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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

  • DOI - Digital Object Identifier

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

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

    JG - Metallurgy, metal materials

  • OECD FORD branch

Result continuities

  • Project

  • 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

  • e-ISSN

  • 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