Substance Abuse

Dupont, Robert MediMedia Korea 1986 JAMA-Korea Vol.1 No.13

Leakage Flow Influence on SHF pump model performances

Dupont, Patrick,Bayeul-Laine, Annie-Claude,Dazin, Antoine,Bois, Gerard,Roussette, Olivier,Si, Qiaorui Korean Society for Fluid machinery 2015 International journal of fluid machinery and syste Vol.8 No.4

This paper deals with the influence of leakage flow existing in SHF pump model on the analysis of internal flow behaviour inside the vane diffuser of the pump model performance using both experiments and calculations. PIV measurements have been performed at different hub to shroud planes inside one diffuser channel passage for a given speed of rotation and various flow rates. For each operating condition, the PIV measurements have been trigged with different angular impeller positions. The performances and the static pressure rise of the diffuser were also measured using a three-hole probe. The numerical simulations were carried out with Star CCM+ 9.06 code (RANS frozen and unsteady calculations). Some results were already presented at the XXth IAHR Symposium for three flowrates for RANS frozen and URANS calculations. In the present paper, comparisons between URANS calculations with and without leakages and experimental results are presented and discussed for these flow rates. The performances of the diffuser obtained by numerical calculations are compared to those obtained by the three-holes probe measurements. The comparisons show the influence of fluid leakages on global performances and a real improvement concerning the efficiency of the diffuser, the pump and the velocity distributions. These results show that leakage is an important parameter that has to be taken into account in order to make improved comparisons between numerical approaches and experiments in such a specific model set up.

旅行者의 설사에 새로운 豫防法 : Subsalicylate Bismuth의 豫防的投與에 관해

DuPont, Herbert L.,Sullivan, Peggy,Evans, Dolores G.,Pickering, Larry K.,Evans, Doyle J. Jr,Vollet, John J.,Ericsson, Charles D.,Ackerman, Phillip B.,Tjoa, Weilie S. 藥業新聞社 1980 (月刊) 醫藥情報 Vol.1980 No.11

Leakage Flow Influence on SHF pump model performances

Dupont, Patrick,Bayeul-Laine, Annie-Claude,Dazin, Antoine,Bois, Gerard,Roussette, Olivier,Si, Qiaorui Korean Society for Fluid machinery 2015 International journal of fluid machinery and syste Vol.8 No.3

This paper deals with the influence of leakage flow existing in SHF pump model on the analysis of internal flow behaviour inside the vane diffuser of the pump model performance using both experiments and calculations. PIV measurements have been performed at different hub to shroud planes inside one diffuser channel passage for a given speed of rotation and various flow rates. For each operating condition, the PIV measurements have been trigged with different angular impeller positions. The performances and the static pressure rise of the diffuser were also measured using a three-hole probe. The numerical simulations were carried out with Star CCM+ 9.06 code (RANS frozen and unsteady calculations). Some results were already presented at the XXth IAHR Symposium for three flowrates for RANS frozen and URANS calculations. In the present paper, comparisons between URANS calculations with and without leakages and experimental results are presented and discussed for these flow rates. The performances of the diffuser obtained by numerical calculations are compared to those obtained by the three-holes probe measurements. The comparisons show the influence of fluid leakages on global performances and a real improvement concerning the efficiency of the diffuser, the pump and the velocity distributions. These results show that leakage is an important parameter that has to be taken into account in order to make improved comparisons between numerical approaches and experiments in such a specific model set up.

Analysis of the thermal-mechanical behavior of SFR fuel pins during fast unprotected transient overpower accidents using the GERMINAL fuel performance code

Dupont Vincent,Blanc Victor,Beck Thierry,Lainet Marc,Sciora Pierre 한국원자력학회 2024 Nuclear Engineering and Technology Vol.56 No.3

In the framework of the Generation IV research and development project, in which the French Commission of Alternative and Atomic Energies (CEA) is involved, a main objective for the design of Sodium-cooled Fast Reactor (SFR) is to meet the safety goals for severe accidents. Among the severe ones, the Unprotected Transient OverPower (UTOP) accidents can lead very quickly to a global melting of the core. UTOP accidents can be considered either as slow during a Control Rod Withdrawal (CRW) or as fast. The paper focuses on fast UTOP accidents, which occur in a few milliseconds, and three different scenarios are considered: rupture of the core support plate, uncontrolled passage of a gas bubble inside the core and core mechanical distortion such as a core flowering/compaction during an earthquake. Several levels and rates of reactivity insertions are also considered and the thermal-mechanical behavior of an ASTRID fuel pin from the ASTRID CFV core is simulated with the GERMINAL code. Two types of fuel pins are simulated, inner and outer core pins, and three different burn-up are considered. Moreover, the feedback from the CABRI programs on these type of transients is used in order to evaluate the failure mechanism in terms of kinetics of energy injection and fuel melting. The CABRI experiments complete the analysis made with GERMINAL calculations and have shown that three dominant mechanisms can be considered as responsible for pin failure or onset of pin degradation during ULOF/UTOP accident: molten cavity pressure loading, fuel-cladding mechanical interaction (FCMI) and fuel break-up. The study is one of the first step in fast UTOP accidents modelling with GERMINAL and it has shown that the code can already succeed in modelling these type of scenarios up to the sodium boiling point. The modeling of the radial propagation of the melting front, validated by comparison with CABRI tests, is already very efficient.

