Method of cleaning the steam generator of a pressurized...

Details Method of cleaning the steam generator of a pressurized... Method of cleaning the steam generator of a pressurized...

G - Physics

21

F

G21F 9/00 (2006.01) F28G 9/00 (2006.01)

Patent

CA 2496682

The invention relates to a method for cleaning steam generating devices of a compressed water reactor, whereby said devices are treated on the secondary side, at high pressure and high temperature, with an aqueous cleaning solution which contains EDTA, a reducing agent and an alkalising agent. According to the invention, morpholine is used as an alkalisation agent. A molar morpholine- concentration, which is at least the same size as the molar concentration of EDTA, is thus selected.

Procédé de nettoyage des dispositifs producteurs de vapeur d'un réacteur à eau sous pression, selon lequel lesdits dispositifs sont traités du côté secondaire, à pression et température accrues, à l'aide d'une solution de nettoyage aqueuse qui contient de l'acide éthylène-diamine-tétracétique, un agent de réduction et un agent d'alcalinisation. Selon la présente invention, de la morpholine est utilisée comme agent d'alcalinisation, la concentration molaire de morpholine étant choisie de manière à être au moins aussi élevée que la concentration molaire d'acide éthylène-diamine-tétracétique.

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