One of main unions at the ESB has claimed the Government's plans to break up the company will be bad for both workers and consumers.
Earlier this week, Minister for Natural Resources Noel Dempsey announced plans to transfer control of the national grid infrastructure to a new semi-state company, Eirgrid.
Mr Dempsey said the move would boost competition and benefit consumers.
However, the ATGWU says the move is unjustified and will not reduce consumers' bills by €0.01.
The union, which is due to publish its formal response to the plan today, says breaking up the ESB will damage the company for no good reason and workers will not stand by and allow it to happen.