Publication detail
STUDY OF EXTERNAL COOLING OF STEAM GENERATOR PGV-1000M COLLECTORS POCKET WELD No. 111 FOR SUPPRESSING OF STRESS CORROSION CRACKING
JOCH, L. KRAUTSCHNEIDER, R.
Czech title
Studie externího chlazení kapsy kolektoru parogenerátoru PGV-1000M v místě svaru 111 z důvodu potlačení korozního praskání pod napětím.
English title
STUDY OF EXTERNAL COOLING OF STEAM GENERATOR PGV-1000M COLLECTORS POCKET WELD No. 111 FOR SUPPRESSING OF STRESS CORROSION CRACKING
Type
conference paper
Language
en
Original abstract
The subject of this report is to assess different rates of cooling the bottom of the collector region, specifically the outer surface of the weld JS1200 (also known as weld 111) and the surrounding area. Based on the experience from Russia (OKB Gidropress) it is possible by external cooling of the outer surface of the weld area to reduce tensile stresses in the weld and in the outer radius of collectors pockets, or even change them into compressive stresses. The presence of tensile stresses in the outer radius of collectors pocket in combination with a corrosive environment in the collectors pocket support the possibility of crack initiation and propagation mechanism of stress corrosion cracking (SCC).
Czech abstract
Předmětem tohoto článku je posouzení různých rychlostí ochlazování spodní oblasti kolektoru, konkrétně vnějšího povrchu svaru JS1200 (také známého jako svar 111) a jeho okolí. Na základě zkušeností z Ruska (OKB Gidropress) je možné docílit, na základě chlazení vnějšího spodní oblasti kolektoru, poklesu tahová napětí ve svaru a ve vnějším poloměru kapsy kolektoru, nebo dokonce otočit toto namáhání na tlakové. Přítomnost tahových napětí na vnějším poloměru kapsy kolektoru v kombinaci s koncentrováním solí v této kapse, podporují možnost vzniku trhlin a následného šíření mechanismu koroznímu praskání pod napětím.
English abstract
The subject of this report is to assess different rates of cooling the bottom of the collector region, specifically the outer surface of the weld JS1200 (also known as weld 111) and the surrounding area. Based on the experience from Russia (OKB Gidropress) it is possible by external cooling of the outer surface of the weld area to reduce tensile stresses in the weld and in the outer radius of collectors pockets, or even change them into compressive stresses. The presence of tensile stresses in the outer radius of collectors pocket in combination with a corrosive environment in the collectors pocket support the possibility of crack initiation and propagation mechanism of stress corrosion cracking (SCC).
Keywords in English
fluid structure interaction; steam generator; CFD thermal analysis; stress corrosion cracking
RIV year
2014
Released
15.05.2014
ISBN
978-80-214-4871-1
ISSN
1805-8248
Book
ENGINEERING MECHANICS 2014
Pages from–to
268–271
Pages count
4
BIBTEX
@inproceedings{BUT115758,
author="Lukáš {Joch} and Roman {Krautschneider},
title="STUDY OF EXTERNAL COOLING OF STEAM GENERATOR PGV-1000M COLLECTORS POCKET WELD No. 111 FOR SUPPRESSING OF STRESS CORROSION CRACKING",
booktitle="ENGINEERING MECHANICS 2014",
year="2014",
month="May",
pages="268--271",
isbn="978-80-214-4871-1",
issn="1805-8248"
}