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Reply #13: The danger of using MOX Fuel with dubious data [View All]

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flamingdem Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Mar-23-11 09:33 AM
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13. The danger of using MOX Fuel with dubious data

The danger of using MOX Fuel with dubious data

When MOX fuel is burned in nuclear plants designed for burning uranium fuel, many safety problems arise. For example, the control rods worth are reduced, the emission of radioactive gasses increase, and difficulties arise due to the lower delayed neutron ratio. (See International MOX Assessment report published by CNIC.) Using MOX fuel which is of a low quality, or which exceeds the reactor's design criteria, further increases the likelihood of accidents. Damage to fuel rods and malfunctions in the cooling system are particularly likely in such circumstances. Large amounts of radioactivity may be released and diffused due to the functional failure of reactor vessels and filters.

If there is an accident at Fukushima I-3

Exposure doses for residents resulting from a diffusion of radioactivity caused by a severe accident at Fukushima I-3 were calculated by applying the same method used in the disaster assessment in 'WASH-1400', an accident analysis report produced by the U.S. Atomic Energy Commission.

The plan to burn MOX fuel in light water reactors is called the pluthermal program in Japan. In the core of a pluthermal reactor, there are ten times more actinides such as plutonium, americium, and curium than the core of a uranium reactor. Actinides cause serious internal exposure in human bodies and thus pose a very serious threat to human health.

In short, exposure doses resulting from an accident at a pluthermal reactor would be twice those produced by an accident at a uranium reactor. A given exposure dose would be received by residents over twice the distance. The overall affected area would be four times larger. When fatalities by cancer from an accident at a pluthermal reactor is calculated with an assumption that Tokyo was downwind, the number of cancer fatalities would increase from 0.4 million in the case of an accident at a uranium reactor to 10.6 million. In view of such risks, MOX utilization is simply too dangerous.

By Chihiro Kamisawa
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