Visualization of

Visualization of

MELCOR Results for

SAMG Training Purposes

Lejla Musanovic, Micha Löffler

Severe Accident Analyses, AREVA GmbH

EMUG, March 17 ^th –18 ^th , 2015, Brussels

Content

Visualization with ATLAS

Introduction of the TVP-viewer

80 cm ² MBLOCA for a German PWR 1300 MW

Summary and conclusion

For visualization of

MELCOR results AREVA is using ATLAS

Effort for preparing images is large

Large parts of the work are usually done by

student trainees

Visualization Tools – ATLAS

Example: visualization of MELCOR results. Primary circuit of a

German PWR 1300 MW

Introduction of the TVP-Viewer

Originally AREVA planned to develop a PC-based, interactive simulator for severe accidents

Full scope simulator not envisaged in Germany (limited operation time of NPPs)

Shift and emergency response teams prefer images similar to the already known images of the visualization during operation

e.g. 4 steam generators, although only 2 loops calculated Extensive changes in the ATLAS tool would be required

Decision to adapt the existing externally developed visualization system: TVP- Viewer = Transient Visualization and Post-Processing

Scope reduced to activate existing pre-calculated accident scenarios from plot files Extendable to existing PC-based interactive simulator: SIM = Simulation and

Interactive Modeling

Developed in the USA by (www.gorma.com)

