Modelling with EMPIRE nuclear reaction code and nuclear data - - PowerPoint PPT Presentation

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Modelling with EMPIRE nuclear reaction code and nuclear data - - PowerPoint PPT Presentation

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International Atomic Energy Agency Modelling with EMPIRE nuclear reaction code and nuclear data evaluation Joint ICTP-IAEA Workshop on Nuclear Reaction Data Roberto Capote, r.capotenoy@iaea.org 1 for nuclear power applications , 22-26 Sept.

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Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section

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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

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Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section

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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

Nuclear reaction modelling in EMPIRE Differential data Integral and quasi-differential data

Nuclear data validation using SPA cross

sections and dosimetry libraries

Challenges

OUTLOOK

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Roberto Capote, r.capotenoy@iaea.org 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%)
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Roberto Capote, r.capotenoy@iaea.org 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)

Ratio to IAEA 235U(n,f) STD

±3

(2.4%)

Uncert [%]

Evaluated 235U(n,f) vs. STD cross section

235U(n,f) SPA(252Cf) = 1224 ± 5 (0.4%)

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SLIDE 5

Roberto Capote, r.capotenoy@iaea.org 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% = 3

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Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org 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,) – 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

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SLIDE 8

Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section

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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)

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SLIDE 10

Roberto Capote, r.capotenoy@iaea.org 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)

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Roberto Capote, r.capotenoy@iaea.org 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

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SLIDE 12

Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org 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

R - 2+ - 4+ R

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Roberto Capote, r.capotenoy@iaea.org 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)

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Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org 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

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SLIDE 18

Roberto Capote, r.capotenoy@iaea.org 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

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SLIDE 19

Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org 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 1

st level (44.9)

2

nd level (148)

no interference elastic 1

st level (44.9)

2

nd level (148)

cross sections [mb]

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)

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Roberto Capote, r.capotenoy@iaea.org 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

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SLIDE 22

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section

22 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

elastic -bar (P1 component)

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Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org 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

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SLIDE 25

Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org 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

  • f binding energy

Hill-Wheeler formula for the Transmission coefficient through a parabolic barrier:

Transmission coefficients

Vf

  • Efi ħωi

Parabolic barrier

  • )

E (E ω π

* fi i i

T

  • 2

exp 1 1

FISSION PROCESS

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Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section

27 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

  • V

f

V

f

V

f

  • light actinides

(Th) medium actinides (Pu) heavy actinides (Cf)

FISSION BARRIERS

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Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section

28 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

Vf

  • Vf
  • Vf
  • B

A B abs dir ind dir f

T T T T T T T T

  • BC

A BC abs dir ind dir f

T T T T T T T T

  • 2

1 ind ind dir f

T T T T

  • imaginary part:

] * [

f

V E W

  • 2

2 2 2 2

) 1 ( T T e T e T T

dir abs

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Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section

29 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

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30

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Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org 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)

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SLIDE 38

Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org 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

(252Cf)=3.782

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Roberto Capote, r.capotenoy@iaea.org 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

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Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section

42 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste