Members of the research group have, within the Jožef Stefan Institute, which is an authorized expert organisation for radiation and nuclear safety, monitored the activities during the regular outage of the Krško nuclear power plant in 2015. The monitored outage activities consisted of testing of safety structures, systems and components, refueling activities, visual and ultrasound inspection of fuel elements and reactor physics related tests of core and startup tests of the reactor.
F.30 Professional assessment of the situation
COBISS.SI-ID: 28631335The expert opinion refers to the revised Krško nuclear power plant (NEK) safety upgrade program (SUP, Rev.2) and accompanying analysis reports, by which NEK justifies the appropriateness and integrity of their actions for prevention and mitigation of selected severe accidents. The changes in the SUP, compared to its last revision (approved by the Slovenian Nuclear Safety Administration), and the conceptual design of proposed alternate systems for core and containment cooling, were evaluated. The present expert opinion on revised SUP and accompanying reports has been based on the Jozef Stefan Institute expertise and experience, including deterministic analyses as well as international practice.
F.30 Professional assessment of the situation
COBISS.SI-ID: 28742695The Slovenian Agency for Radwaste Management (ARAO) is planning the construction of a repository for low and intermediate level radioactive waste in the next few years. At present, ARAO is preparing the document "Project design basis for low and intermediate level radioactive waste repository Vrbina, Krško", Rev.0. Members of the program group have, as Jožef Stefan Institute experts, prepared a review of the document. The review was focused on compliance with the Slovenian nuclear legislation. In addition, the compliance with international regulations, recommendations and examples of good practice in the field of radioactive waste disposal were also addressed.
F.30 Professional assessment of the situation
COBISS.SI-ID: 28884263The one-week training course on “Requirements and safety evaluation for NPP SAR”, was the fourth dedicated course in Europe of the 3rd Phase INSC (Instrument for Nuclear Safety Cooperation) funded Project on Training and Tutoring of Nuclear Regulatory Authorities and Technical Safety Organisation staff. The course considered the content and structure of the Safety Analysis Report (SAR) of a nuclear power plant (NPP) at different stages; the safety objectives, principles and requirements to be applied for the design of a NPP, including the safety requirements after the accident in Fukushima (Japan); the content of the safety analyses (justification) to be elaborated for licensing and their characteristics in terms of completeness, adequacy and auditability; the regulatory organization and management activity to review the SAR. The training course consisted of 30 lectures.
F.03 Increased qualifications of the research and development staff
COBISS.SI-ID: 29095719The method and apparatus for assessing the state of a spent-fuel facility are based on monitoring the trend of measurable parameters that are directly related to the coolant level elevation in the spent fuel pit. They enable early detection of consequences of the initiating event, characterizes eventual damage in the spent fuel pit (SFP) envelope and predicts further development of the event. In fact, by precisely measuring the trends of either coolant leakage, cooling water level elevation or dose rate at the edge of the pool during short period of time after initiating event, it is possible to assess the eventual crack in the SFP envelope and, for given scenarios, provide predictions of the cooling water level elevation, i.e., foreseeing dose rate at the edge of the pool, eventuality of uncovering the core, drawing attention to the risk of fire and large releases of radioactive materials into the environment.
F.33 Slovenian patent