activation studies on benefit of the selection of the ess target concept
DESCRIPTION
Activation studies on benefit of the selection of the ESS target concept. D. Ene. M. P. W. Chin. C. Kharoua. E. Noah. F. Plewinski ESSS-AB. Stora Algatan 4. Lund. Sweden. ESS in Lund. Goal. Development of a method to be used for residual field estimation for target - PowerPoint PPT PresentationTRANSCRIPT
D. Ene. M. P. W. Chin. C. Kharoua. E. Noah. F. Plewinski
ESSS-AB. Stora Algatan 4. Lund. Sweden
[email protected] SATIF 2010 CERN, Geneva 2-4 of June 2010 2
[email protected] SATIF 2010 CERN, Geneva 2-4 of June 2010 3
-Development of a method to be used for residual field estimation for target and its surroundings. Selection of the appropriate approach for the optimized model estimates.
-Rough estimates for order of magnitude evaluations. Global amounts are analyzed.
-Investigation of the influence of various parameters: -proton beam energy; -target material; -complexity of the geometry model.
irradiation history, beam profile. etc
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Neutron flux in ith cell
⇨The neutron flux is assumed to be constant over the irradiation period and not being modified by the irradiated medium
Geometryand materialsdescription PHITS/
MCNPX
Residues in ith cell
Irradiation Scheme-
H*(10)MCNPX
Activation products&Photon sources
40 y irradiation @5000h
DCHAIN-SP-2001/CINDER
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Proton beam:Gauss :2x = 10 cm 2y =3 cmE= 2.5GeV | ( 1-4) GeV
Target materials: Hg. PbBi. PbAu. W (Ta claded)Target vessel: SS316Moderator clad: AlBeam window: AlMg3
Irradiation history:38 y 5 MW @ 5000h5000 h 5MW3678 h 05000 h 5 MW
Normalization : 5 MW
Moderators: L-H2
R=16cm. H=20cm
Preliminary results
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Hg target
Hg target
Reflector configuration
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SS vessel
Al cladAl clad
SS vessel
59Ni, 14C, 93Mo,91Nb
51Cr, 55Fe, 3H,54Mn
3H, 51Cr, 55Fe,63Ni, 60Co
3H
28Al
26Al, 14C
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T#1
T#1
198Au. 187W (n.) (JEF2.2) ?
T#1
194Hg-194Au208Bi202Pb163Ho. 191Nb. 93Mo
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Hg PbBi PbAu W
nuclide [Bq/cc] [%] nuclide [Bq/cc] [%] nuclide [Bq/cc] [%] nuclide [Bq/cc] [%]
Tl204 2.08E+16 52.06 H 3 1.74E+16 43.22 1 H 3 2.0132E+16 84.85 W 185 2.72E+16 31.82
H 3 1.65E+16 41.34 Bi207 8.25E+15 20.46 2 Au195 1.4671E+15 6.18 H 3 2.27E+16 26.62
Hg203 7.12E+14 1.78 Pb207m 6.95E+15 17.22 3 Tl204 1.2087E+15 5.90 W 181 2.23E+16 26.10
Au195 6.15E+14 1.54 Po210 5.89E+15 14.60 4 Pt193 1.6217E+14 0.68 Ta182 5.95E+15 6.97
Pt193 3.42E+14 0.85 Tl204 1.20E+15 2.98 5 Ta179 4.6096E+13 0.19 Ta179 2.63E+15 3.07
Ta179 6.89E+13 0.17 Au195 1.33E+14 0.33 6 Bi207 4.2933E+13 0.18 Os185 1.09E+15 1.28
Lu172 5.32E+13 0.13 Po208 5.31E+13 0.13 7 Lu172 3.9563E+13 0.17 Lu173 5.57E+14 0.65
Lu172m 5.27E+13 0.13 Pt193 2.68E+13 0.07 8 Lu172m 3.9175E+13 0.17 Lu172 4.79E+14 0.56
Hf172 5.27E+13 0.13 Lu172 2.35E+13 0.06 9 Hf172 3.9175E+13 0.17 Lu172m 4.75E+14 0.56
Lu173 5.00E+13 0.12 Lu172m 2.33E+13 0.06 10 Lu173 3.7881E+13 0.16 Hf172 4.75E+14 0.56
Activation | TOP 10 @ 1 y
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•Changing the proton beam energy while maintaining the same beam power does not change substantially the total radioactivity in the target material
•Induced radioactivity and decay heat depend on the target material. Large differences occur mainly for those materials where the thermal neutron activation is the dominant factor.
•Contribution of moderators and reflector has to be accounted since the early design phase.
•Analysis of the differences obtained by using various tools to be continued.
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