icone 17, brussels, july 13, 2009 a case history of cfd support to ads system plant 1 a case history...

ICONE 17, Brussels, July 13, 2009

A case history of CFD support to ADS system plant

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A case history of CFD A case history of CFD support to Accelerator Driven support to Accelerator Driven

System plantSystem plantVincent Moreau Vincent Moreau

CRS4, Energy & Environment ProgramCRS4, Energy & Environment Program

Luigi Mansani, Maurizio PetrazziniLuigi Mansani, Maurizio PetrazziniAnsaldo NucleareAnsaldo Nucleare


2A case history of CFD support to ADS system plant

What is an Accelerator Driven What is an Accelerator Driven System ?System ?

An Accelerator Driven System, or ADS, An Accelerator Driven System, or ADS, consists in a sub-critical nuclear fission consists in a sub-critical nuclear fission reactor coupled with a proton reactor coupled with a proton accelerator by means of a target accelerator by means of a target system.system.



THE EUROTRANS THE EUROTRANS PROJECTPROJECT

The Integrated Project EUROTRANS, The Integrated Project EUROTRANS, funded by the European Commission funded by the European Commission (FP6, 2006-2010) is aimed at providing:(FP6, 2006-2010) is aimed at providing:

1.1. the advanced design of a multi purpose the advanced design of a multi purpose research oriented ADS, called XT-ADS research oriented ADS, called XT-ADS (600 Mev, 80 MWth)(600 Mev, 80 MWth)

2.2. The preliminary design of an industrial The preliminary design of an industrial scale ADS, called EFIT (800 Mev, 400 scale ADS, called EFIT (800 Mev, 400 MWth)MWth)


A case history of CFD support to ADS system plant

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CRS4, PulaCFD

Ansaldo, Genoa coordination, design

ENEA, BolognaNeutronics



European Facility for Industrial TransmutationEFITEFIT

Beam power: 800 MevBeam power: 800 Mev Beam intensity: ~20 mABeam intensity: ~20 mA Plant power: ~400 MWthPlant power: ~400 MWth Primary coolant: pure leadPrimary coolant: pure lead Primary coolant flow rate: 36,000 kg/sPrimary coolant flow rate: 36,000 kg/s Core inlet temperature: 400 CCore inlet temperature: 400 C Core outlet temperature: 480 CCore outlet temperature: 480 C Reactor vessel size: 10 m diameter, 12 m Reactor vessel size: 10 m diameter, 12 m

highhigh



EFITEFITAnsaldo design Ansaldo design

(1/2)(1/2)



EFIT 2D CFD simulationEFIT 2D CFD simulation Bottom + Core + Inner PlenumBottom + Core + Inner Plenum Nominal power and flow rateNominal power and flow rate Differentiated core porous resistanceDifferentiated core porous resistance

Objectives: •Preliminary simulation for support to discussion•Set up physical properties•Get confident with object under study



EFIT 2D CFD simulationEFIT 2D CFD simulation



EFIT 2D CFD simulationEFIT 2D CFD simulation

Effects:Effects: Withdraw from core CFD analysis (done Withdraw from core CFD analysis (done

by another partner ENEA, making also by another partner ENEA, making also the core arrangement and the neutronic the core arrangement and the neutronic calculation)calculation)

Separation of bottom and top concern Separation of bottom and top concern Change of the bottom grid orientationChange of the bottom grid orientation Investigate on pump entrance flowInvestigate on pump entrance flow



Change of the bottom gridChange of the bottom grid



3D CFD check3D CFD check



EFIT inner plenumEFIT inner plenum



EFIT simplified inner EFIT simplified inner plenumplenum



EFIT simplified inner plenumEFIT simplified inner plenum



EFIT Down-comerEFIT Down-comer




Before After After,After 3min transient



XT-ADSXT-ADS

Beam power: 350 or 600 MevBeam power: 350 or 600 Mev Beam intensity: max 5 or 2.5 mABeam intensity: max 5 or 2.5 mA Plant power: ~70 MWthPlant power: ~70 MWth Primary coolant: Lead-Bismuth EutecticPrimary coolant: Lead-Bismuth Eutectic Primary coolant flow rate: 6,000 kg/sPrimary coolant flow rate: 6,000 kg/s Core inlet temperature: 300 CCore inlet temperature: 300 C Core outlet temperature: 380 CCore outlet temperature: 380 C Reactor vessel size: ~ 5 m diameter, 8 m Reactor vessel size: ~ 5 m diameter, 8 m

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XT-ADSXT-ADSAnsaldo design, strongly inspired from SCK-CEN Ansaldo design, strongly inspired from SCK-CEN

Myrrha designMyrrha design



XT-ADSXT-ADS



XT-ADS: shut-down XT-ADS: shut-down transienttransient

Extreme scenario Extreme scenario Beam interrupted: core decay heatBeam interrupted: core decay heat Pump stops in 3sPump stops in 3s SGU stops in 3sSGU stops in 3s Internal DHR system failsInternal DHR system fails Only external RVACS operativeOnly external RVACS operative 20,000s of transient20,000s of transient



XT-ADS: shut-down XT-ADS: shut-down transienttransientInitial conditionInitial condition



XT-ADS: shut-down XT-ADS: shut-down transienttransientFirst 50sFirst 50s



XT-ADS: shut-down transientXT-ADS: shut-down transientModified colour scales: from 50s to 20,000sModified colour scales: from 50s to 20,000s




Situation at time=20,000sSituation at time=20,000s



Concluding wordsConcluding words We have presented some situations in which CFD We have presented some situations in which CFD

proved to be a useful support to the designer and led proved to be a useful support to the designer and led to design variants.to design variants.

The extensive use of “over-simplified but not rigid” The extensive use of “over-simplified but not rigid” treatment of pumps, heat exchangers, by-pass, core treatment of pumps, heat exchangers, by-pass, core heat release allowed to investigate medium and heat release allowed to investigate medium and large scale 3D behaviours in a rather consistent way. large scale 3D behaviours in a rather consistent way.

This work has been made possible because the This work has been made possible because the designers and the CFD engineer took time to designers and the CFD engineer took time to exchange information and motivation, both exchange information and motivation, both explaining and listening… explaining and listening…

More images and animations on: More images and animations on:

http://people.crs4.it/moreau/HTML/EUROTRANS/index_EUROTRANS.hthttp://people.crs4.it/moreau/HTML/EUROTRANS/index_EUROTRANS.htmlml



Thank you for your Thank you for your attentionattention

icone 17, brussels, july 13, 2009 a case history of cfd support to ads system plant 1 a case history...

Documents

case history of cfd

ads system plant change

d cfd simulation slide

d cfd check slide

target system

core cfd analysis

mwth slide

grid slide