Visualization of MELCOR Results for SAMG Training PurposesLejla Musanovic, Micha LöfflerSevere Accident Analyses, AREVA GmbHEMUG, March 17th–18th, 2015, Brussels

Visualization of MELCOR results for SAMG training pu rposes – EMUG 2015 - Lejla Musanovic - 12/03/2015 -AREVA GmbH Proprietary - RESTRICTED AREVA - © AREVA - AL: N - ECCN: N - p.3

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Content

Visualization with ATLAS

Introduction of the TVP-viewer

80 cm 2 MBLOCA for a German PWR 1300 MW

Summary and conclusion

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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

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Introduction of the TVP-Viewer

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

� Full scope simulator not envisaged in Germany (limi ted operation time of NPPs)

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

� e.g. 4 steam generators, although only 2 loops calc ulated

� Extensive changes in the ATLAS tool would be requir ed

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

� Scope reduced to activate existing pre-calculated a ccident scenarios from plot files

� Extendable to existing PC-based interactive simulat or: SIM = Simulation and Interactive Modeling

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

Used for SAMG training in Germany by the utility

Visualization of MELCOR results for SAMG training pu rposes – EMUG 2015 - Lejla Musanovic - 12/03/2015 -AREVA GmbH Proprietary - RESTRICTED AREVA - © AREVA - AL: N - ECCN: N - p.6

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Introduction of the TVP-Viewer –Primary Circuit

Deionat

RS-40

Deionat

RS-30

Reaktorkühlsystem

F 0.00F 0.00F 0.00

D 158T 347N 23.2

F 533

dT 34.1dT 34.1

F 0.00

F 533

D 161T 293

Q 3900N 17.8

Q 0.08

DS-20

F 0.00

N 23.2G

C

AV

SIV-2

DE 30

T 284

N 32.2

D 67.9

T 284D

F

N 31.6G

C

Vom

L&TA

0

4000 C

800

1600

2400

3200

F 4970T 293D 161

DE 20

T 284

N 32.2

D 67.9

T 284D

F

N 31.6G

C

F 4972T 293D 161

dT 34.1

DS-10

DE 10

T 284

N 32.2

D 67.9

T 284D

F

N 31.6G

C

F 4970T 293D 161

dT 34.1

DE 40

T 284

N 32.2

D 67.9

T 284D

F

N 31.6G

C

F 4970T 293D 161

DS-40

F 0.00

M 428

F 0.00 F 0.00

HB KB

TH40/45/48

TH48TH40TH45

F 0.00

M 428

F 0.00

HB KB

TH30/35

TH30TH35

F 0.00

M 428

F 0.00 F 0.00

HB KB

TH10/15/18

TH18TH10TH15

F 0.00

M 428

F 0.00

HB KB

TH20/25

TH20TH25

F 0.00

F 0.00

F 533 VomSpW

F 0.00

F 533 VomSpW

Deionat

RS-20

F 0.00

Deionat

RS-10

F 0.00

F 533VomSpW

F 0.00

SIV-1

F 533VomSpW

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 0.00F 0.00

F

D

Q 0.00 Q 0.00Q 0.00Q 0.00

Vom FiWa Vom FiWa

VomSpW

VomSpW

Zum BEB

VomBEB

Zum BEB

VomBEB

Visualization of MELCOR results for SAMG training pu rposes – EMUG 2015 - Lejla Musanovic - 12/03/2015 -AREVA GmbH Proprietary - RESTRICTED AREVA - © AREVA - AL: N - ECCN: N - p.7

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Introduction of the TVP-Viewer –Core

