FAST Nuclear Emergency Tools

DSA participated in the FASTNET Training Session hosted by IRSN during May of 2018. This session was focussed on the application of the two FASTNET tools, RASTEP and 3D/3P PERSAN, for the estimation of source terms in the event of a nuclear accident. Training was provided by the developers of the tools with active participation by attendees in the use of the tools. Over 20 participant organisations were involved in the training session. WP#4 Exercises DSA organised and managed two international exercises within WP#4 of the FASTNET Project. The first exercise of WP4 was held during December of 2018. The primary aim of the first exercise was the use of the FASTNET Tools for estimation of source terms for a series of 4 Nuclear accident scenarios. Materials describing technical details of the scenarios and their temporal developments were digitally disseminated and 22 participants from 19 countries provided results. The results highlighted the participants capacities in relation to source term estimation and the strengths and areas of improvement of the FASTNET Tools. A second exercise was held at the BOKU facilities in Vienna during February 2019. The aim of this exercise was the integration of the source term estimates generated by the FASTNET Tools within the systems and structures designed to protect populations in the event of a nuclear accident. The exercise was played in real time over the course of one day and 15 organisations from 14 countries participated. WP#5 Dissemination NRPA participated in the following training and workshops. - 2nd FASTNET Workshop 16-17 October, 2017 in Paris. The workshop focused on the development of a scenario database and methodologies applied to emergency preparedness and response. The results of so far work on the scenarios database and emergency preparedness were discussed. - 3-day training session on the emergency preparedness and response tools were held in Paris. - 21-25 January 2019 FASTNET School organized by ENEA and IRSN. As part of the activities related to Dissemination and Education & Training, a School dedicated to EP&R was organized. Aim of the School was to give a picture of the whole chain of competences needed to manage nuclear emergencies at NPPs, including those pertaining to the methods and tools developed within FASTNET to estimate quickly the source term. The School was open not only to FASTNET partners or members of the FASTNET End-Users Group (EUG), but also to any stakeholder potentially interested in strengthening its capabilities in the field of EP&R. - Presentation of the DSAs EPR capabilities in case of nuclear accidents at the side-event of General Conference at IAEA, 18 September 2019 WP#1 Scenarios database - A review of the scenarios database documents were made to find if this suits to our needs. WP#2 Emergency Preparedness -Review of the following documents as deliverables of the projects - RASTEP probabilistic method to all existing and near future foreseen NPPs of the Europe

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.