Efficacy and Tolerance of a New Anti-Regurgitation Formula

Christophe Dupont,Yvan Vandenplas,SONAR Study Group 대한소아소화기영양학회 2016 Pediatric gastroenterology, hepatology & nutrition Vol.19 No.2

Purpose: Regurgitation is a common physiological phenomenon in infants. The aim of the present study was to eval-uate the efficacy of a new anti-regurgitation (AR) formula (Novalac), thickened with an innovative complex including fibres, on the daily number of regurgitations and to assess its impact on stool consistency and frequency.Methods: Infants younger than five months, presenting at least 5 regurgitations per day were recruited in this trial. The efficacy of the new formula on regurgitation (daily number and Vandenplas score), stool frequency and con-sistency were assessed at day 14 and 90. Growth data were recorded at each study visit.Results: Ninety babies (mean age 9.6±5.8 weeks) were included in the full analysis data set. The mean number of regurgitation episodes at inclusion was 7.3±3.4. In all infants, regurgitations improved after 2 weeks. The daily number of regurgitations decreased significantly (−6.3±3.3, p<0.001) including in those previously fed a thickened formula (−6.2±3.0, p<0.001). There was no significant change in stool consistency at day 14. After 3 months, 97.5% of infants had formed or soft stools. Growth was appropriate with a slight increase of weight-for-age z-score (from −0.5±1.0 to −0.1±0.9) and no change of weight-for length z-score (−0.1±1.1 to −0.1±−1.1).Conclusion: The new AR formula thickened with an innovative complex is very effective in reducing the daily number of regurgitations without having a negative impact on stools consistency.

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Julia DUPONT 한국색채학회 2021 International Invitation Exhibition of Color Works Vol.- No.-

Leakage Flow Influence on SHF pump model performances

Patrick Dupont,Annie-Claude Bayeul-Lainé,Antoine Dazin,Gérard Bois,Olivier Roussette,Qiaorui Si 한국유체기계학회 2015 International journal of fluid machinery and syste Vol.8 No.3

This paper deals with the influence of leakage flow existing in SHF pump model on the analysis of internal flow behaviour inside the vane diffuser of the pump model performance using both experiments and calculations. PIV measurements have been performed at different hub to shroud planes inside one diffuser channel passage for a given speed of rotation and various flow rates. For each operating condition, the PIV measurements have been trigged with different angular impeller positions. The performances and the static pressure rise of the diffuser were also measured using a three-hole probe. The numerical simulations were carried out with Star CCM+ 9.06 code (RANS frozen and unsteady calculations). Some results were already presented at the XXth IAHR Symposium for three flowrates for RANS frozen and URANS calculations. In the present paper, comparisons between URANS calculations with and without leakages and experimental results are presented and discussed for these flow rates. The performances of the diffuser obtained by numerical calculations are compared to those obtained by the three-holes probe measurements. The comparisons show the influence of fluid leakages on global performances and a real improvement concerning the efficiency of the diffuser, the pump and the velocity distributions. These results show that leakage is an important parameter that has to be taken into account in order to make improved comparisons between numerical approaches and experiments in such a specific model set up.

Overview of the OECD NEA Data Bank Activities

E. Dupont,J. Galan,J. Gulliford,C. Nordborg,Y. Rugama 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23

The OECD Nuclear Energy Agency Data Bank operates as an international centre of reference for its member countries with respect to basic tools, such as computer codes and data, for use in different nuclear applications. The NEA Data Bank, as part of an international network of data centres, maintains large databases containing experimental (EXFOR), bibliographic (CINDA), and evaluated (EVA) nuclear data, and makes them available online via its website or via the JANIS display program. As part of its responsibilities, the Data Bank is also in charge of the compilation, verification, and distribution of the Joint Evaluated Fission and Fusion (JEFF) library. In addition, the Data Bank provides a service to its users by collecting, validating and making available upon request computer codes and associated application data libraries in many different areas relevant to the nuclear field. As part of its knowledge preservation activities, large collections of integral benchmark experiments for data and code validation are also available in areas such as criticality safety (ICSBEP), reactor physics (IRPhE), fuel performance (IFPE), and radiation shielding (SINBAD). Finally, the Data Bank coordinates the development and distribution of a database of recommended chemical thermodynamic data (TDB) for radioactive waste management applications. The Data Bank provides also support to other NEA divisions, a major part of this support is allocated to the NEA Science programme.

Report of an inferior rectal nerve variant arising from the S3 ventral ramus

Graham Dupont,Joe Iwanaga,Rod J. Oskouian,R. Shane Tubbs 대한해부학회 2019 Anatomy & Cell Biology Vol.52 No.1

In surgical approaches to the perineum in general and anal region specifically, considering the possible variations of the inferior rectal nerve is important for the surgeon. Normally, the inferior rectal nerve originates as a branch of the pudendal nerve. However, during routine dissection, a variant of the inferior rectal nerve was found where it arose directly from the third sacral nerve ventral ramus (S3). Many cases have described the inferior rectal nerve arising independently from the sacral plexus, most commonly from the fourth sacral nerve root (S4); however, few cases have reported the inferior rectal nerve arising from S3. Herein, we describe a variant of the inferior rectal nerve in which the nerve arises independently from the sacral plexus.