Used for SAMG training in Germany by the utility

Introduction of the TVP-Viewer – Primary Circuit

Deionat RS-40

Deionat RS-30

Reaktorkühlsystem

F 0.00 F 0.00

F 0.00

D 158 T 347 N 23.2 F 533

dT 34.1 dT 34.1

F 0.00 F 533

D 161 T 293 Q 3900 N 17.8

Q 0.08

DS-20 F 0.00

N 23.2

^G_C

AV

SIV-2

DE 30

T 284 N 32.2 D 67.9 T 284

D F

N 31.6

G C

Vom L&TA

0 4000 C

800 1600 2400 3200

F 4970 T 293 D 161

DE 20

T 284 N 32.2 D 67.9 T 284

D F

N 31.6

G C

F 4972 T 293 D 161

dT 34.1 DS-10

DE 10

T 284 N 32.2 D 67.9 T 284

D F

N 31.6

G C

F 4970 T 293 D 161 dT 34.1

DE 40

T 284 N 32.2 D 67.9 T 284

D F

N 31.6

G C

F 4970 T 293 D 161

DS-40

F 0.00

M 428

F 0.00 F 0.00

HB KB

TH40/45/48

TH48 TH40

TH45

F 0.00

M 428

F 0.00

HB KB

TH30/35

TH30 TH35

F 0.00

M 428

F 0.00 F 0.00

HB KB

TH10/15/18

TH18 TH10

TH15

F 0.00

M 428

F 0.00

HB KB

TH20/25

TH20 TH25

F 0.00 F 0.00

F 533

Vom SpW

F 0.00

F 533

Vom SpW

Deionat RS-20

F 0. 00

Deionat RS-10

F 0.00

F 533

Vom SpW

F 0.00

SIV-1

F 533

Vom SpW

F 533

F 533

F 532 F 533

F 0.00 F 0.00 M 33.9

M 33.9

DS-30

F 0.00 F 0.00 M 33.9

M 33.9

F 0.00 F 0.00

F 0.00 F 0.00

M 33.9 M 33.9 M 33.9

M 33.9

F 532 F 533

F 0.00 F 0.00

F D

Q 0.00 Q 0.00

Q 0.00 Q 0.00

Vom FiWa Vom FiWa

Vom SpW

Vom SpW

Zum BEB

Vom BEB

Zum BEB

Vom BEB

Introduction of the TVP-Viewer – Core

0.00 601.56 0.00 0.00

601.56 0.00 0.00

601.56 0.00 0.00

601.56 0.00 0.00

601.56 0.00 0.00

0.00 0.00

1339.07 624.90 0.00 1352.30

624.91 0.00 1304.60

624.84 0.00 1365.34

624.93 0.00 925.37

623.94 0.00 0.00

0.00 0.00

1671.91 625.35 0.00 1691.60

625.37 0.00 1620.70

625.28 0.00 1711.02

625.39 0.00 1044.53

624.29 0.00 0.00

0.00 0.00

1645.03 625.32 0.00 1663.91

625.33 0.00 1595.81

625.25 0.00 1682.51

625.35 0.00 1034.85

624.27 0.00 0.00

0.00 0.00

1508.00 625.13 0.00 1523.28

625.15 0.00 1462.56

625.07 0.00 1538.24

625.17 0.00 983.67

624.13 0.00 0.00

0.00 0.00

1424.43 625.02 0.00 1440.52

625.04 0.00 1383.07

624.96 0.00 1456.51

625.06 0.00 955.33

624.04 0.00 0.00

0.00 0.00

1366.85 624.94 0.00 1380.93

624.96 0.00 1330.29

624.88 0.00 1394.85

624.98 0.00 935.37

623.98 0.00 0.00

0.00 0.00

1328.38 624.88 0.00 1341.29

624.90 0.00 1294.68

624.82 0.00 1354.01

624.92 0.00 921.47

623.93 0.00 0.00

0.00 0.00

1291.48 624.82 0.00 1303.37

624.83 0.00 1260.32

624.76 0.00 1315.06

624.85 0.00 907.75

623.88 0.00 0.00

0.00 0.00

1241.65 624.73 0.00 1252.29

624.74 0.00 1213.65

624.67 0.00 1262.72

624.76 0.00 888.70

623.81 0.00 0.00

0.00 0.00

1089.03 624.42 0.00 1097.07

624.43 0.00 1067.88

624.36 0.00 1104.96

624.45 0.00 830.73

623.56 0.00 0.00

0.00 0.00

0.00 601.56 0.00 0.00

601.56 0.00 0.00

601.56 0.00 0.00

601.56 0.00 0.00

601.56 0.00 0.00

0.00 0.00

0.00 0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00

0.00 0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00

0.00 0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00

0.00 0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00

0.00 0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00 0.00

0.00 0.00

Cell Data:

1) COR-TFU 2) COR-TCL 3) COR-TPD

Fuel Clad. Shr.

Form.

NS & SS P.Deb. Pool1 Pool2

Congl.Mlt.

Congl.Frz.

0 4000 C

800 1600 2400 3200

Core

bypass

Core zone 1 to 5

Introduction of the TVP-Viewer – Reactor Pit and Cavity

Reaktorkaverne

Gasfreisetzung:

0.00 0.00 0.00 0.00 H2 ...

CO ...

H2O ...

CO2 ...

(Alle Kaverne n)

0.00

0.00 0.00 0.00

0.00 0.00 0.00 0.00 K - 2 K - 1

Schmelz-Energien:

Zerfall Reaktion Beton Oberfläche

Eindringtiefe:

K - 1 Radial Axial 0.00

0.00 0.00 0.00 K - 2

Schmelzschicht:

K - 1 K - 2

-273 -273 0.00 0.00

Temperatur Volumen

None None

TH Ansaugung Sumpf

M 0.00

N 3.00 D 1.00

T 36.6 M 1324

N 30.0

BE-Becken Reaktorraum

0.00 0.00 20.6 0.00 1.98 77.4 CO H2

O2

CO2

N2

H₂O

0 4000 C

800 1600 2400 3200

0.00 0.00 77.4 0.00 1.98 20.6 CO H2

O2

CO2

N2

H₂O

T 48.1 D 1.00

T 32.3 D 0.99

0.00 0.00 77.4 0.00 1.98 20.6 CO H2

O2

CO2

N2

H₂O

T 38.8

D 1.00

T 36.6

FFFF

M 0.00 N 6.90 T 64.2

FFFF

T 64.2

D 1.00

Introduction of the TVP-Viewer - Containment

0.00 0.00 20.6 0.00 1.80 77.6 CO H2

O2

CO2

N2

H₂O

F 0.00e+0

D 1.00

0.00 0.00 20.5 0.00 2.41 77.1 CO H2

O2

CO2

N2

H₂O

T 38.8 D 1.00

0.00 0.00 20.6 0.00 1.98 77.4 CO H2

O2

CO2

N2

H₂O

Q 3900

T 29.9 D 67.9

D 67.9

N 32.2 N 32.2

0.00 0.00 20.6 0.00 1.80 77.6 CO H2

O2

CO2

N2

H₂O

M 0.00 N 6.90 D 1.00

0.00 0.00 20.6 0.00 1.76 77.6 CO H2

O2

CO2

N2

H₂O

T 31.0

F 0.00e +0 F 0.00e+0

FFF

T 64.2

F

T 64.2 D 1.00 M 0.00

N 3.00

F-8.04e-2

F-5.90e-5

Personen- schleuse

Tür zu HAG

SHB Gros s vers agen

T 31.7 D 0.99

T 29.9 M 0.00 N 3.00

F FF F

F 0.00e+0

F 0.00

D 1.00 T 33.2

Reaktorgebäude

Gasfre isetzung 0.00 0.00 0.00 0.00 H2 CO H2O CO2 Zerfall

Reaktion Beton Oberfläche

0.00 0.00 0.00 0.00 Schme lz-Energien

N 17.8 D 161

0 4000 C

800 1600 2400 3200

Shapiro Diagramm:

