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Release of Buildings and Sites at VKTA Rossendorf
Matthias BotheVerein für Kernverfahrenstechnik und Analytik Rossendorf e.V.
PF 510119, 01314 Dresden, [email protected]
Bothe: Release of Buildings and Sites at VKTA Rossendorf
research reactor Rossendorferwaste treatment
centre
isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre
stream
research reactor
isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Decommissioning complexes
Decommissioning complexes•Complex 1: Reactors
• Rossendorf Research Reactor (RFR)• Rossendorf Ring Core Reactor (RRR)• Rossendorf Assembly for Critical Experiments (RAKE)
•Complex 2: Isotope production facility•Complex 3: Waste treatment centre
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Rossendorf Research Reactor (RFR)
Rossendorf Research Reactor•light water modulated and cooled tank reactor (SU)•10 MWtherm•1014 ncm-2s-1
•1957 – 1991 (105 115 h operating time)•purposes:
• nuclear physics• reactor physics• safety research• neutron activation• production of neutron transmutation doped silicon
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Rossendorf Research Reactor (RFR)
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Rossendorf Research Reactor (RFR)
Bothe: Release of Buildings and Sites at VKTA Rossendorf
1962 –1991 maximal 1 kW
Rossendorf Ring Core Reactor (RRR)
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Isotope production facility•AMOR – Anlage zur Molybdän-Rückgewinnung
(facility for molybdenum recovery)• product: Mo-99 (decay to Tc-99m for radiopharmaceuticals)
•various nuclides for tracer experiments in industry•sealed sources
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production plant
Hot cell
Isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Co-60Cs-137Eu-152/154Sr-90
alpha beta gamma
Ra-226 H-3 Na-22U-isotopes C-14 Co-60Pu-isotopes Cl-36 Cs-134Am-241 Fe-55 Cs-137
Ni-63 Ba-133Sr-90/Y-90 Eu-152
Eu-154Eu-155
Relevant Radionuclides
Isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
FußwegKontrollbereichsgrenze
Gebäude 8d
Verbindungsgang
01
23
1
Stra
sse
K7
10
100
1000
Netto-Impulsraten [IPS]
Abbildung 1
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Fußweg
Strasse K1
Gebäude 8d
Verbindungsgang
RKS 11
RKS 12
RKS 7RKS 5
RKS 3RKS 8
RKS 4
RKS 1RKS 9
RKS 6
RKS 13RKS 2
RKS 10
RKS 14RKS 16
RKS 17
RKS 18
RKS 19
RKS 15
KontrollbereichsgrenzeAbbildung 2
Stra
sse
K7
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Außenbereich NO (2003)
0
20
40
60
80
100
0 0 0 1 10 100
Grenzwertausschöpfung uneingeschränkte Freigabe
Tief
e in
cm
MP 16-1 MP 17-1 MP 19-1 MP 16-2 MP 17-2 MP 19-2
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Isotope production facility
Bothe: Release of Buildings and Sites at VKTA Rossendorf
area between buildings
Bothe: Release of Buildings and Sites at VKTA Rossendorf
area between buildings
Bothe: Release of Buildings and Sites at VKTA Rossendorf
area between buildings
Bothe: Release of Buildings and Sites at VKTA Rossendorf
area between buildings
Bothe: Release of Buildings and Sites at VKTA Rossendorf
area between buildings: surface contamination measurement
Bothe: Release of Buildings and Sites at VKTA RossendorfCo-60 Cs-137 Eu-152 Eu-154
FE
B
A
CD
area between buildings: in-situ gamma-spectrometry
Bothe: Release of Buildings and Sites at VKTA Rossendorf
metal chip with Co-60
Bothe: Release of Buildings and Sites at VKTA Rossendorf
1310
O O
1410
1 15 153 10 25
16 2 15 2510 5 2515
O 2010
19 1525252525
17151025
54
71
2110
O
84
9 101 1
11
F
E
B
C
D
RKS 21
-200,00
-150,00
-100,00
-50,00
0,001 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
RKS 10
-200,0
-150,0
-100,0
-50,0
0,01 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
RKS 11
-200,0
-150,0
-100,0
-50,0
0,01 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
RKS 8
-200,0
-150,0
-100,0
-50,0
0,01 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
RKS 5
-200,0
-150,0
-100,0
-50,0
0,01 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
RKS 17
-200,0
-150,0
-100,0
-50,0
0,01 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
RKS 19
-200,0
-150,0
-100,0
-50,0
0,01 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
RKS 16
-200,0
-150,0
-100,0
-50,0
0,01 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
RKS 13
-200,0
-150,0
-100,0
-50,0
0,01 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
RKS 20
-200,0
-150,0
-100,0
-50,0
0,01 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
RKS 15
-200,0
-150,0
-100,0
-50,0
0,01 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
RKS 14
-200,0
-150,0
-100,0
-50,0
0,01 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
RKS 9
-200,0
-150,0
-100,0
-50,0
0,01 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
RKS 7
-200,0
-150,0
-100,0
-50,0
0,01 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
RKS 1
-200,0
-150,0
-100,0
-50,0
0,01 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
RKS 2
-250,0-200,0-150,0-100,0-50,00,0
50,01 10 100
Bruttozählrate [Ips]