0.00601.56

0.00

0.00601.56

0.00

0.00601.56

0.00

0.00601.56

0.00

0.00601.56

0.00

0.000.000.00

1339.07624.90

0.00

1352.30624.91

0.00

1304.60624.84

0.00

1365.34624.93

0.00

925.37623.94

0.00

0.000.000.00

1671.91625.35

0.00

1691.60625.37

0.00

1620.70625.28

0.00

1711.02625.39

0.00

1044.53624.29

0.00

0.000.000.00

1645.03625.32

0.00

1663.91625.33

0.00

1595.81625.25

0.00

1682.51625.35

0.00

1034.85624.27

0.00

0.000.000.00

1508.00625.13

0.00

1523.28625.15

0.00

1462.56625.07

0.00

1538.24625.17

0.00

983.67624.13

0.00

0.000.000.00

1424.43625.02

0.00

1440.52625.04

0.00

1383.07624.96

0.00

1456.51625.06

0.00

955.33624.04

0.00

0.000.000.00

1366.85624.94

0.00

1380.93624.96

0.00

1330.29624.88

0.00

1394.85624.98

0.00

935.37623.98

0.00

0.000.000.00

1328.38624.88

0.00

1341.29624.90

0.00

1294.68624.82

0.00

1354.01624.92

0.00

921.47623.93

0.00

0.000.000.00

1291.48624.82

0.00

1303.37624.83

0.00

1260.32624.76

0.00

1315.06624.85

0.00

907.75623.88

0.00

0.000.000.00

1241.65624.73

0.00

1252.29624.74

0.00

1213.65624.67

0.00

1262.72624.76

0.00

888.70623.81

0.00

0.000.000.00

1089.03624.42

0.00

1097.07624.43

0.00

1067.88624.36

0.00

1104.96624.45

0.00

830.73623.56

0.00

0.000.000.00

0.00601.56

0.00

0.00601.56

0.00

0.00601.56

0.00

0.00601.56

0.00

0.00601.56

0.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

0.000.000.00

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

Corebypass

Core zone 1 to 5

Visualization of MELCOR results for SAMG training pu rposes – EMUG 2015 - Lejla Musanovic - 12/03/2015 -AREVA GmbH Proprietary - RESTRICTED AREVA - © AREVA - AL: N - ECCN: N - p.8

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Introduction of the TVP-Viewer –Reactor Pit and Cavity

Reaktorkaverne

Gasfreisetzung:

0.00

0.00

0.00

0.00

H2 ......CO .....

H2O ...CO2 ...

(Alle Kavernen) 0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

K - 2K - 1

Schmelz-Energien:

ZerfallReaktionBetonOberfläche

Eindringtiefe:K - 1

RadialAxial 0.00

0.00

0.00

0.00

K - 2

Schmelzschicht:K - 1 K - 2

-273 -273

0.00 0.00

TemperaturVolumen

None None

TH Ansaugung

Sumpf

M 0.00N 3.00

D 1.00T 36.6

M 1324N 30.0

BE-Becken Reaktorraum

0.00 0.00 20.6 0.00 1.98 77.4

COH 2

O 2

CO 2

N 2

H 2O

0

4000 C

800

1600

2400

3200

0.00 0.00 77.4 0.00 1.98 20.6

COH 2

O 2

CO 2

N 2

H 2O

T 48.1D 1.00

T 32.3D 0.99

0.00 0.00 77.4 0.00 1.98 20.6

COH 2

O 2

CO 2

N 2

H 2O T 38.8D 1.00

T 36.6FFFF

M 0.00N 6.90T 64.2FFFF

T 64.2D 1.00

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Introduction of the TVP-Viewer -Containment

0.00 0.00 20.6 0.00 1.80 77.6

COH 2

O 2

CO 2

N 2

H 2O

F 0.00e+0

D 1.00

0.00 0.00 20.5 0.00 2.41 77.1

COH 2

O 2

CO 2

N 2

H 2O

T 38.8D 1.00

0.00 0.00 20.6 0.00 1.98 77.4

COH 2

O 2

CO 2

N 2

H 2O

Q 3900

T 29.9

D 67.9D 67.9N 32.2N 32.2

0.00 0.00 20.6 0.00 1.80 77.6

COH 2

O 2

CO 2

N 2

H 2O

M 0.00N 6.90

D 1.00

0.00 0.00 20.6 0.00 1.76 77.6

COH 2

O 2

CO 2

N 2

H 2O

T 31.0

F 0.00e+0F 0.00e+0

FFFFT 64.2T 64.2D 1.00

M 0.00N 3.00

F-8.04e-2

F-5.90e-5

Personen-schleuse

Tür zu HAG

SHB Grossversagen

T 31.7D 0.99

T 29.9M 0.00N 3.00

FFFF

F 0.00e+0

F 0.00

D 1.00T 33.2

Reaktorgebäude

Gasfreisetzung

0.00

0.00

0.00

0.00

H2CO

H2OCO2

ZerfallReaktionBetonOberfläche

0.00

0.00

0.00

0.00

Schmelz-Energien

N 17.8D 161

0

4000 C

800

1600

2400

3200

Shapiro Diagramm:

