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  "authors": [
    "James M. Acton"
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    "Carnegie Endowment for International Peace"
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Source: Getty

In The Media

Risk of a Breached Reactor in Japan

A reactor core may have been breached at one of Japan’s Daiichi reactors. For a nation still mobilizing to respond to a triple crisis – the earthquake, tsunami, and nuclear reactor crisis – this dangerous development is difficult to address.

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By James M. Acton
Published on Mar 25, 2011
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Nuclear Policy

The Nuclear Policy Program aims to reduce the risk of nuclear war. Our experts diagnose acute risks stemming from technical and geopolitical developments, generate pragmatic solutions, and use our global network to advance risk-reduction policies. Our work covers deterrence, disarmament, arms control, nonproliferation, and nuclear energy.

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Source: NBC

Two weeks after an earthquake and tsunami struck Japan, causing devastation and triggering a crisis at Japan’s Daiichi and Daini nuclear reactors in Fukushima, Japan is still struggling to cool its damaged nuclear reactors. Highly radioactive water was discovered in a turbine building, a building adjacent to the one containing the reactor. Such highly radioactive water suggests there is some risk of a breached reactor core, although there are other possible explanations that could account for the highly radioactive water.

In an interview on NBC’s Today Show, Carnegie’s James Acton puts the latest development in the Fukushima crisis in context of past nuclear crises. Acton expressed doubt that the radioactive releases would approach the scale of Chernobyl, explaining that an explosion occurred in the fuel itself during the Chernobyl disaster. Such an explosion has not happened in this case. During the Three Mile Island crisis, Acton continued, melted fuel sat at the bottom of the reactor vessel, but did not succeed in burning its way through. Given concerns that the fuel in Japan may be burning through the reactor vessels, Acton concluded that past experience gives scientists little ability to predict the progression of the crisis.

 

James M. Acton
Jessica T. Mathews Chair, Co-director, Nuclear Policy Program
James M. Acton
Nuclear PolicyNuclear EnergyEast AsiaJapan

Carnegie does not take institutional positions on public policy issues; the views represented herein are those of the author(s) and do not necessarily reflect the views of Carnegie, its staff, or its trustees.

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