[en] The influence of the presence of traces of Pb²⁺ in acidic chloride media promoting s.c.c. on Type 304 stainless steel has been evaluated. Pb²⁺ even in traces can inhibit the occurrence of s.c.c. and the inhibiting effect is mainly due to the inhibition of the cathodic process of hydrogen evolution. Underpotential deposition of Pb²⁺ is invoked as an explanation of the inhibition of the reaction step involving the adsorption of hydrogen at the alloy surface. Some influence of Pb²⁺ to decrease the role of sulphide inclusions in the initiation stage of localized corrosion is also postulated. (author)

[en] The JET ICRF A/sub 1/ Antenna Vacuum Transmission Lines will be pumped with individual non-evaporable getter pumps. The pump is a cartridge type in an all welded body which is heated externally to give activating, operating and regenerating temperatures. The pumped Hydrogen is periodically regenerated back into the torus. This will be particularly advantageous during the tritium phase of operation. The pump is simple and gives a high reliability. It is tolerant of conditions close to the torus and can be sited within the volume reserved for installation of the RF transmission lines. The all welded system simplifies remote handling. Tests on prototype pumps are being conducted to establish operational data and confirm contamination, saturation and embrittlement levels. A getter pump has been installed on one of the existing antenna systems on JET, no difficulties have been experienced in operating this antenna

No abstract available

No abstract available

[en] The JET ICRF A₁ Antenna Vacuum Transmission Lines will be pumped with individual non-evaporable getter pumps. The pump is a cartridge type in an all welded body which is heated externally to give activating, operating and regenerating temperatures. The pumped Hydrogen is periodically regenerated back into the torus. This will be particularly advantageous during the tritium phase of operation. The pump is simple and gives a high reliability. It is tolerant of conditions close to the torus and can be sited within the volume reserved for installation of the RF transmission lines. The all welded system simplifies remote handling. Tests on prototype pumps are being conducted to establish operational data and confirm contamination, saturation and embrittlement levels. A getter pump has been installed on one of the existing antenna systems on JET, no difficulties have been experienced in operating this antenna. (author)

[en] This paper reports on St 198 alloy which is attractive for glovebox clean-up systems operating with nitrogen cover gases, offering good tolerance to impurities which may permeate into the box from the environment and stable sorption speeds for alloy loadings as high as 360 mCi/g. At this loading the tritium concentration in the stream leaving the scavenger bed will be of the order of 400 μCi/m³. The alloy operating conditions can be adjusted to increase the quantity of tritium stored in the alloy or to reduce the tritium concentration in the effluent. Methane can not be removed from a nitrogen stream with St 198. A glovebox clean-up system based on the use of this alloy is under evaluation

[en] Since the entry into force of the Additional Protocol, nuclear safeguards is faced with an abundance of information from different sources which require effective tools for the collection, storage, analysis and retrieval of data. Over the last years, the Joint Research Centre (JRC) has developed a number of tools supporting the preparation, management and verification of AP declarations, which were demonstrating the usefulness of Geographic Information Systems (GIS) for this purpose. Following these experiences, DG-TREN has asked the JRC to develop a Geo-Portal integrating the diverse databases at DG-TREN and providing a single point of access to all safeguards-relevant information. Based on the same platform, NUMAS was developed with the objective of integrating information from various sources in view making available information on Nuclear Fuel Cycle. The article describes the objectives and the features of both systems. (author)

[en] The Directorate General for Energy and Transport of the European Commission (DG-TREN) is responsible for the implementation of the EURATOM Safeguards system and the Safeguards Agreements and Additional Protocols under the Non Proliferation Treaty. In particular since the entry into force of the Additional Protocol, DG-TREN is faced with an abundance of information from different sources which require effective tools for the collection, storage, analysis and retrieval of data. Over the last years, the Joint Research Centre (JRC) developed a number of tools supporting the preparation, management and verification of AP declarations showing the usefulness of (Geographic Information System (GIS) for this purpose. Following these experiences, DG-TREN asked the JRC to develop a Geo-Portal integrating the diverse databases at DG-TREN and providing a single point of access to all relevant information. The proposed system is sketched and has the following features: - It is a multi-tier system (database, application server, client application) which is compatible with the existing IT architecture at DG-TREN. Particular attention is paid on respecting the strict security requirements associated with the information. - It implements a geo-database containing all locations and geographic features of interest (sites, buildings, mines, R and D activities, etc). Every geographic feature has a link to each existing item of information that is associated with this feature, e.g. a site contains links to all relevant AP declarations, inspector reports, supporting documentation, etc) - An application server transfers the data to the client application using standard web protocols thus providing maximum flexibility for possible extensions and also facilitating deployment and maintenance. The system will be installed within the secure DG-TREN network which protects the information from unauthorised external access. - The GIS client application provides a single point of access to all data integrated into the system. It visualises all locations and features within their geographic context, allows searching the geo-database according to geographic or non-geographic attributes and directly displays basic information on the features. For detailed information it provides hyperlinks into all relevant databases, e.g. a separate application provides the interface to the AP declaration database. The system provides different role-based functionalities to the user, i.e. depending on his authorisation the user might have write access, read access to all data or read access to only part of the data. Initially the Geo-Portal will be integrated with the AP database and thus support DG-TREN in managing the Additional Protocol declarations. Further databases will then be added successively and the system will be extended to serve other purposes and user groups. The same technical platform as can also function as a basis for other related tools that can be used in the commission or by other clients. An example is the NUMAS database, which is developed aiming at integrating geographical and textual open source information in the context of non proliferation (basics in nuclear fuel cycle, country profiles and related investigations). The developed demonstrator allows collecting information about nuclear facilities and presenting it in graphical form. Descriptors (facility type, outputs, owner, status, etc.) are recorded after validation. Documents such as satellite images, synthesis, maps etc. can be attached at facility or country levels. Therefore the information is structured in the following way: (country) -> (facilities) -> (descriptors; documents; images). Queries can be made from the information available in the database. The interface allows making simple or advanced queries in an external document repository managed by Verity, a commercial document management system. An interface for queries done with the help of topic trees was also developed. Further developments are considered for graphical interfaces, access privileges, organisation and traceabi lity of comments at the report elaboration stage