公开(公告)号：FR2764364B1

公开(公告)日：1999-09-03

申请号：FR9706990

申请日：1997-06-05

Applicant: FRAMATOME SA

Inventor： TEXIER CHRISTOPHE ,  GUILLERMIER PIERRE ,  BRUN CHRISTIAN ,  CLINART MARIE HELENE ,  ORGANISTA MANUEL ,  SAURIN PIERRE

IPC: F22B37/48 ,  F28G9/00 ,  F28G1/16 ,  G21C1/08 ,  G21C17/01 ,  G21D5/12

公开(公告)号：FR2764364A1

公开(公告)日：1998-12-11

申请号：FR9706990

申请日：1997-06-05

Applicant: FRAMATOME SA

Inventor： TEXIER CHRISTOPHE ,  GUILLERMIER PIERRE ,  BRUN CHRISTIAN ,  CLINART MARIE HELENE ,  ORGANISTA MANUEL ,  SAURIN PIERRE

IPC: F22B37/48 ,  F28G9/00 ,  F28G1/16 ,  G21C1/08 ,  G21C17/01 ,  G21D5/12

Abstract: The procedure for cleaning the steam generator of a nuclear reactor with pressurised water cooling consists of applying a non-corrosive cleaning solution to the surfaces of the secondary part of the generator after every six years of cumulative operation, and the tube plate after every two years of operation, using a fluid which dissolves and removes deposits containing iron oxide, especially magnetite, particles. The cleaning solution contains a chelating agent such as ethylene tetraacetic acid, hydrazine and a corrosion inhibitor, and is kept at a temperature of close to 140 deg C during the iron oxide removal phase and 90 deg C during passivation and rinsing phases. The procedure can also include a phase for removing copper oxide. Removes deposits before they become harmful to operation of reactor.

公开(公告)号：DE69305780T2

公开(公告)日：1997-04-03

申请号：DE69305780

申请日：1993-04-15

Applicant: FRAMATOME SA

Inventor： BRUN CHRISTIAN ,  GUILLERMIER PIERRE ,  SAURIN PIERRE

IPC: G21F9/06

公开(公告)号：DE69305780D1

公开(公告)日：1996-12-12

申请号：DE69305780

申请日：1993-04-15

Applicant: FRAMATOME SA

Inventor： BRUN CHRISTIAN ,  GUILLERMIER PIERRE ,  SAURIN PIERRE

IPC: G21F9/06

公开(公告)号：FR2526973A1

公开(公告)日：1983-11-18

申请号：FR8208218

申请日：1982-05-12

Applicant: FRAMATOME SA

Inventor： TROTTIER JEAN-PIERRE ,  NORDMANN FRANCIS ,  SAURIN PIERRE

IPC: G21C7/22 ,  G05D21/02 ,  G21C17/02 ,  G21C17/022 ,  G21D3/08 ,  G05D21/00

Abstract: 1. Process for the regulation of the pH of the cooling water of a pressurised-water nuclear reactor, this high temperature, high pressure cooling water containing, in addition to certain unavoidable impurities, boric acid in amounts varying with time, and also a conditioning base, characterised by the fact that : the boric acid concentration of the cooling water and one of two parameters, namely either the pH at ambient temperature or the conditioning base concentration of the cooling water, are continuously measured, the conditioning base concentration of the cooling water, which is necessary to obtain a high temperature pH value of the cooling water equal to a predetermined value, is calculated from the boric acid concentration and the second parameter (pH at ambient temperature or conditioning base concentration), the value of the conditioning base concentration necessary for obtaining the desired high temperature pH is compared with the actual measured or calculated value of that concentration in the cooling water, and that, according to the case where the difference between the necessary concentration and the actual concentration is higher or lower than two predetermined limits : the amount of conditioning base to be added to or removed from the cooling water in order to obtain the desired concentration is calculated, and conditioning base is injected into or taken from the cooling water in order to introduce or remove the calculated amount of conditioning base.