Validation of the Fast Neutron Field in the Radial Channel of the VR-1 Reactor

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Evžen Losa ◽  
Michal Košťál ◽  
Milan Štefánik ◽  
Jan Šimon ◽  
Tomáš Czakoj ◽  
...  
Keyword(s):  
Fast Neutron ◽  
Neutron Spectrum ◽  
Fission Neutron ◽  
Neutron Field ◽  
Neutron Spectrometry ◽  
The Core ◽  
Radial Channel ◽  
Higher Power ◽  
Channel Beam ◽  
The University

Abstract This work aims to characterize the neutron spectrum in the beam going out of the university research reactor (VR-1) using tubular-type of the nuclear fuel, version 4M (IRT-4M) fuel. Thanks to its variability, the core is often rearranged to fulfill different research tasks. Measurements with new core configuration have been carried out to confirm the spectrum shape in the neutron beam of the radial channel remains unchanged even though the core has been rearranged. Based on this finding, the VR-1 can be considered as a mockup for other IRT-4M fueled reactors, even with higher power. The neutron spectrum stability has been proven by measurement and by comparison of measurements done on the C12 and C13 cores. Fast neutron spectrum in the channel has been evaluated by means of neutron spectrometry by scintillation detector and activation materials (Au, Co, Ni, Al, Fe, and NaI). If the neutron field stability is proven, the radial channel beam can be used for evaluation of spectrum weighted cross section disregarding changes in the core configuration. Assuming reactions with higher threshold, their rates can be compared with rates obtained in the pure prompt fission neutron spectrum (PFNS), since earlier measurements have shown that the neutron spectrum in the light water reactor cavity is equal to the PFNS above 6 MeV threshold. Result 1.1831 mb for 127I(n,2n) reaction evaluated from the VR-1 activation measurement demonstrates good agreement of the measured reaction rate with tabulated rate averaged in 235U PFNS, confirming the neutron spectrum stability and equality to the PFNS.

scholarly journals Neutron spectrum determination of p+Be reaction for 30 MeV protons using the multi-foil activation technique

2020 ◽  
Vol 239 ◽  
pp. 17015
Author(s):  
Milan Stefanik ◽  
Eva Simeckova ◽  
Pavel Bem ◽  
Mitja Majerle ◽  
Jan Novak ◽  
...  
Keyword(s):  
Fast Neutron ◽  
Neutron Spectrum ◽  
Nuclear Data ◽  
Reaction Rates ◽  
Neutron Field ◽  
Activation Technique ◽  
Fast Neutron Activation Analysis ◽  
Beryllium Target ◽  
Foil Activation

At the NPI in Rez, the p + Be source reaction was investigated for 30 MeV proton beam and thick beryllium target. For neutron field determination of the p(30)+Be source reaction in close source-to-sample distance, the multi-foil activation technique with a set of 10 activation materials (Au, Co, Lu, Ti, In, Al, Y, Fe, Ni, Nb) was utilized. From resulting reaction rates, the neutron spectrum was reconstructed using the SAND-II unfolding code. New neutron field of white spectrum up to 28 MeV has an intensity of 8.6 × 1010 cm−2s−1 close to target. The obtained neutron field extends the utilization of cyclotron-based fast neutron sources at the NPI and provides new experimental opportunities for future irradiation experiments such as fast neutron activation analysis, nuclear data validation, and radiation damage study of electronics and materials for nuclear energetics.

Prompt Fission Neutron Spectrum ofPu241

1961 ◽  
Vol 123 (6) ◽  
pp. 2140-2142 ◽  
Author(s):  
A. B. Smith ◽  
R. K. Sjoblom ◽  
J. H. Roberts
Keyword(s):  
Neutron Spectrum ◽  
Fission Neutron ◽  
Fission Neutron Spectrum ◽  
Prompt Fission Neutron Spectrum ◽  
Prompt Fission ◽  
Prompt Fission Neutron

scholarly journals Enhancing Postgraduate Learning and Teaching: Postgraduate Summer School in Dairy Science

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Pietro Celi ◽  
Gianfranco Gabai ◽  
Massimo Morgante ◽  
Luigi Gallo
Keyword(s):  
Summer School ◽  
Research Collaboration ◽  
Learning Experience ◽  
Scientific Investigation ◽  
Core Component ◽  
Learning And Teaching ◽  
Transferable Skills ◽  
The Core ◽  
Dairy Science ◽  
The University

