Évolution des espèces produites par le ralentissement de protons rapides dans l’eau liquide : simulation fondée sur l’approximation des temps de réaction indépendants

Frongillo, Y.; Fraser, M.‐J.; Cobut, V.; Goulet, T.; Jay‐Gerin, Jean‐Paul; Patau, J.P.

doi:10.1051/jcp/1996930093

Cited by 60 publications

(72 citation statements)

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“…Thermalization distance (r th ) of subexcitation electrons [4,[12][13][14] at 300 ο C (the transport of excitation electrons in water from their initial energies until they become thermalized, ~7.3 eV in liquids water), was adjusted by the previous author to bring the present simulation results and their computed data into good concurrence. The corrected primary yields were − aq e and H…”

Section: Thermalization Distancementioning

confidence: 99%

“…The detailed description of present MonteCarlo modeling for radiolysis of liquid water has been written elsewhere [1][2][3][4][5][6][7][8][9][10]. To reproduce the effect of 60 Co γ-ray radiolysis and fast electrons, 150 ions, ~150µm short track segments of 300MeV protons (where the average LET value obtained by the simulations is ~0.3 keV/µm at 25 ο C, which is similar to the LET of 60 Co γ-ray) [11] and end track length of 0.5~1.5µm for temperature range of 25~325 ο C were applied.…”

Section: Monte-carlo Simulationmentioning

confidence: 99%

“…The value of 1.331×10 9 m 2 s -1 was applied for the diffusion coefficient of HSO 4 − at 25 ο C. The closest value of 1.5×10…”

Section: For 04m H 2 So 4 Solutionmentioning

confidence: 99%

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Monte-Carlo Simulation of γ-ray and Fast Neutron Radiolysis of Liquid Water and 0.4 M H2SO4 Solutions at Temperatures up to 325oC

2011

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Monte-Carlo simulations were used to study the radiolysis of liquid water at ο C when subjected to low linear energy transfer (LET) of 60 Co γ-ray radiation and fast neutrons of 2 and 0.8 MeV. The energy deposited in the early stage of 60 Co γ-ray irradiation was approximated by considering short segments (~150 µm) of 300 MeV proton tracks, corresponding to an average LET of ~0.3 keV/µm. In case of 2 MeV fast neutrons, the energy deposited was considered by using short segments (~5 µm) of energy at 1.264, 0.465, 0.171, 0.063 and 0.24 MeV. 0.8 MeV fast neutrons were approximated by 0.505, 0.186, 0.069 and 0.025 MeV protons. The effect of 0.4 M H 2 SO 4 solution on radiolysis was also studied by this method for both 60 Co γ-rays and 0.8 MeV fast neutrons. The simulated results at the time of 10 -7 s after irradiation were obtained and compared with the available experimental results published by other researchers to be in excellent agreement with them over the entire temperature ranges and radiation sources studied. Except for g(H 2 ) that increase with temperature rises, the general behaviors of higher radical products and lower molecular products at higher temperatures were obtained. The LET effect is also validated by this study, showing that the increase in LET would yield higher molecular and lower radical products. Studies on 0.4 M H 2 SO 4 solutions also show good agreement between the computed and experimental data for γ-ray irrradiation: the presence of 0.4 M H + , except for g(H 2 ) that gives lower value at 25 ο C and higher value at 325 ο C, gives the higher values for radicals and g(H 2 O 2 ) at 25 ο C and lower values at 325 ο C, compared with that for neutral water. The computed data show good agreement with the experimental data for 0.4 M H 2 SO 4 solutions induced by 0.8 MeV fast neutrons, except for g(H 2 ) and g(H •) that gives good agreement up to 50 ο C, then the opposite tendencies with the further temperature rises. However, the simulated fast neutron radiolysis on acidic demonstrates similar tendencies on temperature dependence with that for simulated 60 Co γ-radiolysis, but in different magnitude. For better understanding, more experimental data for fast neutrons are needed, especially under the acidic conditions.

