Benchmark test with OKTAVIAN data and Comment on kerma factor Yukinobu Watanabe Department of Advanced Energy Engineering Science, Kyushu University 3nd.

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Presentation transcript:

Benchmark test with OKTAVIAN data and Comment on kerma factor Yukinobu Watanabe Department of Advanced Energy Engineering Science, Kyushu University 3nd RCM of CRP on FENDL-3, 6-10 December 2011

Contents Action assignment in 2 nd RCM : Si and Sn Benchmark test using OKTAVIAN data (by C. Konno) Comment on KERMA factor in FENDL/MC-2.1 & FENDL/MG-2.1 (from C. Konno)

Assignment-1: Si isotopes Keep from ENDF/B-VII, but check and consider using the new JENDL evaluation due to unsatisfactory benchmark results. In summary report from the 2 nd RCM; INDC(NDS)-0567 (2010) C. Konno et al., “Benchmark Test of JENDL-4.0 Based on Integral Experiments at JAEA/FNS” presented at Joint Int. Conf. on Supercomputing in Nuclear Applications + Monte Carlo 2010, October 17-21, 2010, Tokyo, Japan.

JAEA/FNS FNS SiC TOF Experiment - (1)

JAEA/FNS FNS SiC TOF Experiment - (2)

JAEA/FNS FNS SiC In-situ Experiment - (3)

JAEA/FNS FNS SiC In-situ Experiment - (4) Reference : C. Konno et al., “Benchmark Test of JENDL-4.0 Based on Integral Experiments at JAEA/FNS” presented at Joint Int. Conf. on Supercomputing in Nuclear Applications + Monte Carlo 2010, October 17-21, 2010, Tokyo, Japan.

Conclusion on Si From the result of this benchmark, I cannot find a reasonable reason to adapt JENDL-4.0 instead of ENDF/B-VII. Therefore, it would be better to keep ENDF/B-VII for Si isotopes in FENDL-3.0. By YW Jan. 18, 2011

Si FENDL-3 (SLIB2) : ENDF/B-VII.0 JENDL-4 is slightly better than the others.

Assigment-2: Sn isotopes Isotopic evaluations from RUSFOND files (or JENDL-4 if available) to be joined to TENDL at E > 20 MeV. Otherwise use TENDL only. Action on Watanabe to justify switch to JENDL-4. In summary report from the 2 nd RCM; INDC(NDS)-0567 (2010) The data of Sn isotopes in RUSFOND are taken from ENDF/B-VII and both data are same.

Sn isotopes Since there is no integral benchmark test for Sn isotopes, our optimum selection of evaluated library should be based on only comparison of differential data. Here we focus on  -ray production cross sections, because they are important to estimate the influence of  -ray heating on superconducting coil (Nb 3 Sn) for nuclear fusion technology. ENDF/B-VII.0, RUSFOND, TENDL-2010, and JENDL-4.0 are compared with available experimental data.

114 Sn(n,  )

115 Sn(n,  )

116 Sn(n,  )

117 Sn(n,  )

118 Sn(n,  )

119 Sn(n,  )

120 Sn(n,  )

122 Sn(n,  )

124 Sn(n,  )

 -ray emission spectra of natural Sn

Results JENDL-4.0 is in slightly better agreement with the experimental (n,  ) data of 112,114,116 Sn than the other evaluations. All the evaluations for 118,120 Sn reproduce the measurements to similar extent. As for 122,124 Sn, JENDL-4.0 is better than RUSFOND (i.e., ENDF/B- VII.0). Thus, as far as the (n,  ) cross sections are concerned, the JENDL-4.0 looks superior to RUSFOND and TENDL Gamma-ray emission spectra of natural Sn at 4.75 and MeV incident energies are shown with JENDL-4 data and measurements. A comparison with TENDL-2010 is also presented. The data of JENDL-4 agrees with the measurements better than that of TENDL-2010.

