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Dose assessment and dose optimization using the VisiPlan 3D ALARA planning tool Examples

Dose assessment and dose optimization using the VisiPlan 3D ALARA planning tool Examples

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Page 1: Dose assessment and dose optimization using the VisiPlan 3D ALARA planning tool Examples

Dose assessment and dose optimization usingthe VisiPlan 3D ALARA planning tool

Examples

Page 2: Dose assessment and dose optimization using the VisiPlan 3D ALARA planning tool Examples

Example of decommissioning activitiesBR3 (1)

Geometric and material data takenfrom paper plans

Model Building and validation Comparison contacts

0.001

0.01

0.1

1

10

Tya

u br

un 1

Tya

u br

un 2

PR le

vel 7

GV

leve

l 7

GV

leve

l 3

PR le

vel 3

Spra

y ta

nk le

vel 3

SP M

95

PR s

urge

line

mix

ed b

ed

MC

1

MC

2

CL

MC

2

SPH

X

RC

206

0

Her

pi

PU 5

01 SC1

SC2

V17

V18

PU57

1

stra

iner

HD

T

floo

r

HD

TD

DT

tube

Sources

Dos

e (m

Sv/h

)

Metingen

VISIPLAN

Page 3: Dose assessment and dose optimization using the VisiPlan 3D ALARA planning tool Examples

Example of decommissioning activitiesBR3 (2)

A. Situation before the operations. B. Hot spot removal on level 0 m C. Hot spot removal around DDT lower part

D. Removal of the rotors. E. Removal of the SPHX F. Removal of the shutdown circuit

General planning

Page 4: Dose assessment and dose optimization using the VisiPlan 3D ALARA planning tool Examples

Example of decommissioning activitiesBR3 (3)

"Préparation" du chantier man h

obturation des fenêtres de la piscine RC (7) 2 5

Ventilation mobile BR2 3 8

Stand de découpe (installation / check) 3 4

Marquage tuyauteries 2 12

Modifications des circuits

Eau de service 2 10

Air comprimé

SOD 3 24

OD (niet) 2 10

Mise en sécurité NST 2 5

vase d'expansion 2 2

Démantèlement points chauds + autres opérations

Pompe MC n°2 2 2

Herpi's 2 2

Ligne collecte d'effluents 2 3

Déshabillage DDT supérieur 2 4

Déshabillage SPHx 2 4

Spray System 2 5

Déshabillage DDT inférieur (dont L.O. + HDT) 2 3

Piquages tuyauteries primaires 2 3

Déshabillage MBT + évacuation 2 4

Piquages GV 2 3

Démantèlement ligne N² 2 2

man h

Évacuation chemins de câbles 2 5

Montage échafaudages (firme extérieure)

niv - 4,805 m 4 6

sur balançoires MC 4 9

Modification état des boîtes à ressort

MK7 (GV) 3 12

Autres MK3 - MK6 (balançoires MC, TP) 3 12

Évacuation des rotors des pompes primaires 2 4

Évacuation des SPHx (optionnel) 2 5

Detailed planning

Page 5: Dose assessment and dose optimization using the VisiPlan 3D ALARA planning tool Examples

Example of decommissioning activitiesBR3 (4)

Total manµSv as a function of collective time

0

5000

10000

15000

20000

25000

0 500 1000 1500 2000

man.h

man

.µS

v

VISIPLAN

PV

Wihtout HS removal

HS removal SPHX not removed

Scenario comparison

Collective dose without dose reducing actions

Collective dose with Hot spot removal

Collective dose with Hot spot and Heat exchanger removal

Page 6: Dose assessment and dose optimization using the VisiPlan 3D ALARA planning tool Examples

Decommissioning of Cell 41 (SCK•CEN)

VisiPlan Dose prognoses : 21 man*mSvMeasured 26 man*mSv