700 tonnes otherwise your maths is on the money, still orders of magnitude more in mass.Spread over the life of a wind turbine of ~20 years is 25kg per mw per annum.
Life of nuclear is up to ~40 years so ~20kg per annum.
Not a lot to chose between them and it really is incidental trivia compared to the energy big picture.
A litre of oil has ~10kwh of energy. A 100 litres per hour is required to produce a megawatt hour. There are 8760 hours in a year. So an oil fired generator (excluding efficiency losses etc) will need 876,000 litres of oil per annum.
About 7000 tonnes. Puts consumption of copper into perspective. Please ;et me know if my sums are materially wrong!!