EP 0158566 B1 19890802 - PROCESS FOR ELIMINATING DEPOSITS IN A STEAM GENERATOR OF A NUCLEAR PRESSURIZED WATER REACTOR
Title (en)
PROCESS FOR ELIMINATING DEPOSITS IN A STEAM GENERATOR OF A NUCLEAR PRESSURIZED WATER REACTOR
Publication
Application
Priority
FR 8405377 A 19840405
Abstract (en)
[origin: US4686067A] Process for the elimination of corrosion products formed on the tube plate and in the gaps between the tubes and the spacer plates of a steam generator of a pressurized water nuclear reactor, in order to prevent the appearance of a corrosion phenomena, which can lead to necking or denting of tubes by oxide growth. The process consists of reacting with said oxides at between 50 DEG and 100 DEG C., an aqueous solution containing 6 to 8% gluconic acid, 3 to 5% citric acid, approximately 0.5% of a corrosion inhibitor and ammonia until a pH between approximately 3 and 9.5 is obtained.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
G21F 9/004 (2013.01 - EP US)
Citation (examination)
Anales de Quimica - Madrid, vol. 76, 1978, pages 17-21: "Electromigration Behaviour of Complexes between Fa(II) and Cu(III)ions and gluconic acid", by J. Gonzales-Velarco
Designated contracting state (EPC)
AT BE CH DE GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0158566 A1 19851016; EP 0158566 B1 19890802; AT E45239 T1 19890815; CA 1238843 A 19880705; DE 3572072 D1 19890907; FR 2562710 A1 19851011; FR 2562710 B1 19890217; JP S60230099 A 19851115; US 4686067 A 19870811
DOCDB simple family (application)
EP 85400625 A 19850329; AT 85400625 T 19850329; CA 473633 A 19850205; DE 3572072 T 19850329; FR 8405377 A 19840405; JP 7186085 A 19850404; US 68726484 A 19841228