Published 1990
| Version v1
Book
Intergranular corrosion on the secondary coolant side of french PWR steam generators tubes
Description
Intergranular corrosion on the OD of steam generator tubes in French units, led only to a very few plugged tubes, contrarily to most of the countries. Non destructive and destructive examinations have shown that corrosion at tube support plate level increases moderately and is likely initiated by sodium hydroxide; in addition, above tubesheet, significant and sometimes high contents of lead have been noted. Up to now, selected remedies include chemistry specifications with low sodium concentrations obtained by additional mixed bed on makeup water and power decreases for hideout return, when necessary
Abstract (French)
La corrosion intergranulaire cote secondaire des tubes de generateurs de vapeur n'a conduit, sur les centrales REP francaises, qu'a un pourcentage infime de tubes bouches, contrairement a la plupart des pays. Les controles et expertises ont montre que la corrosion au niveau des plaques entretoises evolue de facon moderee et a probablement pour origine la soude; par ailleurs, au niveau de la zone de boue en pied de tube, on note des teneurs en plomb significatives et parfois elevees. Les remedes se sont portes jusqu'ici vers des specifications chimiques avec de faibles teneurs en sodium obtenues par des lits melanges de finition sur l'eau d'appoint et des baisses de charge pour dessequestration lorsque necessaireAdditional details
Additional titles
- Original title (French)
- Corrosion intergranulaire cote secondaire des tubes de generateurs de vapeur francais
Publishing Information
- Publisher
- Societe Francaise d'Energie Nucleaire.
- Imprint Place
- Paris (France)
- Imprint Title
- Contribution of Materials Investigation to the Resolution of problems encountered in PWR Plants. Volume 1
- Imprint Pagination
- 312 p.
- Journal Page Range
- p. 233-242.
Conference
- Title
- International Colloquium on Contribution of materials Investigation to the Resolution of Problems Encountered in PWR Plants.
- Original Conference Title
- Colloque International sur la Contribution des Expertises sur materiaux a la resolution des problemes rencontres dans les REP
- Dates
- 10-14 Sep 1990.
- Place
- Fontevraud (France).
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 22069553
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- CHEMICAL PROPERTIES; FRANCE; INTERGRANULAR CORROSION; PWR TYPE REACTORS; SECONDARY COOLANT CIRCUITS; SPECIFICATIONS; STEAM GENERATORS; TUBES; WATER
- Descriptors DEC
- BOILERS; CHEMICAL REACTIONS; COOLING SYSTEMS; CORROSION; DEVELOPED COUNTRIES; ENRICHED URANIUM REACTORS; EUROPE; HYDROGEN COMPOUNDS; OXYGEN COMPOUNDS; POWER REACTORS; REACTOR COMPONENTS; REACTOR COOLING SYSTEMS; REACTORS; THERMAL REACTORS; VAPOR GENERATORS; WATER COOLED REACTORS; WATER MODERATED REACTORS
Optional Information
- Notes
- Imprint:Contribution des Expertises sur materiaux a la Resolution des problemes rencontres dans les REP. Volume 1.