UDAIPUR (Tripura), July 19: Criticising Prime Minister Manmohan Singh for going ahead with the nuclear deal, Tripura Chief Minister and CPI-M Politburo member Manik Sarkar today said if power is generated from different natural resources of the northeastern region it would be cheaper than that from nuclear reactors. Addressing CPI-M supporters and activists here, Sarkar said huge quantity of power could be produced by using river water and natural gas available in the NE region. "The cost of power from nuclear sources would be Rs 11 to Rs 14 per unit, on the other hand power can be generated at the rate of Rs 4 to Rs 5 per unit from natural resources in the NE,' he said. If the nuclear deal is signed, the sovereignty of the country would be at stake, he alleged.