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Roberto Capote, [email protected] IAEA Nuclear Data Section 1 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
International Atomic Energy Agency
Modelling with EMPIRE nuclear reaction code and
nuclear data evaluation
Roberto Capote, [email protected] IAEA Nuclear Data Section 2 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
� Background: ND for energy applications � New U-238 evaluation ¾ Nuclear reaction modelling in EMPIRE ¾ Differential data ¾ Integral and quasi-differential data
� Nuclear data validation using SPA cross sections and dosimetry libraries � Challenges
OUTLOOK
Roberto Capote, [email protected] IAEA Nuclear Data Section 3 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
OECD/NEA WPEC Subgroup 26 Final Report: “ Uncertainty and Target Accuracy Assessment for
Innovative Systems Using Recent Covariance Data Evaluations",
M. Salvatores (coordinator), R. Jacqmin (monitor), Technical report NEA No. 6410, OECD 2008.
Do we need another 238U evaluation?
The request for improved cross sections and emission spectra and their accuracies for neutron induced reactions on 238U is an important issue that emerges in several of cases studied. High accuracy requirements were placed on inelastic cross-sections 238U(n,inl) in the whole energy range up to 20 MeV …
A. Santamarina, ND-2013, target uncertainty 5% (current ~ 15%)
Roberto Capote, [email protected] IAEA Nuclear Data Section 4 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
IAEA STD 235U(n,f)
Rat
io to
IAE
A 23
5 U(n
,f) S
TD
±3V (2.4%)
Unc
ert [
%]
Evaluated 235U(n,f) vs. STD cross section
235U(n,f) SPA(252Cf) = 1224 ± 5 (0.4%)
Roberto Capote, [email protected] IAEA Nuclear Data Section 5 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
DOES EVAL.FISSION AGREES with STDs?
238U(n,f) SPA in 252Cf = 318.5 (0.6%)
~ 3.6% = 3V
Roberto Capote, [email protected] IAEA Nuclear Data Section 6 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
A.J. Plompen, T. Kawano and RC, Technical report INDC(NDS)-0597 ( IAEA,Vienna,2012) http://www-nds.iaea.org/publications/indc/indc-nds-0597.pdf
IAEA TM 2011
Roberto Capote, [email protected] IAEA Nuclear Data Section 7 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
A.J. Plompen, T. Kawano and RC, Technical report INDC(NDS)-0597 ( IAEA,Vienna,2012) http://www-nds.iaea.org/publications/indc/indc-nds-0597.pdf
238U(n,f) and 238U(n,J) – fitted in STD 238U(n,γ) SPA in 252Cf: 67.5 ± 0.7 mb (1.0%) 238U(n,f) SPA in 252Cf: 318.5 ± 2.1 mb (0.6%)
IAEA TM recommendations 238U(n,inl)
238U is the ideal test nucleus for elastic/inelastic studies
Roberto Capote, [email protected] IAEA Nuclear Data Section 8 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
First problem: Elastic and inelastic cross sections
Roberto Capote, [email protected] IAEA Nuclear Data Section 9 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
Continuum ~ 1.3 MeV Discrete Lev.
DISCREPANCIES in 238U(n,inl)
Roberto Capote, [email protected] IAEA Nuclear Data Section 10 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
DISCREPANCIES in 238U(n,inl)
Roberto Capote, [email protected] IAEA Nuclear Data Section 11 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
+ recent relevant modelling advances � Dispersive Lane consistent coupled-channel OMPs*: neutron inelastic scattering to discrete levels; � DIR-CN interference effects (as predicted by Moldauer); � neutron inelastic scattering treatment; � improved fission formalism (descriptive capability) *J.M. Quesada et al., EPJ Web of Conferences 42 02005 (2013) J.M. Quesada et al., ND2013 conference
Nuclear Data Sheets 108 (2007) 2655
Roberto Capote, [email protected] IAEA Nuclear Data Section 12 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
+ recent relevant modelling advances � Dispersive Lane consistent coupled-channel OMPs*: neutron inelastic scattering to discrete levels; � DIR-CN interference effects (as predicted by Moldauer); � neutron inelastic scattering treatment; � improved fission formalism (descriptive capability) *J.M. Quesada et al., EPJ Web of Conferences 42 02005 (2013) J.M. Quesada et al., ND2013 conference
Nuclear Data Sheets 108 (2007) 2655
Roberto Capote, [email protected] IAEA Nuclear Data Section 13 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
DCCOMP: rigid rotor with soft-rotor corrections
238U
Roberto Capote, [email protected] IAEA Nuclear Data Section 14 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
nonelastic cross sections
VR - V2+ - V4+
VR
Roberto Capote, [email protected] IAEA Nuclear Data Section 15 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
0.72 MeV 1.50 MeV 2.50 MeV 3.40 MeV 4.50 MeV
5.50 MeV 5.90 MeV 7.50 MeV 8.10 MeV 9.06 MeV
10.0 MeV 14.1 MeV
238U(n,el) 238U(n,scatt)
Roberto Capote, [email protected] IAEA Nuclear Data Section 16 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
Impact of octupolar band
Roberto Capote, [email protected] IAEA Nuclear Data Section 17 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
Inelastic angular distributions En=1.5 MeV
2+ 45 keV
4+ 148 keV
1- 680 keV
3- 732 keV
Roberto Capote, [email protected] IAEA Nuclear Data Section 18 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
total (and 1st lev) inelastic cross sections
CN-DIR Interf.
DCCOMP + mult. band coupling
Roberto Capote, [email protected] IAEA Nuclear Data Section 19 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
+ recent relevant modelling advances � Dispersive Lane consistent coupled-channel OMPs*: neutron inelastic scattering to discrete levels; � DIR-CN interference effects (as predicted by Moldauer); � neutron inelastic scattering treatment; � improved fission formalism (descriptive capability) *J.M. Quesada et al., EPJ Web of Conferences 42 02005 (2013) J.M. Quesada et al., ND2013 conference
Nuclear Data Sheets 108 (2007) 2655
Roberto Capote, [email protected] IAEA Nuclear Data Section 20 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
0.1 1
500
1000
1500
2000
2500
3000 dir-CN interference
elastic 1st level (44.9) 2nd level (148)
no interference elastic 1st level (44.9) 2nd level (148)
cros
s se
ctio
ns [m
b]
energy [MeV]
new physics: DIR-CN interference Engelbrecht-Weidenmuller
transformation [1]
[1] C.A. Engelbrecht, H.A. Weidenmuller, “Hauser--Feshbach theory and Ericson fluctuations in the presence of direct reactions”, Phys.Rev. C8 (1974) 859-862
(n,n1)
(n,el)
Roberto Capote, [email protected] IAEA Nuclear Data Section 21 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
+ recent relevant modelling advances � Dispersive Lane consistent coupled-channel OMPs*: neutron inelastic scattering to discrete levels; � DIR-CN interference effects (as predicted by Moldauer); � neutron inelastic scattering treatment; � improved fission formalism (descriptive capability) *J.M. Quesada et al., EPJ Web of Conferences 42 02005 (2013) J.M. Quesada et al., ND2013 conference
Nuclear Data Sheets 108 (2007) 2655
Roberto Capote, [email protected] IAEA Nuclear Data Section 22 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
elastic P-bar (P1 component)
Roberto Capote, [email protected] IAEA Nuclear Data Section 23 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
Elastic angular distribution 720 keV
impact on reflectors
Roberto Capote, [email protected] IAEA Nuclear Data Section 24 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
Neutron emission spectra (2-6 MeV)
2.03 MeV
4.25 MeV
6.02 MeV
Roberto Capote, [email protected] IAEA Nuclear Data Section 25 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
+ recent relevant modelling advances � Dispersive Lane consistent coupled-channel OMPs*: neutron inelastic scattering to discrete levels; � DIR-CN interference effects (as predicted by Moldauer); � neutron inelastic scattering treatment; � improved fission formalism (descriptive capability) *J.M. Quesada et al., EPJ Web of Conferences 42 02005 (2013) J.M. Quesada et al., ND2013 conference
Nuclear Data Sheets 108 (2007) 2655
Roberto Capote, [email protected] IAEA Nuclear Data Section 26 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
~ 0.9 MeV
The origin of the nuclear energy is the difference of binding energy
Hill-Wheeler formula for the Transmission coefficient through a parabolic barrier:
Transmission coefficients
Vf
E
Efi ħωi
Parabolic barrier
¸¹·
¨©§ ��
)E(E
ωπ *
fii
iT!
