ASTRID In Service Inspection and Repair: review of R&D

IAEA-CN-199 FR’13 Int. Conf.

WEDNESDAY, 6 MARCH 2013

TECHNICAL SESSION 2.4:

Fast reactor technologies, components and instrumentation Paper 337| PAGE 1CEA | 10 AVRIL 2012

François BaquéFrançoise JadotFlorian le BourdaisJulien SibiloJean-Michel AugemOlivier Gastaldi

ASTRID In Service Inspection

and Repair: review of R&D

program and associated results

ASTRID Project and ISI&R Provisions

13 MARS 2013 | PAGE 2ASTRID In Service Inspection and Repair: review of R&D program and associated results

2009 2010 2011 2012 2013 2014 2015 2016 2017

Decision to

continue

Preliminary choice

of options

Decision to

build

Fuel

loading

ASTRID

Basic

design

Detailed

design

&

Constructi

on

Pre-

conceptual

design

Conceptual

design

In Service Inspection & Repair

� range of provisions enabling to verify that the equipments

state is in compliance with design criteria,

� other range of provisions allowing to characterize an

abnormal situation (failure, operation mistake)

and to perform necessary actions to reach

again an achievable plant configuration.

ISI&R need and approach for ASTRID


ISI&R for ASTRID prototype has to contribute to:Safety enhancement,

Reliability improvement,

Availability rate increase,

Cost reductions,

Investment safeguard.

Level 0:

Optimi-

zation

of

Design

Level 1: Continuous

monitoring

Level 2: Periodic

examination

Level 3: Exceptional

interventions

Level 4: Repair

Statutory ISI

Doubts /

warnings

Investment

protection

Statutory ISI

See Poster 165:In-Service Inspection &

Repair in the ASTRID project: main stakes and considered

solutions, F. Jadot et al.

Since 2009 ; from pre-conceptual to conceptual Design

13 MARS 2013 | PAGE 4

20102009 2011 2012

Heat exchangers (SGU and Na-gas)< to be inspectedDesign and manufacturing of innovative EMAT sensorsChoice of a single laser tool for Repair: first tests

and associated in sodium sealing system

ISIR Specifications: NDE Methods and ToolsSimulation of NDE for ASTRID internals: CIVA code development

Experimental water test program for NDE through screens

Specific rules for design versus ISI&R: in RCC-MRx 2012 versionand iterative work between Designers and ControllersManufacturing and testing of new sodium ultrasonic Sensors

In sodium testing for telemetry process qualification

Under sodium vision: pluri-annual R&D program

ASTRID In Service Inspection and Repair: review of R&D program and associated results

2013

Robotics for under sodium ISI&R: pluri-annual R&D program

and first material testing

Feasibility

Development

Qualification

Feedback experience + Simulation

Evolutions + Innovation

H2O + Na tests, at room and 200°C,

under irradiation + prototyping

13 MARS 2013 | PAGE 5

2010-2012: CEA-EDF-AREVA + Aix-Marseille Univ working group

Example of control

conditions

(deviation of ultrasounds

Within welding joint)

New rules in the RCC-MRx code : "Recommandations for Design vs Non Destructive Examination need "

2012: Proposal for RCC-MRx reviewing


Level 0: Optimization of Design

Applications for ASTRID ISI&R project:� Minimizing ISI&R need: few and shorter weldings, design margins,

structures redundancy, low evolution of defects� Making ISI&R operations easier : easier access to weldings and

structures, simpler design, adapted associated robotics� Improving ISI&R tool performance: efficient ultrasonics tools for NDE

� Inspection from outside:Ultrasonic Transducers out of sodium

� Inspection near immersed structures:

Non Destructive Examination METHODS :

in sodium Telemetry & Defectometry

13 MARS 2013 | PAGE 6

INSPECTABILITY of ASTRID Reactor Block: to be as large as possible

3 main R&D axes:


