Nuclear Applications modelling of

Multi-physics process

Environmental Impact Environmental Impact

Accidents’ Real time forecasting

Sharad Tripathi, June 7,2011

FLUIDYN, 25 years of international presence

Development centersDevelopment centers

Technical centersTechnical centers

AgentsAgents

Some references

Nuclear: Areva, CEA, EdF, Algade, ITER Organisation, IPR, NPCIL,

BARC, British Nuclear, Westlake Scientific, Equipement

manufacturers, IGCAR, DCNS,

Petrochemical: Total, BP, EXXON, Shell, Bureau Veritas, SAIPEM,

Technip, Jacobs, ERM, Mitsubishi, Sumitomo, Schlumberger, GdF,

FLUIDYN, focus on Energy & Environment CFD

Technip, Jacobs, ERM, Mitsubishi, Sumitomo, Schlumberger, GdF,

Reliance,

Process: AIR LIQUIDE, ALCAN, ANDRA, Sanofi--Aventis, EADS,

EUROVIA, GENERALE DES EAUX, SAINT-GOBAIN, SNCF, SNECMA,

SOLVAY, etc..

Flow: Incompressible to explosions

Turbulent Flow (RANS)

Mixing flow

Software

flu idynfluidynfluidynfluidyn MP-NS

Leak/ Explosion

Unstable flow (LES)

Thermal convection

Cooling sheet metal with air jets

Heat transfer & thermal stresses

Software

flu idynfluidynfluidynfluidyn MP-CHT Gas turbine flameholder deformations

Plate heat exchanger Metallic sponge heat exchanger(Local Non-Equilibrium Thermal)

Fluid Structure Interaction (coupled)

Flow+Acoustics+ Structural vibrations

Tank burst & over topping of walls

Software

flu idynfluidynfluidynfluidyn MP-FSI

RPV Explosion, Cracks, leaks

Vortex Induced Vibrations

RPV H2 accumulation & Recombination

Inlet

Process data (experimental)

Boundary conditions

THAI Vessel Apparatus Mesh

FluidStructure

Boundary conditions

Steam Liquid

Water

Comparison with Experiments

Water

Hydrogen distribution Temperature

Turbulence models check:

Traceplot1

Traceplot2

After 4200sec

Comparison with Experiments

Traceplot3

1

Traceplot4

After 4200sec

Vacuum pumps, Magneto-Hydro Dynamics

DSMC Code

ITERPump turbo-molecular

flu idyn-CAE

flu idyn-MP Rarefied gas

Coupling of methods/models M

A

N

I

F

O

L

V

A

C

U

U

M1 2 3

Crack

Analytic models of evaporation Domain DSMC

Surface vapor

Surface liquid

Nuclear Field examples

Water leak in Vacuum (DSMC+ NS Flow) ITER International

Liquid metal flow in intense magnetic fields ITER India

Crack & leak in RPV: NUPEC Japan

Vortex Induced Vibrations (filters, sensors, fuel elements):JNC,Mitsubishi,Areva,

Heat generation & transfer in disposal facilities: CEA, France

Hydrogen accumulation& Steam condensation in RPV: NPCIL, India

Centrifugal Isotope separation in vaccum DSMC: CEA, France

H2 accumulation & Explosion in a building ILL Grenoble, FranceH2 accumulation & Explosion in a building ILL Grenoble, France

Sodium water reaction or Mg & UH3 solid state oxidation CEA, France

Uranium Mine Ventilation Algade France, Barc India

Radon accumulation in open cast mines Algade France

Coupled Acoustic, flow & heat transfer AREVA France, IGCAR

Soil desaturation in nuclear deep waste storage ANDRA, France

Dynamic Analysis of a Reactor Core Shroud BARC, India

Liquid Metal flow with Proton Beam Heating BARC

Plug rupture in a tank containing liquid under high pressure JNC

Environment & Risk Software

Atmospheric Pollution

flu idyn PANACHEInternal Pollution

flu idyn VENTIL

flu idyn-PANEPR

Ventilation: flu idyn-VENTCLIM

Explosion: flu idyn-VENTEXflu idyn-PANWAVE

flu idyn-PANFIRE

Risk assessment

flu idyn-PANEIAMines: flu idyn-VENTMINE

flu idyn-FLOWSOL

Water Pollution

flu idyn dBNoise propagation

flu idyn-PANAIR

Air Quality

Atmospheric Impact Radionuclides

Power station of Bugey

Wind tunnel validation

Domaine Dimension:Domaine Dimension:

LengthLength: 3800 m : 3800 m LengthLength: 3800 m : 3800 m

WidthWidth : 770 m: 770 m

HeightHeight : 260 m : 260 m

Tracer contours after 40’

Wind Tunnel Comparison

25

30

35

40

45

50

Con

cent

ratio

n (p

pm)

Exp. 1150mExp. 1750mExp. 2500mModèle 1150m

0

5

10

15

20

-400 -200 0 200 400

Distance (m)

Con

cent

ratio

n (p

pm)

Modèle 1150mModèle 1750mModèle 2500m

Wind tunnel Comparisons

Profils de concentrations verticaux dans l’axe central du domaine à 40min de simulation

25

30

35

40

45

50C

once

ntra

tion

(ppm

) Exp. 1150m

Exp. 1750m

-5

0

5

10

15

20

25

0 50 100 150 200 250 300 350 400

Altitude (m)

Con

cent

ratio

n (p

pm)

Exp. 2500m

Modèle 1150m

Modèle 1750m

Modèle 2500m

Real time Impact Prediction Platform

Schematic Diagram

Sensor

network

External

Real time impact contours

Weather

forecast

Probable chronic emission

Accidental Emission

Impact Forecast

every 3h for next 48h

Operational

update for

Maintenance,

Mitigation,

Cleanup…etc

Release of a Pressure Built-up

Emission after release lasts 60 days- various wind conditions

Model, Embedded Mesh & Source

Source P1 P2 Species I131 CS137 Height 100 m 10m Emission T°C 25 °C Exit velocity 5 m/s 5 m/s

Air Flow & Turbulence for windrose

Real time Operations

Validation

Real-time function

IntranetChronic emission data 30’

Pollution impact evaluation - 1/2h

Sensor network Monitored impact

Background concentrations

Validation

Internet website

Weather data update- 30’

� Automatic computation� 1/2 h simulated in 1/2 h� Transient impact simulation� Emission rate depending on wind speed���� Major innovation: Sources remapping

I-131 & Cs-137 impact

Dose integration for a child/adult

http://www.siaap.fr/tableau-de-bord-sypros

Similar Real time prediction visible on Paris sewage website:

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-146 Ring Rd, HSR Layout, Bangalore, India

Tel: +91 80 25526507Email : contact@fluidyn.com

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