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Irradiation effects on the evolution of the microstructure, properties and residual stresses in the heat affected zone of stainless steel welds

Objective

Cracking in the heat-affected zone of core shroud welds due to stress corrosion is one of the life limiting phenomena in boiling water reactors. The susceptibility of weld material to stress corrosion cracking is increased by the presence of residual stresses and neutron irradiation. The objective of this project is to assess the correlation of the weld residual stresses and microstructure / microchemistry after irradiation and the specific stress corrosion resistance of the core shroud weld and deduce indications on the mechanism of the cracking process. Representative test welds will be produced that will be irradiated in materials test reactors to relevant neutron dose levels. Moreover, an in-service weld material will be used from a decommissioned reactor. The various irradiated materials will be examined for weld residual stresses, corrosion and mechanical behaviour and microstructure/microchemistry by the different partners.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

NUCLEAR RESEARCH & CONSULTANCY GROUP
Address
Westerduinweg 3
PO Box 25 Petten
Netherlands

Participants (5)

BELGIAN NUCLEAR RESEARCH CENTRE
Belgium
Address
200,Boeretang 200
2400 Mol
CENTRO DE INVESTIGACIONES ENERGETICAS, MEDIAMBIENTALES Y TECNOLOGICAS
Spain
Address
Avenida Complutense 22
Madrid
COMMISSION OF THE EUROPEAN COMMUNITIES
Netherlands
Address
Westerduinweg 3
1755 ZG Petten
FRAMATOME ANP GMBH
Germany
Address
Freyeslebenstrasse 1
91058 Erlangen
PAUL SCHERRER INSTITUT
Switzerland
Address

5232 Villigen