Anyone who actually worked in the nuclear industry would be aware of this.
The water treatment system "is one of the major components of a nuclear power plant":
http://www.globalsecurity.org/wmd/library/news/iran/2006/iran-060624-irna01.htmWater treatment system of Bushehr Nuclear Power Plant to be set up
IRNA - Islamic Republic News Agency
Moscow, June 24, IRNA
Iran-Russia-Power Plant
In-Depth Coverage
The Russian Atom Stroi Export Company, which is currently implementing Bushehr Nuclear Power Plant, declared here Saturday that Russian experts are working on the power plant's (chemical) water treatment system.
The report released by Atom Stroi Export Co. on Saturday said that
the system is one of the major components of a nuclear power plant, adding that according to the relevant timetable, its installation is predicted to be completed by August 31.
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It's in English because the plant was originally built by Siemens:
http://www.globalsecurity.org/wmd/world/iran/bushehr-reactor.htmBushehr - Reactors
The reactor units at Bushehr were initially built by a German company, Siemens, and were built to a plan closely resembling that of the Biblis A unit in Germany. The Bushehr I reactor was 85 percent complete and the Bushehr II reactor was partially complete prior to the 1979 Iranian Revolution, after which construction of both reactors halted. Ayatollah Khomeini declared the project "anti-Islamic," and the government of Mehdi Bazargan soon abandoned it.
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The German designs called for the building between the two units to contain workshops, stores, a water treatment plant, laboratory, welfare rooms, as well as the diesel emergency generators for Unit I.
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In January 1995, Russia and Iran signed a contract under which Russia would provide one VVER-1000 (aka WWER-1000) 950-1,073 MWe (electrical) light water reactor at Bushehr. The VVER-1000 reactor would be similar in configuration to Unit Four of the Russian Balakovskaya plant at Balakovo, Saratov. The Russian reactors would be installed in the original structures designed for the German 1,200-1,300 MWe reactors. Since the horizontal VVER-1000 steam generators were larger than the original German design, the project would require an enlargement of the existing reactor building, though the finished reactor dome would still resemble the German design.
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and because Siemens parts are still being used there:
http://www.ynetnews.com/articles/0,7340,L-3931663,00.html'Siemens sent equipment to Iran reactor via Russia'
German engineering giant announced cutting relations with Iran but Der Spiegel report says Frankurt Airport customs recently seized Siemens-made switches headed for Bushehr via Moscow
Published: 08.08.10, 08:16 / Israel News
Frankfurt Airport customs seized Siemens-made switches and computer modules last June in a shipment headed for Iran's Bushehr reactor via Moscow, Der Spigel reported.
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German customs inspectors said that six similar shipments have been sent since the end of 2009 containing various Siemens parts for the Iranian nuclear industry. All six shipments left Frankfurt and reached their destination in Bushehr.
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More info on power plant water treatment:
http://anto-hendarto.blogspot.com/2010/03/water-treatment.htmlNuclear power plants also require pure water for the spent fuel cooling ponds, which isn't mentioned in that article.