Conclusion on Sn I recommend that we should adapt JENDL-4.0 instead of RUSFOND at energies below 20 MeV. Since there is no high energy data of JENDL for Sn isotopes, TENDL-2010 should be connected with JENDL-4.0 at 20 MeV. By YW Jan. 18, 2011

Contents Action assignment in 2 nd RCM : Si and Sn Benchmark test using OKTAVIAN data (by C. Konno) Comment on KERMA factor in FENDL/MC-2.1 & FENDL/MG-2.1 (from C. Konno)

Benchmark Test using OKTAVIAN data Benchmark test was done by FNS/JAEA using MCNP-5.14 code Presented at 2011 symposium on nuclear data, Nov. 2011, Tokai, Japan Measurement of leakage neutron spectrum from a spherical pile with incident 14 MeV neutrons

Si FENDL-3 (SLIB2): ENDF/B-VII.0

Cu FENDL-3 (SLIB2) ENDF/B-VII

Zr FENDL-3 (SLIB2): JENDL/HE

Nb FENDL-3 (SLIB2): JENDL/HE

Mo FENDL-3 (SLIB2): JENDL/HE

W FENDL-3 (SLIB2): IAEA

Contents Reply to assignments in 2 nd RCM : Si and Sn Benchmark test using OKTAVIAN data KERMA factor in FENDL/MC-2.1 & FENDL/MG-2.1

JAEA/FNS KERMA factor in FENDL/MC-2.1 and FENDL/MG-2.1 JAEA C. Konno

JAEA/FNS Neutron KERMA in FENDL-2.1  Neutron KERMA factors are stored in FENDL/MC-2.1 (ACE file) and FENDL/MG-2.1 (MATXS file), not in FENDL/E-2.1.  Pointwise neutron KERMA factors in FENDL/MC-2.1 are deduced with the energy balance method in the heatr module of the NJOY code. They are used for tally F6 in MCNP.  Two neutron KERMA factors of 175 groups, “heat” and “kerma”, are stored in FENDL/MG-2.1. “heat” is deduced with the energy balance method in NJOY heatr, while “kerma” is deduced with the kinematic method in NJOY heatr. Note that “kerma” is an upper limit of KERMA and that “heat” should be less than “kerma”. They are extracted with the TRANSX code and are used as response data for heating calculation with Sn codes.

JAEA/FNS Problem in Neutron KERMA in FENDL-2.1  As well known, the energy balance method gives inadequate KERMA, e.g. negative KERMA, if the total energy is not conserved inside nuclear data. In this case the kinematic method should be adopted.  This problem appears in 28 nuclei of FENDL/MC-2.1 (see next slides). -Au-197, Bi-209, Fe-56, Ga-nat, Mn-55, Mo-92, Mo- 94, Mo-95, Mo-96, Mo-97, Mo-98, Mo-100, N-14, Nb- 93, P-31, Sn-nat, Ta-181, Ti-46, Ti-47, Ti-48, Ti-49, Ti-50, V-nat, W-182, W-183, W-184, W-186, Zn-96  We would like to propose that this problem should be resolved in FENDL/MC-3.0.

JAEA/FNS Inadequate KERMA in FENDL-2.1 -(1)

JAEA/FNS Inadequate KERMA in FENDL-2.1 -(2)

JAEA/FNS Inadequate KERMA in FENDL-2.1 -(3)

JAEA/FNS Inadequate KERMA in FENDL-2.1 -(4)

JAEA/FNS Inadequate KERMA in FENDL-2.1 -(5)

JAEA/FNS Inadequate KERMA in FENDL-2.1 -(6)

JAEA/FNS Inadequate KERMA in FENDL-2.1 -(7)

JAEA/FNS Proposal concerning neutron KERMA  The energy balance method gives inadequate KERMA, e.g. negative KERMA, if the total energy is not conserved inside nuclear data. In this case the kinematic method should be adopted.  This problem appears in 28 nuclei of FENDL/MC-2.1 : -Au-197, Bi-209, Fe-56, Ga-nat, Mn-55, Mo-92, Mo-94, Mo-95, Mo-96, Mo-97, Mo-98, Mo-100, N-14, Nb-93, P-31, Sn-nat, Ta-181, Ti-46, Ti-47, Ti-48, Ti-49, Ti-50, V-nat, W-182, W-183, W-184, W-186, Zn-96  This problem should be resolved in processing of FENDL/MC-3.0.

Appendix

114 Sn(n,tot)

118 Sn(n,tot)

120 Sn(n,tot)