Hydrogen diffusion under stress in Zircaloy: High-resolution neutron radiography and finite element modeling

Gong, Weijia; Trtik, Pavel; Valance, Stéphane; Bertsch, Johannes

doi:10.1016/j.jnucmat.2018.05.079

Cited by 22 publications

(6 citation statements)

References 25 publications

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“…2. Related hydride distribution and accumulation effects have been reported in [11,12]. In the presented neutron images hydrides appear as thin darker lines in the substrate and higher hydride concentrations are located at the liner-substrate interface.…”

Section: Please Cite This Article As Doi:101063/15143226supporting

confidence: 70%

“…In addition, high-resolution neutron radiography was used to quantify the hydrogen diffusion under stress in a Zircaloy-4 [12]. However, none of the samples investigated in the publications [6][7][8][9][10][11][12] have been irradiated and were thus not radioactive. Consequently, the mentioned results reflect neither the effects of irradiation-induced damage nor the influence of the heat flux through a fuel cladding being operated in a nuclear reactor.…”

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confidence: 99%

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Sample container for high-resolution neutron imaging of spent nuclear fuel cladding sections

Trtik

Zubler

Gong

et al. 2020

Review of Scientific Instruments

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Section: Please Cite This Article As Doi:101063/15143226supporting

confidence: 70%

mentioning

confidence: 99%

Sample container for high-resolution neutron imaging of spent nuclear fuel cladding sections

Trtik

Zubler

Gong

et al. 2020

Review of Scientific Instruments

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“…Subsequently, after assessing the resolution experimentally, several small static samples were tomographed. The tomographed samples included pieces of Zircaloy nuclear fuel cladding [19], bits of additively manufactured gold alloys, and a cylinder of a diameter of approximately 2.5 mm of a gold-lead alloy.…”

Section: Figure 2 -(Left) Neutron Radiography Of a Gd Based Siemens Smentioning

confidence: 99%

PSI ‘Neutron Microscope’ at ILL-D50 Beamline - First Results

Trtik

Meyer²,

Wehmann³

et al. 2020

Neutron Radiography - WCNR-11

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A high-resolution neutron imaging system referred to as 'Neutron Microscope' (NM) has been recently established as a piece of instrumental equipment at the Paul Scherrer Institut (PSI), Switzerland. It is providing the wide user community of the Neutron Imaging and Applied Materials Group (NIAG) with the capability of spatial image resolution below 5 µm at effective pixel sizes of 1.3 µm. The NM has been designed as a portable, self-contained system that can be moved between beamlines at PSI with only moderate effort. In this contribution, we report on the first results and experience with the Neutron Microscope externally, at a beamline of another neutron source outside the Swiss Spallation Neutron Source (SINQ). In June 2018, NM has been transported to the Institute Laue-Langevin (ILL) and was successfully installed at the D50 beamline for four days. A gadolinium based Siemens star produced at PSI has been used for the assessment of the spatial resolution. The spatial resolution achieved using the Neutron Microscope at ILL-D50 equalled 4.5 µm. Above that, several high-resolution tomographies of various samples were acquired, of which an illustrative example is presented.

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“…Neutron imaging is a powerful tool for the investigation of hydrogen in zirconium alloys because the macroscopic total neutron cross section of hydrides can be up to 2500% compared with one of the typical zirconium alloys applied as cladding material. Several groups worldwide applied neutron imaging for such investigations during the last years [4][5][6][7][8][9][10][11][12][13][14]. However, only few investigations were performed in situ.…”

Section: Introductionmentioning

confidence: 99%

“…Several groups worldwide work on these fields. The first results have already been achieved (for instance, [12,20]). However, all these processes are not yet completely understood and quantified to develop precise models predicting the cladding tube state after long-term storage of nuclear fuel.…”

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confidence: 99%

In Situ Neutron Radiography Investigations of Hydrogen Related Processes in Zirconium Alloys

2021

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In situ neutron radiography experiments can provide information about diffusive processes and the kinetics of chemical reactions. The paper discusses requirements for such investigations. As examples of the zirconium alloy Zircaloy-4, the hydrogen diffusion, the hydrogen uptake during high-temperature oxidation in steam, and the reaction in nitrogen/steam and air/steam atmospheres, results of in situ neutron radiography investigations are reviewed, and their benefit is discussed.

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Hydrogen diffusion under stress in Zircaloy: High-resolution neutron radiography and finite element modeling

Cited by 22 publications

References 25 publications

Sample container for high-resolution neutron imaging of spent nuclear fuel cladding sections

Sample container for high-resolution neutron imaging of spent nuclear fuel cladding sections

PSI ‘Neutron Microscope’ at ILL-D50 Beamline - First Results

In Situ Neutron Radiography Investigations of Hydrogen Related Processes in Zirconium Alloys

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