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At the heart of Itaipu: water purity
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30/03/2009

If there is a word that sums up technician Norberto Guillermo's work, such word is ‘versatility. “To do our job we need to know about mechanics, electricity, and even chemistry”, he stated. It is with versatility that he and an SMMU.DT team carry out their activities at the U07 shutdown: ensuring the purity of very special water.    

If there is a word that sums up technician Norberto Guillermo's work, such word is ‘versatility. “To do our job we need to know about mechanics, electricity, and even chemistry”, he stated. It is with versatility that he and an SMMU.DT team carry out their activities at the U07 shutdown: ensuring the purity of very special water. 

 

 

 

 

The power plant's pure water system is used to cool the stator bars – those 1,008 4-meter bars that surround the stator.

 

There are 168 circuits that cool a set of six bars each. “It is like a house with 168 faucets”, illustrated Norberto. All these faucets take the special water to the stator.

 

Then the water flows inside the stator bars, exchanging heat and helping cool the generator down. From that point, the 168 ‘faucets’ go back through the same pipes for treatment at quota 98, completing the cycle. The water is cooled by a heat exchange system and goes back to its job inside the stator bars.

 

At the U07 maintenance, Norberto's team performed a thorough inspection on the pure water system. They changed parts of the pump and motor that take water to the bars and cleaned the heat exchangers.

 

Pure and useful

 

Pure water has this name for a reason. Special as it is, its electrical conductibility levels are controlled to prevent undesirable electrical conditions in the generator; and so is its Ph, to prevent bar corrosion.

 

The water initially goes through a tank containing resins that remove mineral salts and decrease conductibility. The water moves on to another tank, where it goes through a resin prepared with sodium hydroxide (lye) to remove its acidity.

 

It is all set to flow through the ‘faucets’ of the generator unit.