[en] Estimates of solid and liquid radioactive wastes produced in CDTN, the foreseen treatment and the responsibilities of various organs of CDTN involved in radioactive waste management are presented. (C.M.)

[en] This work presents a brief description of the main characteristics of the Brazilian Synchrotron Project and indicate its present state of development. (A.C.A.S.)

[en] The plasma centrifuge is a device in which a fully ionized plasma column rotates at high angular velocities by means of crossed electric and magnetic fields. Ion angular rotation frequencies of 6.9 x 10⁴ - 1.2 x 10⁵ rad/s have been measured for a carbon plasma, with an externally applied magnetic field of 0.09T. Isotopic enrichments of up to 390% for ¹³C have measured at 6cm radius. The steady state behavior of the fully ionized magnetized plasma in the vacuum-arc centrifuge has been theoretically investigated using a multiple species fluid model, which includes electromagnetic, pressure-gradient, centrifugal and collisional forces in cylindrical geometry. (author)

[en] Recent results obtained in different experiments at the Institute for Space Research (INPE) are reported. An enrichment of 390% of carbon isotopes has been achieved in the plasma centrifege. The role of ion-acoustic turbulence in the formation of double layers has been experimentaly investigated. The turbulent spectrum has been measured and agrees quite well with the prediction of the modified Kadomtsev's renormalized theory. The characteristics of the gyrotron that is presently being built at INPE and new techniques for gyrotron design are discussed. Thecretical results on the generalized Spitzer-Harm problem, current drive in the start-up phase of Tokamaks, and quasilinear theory of beat-wave current drive are also presented. (author)

[en] Several works, covering the 1981 and 1982 years, from the Physical Institut of the Federal University of Rio Grande do Sul - Brazil are reported. They treat both experimental and theoretical aspects of almost the totality of the physical areas, including also the instrumentation part. (L.C.)

[en] This memoirs reports the scientific activities of the Centro Brasileiro de Pesquisas Fisicas (CBPF), a Brazilian Center for Physics Research, during the year 1991 the year 1991

[en] Methods, means and procedures adopted by Petrobras engineering service to survey safety radiation protection of the companies that carry out radiographic services of PETROBRAS are showed. The systematic used in certification of personel, procedures, audits and field survey concerning radiation protection, are described. (C.M.)

No abstract available

[en] This environmental monitoring program of CDTN aim to do a survey that permit to verify if the radioactive wastes release by CDTN agree with basic rudiments of radioprotection, evaluate the environmental impact, verify the adjustment of using proceedings to effluents control, to evaluate the maximum radiation doses that public persons will be able to get yearly. (C.M.)

[en] The conceptual design of a 35GHz gyrotron operating in the TE₀₂₁ mode, intended for plasma heating experiments, is presented. The electrooptical system is synthesized from the electron beam parameters in the cavity region and the electrodynamical system includes a conventional resonator consisting of truncated cones. The starting and operating characteristics are calculated by integrating the exact equation of electron motion under the action of an RF fiel with fixed spatial distribution. For the moment, the experimental activities, in addition to providing all the infrastructure for the laboratory, are concentrated on the construction of a system of magnetic coils, able to generated a 15kG magnetic induction with a fluctuation of 0.1% over an extension of 13cm, on the manufacture of cavities by using electroforming techniques and on the development of techniques for the construction of electron guns. (author)