©

Inspection through Main Vessel

and primary sodium, from inter-vessel space

Guided waves Control

using immersed structures which are welded onto the main vessel wall ©

With immersed transducer in sodium, introduced by a port in the slaf

Advantages: Transducers at « conventional » conditions (out of sodium, low radiation)

« Conventional » Robotics

Drawbacks: Limited to structures located near Main Vessel

What is considered as available:

� Robotics and PZT transducers

� Telemetry application: feasibility, in water tests, simulation

| PAGE 7ASTRID In Service Inspection and Repair: review of R&D program and associated results

Running R&D:

� EMAT tranducers

� Accelerometers

� Telemetry and NDE applications: scale 1 in water tests, then in sodium tests

1st AXIS for CONTROL of ASTRID Reactor Block:

INSPECTION from outside, through Main Vessel

| PAGE 8ASTRID In Service Inspection and Repair: review of R&D program and associated results

2nd AXIS for CONTROL of ASTRID Reactor Block:

INSPECTION from outside, using Guided Waves

Advantages: Transducers at « conventional » conditions (out of sodium, low radiation)

« Conventional » Robotics

Drawbacks: Limited to structures located near Main Vessel


� Robotics and PZT transducers

� Optimized Design: Core Supporting welded on Main Vessel

Running R&D:

� Simulation: SAFE methode (coupling Finite Elements & modal decomposition), in sodium ultrasonic diffusion

� Design improvment: welding joint position, structure junctions (Y shape)


3rd AXIS for CONTROL of ASTRID Reactor Block:

INSPECTION with immersed transducers

Advantages: Transducers close to structures to be examined

Drawbacks: Hard operating conditions (within sodium, radiation)

Primary Sodium Circuit to be opened (access, robotics)


� Robotics: rigid poles (z, θ), TUSHT and TUCSS transducers

� In sodium telemetry qualification

� Simulation with CIVA code

Running R&D:

� Robotics: 3D tools

� Improvment of PZT transducers

� EMAT transducers

� In sodium NDE qualification

� Under sodium vision And also: optimization of Design<

Advantages: Qualified Technology (15 year operation in Phénix Plant)

Drawbacks: Acoustic coupling with 200°C sodium

Useful frequency band, signal damping


� Available tools: TUSHT + TUCSS

� LiNbO3 material

� In water ultrasonic field characterization

� In sodium qualification (200°C � 600°C)

IN SODIUM ULTRASONIC PZT TRANSDUCERS

13 MARS 2013 | PAGE 10

Signaux(filtrage entre 4 et 5,5MHz passe bande butterworth) TUSHT ref:T15E2

axe X en mm

axe Y

en m

m

50100150200250300350400450

2

4

6

8

10

12

14

16


Running R&D:

� Simplification, Damping, Wetting

� Miniaturization � Phased Array

� Irradiation tests

Applications for ASTRID: Telemetry and NDE (immersed in sodium)


IN SODIUM Electro Magnetic Acoutic TRANSDUCERS

Advantages: No wetting impact (no need of acoustic couplant)

Drawbacks: Phased Array to be developped

Qualification in sodium conditions


� Feasibility study

� In sodium EMAT mono-element testing

� Simulation of Lorentz forces & ultrasonic field

Running R&D:

� Phased array development

� EMAT 8-element prototype

� In sodium testing (200°C)

Applications for ASTRID: Telemetry and NDE (immersed and from outside)

Réflecteur ponctuel Grand réflecteur régulier Biplan ou triplan

Bord, avec le traducteur à l’extérieurBord, avec le traducteur à l’intérieur

Plage de balayage

13 MARS 2013 | PAGE 12

Characterization and comparison: Water ↔ Liquid Sodium

2011

2012

Signal Treatment Image processing & reconstruction (CIVA code)

Applications for

ASTRID Design

2014-2015

20132013

Applications for ASTRID: surface metrology, vision of immersed components, opened cracks, Robotics, Fuel Handling, lost parts


UNDER SODIUM VISION: R&D program

Vision system architecture definition

2013


CEA-DOE-JAEA Collab. 2013 in water then in sodium tests

UNDER SODIUM VISION: Collaborations

CEA-JAEA Collab.

