[en] In the paper the expressions for transfer functions of the zero power reactors, as well as power reactors of the RA reactor type are given, based on the space independent model. The modulation method for reactor transfer function measurements is explained. The results of the measurement and interpretation are given. The measurement were done on the RB and RA reactors in 'Boris Kidrich' Institute for Nuclear Sciences in Vincha (author)

[en] Ever since its foundation in 1948, the VINCA Institute of Nuclear Sciences was a nuclear-oriented scientific institution. Achieving valuable results in different fields of nuclear sciences and technologies, the Vinca Institute became, and still is, the largest scientific institution in the former and the todays Yugoslavia. Structure and intensity of nuclear activities varied with the time, following the pattern of domestic and international interest for this kind of knowledge. The nuclear part of the VINCA Institute had its raises and falls, it is a long history, but unquestionably there is a future, too. This paper presents a survey of the past and the present nuclear activities in Yugoslavia, with special attention payed to the future of nuclear sciences and technologies in the VINCA Institute

[en] The main aim of the present paper is to provide the basic elements needed for formulating the Yugoslav nuclear program in the recently established circumstances. First, a summary of the purposes, contents and results of the former Yugoslav nuclear programs is given. Our present activities in the field of nuclear sciences and technologies are presented. New circumstances relevant for the use of nuclear energy, both in the world and in our country, are analyzed. The conclusions concerning the future nuclear program are down. 5 refs., 3 figs., 2 tabs

[en] Although the nuclear power was introduced recently in Yugoslavia with NPP KRSKO (connected to the grid in 1982.), nearly thirty years of wide experiences in nuclear safety is acquired at Boris Kidric Institute during operation of research reactors RA and RB. Reactor RB is an unshielded, zero power reactor, constructed in 1958, in as an actually bare critical natural uranium - heavy water system [1]. It was the first nuclear reactor designed in Yugoslavia and based on the national plan of development of nuclear energy [1,2,3,14]. Reactor RA is a 6.5 Mw heavy water research reactor designed in 1956, in USSR. Construction of the Yugoslav RA reactor started in 1957, and the reactor began operation in 1959, as one of the research reactors with better characteristics in the world at that time [4,5,6,14]. The main improvements in general and particularly nuclear safety both of the reactors in the past 30 years are given in this paper. These progressions are results of long experience acquired in reactor operation, maintenance, testing, development and application of newer safety criteria. The newer safety criteria have demanded improvements in the technical characteristics and in the administrative regulation domains both of the reactors

[en] Although the nuclear power was introduced recently in Yugoslavia with NPP KRSKO (connected to the grid in 1982.), nearly thirty years of wide experiences in nuclear safety is acquired at Boris Kidric Institute during operation of research reactors RA and RB. Reactor RB is an unshielded, zero power reactor, constructed in 1958, in as an actually bare critical natural uranium - heavy water system [1]. It was the first nuclear reactor designed in Yugoslavia and based on the national plan of development of nuclear energy [1,2,3,14]. Reactor RA is a 6.5 Mw heavy water research reactor designed in 1956, in USSR. Construction of the Yugoslav RA reactor started in 1957, and the reactor began operation in 1959, as one of the research reactors with better characteristics in the world at that time [4,5,6,14]. The main improvements in general and particularly nuclear safety both of the reactors in the past 30 years are given in this paper. These progressions are results of long experience acquired in reactor operation, maintenance, testing, development and application of newer safety critera. The newer safety criteria have demanded improvements in the technical characteristics and in the administrative regulation domains both of the reactors

[en] A short informational review of the activities in the 'Boris Kidric' Institute on the training courses for the use of radioactive materials and for operating nuclear reactors including power reactors. The survey of the courses is given in the enclosures. (author)

[en] Project 'Reactor oscillator' covers the following activities: designing reactor oscillators for reactors RA and RB with detailed engineering drawings; constructing and mounting of the oscillator; designing and constructing the appropriate electronic equipment for the oscillator; measurements at the RA and RB reactors needed for completing the oscillator construction

[en] Some of the equipment in the two research reactors at the Vinca Institute in Belgrade, Serbia is fit for a museum. But the problem of ageing components is only one of the difficulties faced by the operators - they also have to cope with the political and financial conditions prevailing in their country. (author)

[en] Ever since its foundation in 1948, Vinca Institute was a nuclear-oriented scientific institution. Achieving valuable results in different fields of nuclear sciences and technologies, Vinca became and still is the largest scientific institution in the former and today's Yugoslavia. Structure and intensity of nuclear activities varied with the time, following the pattern of domestic and international interest for this kind of knowledge. The nuclear part of Vinca had its raises and falls, it is a long history, but unquestionably there is a future. This paper presents a survey of the past and the present nuclear activities in Yugoslavia, with special attention paid to the future of nuclear sciences and technologies in the Institute. (author)

[en] Mechanical part of the reactor oscillator changes the rotational motion of the motor into translation oscillating motion of the sample in the reactor. System was constructed according to the design and can oscillate the samples that could appear in the experiments. The completed system is described in this report and a photo of the completed device is included