As always, unzip to the addon Scenery folder with use folders names turned on and activate in the scenery library.
These are RWY12 objects and have been made with Ultimate Terrain Can/Alaska and Toronto2 scenery active.
At Sea level these towers are visible for approx 12 miles. I had the pleasure of sailing past Pickering all the years it was under construction from the adjacent harbour.
In reality the reactors are large domed structures. They do not use cooling towers. Unfortunately I couldn't find a CANDU type to use. These will suffice I'm sure. I reduced the scale to mitigate the problem
