No abstract available

[en] Thermal process of a hot air column is discussed based on laws of thermodynamics. The kinetic motion of the air mass in the column can be used as a power generator. Alternatively, the column can also function as a exhaust/cooler

[en] A brief overview of some of the most important applications and developments of this important phenomenon is given. (authors)

[en] Highlights: •Recent and future BNCT research at Tehran Research Reactor. •Experimental and theoretical investigation on the use of TRR for BNCT. •There is a good potential to consider TRR as a pilot facility for BNCT research in the Middle East. -- Abstract: Boron Neutron Capture Therapy (BNCT) for brain tumor treatment is under development at the Tehran Research Reactor (TRR). This paper presents all current research activities that were performed during recent years as well as the prospective of BNCT research at TRR. The theoretical and experimental investigations show that TRR has a very good potential to consider it as a pilot facility for BNCT research in the Middle East and could be facilitated for clinical applications. In this way, there are some steps and also some challenges which are described in the paper.

[en] Theoretical aspects of the behaviour of the multicomponent isotopic mixtures in thermal diffusion columns ape examined. Concentration profiles in the case of krypton isotopes, in the case of a thermal diffusion column of arbitrary length, fed in the point xi=0, (xi-length coordinate), with krypton of natural abundance, was calculated. The results are graphically presented. (author)

[en] For a given product concentration, choice of the cascade structure is presented. For the cascade, having the minimum number of columns for the desired production, the operation curves and other characteristics are calculated. (author)

[en] Revitalisation thermal columns propulsion train control system is very urgent to be implemented because of the test results and observation, control system performance is not normal, there are several components that must be renewed. Components includes MCB, magnetic contactors, push buttons, indicator lights and wiring. Drive motor is used to power 1.5 kW 3 phase, 380 volts and 50 Hz, nominal current (In = 3.75 A). Thermal column is one of the irradiation facility at the Kartini reactor has a beam-shaped room of measuring 1.2 X 1.2 X 1.6 m contains graphite blocks 10.2 X 10.2 X 127 cm(1) and is tangentially connected to the Kartini reactor core. Graphite blocks mounted reflector extends from the outer side to the inner surface of the door closer. Door closer contains barite concrete as radiation shielding and can be moved forward and backward to close and to open using a rotating motor to spin the wheel transmission system for running on rails. (author)

[en] The reactor assembly of JRTR (Jordan Research and Training Reactor) has been successfully installed at the site and its operability has been completely verified through several commissioning stages. Finally, it was turned over and started to operate from early 2017 by its owner. In this paper, strategy for successful implementation of the reactor assembly is explained and actual installation works of the reactor assembly are described with lessons learnt. The installation of the research reactor assembly had been successfully completed despite of its intrinsic difficulties. It was clear that the strategy was well established in advance and perfectly applied in actual installation processes. All the components have been installed properly as planned in accordance with the approved procedures and the results have met the strict criteria. In the commissioning stages, the quality of the installation and the system performance have been proved certainly. Even though several unexpected problems, like mostly cleaning issues, they could be solved by continuous training for field engineers and workers, and comprehensive cooperation among all participants. It was realized that efforts to understand and accommodate the field situations and schedule were also important for successful installation.

[en] Nuclear characteristics of the core and operating characteristics are given of the WWR-S-Prague reactor after its reconstruction. The program for nuclear characteristics determination of the core with the IRT-M fuel included the determination of the core configuration, critical mass, regulating rod calibration, the effect of the Be reflector on reactivity, neutron flux density, etc. The program for operating characteristics determination included the determination of thermal column temperatures, coolant circuits parameters, and cooling water parameters. (B.S.)

[en] The four beam tubes and the thermal column at the TRIGA reactor Vienna were used intensively during the reporting period. Three of the beam tubes are mainly used for neutron spectroscopy such as small angle scattering, neutron interferometry and polarized neutrons where now investigations of magnetic structures in pulsed high magnetic fields (25 T) synchronized with the pulsed mode of the reactor have been started. The thermalizing column will be modified from the present cold neutron source to a comfortable neutron radiography installation which allows investigations of objects of a size up to 30 cm diameters. The thermal column is also used for neutron radiography and as a strong gamma source to investigate gamma irradiation effects on various materials such as glass fiber cables. In view of flexible utilization of the thermal column a movable shielding construction has been designed which is simple rolled away on the rails of the thermal column doors when access to the thermal column in necessary. (orig.)