Singh also said the country is aiming to generate more than 27,000 MW of nuclear power in the next 10 years.
He underlined the need to ensure that all ingredients by which nuclear fuel is made remain safe and do not fall in the hands of terrorists and anti-social elements.
"Nuclear energy is a dependable and clean option to produce power. India is among the very few nations which have developed technology to install nuclear power plants and have achieved the capability to make nuclear fuel.
He was here to lay the foundation stone of two key projects -- the National Cancer Institute and the Global Centre for Nuclear Energy Partnership.
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"...Certainly I think the best moment was when we were able to strike a nuclear deal with the US," Singh had said earlier in the day when asked at a news conference in Delhi what were his best and lowest moments in life during his tenure. The Indo-US Civilian Nuclear Agreement was signed in 2008.
He said it is also important that the nuclear power plants maintain the highest standards of safety. He said "post the Japan nuclear accident case in 2011, we have adapted highest safety standards in our power plants design and management".
The Prime Minister said as the country's population grows and more urbanisation happens, the demand for power will also go up. Ensuring that there was enough power for our growing economy was the need of the hour, and while there were various sources like coal, hydro, wind, gas to generate power, nuclear energy was a viable and clean alternative, he said.