Publication detail
TEM Study of Radiation Induced Defects in Baffle-Former-Barrel Assembly from Decommissioned NPP Greifswald
SRBA, O. MICHALIČKA, J. KEILOVÁ, E. KOČÍK, J.
Czech title
Studie TEM radiačně indukovaných defektů v součásti hraněný plech – hraněný pás – nosný válec z odstavené JE Greifswald
English title
TEM Study of Radiation Induced Defects in Baffle-Former-Barrel Assembly from Decommissioned NPP Greifswald
Type
conference paper
Language
en
Original abstract
A complex transmission electron microscopy (TEM) study of reactor vessel internal (RVI) materials from the baffle-former- barrel assembly from NPP Greifswald (VVER 440), Unit 1 decommissioned after 15 service cycles has been undertaken. All parts of the baffle-former-barrel assembly are made from Ti-stabilized austenitic stainless steel 08Ch18N10T. The materials were exposed to different dose of neutron radiation (2.4 – 11.4 dpa) at temperatures 267 – 398 C depending on position in the core. Three types of radiation induced defects were identified and quantified, namely: Frank dislocation loops, cavities and fine-scaled precipitated particles of Ni-Si rich phases. Black-dot type defects were observed too. Operation conditions were around 300 C that is why defects typical for both low and high regions of irradiation temperatures have observed.
Czech abstract
Byla provedena komplexní studie transmisní elektronovou mikroskopií (TEM) na materiálu z vyňatých segmentů hraněný plech – hraněný pás – nosný válec vnitřních částí reaktoru JE Greifswald (VVER 440), Jednotka 1 odstavené po 15 servisních cyklech. Všechny segmenty byly vyrobeny z austenitické nerezové oceli stabilizované titanem 08Ch18N10T. Segmenty byly vystaveny různým neutronovým dávkám (2.4 – 11.4 dpa) při teplotách 267 – 368 C v závislosti na pozici v jádře reaktoru. Tři typy radiačně indukovaných defektů byly identifikovány a kvantifikovány, jmenovitě: dislokace, kavity a jemné precipitáty fází bohatých na nikl a křemík. Také byly pozorovány defekty typu „černé body“. Provozní podmínky byly kolem 300 C, z toho důvodu byly pozorovány defekty typické pro nízkoteplotní i vysokoteplotní oblasti ozařování.
English abstract
A complex transmission electron microscopy (TEM) study of reactor vessel internal (RVI) materials from the baffle-former- barrel assembly from NPP Greifswald (VVER 440), Unit 1 decommissioned after 15 service cycles has been undertaken. All parts of the baffle-former-barrel assembly are made from Ti-stabilized austenitic stainless steel 08Ch18N10T. The materials were exposed to different dose of neutron radiation (2.4 – 11.4 dpa) at temperatures 267 – 398 C depending on position in the core. Three types of radiation induced defects were identified and quantified, namely: Frank dislocation loops, cavities and fine-scaled precipitated particles of Ni-Si rich phases. Black-dot type defects were observed too. Operation conditions were around 300 C that is why defects typical for both low and high regions of irradiation temperatures have observed.
Keywords in Czech
neutronové ozařování, vnitřní části reaktoru (VČR), TEM
Keywords in English
neutron radiation, reactor vessel internal (RVI), TEM
Released
07.12.2013
Location
France
ISSN
0018-9499
Book
Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), 2013 3rd International Conference onon Nuclear Science, in press, ANIMMA conference, Marseille
Volume
2014
Number
1
Edition number
1
Pages from–to
1–6
Pages count
6
BIBTEX
@inproceedings{BUT102662,
author="Ondřej {Srba} and Jan {Michalička} and Eliška {Keilová} and Jan {Kočík},
title="TEM Study of Radiation Induced Defects in Baffle-Former-Barrel Assembly from Decommissioned NPP Greifswald",
booktitle="Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), 2013 3rd International Conference onon Nuclear Science, in press, ANIMMA conference, Marseille",
year="2013",
volume="2014",
number="1",
month="December",
pages="1--6",
address="France",
issn="0018-9499"
}