Tiefe
[cm]
area between buildings: gamma-logging, sampling and analysis
25252525
3
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre
Waste treatment centre•treatment and storage of solid radioactive waste•collection, treatment, storage for decay of radioactive waste waters
• reactors• isotope production facility• radionuclide laboratories
•in operation 1957 - 1999
Bothe: Release of Buildings and Sites at VKTA Rossendorf
99
N
3 0 . 8
controlled arearea for release
neutralisation facilitystorage pond waste water
taks
solid waste storage
waste treatment centre
Bothe: Release of Buildings and Sites at VKTA Rossendorf
• Decommissioning complex 3Decommissioning complex 3Decommissioning complex 3Decommissioning complex 3
Bothe: Release of Buildings and Sites at VKTA Rossendorf
neutralisation facility
waste treatment centre
storage pond
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Grundwasserstand [GE97]
Geländeprofil
1
3
2
6 bzw. 7
4 bzw. 5
0 m2
6
9,4 m
77,5
0,5
1
6
2 4 bzw. 5
3
7
32,5 m20,5 m
contamination at storage pondwaste treatment centre
Bothe: Release of Buildings and Sites at VKTA Rossendorf
ground water level
ground surface 0 m
6 m
9,4 m
contamination sourcediffusearea
situation at storage pondwaste treatment centre
Bothe: Release of Buildings and Sites at VKTA Rossendorf
variability of specific activity [Bq/g]
nuclide contamination source diffuse area
Co-60 0,1 – 4,0 0,08 – 1,0Sr-90 0,3 – 0,5 0,3 – 9,0Cs-137 0,2 – 9,0 0,08 – 1,0
contamination: deep seated, difficult to accessactivity distribution: very heterogeneous, diffuse areas
contamination sources below the buildingnuclide vector: source: relatively uniform
soil profile: very variabletotal activity in the soil: ca. 500 MBq
waste treatment centre
situation at storage pond
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre
options:1.according GRPO § 29 (1)
• clearance levels of GRPO Annex III Table 1• total demolition of building structures• removal of huge amount of contaminated soil• release measurements after removal
2.new conception according GRPO § 29 (2)• release limits according de-minimis conception• release measurements of buildings in-situ• release measurements of soil around buildings
Bothe: Release of Buildings and Sites at VKTA Rossendorf
description of the area
radiological monitoring
after remediation
conception for determination of soil
contamination
model calculation for 10 µSv/a-release criterion
knowledge about radiological situation
waste treatment centre
establish site specific release limits
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre
establish site specific release values•additional conditions
• contouring of the area under consideration of• runoff of surface water• stability
•evaluation criteria• compliance with de-minimis-conception• technical feasibility• authorisation• costs• aspects of environmental and radiation protection
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre
establish site specific release limitsconditions in the new conception:•use limitations for 50 years (e.g. no agriculture) •removal of all tubes•release values as limits not as guidance•final status survey•inventory of Sr-90•internal release procedure•covering layer of unaffected soil•monitoring program for surface water and groundwater
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre
general clearance values and site specific release limitsnuclide Germ. Rad. Protect. Ordinance new conception
clearance values for unconditional clearance [Bq/g]
release limits for soil in-situ [Bq/g]
excavated soil(column 6)
soil surfaces(column 7)
near surface(< 30 cm)
subsurface(> 30 cm)
Co-60 0,09 0,03 0,64 90Sr-90 2 0,002 0,15 40Cs-137 0,4 0,06 0,20 2,80
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre
establish site specific release limitsAugust1999 discovery of contamination under the storage pondApril 2001 conception by VKTAApril 2002 expert opinionMay 2002 application of admission to authorityJune 2003 general confirmation from the authorityAugust 2003 allowance for the first remediation project
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste water neutralisation facility
• 1969 to 1999• clean radioactive water
with ion exchanger
waste treatment centre
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre – storage pond
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre – storage pond
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre – storage pond
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre – storage pond
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre – storage pond
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre – storage pond
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre – storage pond
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre – storage pond
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre – storage pond
Bothe: Release of Buildings and Sites at VKTA Rossendorf
waste treatment centre – storage pond
Bothe: Release of Buildings and Sites at VKTA Rossendorf
Thank you for attention!