What is interesting is the power plant has a life span of 30...

What is interesting is the power plant has a life span of 30 years, Alpha has a 10 year life span from what we have seen noted before.

Does this mean that at the end of Alpha there will be 20 years of power going into the local power grid with Alpha finished, or is Alpha going to be a longer than the 10 years we were led to believe?

I would also say that there is a very good change Greenvale gets some funding or grants from the QLD government reading between the lines here, especially given that Greenvale will be offering long term jobs, a carbon neutral project, and renewable self sustaining power generation for 30 years!