電化の視座：TA-SWISS研究「新規原子力技術：スイスエネルギーシステムへの整理」要約版

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:費用最適化モデルで原子力と再エネ拡大の補完関係を定量化する手法が参考になる。

🏢実務担当者:電源調達・長期脱炭素計画において原子力を補完的選択肢として評価する際のリスク要因を把握できる。

🏛政策担当者:原子力導入には国家リスク分担・許認可制度・人材育成の制度的整備が不可欠という示唆を得られる。

New nuclear reactors in Switzerland – key points in brief On the basis of three scenarios, the TA-SWISS study sets out to identify the  contribution that new nuclear reactors could make towards the country’s overall electricity supply in the period up to 2070. The cost-optimised models show, among other things, that even if a new reactor were to be constructed, it would not be feasible to waive the expansion of renewable energy sources. The study does not speak in favour of either the construction of new nuclear power plants, or the retention of the current prohibition of new facilities. Instead, it deals with the conditions under which a contribution by new nuclear technologies towards Switzerland’s energy supply would be possible. The interdisciplinary study thus creates a knowledge base that extends beyond a strictly techno-economic analysis and can be understood as a contribution towards the social debate, without pre-empting its outcome. New nuclear reactors: opportunities… In the Swiss context, new nuclear power can, under certain circumstances, make a relevant, supplementary contribution towards the country’s energy supply: above all, if it is available without delay, its costs are not too high, financing and project risks remain acceptable, and the regulatory and institutional prerequisites are created. New nuclear reactors could also help offset the foreseeable electricity production shortfall in winter months. Furthermore, they would contribute towards a reduction of greenhouse gas emissions from the Swiss energy system. In view of the constantly growing demand for electricity, with new reactors it would be possible to cut Switzerland’s electricity imports, and thus limit its dependence on supplies from other countries. Thanks to new reactors, there would be more room for manoeuvre for the transformation of Switzerland’s energy supply, because they could balance the production peaks and shortages that go hand in hand with renewable energy sources. ...and risks... The construction of a nuclear reactor would be extremely expensive. Without state risk distribution instruments this would be barely financeable. But the existing legal framework does not provide for any contribution from the federal government towards the costs of energy production facilities. The construction costs of a new reactor are very difficult to estimate. Projects in other countries have shown that the necessary investments have been underestimated, partly because the planning procedure is extremely complex and it has not been possible to meet the specified deadlines. In the discussions concerning the possibility of constructing a new reactor, society remains divided. The socio-political analysis shows that a stable majority in favour of the construction of new nuclear power plants is currently not foreseeable. The current licensing procedures are above all oriented on conventional light-water reactors, and it would be difficult to apply them to facilities comprising several smaller modules. In the past few years, only a handful of reactors have been constructed in western industrialised nations. Thus many companies that could be involved in a construction project do not possess the necessary know-how. In uncertain geopolitical times, the distribution of nuclear material for terrorism or military purposes remains a risk that is tending to increase. ...plus some options for action Both the social debate on the Swiss energy system and the overall energy strategy should be carried out from a sound knowledge base. This includes in particular data relating to sustainability and to the lifecycle of all the various energy sources. The pros and cons of the various options must be described transparently and weighed against the competing social objectives. Switzerland needs a coherent overall strategy for its energy production and supply. The importance of hydropower, the role of solar and wind power, import relationships and storage capacities have to be taken into consideration equally and aligned with the foreseeable electricity demand. The longer-term use of the existing nuclear facilities and the potential construction of new reactors should be included in the deliberations. It is not only for the construction of a new nuclear reactor that there would be a need for proven experts: the dismantling of existing facilities and inspection of reactors currently in operation also require personnel with the necessary expertise. A plan should therefore be developed that combines the retention and promotion of the existing Swiss nuclear know-how with the requirements placed on the potential future construction of nuclear energy facilities. New nuclear power plants do not substitute either the expansion of renewable energy or the networks and storage facilities, but they could supplement these under certain circumstances. In the scenarios presented in the study, the long-term operation of the existing nuclear power plants represents the most cost-effective option.

• Zenodo https://zenodo.org/records/23532808first seen 2026-10-28 04:14:44