Safety and Security

Panel „Safety and Security“

Chair: Uwe Rüppel (Technische Universität Darmstadt)

Due to the complexity of critical infrastructure systems and the importance of their reliable functioning for society it becomes necessary to pay prime attention to the safety and security of said networks. This includes, on the one hand, approaches or methods aimed at addressing individual infrastructures, such as disruption management strategies and other backup solutions. On the other hand it also takes into account how safety and security gain further relevance across closely coupled systems, for example the relevance of the emergency services during larger infrastructural breakdowns. In order to identify current weaknesses and improve existing procedures, this panel focusses on approaches that analyse the interdependencies at hand. The object of discussion is to be centred on mitigation options in planning, technical solutions for problems encountered when dealing with critical infrastructures as well as concepts for these networked systems in regard to their safety and security. Furthermore, case studies gives insights pertaining to relevant fields such as the criticality and vulnerability of said systems.


Thomas Köstler (Fire Department Lübeck):
Power failure in Lübeck including failure of the TETRA digital radio – measures for police and non-police emergency response

On 16 May 2018, around midday, electricity in Lübeck failed for almost four hours. In the course of the event, a digital exchange transit for TETRA (digital radio which is used by authorities and organisations with security tasks (BOS)) that connects several administrative districts and the city of Lübeck was also affected. During the power outage, the fire brigade had to move out to two triggered fire detection systems, ten stuck elevators, a fire with human life in danger and nine other assistance services. In addition, a turntable ladder with basket was provided at the damage site of the transformer station to support the network operator in quickly rectifying the fault. It was also necessary to supply emergency power to an intensive care residential community with six intensive care patients and an old people's home with an intensive care unit. The unexpected failure of the digital exchange transit for TETRA posed special challenges for the non-police emergency response. This practice-oriented lecture gives insights into the course of the mission with the measures of police and non-police emergency response as well as into the findings obtained subsequently.


Anna-Katharina Brauner, Arturo Crespo and Marcus Dombois (Technische Universität Darmstadt):
User-based Contingency Planning for Railway Disruptions Using Network Analysis

Common contingency planning for commuter railway (S-Bahn) networks is regularly conducted by relying on the experience of seasoned practitioners. These plans, also called disruption programs (DRPs), safeguard the smooth operational transitioning of the system to a degraded situation and the ability of passengers to reach their destinations. Such abilities become particularly critical for a system which services highly populated metropolitan areas. Although the DRPs are proficiently developed by the experts that run the system, relying on a single point of view may not be sufficient since taking a biased perspective towards the operational design is foreseeable. To escape from this local optimum solution and seek for a much more global perspective, the participation of multiple stakeholders becomes evident. Through participatory network analysis we propose a framework for enhancing the development of contingency plans for commuter railway networks and include a wider range of views. The developed approach is to be based on Frankfurt’s commuter railway network and includes a comparison with the existing contingency plans.


Sylvia Bach (Universität Wuppertal):
Towards a smart critical infrastructure! – Big data offers new chances for resilience.

In times of increasing dependency, complexity and vulnerability of critical infrastructures, providers prepare to challenge the dilemma of enhancing their resilience and efficient allocation of resources. The methodology framework of the EU project “SmartResilience” helps end-users to assess their resilience and identify weaknesses and improvement potential. New developments such as the digitalization support this process by gaining data which has not been available before.

We present the challenges of resilience assessment for critical infrastructures as well as scientific solutions from SmartResilience to manage these challenges. Using the example of Heidelberg’s suburb “Bahnstadt”, which is a new area with a smart electricity grid, the opportunities and risks of big data collection are presented and how it can be used for smart power control operations using real-time process data. The advantages of indicator-based resilience assessment will be discussed as well as the benefits for decision-makers who are working on new security and safety designs. This includes the interdependencies and networks within the organization and with external partners such as other critical infrastructures. Using the example of “Bahnstadt”, different scenarios from a table top exercise with experts are introduced and discussed from the resilience point of view.

Coauthors: Florian Brauner, Frank Fiedrich (Bergische Universität Wuppertal); Ruben Roque and Christian Becker (Stadtwerke Heidelberg)