Publication

New hydraulic gallery to improve operation conditions at the Emosson hydro scheme

2016
Conference Papers

Abstract

A new hydraulic gallery was constructed to increase operational resilience and mitigate risks of Emosson hydropower scheme in the Swiss-French Alps. One of the main constraints of the operation is to avoid the overflow of the so called "Corbes" surge chimney during pumping, if the upstream valve is closed. While this scenario is very rare and happened only three times since the commissioning of the dam in 1973, it is considered as a critical issue for operation of the scheme due to the high risk of this event. Different solutions have been studied to avoid the overflow of the surge chimney. However, the safest solution was to create a new gallery bringing water from the top of the surge chimney to the Emosson Reservoir. However, the execution of the new so-called "Corbes" Gallery took place in challenging alpine conditions with difficult access and a very tight schedule.

Official source

https://infoscience.epfl.ch/entities/publication/055ed4ec-5050-4927-a02a-69859851686e

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2016
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/055ed4ec-5050-4927-a02a-69859851686e

About this result

Related concepts (32)

Risk

In simple terms, risk is the possibility of something bad happening. Risk involves uncertainty about the effects/implications of an activity with respect to something that humans value (such as health, well-being, wealth, property or the environment), often focusing on negative, undesirable consequences. Many different definitions have been proposed. The international standard definition of risk for common understanding in different applications is "effect of uncertainty on objectives".

Dam

A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aquaculture, and navigability. Hydropower is often used in conjunction with dams to generate electricity. A dam can also be used to collect or store water which can be evenly distributed between locations.

Risk management

Risk management is the identification, evaluation, and prioritization of risks (defined in ISO 31000 as the effect of uncertainty on objectives) followed by coordinated and economical application of resources to minimize, monitor, and control the probability or impact of unfortunate events or to maximize the realization of opportunities.

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New hydraulic gallery to improve operation conditions at the Emosson hydro scheme

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