Didier De Bruyn & Rafaël Fernandez (SCK•CEN),Luigi Mansani (Ansaldo), Antony Woaye-Hune (AREVA),

Massimo Sarotto (ENEA) & Evaldas Bubelis (KIT)

ICAPP’12 ConferenceChicago, 24-28 June 2012

Copyright © 2012

SCK•CEN 1

The fast-spectrum transmutation experimental facility FASTEF: main design achievements (part 1: Core &

Primary system) within the FP7-CDT collaborative project of the European Commission

Table of contents

Purpose of the MYRRHA project at SCK•CENPlace of FP7 CDT project in this frameConclusions of WP2 related to primary system Illustrations of design todayWay ahead to construction

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Fission generates High-Level Nuclear Waste

U235

nPu Np Am Cm

Actinides Minor Actinides

Neutron

Uranium Fission

Fuel

U238

n

n

n

U235

U238

Plutonium Neptunium Americium Curium

Minor Actinides

high radiotoxicity long lived wastethat are difficult to store due to:

Long lived (>1,000 years)

Highly radiotoxic

Heat emitting

spent fuel reprocessing

no reprocessing

Uraniumnaturel

Time (years)

Rel

ativ

e ra

dio

toxi

city transmutation

of spent fuel

Duration Reduction 1.000x

Volume Reduction 100x

Motivation for Transmutation

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Reactor• Subcritical mode• 65 to 100 MWth

Accelerator(600 MeV - 4 mA proton)

FastNeutronSource

Spallation Source

Lead-Bismuthcoolant

MultipurposeFlexible

IrradiationFacility

MYRRHA is an Accelerator Driven System

Innovative & Unique

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Continuity: SCK•CEN has a long tradition of «first of a kind»

Inventor of innovative nuclear

fuel (MOX fuel)

1st pressurized water reactor (PWR)

outside of US (BR3)

World first underground laboratory for R&D on HL waste disposal (HADES)

World premiere project for transmutation of

nuclear waste

Highest performing material testing reactor

in Europe (BR2)

World firstlead based ADS(GUINEVERE)

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ALLEGROExperimental reactor

(GFR)

ASTRID Prototype

(SFR)

2008 2012 2020

SFR

Supporting infrastructures, research facilities

MYRRHAETPP European

demonstration reactor (LFR)

Reference technology

Alternative technology

LFR

GFR

The place of MYRRHA in ESNIIEuropean Sustainable Nuclear Industrial Initiative

MYRRHAFast spectrum

irradiation facility

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MYRRHA is an international project

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Table of contents

Purpose of the MYRRHA project at SCK•CENPlace of FP7 CDT project in this frameConclusions of WP2 related to primary system Illustrations of design todayWay ahead to construction

9

The CDT project aimed at going further:

Starting from the outcome of different FP projects (PDS-XADS, EUROTRANS) and national initiatives (MYRRHA),

Obtain a more advanced design of a flexible irradiation facility, FASTEF, able to work in both sub-critical and critical mode,

Setting also up a centralised multi-disciplinary team, based at Mol for its core group,

Concentrating on primary and core systems (this paper) and on reactor building design & plant layout (other paper – session 9.05),

The project started in April 2009 for a duration of 36 months.

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Table of contents

Purpose of the MYRRHA project at SCK•CENPlace of FP7 CDT project in this frameConclusions of WP2 related to primary

system Illustrations of design todayWay ahead to construction

11

FASTEF is a performing, rubust facility

Maximum core power amounts 100 MWth;High fast flux intensity obtained by maximizing

poxer density;Many positions available in the core to host

experiments;All components in reactor vessel designed to be

removable;Diaphragm separates hot and cold coolant;Safety analyses demonstrate robustness against

transients.

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Table of contents

Purpose of the MYRRHA project at SCK•CENPlace of FP7 CDT project in this frameConclusions of WP2 related to primary system Illustrations of design todayWay ahead to construction

13

Reactor Vessel Reactor Cover Core Support Structure

Core Barrel Core Support Plate Jacket

Core Reflector Assemblies Dummy Assemblies Fuel Assemblies

Spallation Target Assembly and Beam Line Above Core Structure

Core Plug Multifunctional Channels Core Restraint System

Control Rods, Safety Rods, Mo-99 production units Primary Heat Exchangers Primary Pumps Si-doping Facility Diaphragm

IVFS IVFHS

IVFHM

Reactor layout

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Reactor Vessel

Main dimensionsHeight: about 12.200 mInner diameter: 8 mWall thickness: 80 mm

MaterialAISI 316L

WeightAbout 320 ton

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Reactor Cover

Main dimensionsHeight: 2 mOuter diameter: 9.3 m

MaterialAISI 316LConcrete

WeightAbout 340 ton

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Reactor Cover

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Diaphragm

Main dimensionsDouble plate designBaffleIn-vessel fuel storageHeight: about 9.8 mInner diameter: 7.7 mWall thickness: 50 mmLower plate thickness: 80 mmUpper plate thickness: 50 mm

MaterialAISI 316L

WeightAbout 190 ton

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Core and Fuel Assemblies

151 positions & 37 multifunctional plugs

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Table of contents

Purpose of the MYRRHA project at SCK•CENPlace of FP7 CDT project in this frameConclusions of WP2 related to primary system Illustrations of design todayWay ahead to construction

20

The project schedule

2010 – 2014: Front End Engineering Design; file for the Belgian Government

2015: Tendering & Procurement2016 – 2018: Civil Engineering & construction of

components2019: On site assembly2020 – 2022: Commissioning at progressive

power2023: Progressive start-up2024 – 20??: Full exploitation

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Copyright notice

Copyright © 2012 - SCKCEN

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