Transcript TITLE

Preparing a decommissioning project
(part II)
H. Sterner
E. Thurow
Energiewerke Nord GmbH
1
H. Sterner; E. Thurow, EWN, chapter 3
Site reuse
Exemption from Atomic Law of site areas
Gr eif swalder Bodden
Gr eif swalder Bodden
Au
sla
u
fk
a
na
l
Einlauf r echenwer k
Gr eif swalder Bodden
ERA
Measurements
performed,
exempted
Measurements
performed, exemption
from Atomic Law
in progress
from
Atomic Law
Measurements
going
exemption
Measurements
going on, exemption
plannedon,
in 2002/03
planned in 2004
uf
la
Ein
100502
Übergabebauwerk
100102
Abgabe- Rückhaltebecken becken
Fund.
ELBW1
100505
Dienstgebäude
ELBW2
70/ 2
Büro - und
geschlossener
Auslauf kanal
T40
B32
Kläranlage
100103
Betriebs - und Sozialgebäude
ELBW
3
B31
ZWISCHENLAGER NORD ZLN
A10
A13
ZWAB
Maschinenhaus
Maschinenhaus
Südl. Anbau
B33
100504
Appar at ehaus III
Appar at ehaus II
Appar at ehaus I
BGB
100503
WACHGEBÄUDE
Notstrom
Appar at ehaus IV
Spez.-Geb.I
Sanilab.I
Spez.-Geb.II
ZAW
A7
GSG
Sanilab.II
Not st r om III
Par kplat z
Not st r om II
Schalt anlage
ZAB
68
CWA
A5
10
A
VWGI
B22
B35
A3
A11
A10
B37
A1
B20
B36
AKP2
Inakt ive
AKP1
A1
1
Wer kst at t
Fr eim
eßanlage
A18
B21
A19
A2
A104
A102
A101
A111
tz
Par kpla
%
%
VUW
0
r
G
if
e
s
100
500
ld
wa
1000
Met er
n
o
v
2
Kont r ollber eich
Gr enze bet r iebl.
Über wachungsber eich
Gr enze außer bet r iebl.
ZSA
Par kplat z
A103
Par kplat z
3
A1
A4
6
A
VWGII
A9
%
%
ULEGENDE
A1
6
A9
Par kplat z
A3
A12
Zent r .Dok.
A1
4
F+S Geb.
B
3
4
Or t slage
Spandower hagen
na
ch
Fund.
Free release measurement
of site area
l
na
ka
Über wachungsber eich
Fr
ee
st
Site reuse
Construction of harbour
3
Technical concept
Basic issues

main decommissioning and dismantling steps



dismantling principles
operational waste management
categorisation of systems/buildings/areas by radiological
classes
inventory





mass flow logistic (from dismantling)
necessary plant adaptation
main items of investments (new equipment)
special dismantling and disposal concept for highly
activated components

safe post operation, evaluation of the residual life time of
old equipment

possibilities to reduce operational costs
4
Technical concept
EWN table of content
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
Introduction
Site and buildings description
Present status
Decommissioning and dismantling activities
Decontamination methods
Emissions
Material flow and waste management
Radiological protection
Declassification
Necessary new installations and systems
Fire protection
Workers protection
Plant security
Infrastructure
Safety case
Environmental impact assessment
5
Technical concept
EWN - dismantling principles

as large components / parts as possible for treatment in
our warm workshop or interim storage

