Analysis of discrepancies between D1S and R2S results of 2016 DD JET Campaign

被引：3

作者：

Alguacil, J. ^{[1
]}

Catalan, J. P. ^{[1
]}

Sauvan, P. ^{[1
]}

Villari, R. ^{[2
]}

Batistoni, P. ^{[2
]}

Sanz, J. ^{[1
]}

机构：

[1] ETS Ingenieros Ind UNED, Dept Ingn Energet, Calle Juan del Ros Al 12, Madrid 28040, Spain

[2] ENEA, FSN Dept, Via E Fermi 45, I-00044 Rome, Italy

来源：

NUCLEAR FUSION | 2022年 / 62卷 / 09期

关键词：

rigorous-two-steps; direct-one-step; point-wise energy; group-wise energy; reaction rate; shutdown dose rate; decay gamma source; SHUTDOWN DOSE-RATE; NEUTRONICS; VALIDATION; PROGRAM;

D O I：

10.1088/1741-4326/ac7e5d

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

In the frame of the WPJET3-DT Technology project within the EUROfusion Consortium program, neutronics experiments are being carried out in preparation for the current deuterium-tritium campaign on JET (DTE2). The experiments are conducted to validate the neutronics codes and tools used in ITER, thus reducing the related uncertainties and the associated risks in the machine operation. Recently, the shutdown dose rate (SDR) results of the 2016 DD campaign have been analyzed using the D1S and R2S computational methodologies showing relevant differences between the results provided by both methods. The greatest discrepancies, found in the SDR calculated in the second octant at 6 h after shutdown, are a factor 2 of difference in the total decay photon flux and a different peak location close to 0.511 MeV. This article presents a detailed analysis of the D1S and R2S simulations performed to find the causes of these discrepancies. The conclusions of the analysis determine that the use of the typical neutron and gamma energy structures used in common R2S simulations can tend to a photon flux significant overestimation or a shift in the output spectrum, respectively. In addition to alerting about this important problem in R2S calculations, this article also proposes a solution to mitigate each effect that can be implemented in R2S codes. The application of the proposed solutions significantly reduces the differences between the photon spectrum calculated with D1S and R2S methods.

引用

页数：8

共 29 条

[1] Development of a methodology to estimate the statistical SDR uncertainty with R2S-UNED
Alguacil, J.
Sauvan, P.
Catalan, J. P.
Sanz, J.
[J]. FUSION ENGINEERING AND DESIGN, 2021, 168
[2] [Anonymous], 2020, VITAMIN J ENERGY STR
[3] Bailey G., 2021, UKAEACCFERE2102
[4] The JET technology program in support of ITER
Batistoni, P.
Likonen, J.
Bekris, N.
Brezinsek, S.
Coad, P.
Horton, L.
Matthews, G.
Rubel, M.
Sips, G.
Syme, B.
Widdowson, A.
[J]. FUSION ENGINEERING AND DESIGN, 2014, 89 (7-8) : 896 - 900
[5] Transmutation Approximations for the Application of Hybrid Monte Carlo/Deterministic Neutron Transport to Shutdown Dose Rate Analysis
Biondo, Elliott D.
Wilson, Paul P. H.
[J]. NUCLEAR SCIENCE AND ENGINEERING, 2017, 187 (01) : 27 - 48
[6] Rigorous MCNP based shutdown dose rate calculations: computational scheme, verification calculations and application to ITER
Chen, Y
Fischer, U
[J]. FUSION ENGINEERING AND DESIGN, 2002, 63-64 : 107 - 114
[7] Benchmarking the MCR2S system for high-resolution activation dose analysis in ITER
Davis, A.
Pampin, R.
[J]. FUSION ENGINEERING AND DESIGN, 2010, 85 (01) : 87 - 92
[8] Davis A., 2010, Radiation Shielding of Fusion Systems
[9] Methodological approach for DEMO neutronics in the European PPPT programme: Tools, data and analyses
Fischer, U.
Bachmann, C.
Catalan, J. P.
Eade, T.
Flammini, D.
Gilbert, M.
Jaboulay, J. -Ch.
Konobeev, A.
Leichtle, D.
Lu, L.
Malouch, F.
Moro, F.
Pereslavtsev, P.
Qiu, Y.
Sanz, J.
Sauvan, P.
Stankunas, G.
Travleev, A.
Turner, A.
Ogando, F.
Palermo, I.
Villari, R.
[J]. FUSION ENGINEERING AND DESIGN, 2017, 123 : 26 - 31
[10] REVIEW AND VALIDATION OF SHUTDOWN DOSE RATE ESTIMATION TECHNIQUES FOR APPLICATION TO ITER
Fischer, U.
Leichtle, D.
Serikov, A.
Pereslavtsev, P.
Villari, R.
[J]. FUSION SCIENCE AND TECHNOLOGY, 2013, 64 (03) : 563 - 570

← 1 2 3 →