[en] The 25/2009 Decision of the Hungarian Parliament has granted prior consent to begin preparatory works to build new reactor blocks at the Paks Nuclear Power Plant site. Based on that Decision, the Hungarian National Atomic Energy Authority, as the supervising organization of nuclear activities, has started to develop nuclear safety standards for the new blocks. The draft regulation is complete; professional consultation is currently underway. This article presents the additional requirements of the current legislation and the new blocks. (TRA)

[en] The act of the safety regulations and standards, how to understand exactly the meaning and how to apply the regulations and standards in appropriate fields are discussed. Some problems to be paid attention are put forward in quoting the related regulations and standards, that is, the quoted regulations and standards must be the latest edition, and must be of the pertinence and comprehensiveness. (authors)

[en] Safety studies for nuclear power plants in Belgium are performed on behalf of the owner by architect-engineers and submitted to the authorities for technical assessment. US safety rules are applied in Belgium, but there is also experience of French, German and IAEA safety rules through participation in foreign projects

[en] The nuclear safety approach imposes to take into account in the design of a reactor, a list of events and configurations that are considered as precursors of transients important for the safety of the reactor. These incidental or accidental transients should be thoroughly studied during the design phase in order to be sure that safety criteria are well respected with a sufficient margin. These studies are framed by procedures that are based on sets of input data, on simulation models and on computer codes and their validation domain. The operating life of a study procedure is usually over 10 years. A lot of procedures that date back in the seventies rely on simplified models and appear to be too conservative to today's standard. The generalization of 3-dimensional calculations for reactor core codes and the coupling between neutron transport codes and thermalhydraulic codes make necessary a progressive updating of the study procedures. (A.C.)

[en] The main working spheres and results gained during 40 years of activity of the Great Britain Nuclear Installation Inspectorate (NII) are considered. The new approach to safety analysis developed with NII participation is described in details. The important role of the safety analysis realization, utilization of modern methods for risk estimation and safety culture principles introduction at NPPs is shown

[en] The author shows how the methods applied to nuclear safety can be extended to industry in general and particularly to the chemical industry. To this end, precise examples are given: cryogenic storage of liquefied gas, manufacture of fluo-products

[en] The complementary safety assessments (CSA) that have been made for each nuclear station have shown, according to the ASN (French Nuclear Safety Authority), first that all nuclear power plants have a sufficient safety standard and secondly that some solutions exist to increase the safety margin. The ASN proposes: -) the setting of new measures, adapted to each nuclear plant for assuring the basic safety requirements in case of extreme situations as described in CSA; -) the setting of a force made of qualified teams and equipment to intervene on a nuclear accident very quickly; -) the reinforcing of dispositions for avoiding the dewatering of fuels in spent fuel pools; -) the carrying out of feasibility studies for reinforcing the protection of underground and surface waters in case of a major accident. (A.C.)

[en] A report of a seminar on The Review of Safety at Magnox Nuclear Installations is presented. Main theme was the long term safety review (LTSR) which comes into operation once the plant life is extended to beyond 20 years. Calder Hall and Chapelcross, pressure vessels, post-trip cooling, probabilistic safety analysis, steel pressure circuits, modern standards and the biological shield integrity are discussed. (U.K.)

[en] The safety of a nuclear power plant is guaranteed for by its design, the maintenance and management operations, by refurbishing and periodical overhauling. The conditions for the operation permission are discussed, as are the safety report and the probabilistic safety analysis. It can be shown that the nuclear power plant meets today's safety requirements and therefore can be operated safely

[en] This article contains four lists of various documents relevant to nuclear safety as compiled by the editor. These lists are: (1) reactor operations-related reports of U.S. origin, (2) other books and reports, (3) regulatory guides, and (4) nuclear standards. Each list contains the documents in its category which were published (or became available) during the October 1995 through March 1996 reporting period. The availability and cost of the documents are noted in most instances