TEM RADIATION DAMAGE INVESTIGATION OF NEUTRON IRRADIATED BAFFLE-TO-FORMER BOLT EXTRACTED FROM A DECOMMISSIONED WWER-440 REACTOR
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F14%3APU105783" target="_blank" >RIV/00216305:26210/14:PU105783 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
TEM RADIATION DAMAGE INVESTIGATION OF NEUTRON IRRADIATED BAFFLE-TO-FORMER BOLT EXTRACTED FROM A DECOMMISSIONED WWER-440 REACTOR
Original language description
This study shows results of a radiation microstructure investigation of the baffle-to-former bolt irradiated to 11.4 dpa in real in-service LWR conditions of decommissioned WWER-440 reactor from Greifswald, Germany. The influence of temperature and dose gradients along the bolt was taken into account in the investigation of radiation defects evolution. Since an irradiation temperature about 270C in the bolt head is expected, a significantly higher temperature about 398C is predicted in the end of the bolt due to gamma heating. Also a continuous decrease of neutron dose and dose rate from bolt head towards the bottom of the bolt is present. Three positions along the bolt shank were investigated by TEM: one in each side, and one in the middle of the shank, respectively. Each position was experienced by different irradiation conditions. The TEM observations showed a presence of several radiation-induced defects: Frank dislocation loops, cavities, and Ni-Si rich precipitates. Since the population of Frank loops showed saturated state in each position, the population of cavities and radiation-induced precipitates ascertained specific evolution relatively to irradiation conditions present in particular position of investigation.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
JG - Metallurgy, metal materials
OECD FORD branch
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Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceeding of NACE 16th Environmental Degradation Conference of Materials in Nuclear Power Systems – Water Reactors
ISBN
9781510819238
ISSN
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e-ISSN
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Number of pages
17
Pages from-to
1-17
Publisher name
Neuveden
Place of publication
Neuveden
Event location
Grove Park Inn in Asheville, NC, USA
Event date
Aug 11, 2013
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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