Microstructural evaluation and Ring compression testing of nuclear grade stainless steel fuel claddings

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F16%3AN0000111" target="_blank" >RIV/26722445:_____/16:N0000111 - isvavai.cz</a>

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Microstructural evaluation and Ring compression testing of nuclear grade stainless steel fuel claddings

Original language description

Fuel claddings act as first metallic barriers against loss of fission products during the reactor operation, intermittent storage or final dry storage. Their integrity is critical for the safe operation of power plants. To assess the claddings structural integrity, comprehensive characterization of microstructure and mechanical properties is necessary. In this work, recently produced nuclear grade stainless steel cladding material, cold worked at 24 % and 46 % microstructural analysis was performed. Microscopic investigations revealed the presence of Ti-(C,N) precipitates at the sub-micrometer range and a few larger precipitates up to several microns. Elongated stringer like TiC precipitates in the tube drawing direction were also revealed. Grain size was determined and a well-defined substructure was observed in Field Emission Gun Scanning Electron microscopy (FEG-SEM) and High Resolution Transmission Electron Microscopy (HR-STEM) with characteristic features as MC precipitates, twins, micro-twins, slip bands. No significant microstructural variance between the two cold worked materials was observed. Fuel cladding mechanical properties are assessed by number of testing techniques and evaluating methodologies. There is no standard for testing of fuel claddings due to their geometry (tubular) and smaller wall thickness (app. 0.6 mm). In this work, ring compression test method has been applied to assess stainless steel cladding mechanical properties at room temperature. Methodology and preliminary results from the ring compression tests are presented.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

JF - Nuclear energy

OECD FORD branch

—

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Utilization of SUSEN Technologies for the Gen IV Development

ISBN

978-80-270-0925-1

ISSN

—

e-ISSN

—

Number of pages

7

Pages from-to

92-98

Publisher name

Centrum výzkumu Řež, s.r.o.

Place of publication

Řež

Event location

Řež

Event date

Nov 24, 2016

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

—