Olkiluoto: Nuclear power, pumps, COVID-19. And lots of elk and giant pike.
Olkiluoto is a small peninsula on the west coast of Finland. It is the site of a nuclear power plant with two boiling water reactors that have been in service since 1978 and 1980 respectively. Plans for 2021 include the commissioning of a further reactor, which has been under construction since 2005 — this time, a modern pressurized water reactor. FLUIDSERV colleagues have been actively involved in this project since 2019.
As part of the preparations for launching the new reactor, Olkiluoto 3, FLUIDSERV specialists were also given the task of carrying out comprehensive overhauls of the main cooling pumps and ensuring that they can be put into operation safely.
The first assignment was supposed to take approx. 3 months but had to be interrupted for 1.5 months due to process-related challenges in the power plant. Stringent safety requirements and the associated specifications for corresponding documentation make it mandatory to have an approved work order in place for each work step. These work orders are handled in a special process management system provided by the client. But this system was initially overwhelmed by the large number of orders. The backlog caused by generating the tasks ultimately led to the work on site being interrupted.
Work on the main cooling pumps and the overhaul of the diesel and lubricating oil pumps was resumed in June 2019. Gratifyingly, the response was so favorable that the order volume was increased to a total of 45 pumps to be overhauled. The additional resources required were easily obtained at short notice from within ROBUR itself and specialist colleagues at KOBAU, SAT Kerntechnik and TEC. “Thank god we belong to ROBUR”, commented project manager Sascha Beck, glad to be able to avail himself of this advantage.
For our colleagues on site, the assignment was interesting for a number of reasons. On the one hand, they got to experience Finland and its unspoiled nature. On the other, they got what was probably a unique chance to inspect a yet uncommissioned nuclear power plant, including the future controlled areas. Even for the FLUIDSERV experts, dismantling and cleaning a gear pump (clearness inspection) and having their work audited by WANO (World Association of Nuclear Operators) was a stressful job. But there was no need to worry. Their work received a positive assessment and compliance with all applicable safety regulations was confirmed.
Thanks to the expert opinion of FLUIDSERV’s specialists, an old disagreement between the power plant operator and the emergency diesel supplier was settled more or less incidentally during the overhaul of the installed emergency diesel unit. The components were safely installed and will be operational for many years to come thanks to the proposed compromise.
From March 2020 onwards, the work was further complicated by COVID-19 and strict but sensible protective measures, such as quarantine obligations for newly hired employees and comprehensive regulations for wearing masks. The work was finally completed in May 2020.
Project manager Sascha Beck from FLUIDSERV is now eager to see whether Olkiluoto 3 will be put into operation in 2021 as planned. And he hopes for follow-up contracts from Finland – negotiations concerning first-level support for the installed pumps are currently ongoing. And this is partly for personal reasons: Olkiluoto may be cold and covered in snow in winter, but where else can you meet elk and catch huge pike after work?
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