The Gösgen nuclear power plant in Däniken in canton Solothurn is not producing any electricity until further notice. The operator must provide evidence of fallback in case of a possible overload in the feedwater pipework system. The supervisory authority ENSI has not given any time frame for this. The safety scenarios are very comprehensive and require more time to prepare than originally planned, the media office of the Gösgen-Däniken nuclear power plant said on Tuesday in response to an enquiry from the Keystone-SDA news agency. +Get the most important news from Switzerland in your inbox Submission of readiness evidence to the Swiss Federal Nuclear Safety Inspectorate (ENSI) will depend on the progress of the preparation. In response to an enquiry, the ENSI media office did not provide any information on how long it will take to review the documents. "We cannot estimate this at present," it said. Annual review has long been completed Three weeks ago, the operator announced that ...