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Section: Thermalization Distancementioning

confidence: 99%

Section: Monte-carlo Simulationmentioning

confidence: 99%

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Monte-Carlo Simulation of γ-ray and Fast Neutron Radiolysis of Liquid Water and 0.4 M H2SO4 Solutions at Temperatures up to 325oC

2011

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“…To reduce statistical fluctuations, the calculated quantities were averaged over several simulated impacts whatever the incident projectile was. The principle of our simulation is largely inspired by numerous works [21][22][23][24]. A detailed description can be found in [25,26].…”

Section: Monte Carlo Simulationmentioning

confidence: 99%

O₂and glutathione effects on water radiolysis:a simulation study

Colliaux¹,

Gervais²,

Rodriguez-Lafrasse³

et al. 2011

J. Phys.: Conf. Ser.

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“…In existing nuclear reactors, chemicals are added to the coolant to remove H 2 O 2 . Computer simulations such as Monte Carlo simulations [5,6] are utilized to determine the type and amount of chemicals to add. The final fate of a particular radiolysis species depends heavily on how fast different species react [7].…”

Section: Introductionmentioning

confidence: 99%

Supercritical Water Experimental Setup for µSR

Liu

Chen

Morrison

et al. 2018

Proceedings of the 14th International Conference on Muon Spin Rotation, Relaxation and Resonance (ΜSR2017)

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The Canadian design for Generation IV nuclear reactors uses supercritical water (SCW, water above its critical point of 374 °C, 221 bar (1 bar = 100 kPa)) as the coolant. Supercritical watercooled reactors (SCWRs) are designed towards sustainability, economic benefits, improved safety, and longer lifespan. Despite the potential advantages of SCWRs, we know very little about the kinetics of radiolysis products that are formed in them because of the limitations of experimental instruments under the extreme conditions of SCW. The radiolysis products can accumulate over time and create a very corrosive environment. Our group has developed and tested an apparatus suitable for muon spin rotation (µSR) studies of water and aqueous solutions up to 550 °C and 250 bar, close to the conditions at the reactor outlet of the proposed Canadian SCWR design (625 °C and 250 bar). The reaction kinetics information obtained from our setup, together with computer simulations, will aid us in developing chemical control strategies to minimize corrosion in SCWRs.

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Évolution des espèces produites par le ralentissement de protons rapides dans l’eau liquide : simulation fondée sur l’approximation des temps de réaction indépendants

Cited by 60 publications

References 0 publications

Monte-Carlo Simulation of γ-ray and Fast Neutron Radiolysis of Liquid Water and 0.4 <em>M</em> H<sub>2</sub>SO<sub>4</sub> Solutions at Temperatures up to 325<sup>o</sup>C

Monte-Carlo Simulation of γ-ray and Fast Neutron Radiolysis of Liquid Water and 0.4 <em>M</em> H<sub>2</sub>SO<sub>4</sub> Solutions at Temperatures up to 325<sup>o</sup>C

O₂and glutathione effects on water radiolysis:a simulation study

Supercritical Water Experimental Setup for µSR

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Évolution des espèces produites par le ralentissement de protons rapides dans l’eau liquide : simulation fondée sur l’approximation des temps de réaction indépendants

Cited by 60 publications

References 0 publications

Monte-Carlo Simulation of &gamma;-ray and Fast Neutron Radiolysis of Liquid Water and 0.4 <em>M</em> H<sub>2</sub>SO<sub>4</sub> Solutions at Temperatures up to 325<sup>o</sup>C

Monte-Carlo Simulation of &gamma;-ray and Fast Neutron Radiolysis of Liquid Water and 0.4 <em>M</em> H<sub>2</sub>SO<sub>4</sub> Solutions at Temperatures up to 325<sup>o</sup>C

O2and glutathione effects on water radiolysis:a simulation study

Supercritical Water Experimental Setup for µSR

Contact Info

Product

Resources

About

Monte-Carlo Simulation of γ-ray and Fast Neutron Radiolysis of Liquid Water and 0.4 <em>M</em> H<sub>2</sub>SO<sub>4</sub> Solutions at Temperatures up to 325<sup>o</sup>C

Monte-Carlo Simulation of γ-ray and Fast Neutron Radiolysis of Liquid Water and 0.4 <em>M</em> H<sub>2</sub>SO<sub>4</sub> Solutions at Temperatures up to 325<sup>o</sup>C

O₂and glutathione effects on water radiolysis:a simulation study