Nuclear data for D1SUNED for the study of ITER planned in-situ maintenance dose scenarios

Pedroche, G.; Sauvan, P.; Alguacil, J.; Sanz, J.; Juárez, R.

doi:10.1016/j.fusengdes.2021.112646

Cited by 8 publications

(3 citation statements)

References 11 publications

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“…All radiation sources have been computed with D1SUNED methodology. Activation calculations were performed with ACAB code 15 to select the pathways leading to the formation of the 99% of radioisotopes contributing at least 99% of the contact dose rate 16 . In general, FENDL 3.1c/d 17 was used for neutron transport, while EAF2007 18 was used for activation and photon transport.…”

Section: Methodsmentioning

confidence: 99%

Assessment of ITER radiation environment during the remote-handling operation of In-Vessel components with D1SUNED

Martínez-Albertos

Sauvan

Loughlin

et al. 2023

Sci Rep

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During ITER operational life, a remote-handled cask will be used to transfer In-Vessel components to the Hot Cell for maintenance, storage and decommissioning purposes. Due to the distribution of penetrations for system allocation in the facility, the radiation field of each transfer operation presents a high spatial variability; all operations must be studied independently for workers and electronics protection. In this paper, we present a fully representative approach to describe the radiation environment during the complete remote-handling scenario of In-Vessel components in the ITER facility. The impact of all relevant radiation sources during different stages of the operation is addressed. As-built structures and 2020 baseline designs are considered to produce the most detailed neutronics model of the Tokamak Complex, the 400,000-tonne civil structure hosting the tokamak, up to date. Novel capabilities of the D1SUNED code have allowed to compute the integral dose, the dose rate and the photon-induced neutron flux of both moving and static radiation sources. Time bins are included in the simulations to compute the dose rate caused by In-Vessel components at all positions along the transfer. The time evolution of the dose rate is built in video format with a 1-m resolution, especially valuable for hot-spots identification.

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Section: Methodsmentioning

confidence: 99%

Assessment of ITER radiation environment during the remote-handling operation of In-Vessel components with D1SUNED

Martínez-Albertos

Sauvan

Loughlin

et al. 2023

Sci Rep

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“…The activation was performed, in both cases, using the EAF2007 [20] activation cross-section library. Note that D1S-UNED uses its own libraries which combine these transport and activation libraries [21].…”

Section: Nuclear Datamentioning

confidence: 99%

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

Alguacil¹,

Catalán²,

Sauvan³

et al. 2022

Nucl. Fusion

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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.

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“…In a fusion reactor, the nuclear reaction between neutron and 27 Al will produce 24 Na and α particles. 24 Na has a very short half-life (15 h), and the initial inventory of 10 9 Ci decays to negligible levels (100 Ci) in ten days [19,20]. The only significant long-lived activity will be 26 Al (740 000 years half-life), but the specific activity will be very low (approximately 1 Ci per metric ton) [19].…”

Section: Introductionmentioning

confidence: 99%

Au-ion irradiation effects on microstructure and deuterium permeation resistance of Al/Al₂O₃ coating

Zhang¹,

Deng²,

Zhu³

et al. 2022

Nucl. Fusion

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Al/Al2O3 coating with a total thickness of approximately 3 μm was irradiated by 6 MeV Au-ions with the damage level from 13 to 39 dpa at room temperature. The results showed that the surface roughness of the Al/Al2O3 coating decreased with increasing irradiation damage levels. As the irradiation damage level is up to 39 dpa, the crystallinity of the Al2O3 layer is enhanced, and the irradiation-induced defects such as voids and dislocations appeared in the Al/Al2O3 coating. The decreased hardness and the deterioration of deuterium permeation resistance are strongly associated with the changed microstructure. The underlying mechanism for the evolution of microstructure and properties induced by Au-ions irradiation is discussed.

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Nuclear data for D1SUNED for the study of ITER planned in-situ maintenance dose scenarios

Cited by 8 publications

References 11 publications

Assessment of ITER radiation environment during the remote-handling operation of In-Vessel components with D1SUNED

Assessment of ITER radiation environment during the remote-handling operation of In-Vessel components with D1SUNED

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

Au-ion irradiation effects on microstructure and deuterium permeation resistance of Al/Al₂O₃ coating

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Nuclear data for D1SUNED for the study of ITER planned in-situ maintenance dose scenarios

Cited by 8 publications

References 11 publications

Assessment of ITER radiation environment during the remote-handling operation of In-Vessel components with D1SUNED

Assessment of ITER radiation environment during the remote-handling operation of In-Vessel components with D1SUNED

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

Au-ion irradiation effects on microstructure and deuterium permeation resistance of Al/Al2O3 coating

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Product

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Au-ion irradiation effects on microstructure and deuterium permeation resistance of Al/Al₂O₃ coating