Institute of Physics, FI • Task 5 progress report (2006.02-09) • Outlook for the next period
A. Plukis (FI), 12-13.10.2006, LMU
FI contribution in subtask A • Benchmark on photon and neutron shielding data – NEA-1552 SINBAD ACCELERATOR Shielding Benchmark Experiments (www.nea.fr/abs/html/nea-1552.html)
• Code MCNPX (mcnpx.lanl.gov/ ) – ENDF-VI and LANL nuclear data libraries used
• Results satisfactory for EURISOL shielding calculations A. Plukis (FI), 12-13.10.2006, LMU
Neutron attenuation High energy neutron (up to 800 MeV) measurements in iron shields (HIMAC) • •
Measured spectra (HIMAC) M. Sasaki et. al, Nuc. Sci. E., Vol.141, No.2, pp. 140-152, 2002 Calculated with MCNPX 2.5.0
Ratio of HE neutron flux shielding by Fe layers Ratio
20cm /0cm
40cm /20cm
60cm /40cm
Exp
0.54
0.26
0.27
MCNPX
0.21
0.23
0.27
- Good agreement for shields of different thickness. - Some discrepancy between shielded and unshielded flux (possible saturation of detector ) A. Plukis (FI), 12-13.10.2006, LMU
ISIS800 •
•
Experimental Data of Deep-Penetration Neutrons through a Concrete and Iron Shield at the ISIS Spallation Neutron Source Facility using an 800-MeV Proton Beam, (T.Nunoniya et al, NIM B 179 (2001) 89-102,T.Nunoniya et al, KEK Report 2001-24) ISIS Facility, Rutherford Appleton Laboratory (RAL), United Kingdom
Shielding material
Ta
p 800MeV
A. Plukis (FI), 12-13.10.2006, LMU
12
C(n,2n) C 11
A. Plukis (FI), 12-13.10.2006, LMU
Neutron spectra 60 cm concrete
A. Plukis (FI), 12-13.10.2006, LMU
LIETDOS LIETDOS – a code created in the Institute of Physics (E.Maceika,
[email protected], V.Filistovic, T.Nedveckaite): •
Modeling of the environmental contamination with 130 different radionuclides (penetrated into environment from various sources, e.g. from Ignalina NPP, radioactive waste repository, in the case of terrorist attacks and etc.);
•
Prediction of the main foodstuffs and drinking water radiological contamination (in the cases of the accidental and routine releases of the radionuclides into environment);
•
Evaluation of the exposure doses for the different age groups of the population (from external and internal exposures and using deterministic or stochastic methods). A. Plukis (FI), 12-13.10.2006, LMU
Gaussian plume model in LIETDOS_AIR for the evaluation of the radionuclide transport and dispersion in atmosphere yer a l n sio Inver
axis d u o l C
rface u s nd Grou
Reflection
Depletion, deposition
Radionuclides of different forms (gases, aerosols, organic) can be dispersed in the atmosphere and deposited on the surface A. Plukis (FI), 12-13.10.2006, LMU
Pathways of radionuclides migration in biosphere modeled in LIETDOS_BIO Radioactive release
Radioactive deposition
Inhalation Inhalation External exposure
Contamination of feedstuffs and foodstuffs Internal exposure
A. Plukis (FI), 12-13.10.2006, LMU
Scheme of the dynamic model in LIETDOS_BIO Cloud shine
Inhalation
ATMOSPHERE Inhalation of the resuspended radionuclides Counter measure Top soil
Soil
Absorption Immobile fraction
Plant
Resuspension Weathering
Transfer Mobile fraction
Translocation Inte rnal plant
Root uptake
Washout
Plant surface
Deep soil
Be rrie s Mushrooms
Fish
…
Leafy vegetables Root crops Grain Pasture grass
Human food ration
Cattle fe e dstuffs ration Milk
Wall shie lding Be e f Pork Exte rnal e xposure
Inte rnal e xposure Total dose
A. Plukis (FI), 12-13.10.2006, LMU
Eurisol MW target Hg inventory source term by B.Rapp Relative contribution to external exposure effective dose
25.0% 22.5%
Largest contribution
20.0% 17.5%
Hg, 91mY
199m
15.0% 12.5% 10.0% 7.5% 5.0% 2.5% Hg -1 9 Y- 9m 91 Sc m -4 Y- 8 92 Zr -8 Y- 9 90 Ir- m 18 Ir- 8 18 Au 4 -1 Ta 98 -1 O 76 s1 Ir- 85 19 Hg 2 -2 Lu 03 -1 O 70 s1 Sc 81 Au 46 -2 Mo 00 -9 3 Ir- m 18 Re 2 -1 Re 80 -1 Lu 78 -1 Hf 72 -1 7 Ta 9m -1 Au 82 -1 Pt 94 -1 Ta 86 -1 Re 72 -1 Ir- 81 18 Sc 5 -4 7
0.0%
A. Plukis (FI), 12-13.10.2006, LMU
Eurisol MW target inventory Relative contribution to internal exposure effective dose due to inhalation 30.0%
Largest contribution
27.5% 25.0% 22.5%
Y, 90Sr,
91
20.0% 17.5% 15.0% 12.5% 10.0% 7.5% 5.0% 2.5% 0.0%
91 -90 48-89 90 72 92 8m 2m 82 70-47 98 9m-46 -45 04 99 8592 88 95 89 69-48 86 73 75 93 54 Y- Sr d-1Sr Y- Hf-1 Ir-1 f-17 -19 a-1 m-1Sc u-1f-17Sc Ca Tl-2 u-1 s-1 Y- t -1 u-1 Zr- b-1Sc e-1 u-1Hf-1 Zr- u-1 P A A H A O Y R L E G H Ir T T
A. Plukis (FI), 12-13.10.2006, LMU