2exp1
1
FISSION PROCESS
Roberto Capote, [email protected] IAEA Nuclear Data Section 27 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
E
Vf
Vf
Vf
E
E
light actinides(Th)
medium actinides(Pu)
heavy actinides(Cf)
FISSION BARRIERS
Roberto Capote, [email protected] IAEA Nuclear Data Section 28 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
Vf
E
Vf
E
Vf
E
BA
Babsdir
inddirf
TTTTT
TTT
��
�
BCA
BCabsdir
inddirf
TTTTT
TTT
��
�
21 indind
dirf
TTTT�
�
imaginary part: ]*[ fVEW �� D
2
22
22 )1(
TTeTeTT dirabs
���
� GG
Roberto Capote, [email protected] IAEA Nuclear Data Section 29 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
30
Roberto Capote, [email protected] IAEA Nuclear Data Section 31 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
Using integral data (keff ) in the
evaluation
Roberto Capote, [email protected] IAEA Nuclear Data Section 32 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
NEA ICSBEP criticality benchmarks
Roberto Capote, [email protected] IAEA Nuclear Data Section 33 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
Using quasi-differential data in the evaluation
Roberto Capote, [email protected] IAEA Nuclear Data Section 34 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
RPI experimental setup
International Workshop on Elastic and Inelastic Scattering, WINS2012, Boston, 17-19 Sept. 2012
simple & easy to model geometry
Roberto Capote, [email protected] IAEA Nuclear Data Section 35 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
(n,f) (n,2n)
(n,el)
Angle dependent cross sections: 290
(n,n’) cont
Roberto Capote, [email protected] IAEA Nuclear Data Section 36 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
RPI benchmark: 290
Roberto Capote, [email protected] IAEA Nuclear Data Section 37 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
Angle dependent cross sections:1530
(n,n’) cont
(n,f)
(n,2n) (n,el)
Roberto Capote, [email protected] IAEA Nuclear Data Section 38 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
RPI benchmark: 1530
Roberto Capote, [email protected] IAEA Nuclear Data Section 39 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
OTHER CHALLENGES: PFNS
Roberto Capote, [email protected] IAEA Nuclear Data Section 40 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
OTHER CHALLENGES: 235U th.nubar
Frehaut & Shackleton p.201 www-nds.iaea.org/publications/proceedings/Physics-and-Chemistry-of-Fission-1973-Vol-II.pdf
Q(252Cf)=3.782
Roberto Capote, [email protected] IAEA Nuclear Data Section 41 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
� Reaction modelling of neutron scattering on 238U nucleus � Dispersive CC OMP coupling all levels up to En=1 MeV � Use of integral and quasi-differential benchmarks as part of the evaluation process � EMPIRE advanced Hauser-Feshbach treatment includes: � Dispersive coupled-channel optical models � CN anisotropy � Direct effects on the CN emission � Multi-humped fission barrier with absorption
� Additional data challenges: PFNS and nubar
SUMMARY
Roberto Capote, [email protected] IAEA Nuclear Data Section 42 Joint ICTP-IAEA Workshop on Nuclear Reaction Data
for nuclear power applications, 22-26 Sept. 2014, Trieste
![[] Hndbk for Calculation of Nuclear Reaction Data](https://img.pdfslide.net/doc/110x75/577cd0031a28ab9e78912c64/-hndbk-for-calculation-of-nuclear-reaction-data.jpg)
