Research and Development on NDE field - Atoms for … · Research and Development on NDE field IAEA...

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  • VTT TECHNICAL RESEARCH CENTRE OF FINLAND LTD

    Research and Development

    on NDE field IAEA Technical Meeting on the Optimization of

    Non-Destructive Examination and In-Service

    Inspection to Improve Nuclear Power Plant

    Performance

    Ari Koskinen

    Technical Research Centre of Finland Ltd.

  • 2 2 2017-04-10

    NDE possibilities at VTT

    Qualified NDE technology

    Ultrasonic and eddy current technology

    Mechanised ultrasonic inspections

    Analysing methods

    Qualification of NDE

    Simulation (UT and ET)

    Focus on UT/ET development for demanding components, analysis and risk based inspection

    Evaluation of condition using non-destructive

    evaluation

  • 3 2017-04-10 3

    Ongoing project examples

    to Assess Reliability of

    Emerging Non-destructive

    Techniques for Dissimilar Metal

    PARENT

    SAFIR2018 The Finnish Research

    Programme on Nuclear Power

    Plant Safety 2015 - 2018

    Development of NDE for the

    nuclear waste disposal canisters

    LNPP inspection development

    (ET)

  • 4 2017-04-10 4

    SAFIR2018, WANDA NDE of NPP primary circuit components and concrete

    infrastructure

    WANDA

    WP 1

    NDE on NPP primary circuit

    component materials

    Task 1

    Artificial defects for

    primary circuits

    Task 2

    NDE simulation

    Task 3

    SG magnetite detection

    Task 4

    NDE of DMWs

    WP 2

    NDE of NPP concrete

    infrastructure

    Task 1&2

    NDT methods for NPP RCS &

    mockup

    Task 3

    NDE & RCS durability

    performance

    Task 4 Evaluation and calibration of monitoring sensor & systems

    Task 5 Performance-based design & control of

    concrete durability

  • 5

    NDE on primary circuit

    components

    - Piping butt weld test

    block

  • 6 2017-04-10 6

    Fatigue cracks in austenitic butt weld

    A tubular austenitic steel specimen with butt weld

    Mechanical fatigue and Thermal fatigue cracks in fusion line of cooling line welding

    Different phased array ultrasonic techniques.

    Scanning also on the healthy weld

    Differences in reflector properties on indications, gain the information from different defects

  • 7

    Austenitic Stainless Steel weld US and POD

  • 8 2017-04-10 8

    Austenitic weld inspection with US

    AISI 316L stainless steel weld with machined EDM-notches

    Used methods:

    2,25 and 5 MHz linear phased array 40-75

    Conventional ultrasonic inspection probes 45 and 60

    1,5 MHz 2D matrix phased array 40-70 with skew angle 15

    Simulation with 2,25 MHz phased array 40-75

    Evaluate how the weld affects the amplitude

    response from the different locations of the

    weld

  • 9 2017-04-10 9

    Defects

    4a 3a 2a 1a 4b 3b 2b 1b

  • 10 2017-04-10 10

    2,25 MHz POD curve depending on the location

  • 11

    Eddy Current modelling

    on SG Magnetite with

    CIVA and COMSOL

    Magnetite Steel tube Probe

  • 12 12 2017-04-10

    CIVA and COMSOL ET modelling - amplitudes

    Simulation of eddy current magnetite pile detection with a simple case

    symmetric magnetite pile around the tube

    Goal is to model a novel probe to detect the existence of the magnetite

    pile, also asymmetric cases

    Receiving and

    transmitting coils

    h=1.5 mm and

    N=70 turns

  • 13 13 2017-04-10

    Transmitting coil height 1.5 mm, turns 70

    Receiving coil height 8 mm turns 350

    Magnetite layer thickness 3mm, ends in slope

    CIVA and COMSOL modelling -Total amplitude and

    phase angle

    Coil distance 20 mm. Coil distance 40 mm.

  • 14

    NDE on NPP concrete

    infrastructure

  • 15 2017-04-10 15

    NDE Research on Reinforced NPP Concrete

    Structures

    NDT methods for RCS

    Sensors & monitoring approaches for

    RCS

    Reinforced concrete full scale wall mock-

    up

    Define the scope of the NDE mock-up

    study in geometry, concrete

    characteristics, reinforcement, NDE

    NPP Reinforced Concrete Structures

    presents challenges

    Large wall cross section (e.g. > 1.0 m)

    Increased reinforcement density with

    complex detailing

    Limited accessibility due to presence of

    liners or other components

  • 16 2017-04-10 16

    NDE of steel cladded concrete beams

    Determining capability to asses condition of structural typology

  • 17 2017-04-10 17

    NUGENIA+ project MAPAID

    Goal to model and validate phased array ultrasonic testing (PAUT)

    techniques for Non Destructive Evaluation (NDE) of dissimilar

    metal welds (DMW) of nuclear power plants (NPP)

    Bay Zoltn Nonprofit Ltd. for Applied Research, Hungary

    Alternatives,

    France

    JV , a.s., Czech Rep.

    VTT Technical Research Centre of Finland Ltd., Finland

    Including participation in international PARENT-project

  • 18 2017-04-10 18

    Our approach in model assisted NDE

    7. Realistic

    POD - curve

    5. Series of simulations with variation in size

    3. Verification of

    simulation

    1. Crack

    simulations

    2. Measurement of fatigue cracks

    4. Knowledge of crack parameter variation

    6. Statistical models

  • 19 2017-04-10 19

    Measurements

    7. Realistic

    POD&ROC - curve

    5. Series of

    simulations with variation

    in size

    3. Verification of

    simulation

    1. Crack

    simulations

    2. Measurement

    of fatigue cracks

    4. Knowledge of

    crack parameter variation 6.

    Statistical models

    CT-measurement from BAM

    Animation done at VTT

    UT-measurement done at VTT