0.00 0.00 20.7 0.00 1.61 77.7 CO H2

O2

CO2

N2

H₂O

D 0.99 T 30.2

Filter M 0.00 M 0.00

A V

D 0.99 T 46.6 D 0.99

T 48.8

T 40.3 D 1.00

0.00 0.00 20.6 0.00 1.98 77.4 CO H2

O2

CO2

N2

H₂O

T 43.9 D 1.00

0.00 0.00 20.6 0.00 1.98 77.4 CO H2

O2

CO2

N2

H₂O

T 38.8 D 1.00

0.00 0.00 20.6 0.00 1.98 77.4 CO H2

O2

CO2

N2

H₂O

0.00 0.00 20.6 0.00 1.98 77.4 CO H2

O2

CO2

N2

H₂O 0.00

0.00 20.6 0.00 1.98 77.4 CO H2

O2

CO2

N2

H₂O

T 30.2 D 1.00

0.00 0.00 20.6 0.00 1.80 77.6 CO H2

O2

CO2

N2

H₂O 0.00

0.00 20.6 0.00 1.80 77.6 CO H2

O2

CO2

N2

H₂O

D 1.00 T 23.9 V 0.00

T-273 V 0.00 T-273 HMX LMX

Schmelzschicht:

Axial: 0.00 Radial: 0.00 Eindringtiefe:

F 0.00e+0

F 0.00e+0

Eff. H2 % 50 10

90

10

Air %

10

50 50

90

90

Brennbarkeitslimite H

2

Explosionslimite H

2

H2O+CO2 + Excess N2 %

Leck zum HAG SHB Annulus

DE-1/2 Räume - mitte DE-3/4 Räume - mitte Obere Sicherheitshülle

SHB Sumpf Reaktorgrube

RG-SHB Leckage

Boundary conditions of the example scenario:

Injection with 4 safety injection pumps and 4 residual heat removal pumps (RHRP) from borated water storage tanks is available

All 8 accumulators are available

Isolation of the 4 cold leg accumulators 500 s after reaching the emergency core cooling signal

Failure to switch the RHRPs to the sump recirculation mode Automatic secondary side cooldown (100 K/h) is not available Main steam safety valves are available

Emergency feed water system is available

Failure of secondary side bleed and feed and primary side bleed and feed Annulus filtered ventilation system is available

Spent fuel pool cooling is available

Flooding of the melt in the reactor pit after penetration of the biological shield

Visualization of 80 cm ² MBLOCA

Visualization of a 80 cm ² MBLOCA for a

German PWR 1300 MW

Development and drawing of visualization pictures requires a large effort AREVA uses

ATLAS (GRS tool) for all utilities TVP-viewer for E.ON

Shift and emergency response teams prefer images similar to the already known images like visualization during operation

e.g. 4 steam generators, although only 2 loops calculated similar “look-and-feel” of the images

For severe accident visualization, additional images for core degradation, containment, MCCI, etc., have been developed

A full scope simulator for severe accidents is no longer envisioned in Germany

Summary and Conclusion

We acknowledge the contribution to this presentation from Dr. Alfred Torri, Risk Management Associates, Inc.

Acknowledgment

Editor and Copyright [17.03.2015]: AREVA GmbH – Paul-Gossen-Straße 100 – 91052 Erlangen, Germany. It is prohibited to reproduce the present publication in its entirety or partially in whatever form without prior written consent. Legal action may be taken against any infringer and/or any person breaching the

aforementioned prohibitions.

Subject to change without notice, errors excepted. Illustrations may differ from the original. The statements and information in this brochure are for advertising

purposes only and do not constitute an offer of contract. They shall neither be construed as a guarantee of quality or durability, nor as warranties of

merchantability or fitness for a particular purpose. These statements, even if they

are future-orientated, are based on information that was available to us at the date

of publication. Only the terms of individual contracts shall be authoritative for type,

scope and characteristics of our products and services.

End of Presentation:

Visualization of

MELCOR Results for SAMG Training Purposes

Lejla Musanovic, Micha Löffler

Severe Accident Analyses, AREVA GmbH

EMUG, March 17 ^th –18 ^th , 2015, Brussels