0.00 0.00 20.7 0.00 1.61 77.7

COH 2

O 2

CO 2

N 2

H 2OD 0.99T 30.2

FilterM 0.00M 0.00

A

V

D 0.99T 46.6

D 0.99T 48.8

T 40.3D 1.00

0.00 0.00 20.6 0.00 1.98 77.4

COH 2

O 2

CO 2

N 2

H 2O

T 43.9D 1.00

0.00 0.00 20.6 0.00 1.98 77.4

COH 2

O 2

CO 2

N 2

H 2O

T 38.8D 1.00

0.00 0.00 20.6 0.00 1.98 77.4

COH 2

O 2

CO 2

N 2

H 2O

0.00 0.00 20.6 0.00 1.98 77.4

COH 2

O 2

CO 2

N 2

H 2O

0.00 0.00 20.6 0.00 1.98 77.4

COH 2

O 2

CO 2

N 2

H 2O

T 30.2D 1.00

0.00 0.00 20.6 0.00 1.80 77.6

COH 2

O 2

CO 2

N 2

H 2O

0.00 0.00 20.6 0.00 1.80 77.6

COH 2

O 2

CO 2

N 2

H 2O

D 1.00T 23.9

V 0.00T-273

V 0.00T-273

HMX

LMX

Schmelzschicht:

Axial: 0.00

Radial: 0.00

Eindringtiefe:

F 0.00e+0

F 0.00e+0

Eff. H2 % 105090

10

Air %

10

5050

90

90

Brennbarkeitslimite2H

Explosionslimite2H

H2O+CO2 +Excess N2 %

Leck zumHAG

SHB Annulus

DE-1/2 Räume - mitteDE-3/4 Räume - mitte

Obere Sicherheitshülle

SHB SumpfReaktorgrube

RG-SHB Leckage

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Boundary conditions of the example scenario:

� Injection with 4 safety injection pumps and 4 resid ual heat removal pumps (RHRP) from borated water storage tanks is availabl e

� All 8 accumulators are available

� Isolation of the 4 cold leg accumulators 500 s afte r reaching the emergency core cooling signal

� Failure to switch the RHRPs to the sump recirculati on mode

� Automatic secondary side cooldown (100 K/h) is not a vailable

� Main steam safety valves are available

� Emergency feed water system is available

� Failure of secondary side bleed and feed and primar y 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 penet ration of the biological shield

Visualization of 80 cm 2 MBLOCA

Visualization of a 80 cm 2

MBLOCA for a German PWR 1300 MW

Visualization of MELCOR results for SAMG training pu rposes – EMUG 2015 - Lejla Musanovic - 12/03/2015 -AREVA GmbH Proprietary - RESTRICTED AREVA - © AREVA - AL: N - ECCN: N - p.12

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Development and drawing of visualization pictures re quires a large effort

AREVA uses

� ATLAS (GRS tool) for all utilities

� TVP-viewer for E.ON

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

� e.g. 4 steam generators, although only 2 loops calc ulated

� 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 l onger envisioned in Germany

Summary and Conclusion

Visualization of MELCOR results for SAMG training pu rposes – EMUG 2015 - Lejla Musanovic - 12/03/2015 -AREVA GmbH Proprietary - RESTRICTED AREVA - © AREVA - AL: N - ECCN: N - p.13

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We acknowledge the contribution to this presentation from

Dr. Alfred Torri, Risk Management Associates, Inc.

Acknowledgment

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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 PurposesLejla Musanovic, Micha LöfflerSevere Accident Analyses, AREVA GmbHEMUG, March 17th–18th, 2015, Brussels