joseph Somsel said…
A "core catcher" is, to my mind, the term properly used where criticality is a concern, ie for highly enriched fuel and are usually internal to the vessel. Fermi 1 had a core catcher. For LWRs with their low enrichment, corium can not go critical in any configuration therefore they do not have core catchers.

In any case, the short and sweet message is that the China Syndrome is a thing of the past and not a concern for advanced LWRs.

Let the anti's play defense on highly technical issues this time.

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