At the end of November, Anastasiia Ilina, junior researcher of NPP Thermohydraulic and Probabilistic Safety Analysis Department of the State Scientific and Technical Center for Nuclear and Radiation Safety, participated in Probabilistic Safety Analysis Working Group meeting of WWER Regulators Forum.
The event was held on 27-29 November in Yerevan (Armenia). The representatives of NRSC (attended), STUK (Finland), SUJB (Check Republic), GRS (Germany), SSTC NRS (Ukraine), SEC NRS (Russia), HAEA (Hungary) attended this event.
As Anastasiia Ilina said, during working visit there was presented the preliminary revision of the feedback questionnaire which aimed at assessing the compliance of the national regulatory framework of the Working Group member states with requirements for lifetime extension and aging management, at comparing the experience of different countries with regard to the procedure of unit preparation for long-term operation and introduction of aging management, definition of conditions and listing of studies necessary for lifetime extension, etc. Participants of the Working Group were provided with a set of recommendations and proposals on improvement of the feedback questionnaire.
In addition, the participants discussed the results of processing of the feedback questionnaire on monitoring of maintenance effectiveness in part of comparison of the results of the most used indicators (for example, reliability, unpreparedness, test periodicity) to identify any significant differences and to find best practices that could improve the regulatory work at monitoring of this activity.
“The Ukrainian experts are responsible for the implementation of Task 2 “The use of probabilistic safety analysis for the lifetime management (lifetime extension)”. In the framework of this task it is planned to collect and compare national legislative and regulatory frameworks as well as national experience on power unit lifetime extension, including: power unit preparation for long-term operation (procedure, conditions, list of necessary research, etc.), aging management, PSA role in mentioned processes”, said Anastasiia Ilina.