Justin Dargin, a nuclear energy expert from Harvard University based in Middle East talks to Al Jazeera on the perils of nuclear radiation and the best possible way to check radiation from spreading.
On electricity being connected to the plant:
I am encouraged; it appears to be quite optimistic. If authorities are able to connect the auto-grid with internal electrical system then I think they would be able to do a comprehensive diagnostic in order to check if cooling system is working or not.
Authorities earlier were optimistic that they would be able to help system on line in, the electrical system, by tonight in terms of reactors 1, 2 and 4 but reactor number 3 can take a bit longer, may be tomorrow. I think that’s a good first step. But we have to be cautious so there really hasn’t been any change in the overall system.
Will the supply of electricity help in checking whether systems at the reactors are working or not?
More or less, that would be the first step. But after words they will have to see if cooling system is operative. If it is operative, then they will be able to turn it on and that would the first thing to start in order to start cooling down the spent fuel rods and as well the rods that have partially melted in reactors 1 and 2. But not insignificant but nothing has changed as of yet. Still we've to be a bit cautious.
On Chernobyl model
The Chernobyl option, as they call it, is the last ditch effort in order to stop nuclear facility that has experienced meltdown. And that would require dumping massive amount of sand and earth on the nuclear facility then after words you construct some type of sarcophagus over it and this may be made of steel and concrete and it would arrest any spread of radioactivity.
However, the eco-system of the area could be contaminated for some period of time. And that is why authorities don’t want to look at that option.
Another issue is that depending how you put sand and earth and other material on top of the fuel rods, you could have uranium pellets inside. If they [pellets] mash together they can recatalyse, then you could have intense amount of radiation released.