[en] Expirience of constructing landscape block of geoinformation system, designated for regional geoecological forecasting on the basis of mega-line-Delta computer is presented. Works were conducted in summer of 1986 for the purpose of forecasting radionuclide migration in 30-km zone of the Chernobyl accident, as well as evaluation of radioecological situation in Kiev, Zhitomir and Chernigov regions. System design work lies in choice and construction of information model of the natural medium, reflected and processed in data bank by methods of information science. Three groups were distinguished in examined region according to intensity of substance migration: 1) zones of preferred evacuation with surface run-off, 2) transit zones, 3) zones of evacuation and accumulation of flood plain substance

[en] The report offers a condensed survey of the situation in the Federal Republic of Germany with regard to contamination of air, water, soil and food through radioactive substances and resulting radiation exposure of the population caused by the Tschernobyl reactor accident. Radiation doses in food were on a low level. Radioactivity still present in man sank in the course of 1989 to about 15% of the maximum level of 1987. The intermediate effective dose commitment of the Federal Republic of Germany's population caused by the reactor accident was with under 0.04 mSv (4 mrem) for 1989 much lower than natural radiation exposure. (orig./HP)

[en] Consideration is given to principles of organization of the PROBA information system (IS) and to the method of expert evaluation applied for analyzing large data files on radioactive site contamination after the Chernobyl accident. Realization of the method in IS apparatus enabled to analyze effectively fuel release from accidental unit according to the quantity and character of its fallout outside the station. Method of correlations suggested by the Institute of Atomic Energy and realized in IS enabled to obtain the information about the character and sizes of surface contamination of large areas (UkrSSR, BSSR) by radionulides and present it in the form of maps of plutonium, strontium and cesium isotope comtamination levels

[en] Following the adoption, in September 1986, of the Convention on Early Notification of a Nuclear Accident, the IAEA and the WMO began work on the development of a methodology for the rapid dissemination of information and data following a nuclear accident. Expert Group meetings defined the data and information which needs to be disseminated, under the requirements of the Conventions. The Global Telecommunication System (GTS) of the WMO was identified as the suitable technical means of transmission since it combines immediate availability during times of emergency, rapidity of transmission and permanent connections to all Member States through their National Meteorological Centres. In order to utilize the GTS, special procedures and transmission formats have to be observed ad a specific code was jointly developed by WMO and IAEA to make the message Language-independent. Relevant instructions were issued in the WMO/IAEA Manual on the use of the WMO-GTS for the Early Notification Conventions. National arrangements for access by competent authorities to the information provided under the Early Notification Convention and for the provision of basic radiological data are of critical importance. Preparations are being made to provide specialized analyses and predictions on the atmospheric transport of radionuclides using the GTS and other means. The format and number of special output products is being specified in accordance with the requirements of the Member States. Requirements for meteorological and radiological data need to be kept under review in the light of model developments. The IAEA is presently engaged in the production of a software package for the coding/decoding of the data transmission

[en] Upon becoming aware that an accident such as in Chernobyl had occurred, governments were confronted with the necessity of managing an emergency whose dimensions were yet unknown, and of meeting public demands for information about it. In seven European countries it was investigated how the media communicated information dealing with nuclear technology and with the effects of radiation on public health. Common problems were identified and ways were suggested in which communications and crisis management might be improved. (DG)

[en] The paper presents an outline of contingency plans drawn up for safeguarding the water supply and disposal in Kiev following the Chernobyl accident, including provision of alternative water sources, flexible treatment plans under varying radiological conditions, and adequate radiation monitoring. (author)

[en] The results of a full scale plant experiment at the Oelegem Production Centre of the water supply company of Antwerp (Belgium) indicate that removal efficiencies for radionuclides in conventional water treatment plants, operated under normal working conditions, are rather low. After the fallout of radionuclides caused by the accident at Chernobyl on April 26th 1986, removal efficiencies were recorded ranging from 34% up to 84%, with an average of 50±20% for different water treatment plants in Belgium and the Netherlands. The resulting values are compared and the determining factors discussed. Removal efficiencies appeared to be similar to those obtained before the Chernobyl event. (author)

[en] A recent report on the Chernobyl accident by AEA Technology in the United Kingdom is briefly reviewed. The AEA says 10 000 fatal cancer deaths could arise in the USSR from the accident - a figure that represents 0.03% of the 40 - 70 million natural rate from other causes. The world figure is about 40 000 cases or 0.01% of all cancer deaths. (author)

[en] Published in summary form only

[en] Environmental radioactivity in the territories contaminated as a results of Chernobyl accident is considered. To develop regulations for people residence in these regions the National Committee on Radiation protection under USSR Ministry of Health (NCRS) has suggested a concept of permissible whole life dose of 35 rem. This concept is fully approved by IAEA, WHO, SCEAR UNO. It is pointed out that in many regions, having undergone, where temporal restrictions and prohibitions for local foodstuffs were introduced, there is a deficit of supply feodstufts, their quality is low and they are too expensive. Accordingly, the quality of naurishment deteriorates as compared with the level before the accident. Children are especially sensitive to this factor