While at nominal power effort was in progress to repair the faulty pressure gauge of the main safety valve (MSV) control system of the primary circuit. In the course of this activity 2 MSVs out of 12 opened, and the steam was received by the accident isolation system as designed. Partial steam release to envorinment occurred through the clean air venting facility of the isolation system decay chamber. Permissible limits for activity release to environment were not exceedd. Once personnel activated the lines of forced closure, the above two valves closed. Repair of the faulty pressure gauge was performed without the established work program combined with the failure to take technical measures aimed at preventing unauthorized opening of MSVs. BASIS FOR RATING: Initiator - coolant leak from the safety valve system. Criterion - degradation of defence-in-depth. Intital event - real, potential. Safety function availability: full, which corresponds to level 1/2 (A-2R). The event cause reveals deficiencies in the safety culture. Therefore the higher level out of the above two has been chosen. DIFFICULTIES IN RATING:
An analysis by the Norwegian NGO Bellona of transborder trade operations with the customs code 840130 (irradiated fuel assemblies or fuel elements) show a more than twofold increase of import to EU countries of fresh nuclear fuel in cash terms – from 280 million Euros in 2022 to 686 million Euros in 2023. In physical […]
The French government has said it is "seriously" studying the option of building a plant to convert and enrich reprocessed uranium to cut its reliance on Russia following the invasion of Ukraine. The only plant in the world that currently converts reprocessed uranium for use in nuclear power plants is in Russia. "The option of […]
Jan vd Putte quickly changed from dressing as the pied piper at the protest during the IAEA nuclear power conference to warn for the Russian nuclear power conglomerate Rosatom and its role in Ukraine.
Anke Herold, Executive Director Oeko-Institut, Freiburg (Germany), in Brussels about the claim to triple nuclear by 2050: IPCC scenarios vs forecast development of nuclear.