The Finns finally got their new nuclear plant turned on to full capacity. Yup, It caused a national disaster. In fact the output from the plant drove the price of electricity in Finland into negative numbers, necessitating throttling back the plant so the rest of national power grid could actually show a profit.
The low, flatt(ish) area on the right is when the reactor was running in test mode. The green circled area is when it went full time on line.
The article also mentions that the plant was 14 years late getting going without mentioning why, exactly, but given that this is almost certainly a government project, I would be surprised if it didn't come in about 2-4 times the estimated time, and 10 times the original estimated cost.