The arrogance and jingoism exhibited by the Nuclear lobby in India is well known. Even in face of disaster
Fukushima, the people in DAE remain adamant that there is no option to Nuclear Energy and also that it is safe from accidents, and even if an accidents happens at all they will be ready to control. The optimism that they have regarding issues of safety in case of radioactive materials and nuclear reactors is something a person with a good understanding of science would not share. Too much reliance on the idea that “nothing can go wrong” is what will lead to the horrible consequences of not understanding the Golem. And the statements by the DAE junta does exactly this. The very idea that the reactors are completely safe; are different than what was present in Japan, we can contain the damage, are what are needed to be questioned.
A nice article in Tehelka makes the point more clearer. Here are some lines from the same:

Fukushima also demonstrated unambiguously that communities living near nuclear facilities would be the worst affected in the event of an accident, a lesson that hasn’t been lost on the local populations in Koodankulam and Jaitapur. At the other end of the spectrum was the reaction of the people associated with nuclear establishments, who vociferously argued that it was essential to persist with nuclear power — not surprising, since it conforms to their self-interest.

Whatever the experts at DAE maybe saying, the images that the people at large are seeing are that of desolate landscapes, ruined buildings, poisoned farmlands, and inaccessible homes. The very idea that Nuclear Power can solve all the issue of power in India is questionable. Lets say even if we construct 10 such more plants, where will be the power used? Who will get the priority over the power? The villages near which the power plants are present, or the metro cities whose demands for power and its abuse are ever increasing. Just think about how many electrical appliances  you have, and how many you could do without?

On 15 March 2011, NPCIL Chairman SK Jain trivialised what was going on in Japan saying, “There is no nuclear accident or incident in Fukushima… It is a well-planned emergency preparedness programme… (that) the nuclear operators of the Tokyo Electric Power Company are carrying out to contain the residual heat after the plants had an automatic shutdown following a major earthquake.” Such denial would be laughable but when the person thus opining is in charge of India’s power reactor fleet, it ceases to be amusing.
In September 2011, for example, the DAE Secretary claimed: “We are prepared to handle an event like Fukushima.” This assertion is belied by the Secretary, Ministry of Health and Family Welfare, who testified to the Parliamentary Standing Committee in 2010 that it was “nowhere (near) meeting an eventuality that may arise out of nuclear and radiological emergencies”.
On more than one occasion, the DAE Secretary has made assertions that the probability of a nuclear accident in India is zero. In November 2011, for example, he stated that the probability was “one in infinity”. The public image sought to be created is one of great confidence in safety. Is such confidence justified?
The first point to note is that the very statement that the likelihood of an accident is zero is scientifically untenable; every nuclear reactor has a finite, albeit small, probability of undergoing a catastrophic failure.
A second question: is the confidence on the part of officials about the zero probability of accidents good for safety? This is not a question about technology but about organisations. … Safety scholar James Reason once noted: “If an organisation is convinced that it has achieved a safe culture, it almost certainly has not.” The DAE and its attendant institutions appear to be convinced not just that they have a safe culture, but that the hazardous technologies they operate are incapable of undergoing accidents. This is not conducive to safety.
What the Koodankulam protest tells us is that these populations are not consenting to be subject to this risk. They deserve to be listened to, not dismissed as stooges of foreign funding. That is an insult to the intellects and minds of millions of people and to democracy itself.