dismantling planning on system basis, execution on
room basis

start in unit 5; low contamination / dose rate

from low to high contamination / dose rate

use market equipment

in situ decontamination only for dose reduction
6
Technical concept
EWN - main direction of dismantling
7
Technical concept
Plant inventory
• Systems and other components on a room-by-room basis
• Masses and material types (on a room- and system-basis)
• Contamination in rooms and systems (including evaluation
of contamination penetration in concrete structures)
• Dose rates, including ambient rates in rooms, hot spots,
and at large components
• Hazardous materials (Asbestos, PCB etc.)
8
Technical concept
Categorisation by radiological classes
• Category I
- unrestricted material
• Category II - suspected material (an eventual
contamination cannot be excluded)
• Category III - contaminated material
9
Technical concept
Categorisation by radiological classes
EWN - example
Estimated mass ratio for contamination categories
in the turbine hall units 1 – 4
Category I
unrestricted material
ca. 45 %
Category II
suspected material
ca. 53 %
Category III
contaminated material
ca. 2 %
10
Technical concept
Classification of systems
I
Systems necessary for nuclear safety and/or
radiation protection
II
Systems necessary for industrial safety and/or
operation
III
Not necessary systems
11
Technical concept
WWER 440 - classification of systems
(example)
System Category
System
Unit
Post
Operation
Preparation
Safe
Enclosure
Safe
Enclosure
1, 2, 3, 4
I
I
I
water cleaning system 2 (SVO-2)
1/2
3/4
III
III
III
III
III
III
water cleaning system 3 (SVO-3)
including sewage water system
1/2
3/4
II
II
II
II
III
III
water cleaning system 4 (SVO-4)
1/2
3/4
II
II
III
III
III
III
steam generator facility
1, 2, 3, 4
III
III
III
steam generator blowdown system
1, 2, 3, 4
III
III
III
water cleaning system 5 (SVO-5)
1, 2, 3, 4
III
III
III
water cleaning system 6 (SVO-6)
1-4
III
III
III
solid radioactive waste store
1-4
I
I
III
liquid radioactive waste store
1-4
I
I
III
off-gas cleaning system
1/2
3/4
III
III
III
III
III
III
ventilation for reactor- and auxiliary
building
12
Remarks
Capacity reduction,
Adaptation and/or
Installation of new
Ventilation systems
removal solid waste
Technical concept
Waste and material management
• Fuel
• Operational waste
• Dismantled material
13
Technical concept
EWN - fuel management
14
Technical concept
EWN - fuel management
(state September 2004)
3 CASTOR (252)
unit 5
Fuel
pool
Reactor
unit 4
3 CASTOR-MOX (3)
unit 3
unit 2
unit 1
0
0
245
0
584
0
578
0
221
0
349
0
349
0
0
0
0
0
313
0
C - 30
235
unit 5
Fuel
pool
252
unit 4
unit 3
0
0
245
0
584
349
0
349
0
0
unit 2
0
unit 1
578
221
3
(defect)
Reactor
0
0
0
313
0
C - 30C
252 in 3 CASTOR 440/84 in the unit 3/4
Wet Storage
2398 4547
1990 1999
- 30
CASTOR
ZL N
I nter im Sto rage
235
Sale
(1996)
Wet Storage
2398 1607
ZLN
CASTOR
C - 30
Interim Storage
39 TLB CASTOR
(35 KGR; 4 KKR)
2940 KGR
1990
235
Sale
(1996)
2004
15
Technical concept
EWN – operational waste management
liguid evaporato
concentrates
solid radioactive
mixed waste
low-activated
resins
sludges from
outside the
controlled area
sludge-resin
mixtures
Treatment
rotational thin
film evaporator
planet
sorting and
compaction
facility
equipment for
drying of resins
drum drying
facility
equipment for
drying of resins
drum drying
facility
drum drying
facility
free classing
facility
buffer storage
Interim
Storage Nord
(ISN)
Interim
Storage Nord
(ISN)
Interim
Storage Nord
(ISN)
Interim
Storage Nord
(ISN)
disposal as radioactive waste
16
Interim
Storage Nord
(ISN)
disposal as
conventional waste
Technical concept
EWN - material management
Plant Greifswald site
1.800.000 Mg
Category I
Not contaminated
Ca. 1.235.000 Mg
Category II and III
Potentially contaminated and contaminated
Ca. 565.000 Mg
Plant parts
TH 1 – 6, IH 6
Ca. 50.000 Mg
Building
structures
Ca. 1.185.000 Mg
Concrete and
plant parts
Ca. 94.000 Mg
Remaining
building structures
Ca. 471.000 Mg
17
Technical concept
EWN - material management
Release measurement
18
Technical concept
Project structuring
Different structures depending on point of view
 Work breakdown
 Responsibility
 Objects
 Type of work
 Phases
19
Technical concept
EWN - Work breakdown
20