Summary Report of the 525th RSK Meeting

The RSK discussed issues related to its statement “Requirements for the cooling of the fuel assemblies in the spent fuel pool during residual operation” with regard to the implementation in the operating rules of the plants. Furthermore, the RSK was informed about the discussions in the Committee on PLANT AND SYSTEMS ENGINEERING (AST) on possible effects of heavy rain events on nuclear installations. The consultations are to be continued and the results documented in a status report.

From the discussions in the Committee on ELECTRIC INSTALLATIONS (EE) on the impact of critical vulnerabilities in the log4j Java library, the need for further measures could not have been inferred so far.

An RSK member explained the importance of the parameter “steam rate flux” in the context of the increased corrosion detected on M5 cladding tubes and presented his assessment of factors for the increased corrosion on these cladding tubes.