2011 in water test

for JOYO Fuel Head

TUSHT ∅40mm mono element

CEA-SCK Collab.

2011-2014

Na-PbBi comparison

CEA-IGCAR Collab.

2011-2014First in sodium test in 2013

Simulation of Non Destructive Examination : CIVA

13 MARS 2013 | PAGE 14

Guided waves:

in water tests

with SS mock-up

scale 0.5

with artificial defects


Advantages: CIVA as qualified CEA patented software (PZT and EMAT acoustic source)

Drawbacks: to be developped for specific SFR conditions (thermal field, liquid/solid interface)


� CIVA 10 for Telemetry and NDE in homogeneous medium

� CIVA 11 for heterogeneous medium: in 2013

Running R&D:

� Under sodium vision: 3D echoes

� Guided waves: SAFE method

� EMAT Phased Array

Applications for ASTRID: Telemetry and NDE (immersed and from outside)

Level 4: REPAIR scenarios and tools

13 MARS 2013 | PAGE 15

1. Transfert

2. Positionning

3. Repair

1. A single LASER source

2. Within a tight bell (gas atm.)

3. To be handled in sodium



Level 4: REPAIR laser tool

Advantages: Available feedback, remote control

A single tool (sodium removal, machining, welding)

Drawbacks: Volume and weight of laser head Optical Fiber rigidity (and irradiation effect)


� YAG laser tool

� Feasibility for generic simple configurations

Running R&D:

� Feasibility for realistic conditions (Zn testing)

� Process development (power modulation, head)

� Simulation for optimization of the process

Application for ASTRID: laser to be compatible with tight bell and associated robotics

13 MARS 2013 | PAGE 17

R&D Program launched in 2009

MaterialsInput data for ASTRID

Seal material: modified PWR silicone

In sodium tests, after irradiation 2009-2012

ConceptMARIUS dedicated test device 2011

In water testing 2013-2015Design of a shutter 2012-2014

Positionning kinetics

Prototype for ASTRID : 2015-2018

Conceptu

al D

esig

n


See Poster 125:R&D Program on sealing issues

for In-Service inspection &Repair tools on ASTRID sodium

prototype, K. Vulliez et al.

Level 4: sealing system for ISI&R tools

13 MARS 2013 | PAGE 18

� Definition of Robotic need for ISI&R purpose� Definition of in sodium holder architectures� System and material compatibility with sodium:

� In sodium sensors and components� Material compatibilité with sodium� Material behaviour at 200°C� Material behaviour under irradiation

� Design of tight systems for under sodium operation� Under sodium control of robotic positionning� Final and global integration & benchmarking

R&D Program launched in 2009


Level 4: in sodium ROBOTICS

Running R&D:

� Tests of conventional robot (being customised)

� Innovative poly-articulated concept (CEA 2012)

� Development of systems and sensors

� Specific plateform for in air/water/sodium testsAnd also: optimization of Design<

Direction de l’Énergie Nucléaire

Département de Technologie Nucléaire

Service des Technologies et des Procédés Avancés

Commissariat à l’énergie atomique et aux énergies alternatives

Centre de Cadarache | DEN/CAD/DTN/STPA | Bâtiment 208

13108 Saint-Paul-Lez-Durance

T. +33 (0)4 42 25 34 54 | F. +33 (0)4 42 25 48 68

Etablissement public à caractère industriel et commercial | RCS Paris B 775 685 01913 MARS 2013

CEA | 10 AVRIL 2012

MERCI DE VOTRE ATTENTION

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ASTRID In Service Inspection and Repair: review of R&D