FAST Nuclear Emergency Tools

DSA var deltaker i WP1, WP2, WP3, WP4 og WP5. Fokus har vært på å lage database for radioaktivt kildeterm for flere type europeiske kommersielle atomkraftreaktorer. Kildeterm har blitt opprettet for mange forskjellige ulykkesscenarier for hver reaktortype. Annet fokus har vært på bruk av kildetermdatabase i responssystemer for å forbedre håndtering av atomulykker. Trening til medlemslandene i prosjektet har blitt gitt for å harmonisere analyse av atomulykkesscenarier og respons som følger. For testing og øvelser har man brukt to kommersielle beredskapsverktøy for estimering av kildeterm - RASTEP og 3D/3P PERSAN. For spredningsprognoser har man brukt ARGOS 7.0. For detaljer, se oppdatert fremstilling på engelsk nedenfor.

As a result of FASTNET project a response methodology has been developed that integrates tools and methods to ensure both diagnosis (what is the actual situation in the installation) and prognosis (what may happen in a foreseeable future) of severe accident progression. The method of estimation of the consequences on the surrounding population and the environment in particular Nuclear Power Plant types in Europe. The database for source terms has been generated and are delivered to the FASTNET member organizations.

When dealing with emergency, two issues with fully different time requirements and operational objectives, and thus different methods and tools, have to be considered: emergency preparedness and emergency response. This project will address both issues by combining the efforts of organizations active in these two areas to make already identified deterministic reference tools and methods a decisive step toward. In particular capabilities of these methods and tools will be extended to tackle main categories of accident scenarios in main types of operating or foreseen water-cooled NPPs in Europe, including Spent Fuel Pools. A first task will be the identification of these categories of scenario, the proposition of a methodology for their description and the development of a database of scenarios. Building this database will constitute a first important step in the harmonisation goal defended in this project. Promising probabilistic approaches based on Bayesian Belief Networks (BBN) are currently developed to complement operational deterministic methodologies and tools by contributing to diagnosis accidental situations. The development of the methodologies will be pursued in this project with the extension of the existing deterministic ones to European reactors. Both approaches will be assessed against the above mentioned database of scenarios. Finally a comprehensive set of emergency exercises will be developed and proposed to be run by a large set of partners. A first series of exercises will address source term evaluations that will be compared to the reference source terms from the scenarios database. Then a second series of exercises will be proposed on the same scenarios that will be used for the first series but accounting for the main emergency objective : to protect the populations. Progresses made by the methods and tools developed within this project will be notably assessed by comparing the results obtained in these two series of exercises.