In a letter to Prime Minister Manmohan Singh, Jayalalithaa said any proposal to disinvest even a small portion of the shareholding would lead to "considerable labour unrest".
"Given the current acute power shortage in the State, any disruption of power supply from NLC would very adversely affect the interest of the state. Hence, I strongly urge you to explore (other) alternatives to the proposed investment," she said.
Jayalalithaa said her government has been strongly opposed to privatising any portion of NLC and was of the view that the public sector character of NLC should be maintained without any dilution.
Listing the possibilities available for government in the matter, she said it was incorrect to state that there was no option to disinvesting a further five per cent stake.
Observing that NLC is the largest public sector unit in Tamil Nadu, she said it was also the largest Central power producer located in a backward region of the state providing employment to more than 17,500 persons.
She urged Singh to take necessary action to ensure there was no further disinvestment or dilution of the share holding of the Government of India in NLC.