Dairy science is a multidisciplinary area of scientific investigation and Ph.D. students aiming to do research in the field of animal and/or veterinary sciences must be aware of this. Ph.D. students often have vast spectra of research interests, and it is quite challenging to satisfy the expectation of all of them. The aim of this study was to establish an international Ph.D. training program based on research collaboration between the University of Sydney and the University of Padova. The core component of this program was a two-week Postgraduate Summer School in Dairy Science, which was held at the University of Padova, for Ph.D. students of both universities. Therefore, we designed a program that encompassed seminars, workshops, laboratory practical sessions, and farm visits. Participants were surveyed using a written questionnaire. Overall, participants have uniformly praised the Summer School calling it a rewarding and valuable learning experience. The Ph.D. Summer School in Dairy Science provided its participants a positive learning experience, provided them the opportunity to establish an international network, and facilitated the development of transferable skills.

scholarly journals Introduction: Physics, Technology, and Technics during the Interwar Period

2018 ◽  
Vol 31 (3) ◽  
pp. 251-261
Author(s):  
Shaul Katzir
Keyword(s):  
World War Ii ◽  
Cold War ◽  
Interwar Period ◽  
Scientific Inquiry ◽  
Government Funding ◽  
World War ◽  
The Core ◽  
Historical Processes ◽  
The University ◽  
University Industry

Historians, philosophers, and physicists portray the 1920s and 1930s as a period of major theoretical breakthrough in physics, quantum mechanics, which led to the expansion of physics into the core of the atom and the growth and strengthening of the discipline. These important developments in scientific inquiry into the micro-world and light have turned historical attention away from other significant historical processes and from other equally important causes for the expansion of physics. World War II, on the other hand, is often seen as the watershed moment when physics achieved new levels of social and technical engagement at a truly industrial scale. Historians have shown that military interests and government funding have shaped physics to unprecedented degree, and according to some, to the extent of discontinuity with earlier practices of research (Forman 1987; Kevles 1990; Kaiser 2002). In this vein, Stuart Leslie wrote, “Nothing in the prewar experience fully prepared academic scientists and their institutions for the scale and scope of a wartime mobilization that would transform the university, industry, and the federal government and their mutual interrelationships” (Leslie 1993, 6). While one can never befullyready for novelties, the contributors to this issue show that developments in interwar physics did prepare participants for their cold war interactions with industry and government.

scholarly journals Levels of well-being and involvement of young children in centre-based provision in

2011 ◽  
Vol 1 (2) ◽  
Author(s):  
Bart Declercq
Keyword(s):  
South Africa ◽  
Experiential Education ◽  
Well Being ◽  
Department Of Education ◽  
Free State ◽  
Childhood Education ◽  
The Core ◽  
Children’S Wellbeing ◽  
Observation Tools ◽  
The University

This article reports on a study that examined the levels of young children’s wellbeing and involvement in centre-based provision (birth to five years) at child, group and setting level1 in Free State, South Africa. The study was funded by the FlemishDepartment of Education and was executed in collaboration with the Free State Department of Education and the University of Free State. Nineteen settings were included in the study. The average setting was registered for 121 children (with ratio’svarying from 30 to 326 children registered). Foundation Phase students from the 2nd and 3rd year of study at the University of Free State collected data through observation tools designed by the Centre for Experiential Education at Leuven University, Belgium. The core instrument uses the Leuven scales for well-being and involvement. Results of the study indicate that overall scores for well-being and involvement are low, but also that there are huge differences between different groups and settings. Thus, indicating that early childhood education in centre-based provision makes a difference.

scholarly journals Neutron spectrometry and dosimetry in 100 and 300 MeV quasi-mono-energetic neutron field at RCNP, Osaka University, Japan

2017 ◽  
Vol 153 ◽  
pp. 08020 ◽  
Author(s):  
Vladimir Mares ◽  
Sebastian Trinkl ◽  
Yosuke Iwamoto ◽  
Akihiko Masuda ◽  
Tetsuro Matsumoto ◽  
...  
Keyword(s):  
Neutron Field ◽  
Neutron Spectrometry ◽  
Energetic Neutron
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