Page - 1122 - in Book of Full Papers - Symposium Hydro Engineering

4. CONCLUDING REMARKS A multi-technical in-depth safety assessment is performed for large run-of- river hydropower plants along the Aar river, in Switzerland. The two plants dispose of continuous surveillance (regular function tests of all safety-critical installations and equipment and yearly inspections by external experienced engineer), continuous update of an archive with relevant documents, continuous structural maintenance, adequate monitoring instrumentation and redundant control technology. Further, as all operational and hazardous load cases meet the requirements, it is allowed to conclude that safety of both plants is guaranteed in accordance to the Swiss Dam Legislation. A team of experts (civil, mechanical and electrical engineers and geologists) can perform straightforwardly a total in-depth safety review of such hydropower plants within a reasonable timeframe. REFERENCES [1] SWISS FEDERAL OFFICE OF ENERGY, Enforcement Guideline of Dam Safety Legislation referred to the construction and operation of hydropower plants along the Aar river under direct SFOE supervision, SFOE Publication, 2015 (in German). [2] SWISS FEDERAL OFFICE OF ENERGY, Guidelines for Dam Safety - Part A – Generalities, SFOE Publication, 2015 (in German). [3] SWISS FEDERAL OFFICE OF ENERGY, Guidelines for Dam Safety - Part B – High hazard potential as subordination criterion, SFOE Publication, 2014 (in German). [4] SWISS FEDERAL OFFICE OF ENERGY, www.bfe.admin.ch [5] ICOLD, Selecting seismic parameters for large dams - Guidelines (revision of Bulletin 72), Bulletin 148, Committee on Seismic Aspects of Dam Design, Paris, 2016 [6] SWISS SEISMOLGICAL SERVICE, www.seismo.ethz.ch [7] EUROCODE 8, Design of structures for earthquake resistance - Part 1: General rules, seismic actions and rules for buildings, DIN EN 1998-1, Germany, 2010 [8] W.D. L. FINN, Soil dynamics and liquefaction of sand, Proceedings of the International Conference on Microzonation for safer Construction-Research and Application, Seattle, Wash, 1972 [9] H.B. SEED, I.M. IDRISS, „Ground Motions and Soil Liquefaction during Earthquakes”, Engineering Monograph on Earthquake Criteria, Structural Design and Strong Motion Records”, EERC, 1982 1122