Magnox Electric will apply for consent before the end of October to build a 400MW gas-fired power station on Anglesey.
The nuclear generator needs the plant to be able to sign a further long-term contract with Anglesey Aluminium, when the present one expires in 2001.
The 950MW Wylfa nuclear plant, which has supplied the aluminium company since 1972, has regulatory consent to operate only until 2004.
Magnox hopes to secure permission to operate it for at least another 10 years but cannot sign a further long-term supply contract on that assumption.
‘That’s the basis for the whole proposal,’ said a spokesman. He said aluminium plant would account for two-thirds of the gas-fired station’s output, with the surplus sold to the national grid.
The Magnox proposal would not require the construction of new transmission lines, unlike a rival 2,000MW plan put forward by the US developer Canatxx.