公开(公告)号：FR2765720B1

公开(公告)日：1999-10-01

申请号：FR9708285

申请日：1997-07-01

Applicant: FRAMATOME SA

Inventor： TEXIER CHRISTOPHE ,  GUILLERMIER PIERRE ,  GENTIL CHRISTINE

IPC: F22B37/48 ,  F28G9/00 ,  G21C17/017 ,  G21D5/12

公开(公告)号：FR2765720A1

公开(公告)日：1999-01-08

申请号：FR9708285

申请日：1997-07-01

Applicant: FRAMATOME SA

Inventor： TEXIER CHRISTOPHE ,  GUILLERMIER PIERRE ,  GENTIL CHRISTINE

IPC: F22B37/48 ,  F28G9/00 ,  G21C17/017 ,  G21D5/12

Abstract: The cleaning procedure consists of injecting a chemical solution into the secondary section of the steam generator (1) through one of the following circuits: the normal feed circuit (8), the emergency feed circuit (10), or the purging circuit, using a reagent injection pump (21) set in a branch of the injection circuit. The chemical solution is a complexing agent containing ethylenediamine- tetraacetic acid, a reducer such as hydrazine and a corrosion inhibitor. It is kept at a predetermined temperature by circulating it with the aid of cooling water at the appropriate temperature in the primary circuit, and it is evacuated through the purging circuit once the pollutants have been dissolved. The circuit is then rinsed with demineralised water from a tank in the emergency feed circuit.