Bad news from the construction site of the OL3 EPR nuclear reactor at Olkiluoto in Finland arrives with such reliable and alarming regularity you can almost set your watch by it.
First up we have Jouni Silvennoinen, head of OL3 project for Finnish utility TVO, announcing that the reactor might not now be working until 2013, four years later than planned. TVO has now requested a new timetable from Areva, the reactor’s builders. The reasons Silvennoinen gives for this further delay are problems with the EPR reactor’s vital control and instrumentation system design, and ‘accumulation of delays in construction’. And what an ‘accumulation’…
The second piece of bad news is rather more worrying. The Radiation and Nuclear Safety Authority Finland (STUK) has suspended welding on OL3’s essential cooling system (one of the most important parts of a nuclear reactor) after…
…STUK’s inspectors noticed deficiencies in the welding of the pipes in the plant’s cooling system between 6th and 8th October 2009. Among the deficiencies observed were that one welder did not have the welding instructions at his disposal, neither was he familiar with the welding requirements, as a result of which an excessive amount of power was being used in the welding. Other deviations noticed concerned the use of shielding gas necessary for welding and the shape of the contact surfaces to be welded.
The reactor’s builders have been told time and time again about the poor standards in the welding of this so-called state of the art nuclear reactor. Why have lessons not been learned? How hard can it be to ensure a welder – working on a nuclear reactor - has proper instructions and knows his equipment?
STUK has previously drawn attention to welding quality and its supervision in the welding of the steel lining of the containment building, amongst others. STUK has also required TVO to take into account what has been learned from this experience in pipe welding and its supervision. The matter will continue to require special attention from TVO as the volume of pipe installation work increases in the near future.
The EPR reactor is supposed to be the future of nuclear power. You don’t need a crystal ball to see what that future’s shaping up to look like. It’s going to be a very expensive future, shoddily built and arriving late. EPR must be stopped.
