Großwelzheim Nuclear Power Plant

The Kahl plant was the first nuclear power plant ever to be built in Germany. It was located in Karlstein am Main and was an (at the time) experimental boiling water reactor. It was built by General Electric and supplied by Siemens. At the end of 2008, the demolition works had been finished. The station was the subject of the 1961 short documentary film, Kahl.

The Kahl is a river in the northern Spessart in Bavaria and Hesse, Germany. It is a right tributary of the Main and is 35.6 km (22.1 mi) long. The name Kahl comes from the Old High German word kaldaha, which means cool and clear. The Kahl rises from two sources left and right of the road at the foot of the Spessart hills, near Kleinkahl. These springs produce 50–60 litres per second. The Kahl flows into the river Main in Kahl am Main. The mouth is near the old Kahl Nuclear Power Plant. The largest tributaries are Westerbach, Sommerkahl, Reichenbach and Geiselbach.

Kahl am Main (officially Kahl a. Main) is a community in the Aschaffenburg district in the Regierungsbezirk of Lower Franconia (Unterfranken) in Bavaria, Germany. It has around 7,500 inhabitants.

Großkrotzenburg is a municipality in the Main-Kinzig district, in Hesse, Germany. It has a population of around 7,500. The town is mainly known for its swimming lake and its coal-fired power station.

Seligenstadt is a town in the Offenbach district in the Regierungsbezirk of Darmstadt in Hesse, Germany. Seligenstadt is one of Germany's oldest towns and was already of great importance in Carolingian times.

Karlstein am Main (officially Karlstein a. Main) is a municipality in the Aschaffenburg district in the Regierungsbezirk of Lower Franconia (Unterfranken) in Bavaria, Germany. It is the westernmost settlement in Bavaria. Karlstein's Ortsteile (constituent villages) are Dettingen and Großwelzheim, the former being notable as the site of the Battle of Dettingen during the War of the Austrian Succession. In the 20th century, the town was the site of the, now decommissioned, Großwelzheim Nuclear Power Plant.

The Battle of Dettingen (German: Schlacht bei Dettingen) took place on 27 June 1743 during the War of the Austrian Succession at Dettingen in the Electorate of Mainz, Holy Roman Empire (now Karlstein am Main in Bavaria). It was fought between a Pragmatic Army, composed of the British, Hanoverian and Austrian troops, and a French army commanded by the duc de Noailles. While the Earl of Stair exercised operational control, the Allied army was nominally commanded by King George II, accompanied by his son the Duke of Cumberland. As a result, it is now best remembered as the last time a reigning British monarch led troops in combat. Despite being an Allied victory, the battle had little effect on the wider war, and has been described as 'a happy escape, rather than a great victory.'

Mainhausen is a municipality of over 9,000 in the Offenbach district in the Regierungsbezirk of Darmstadt in Hesse, Germany.

Großkrotzenburg Power Station (German: Kraftwerk Staudinger) is a modern coal-fired thermal power station in Großkrotzenburg, Hesse, east of Frankfurt, Germany. It comprises five units with a total capacity of approximately 1900 MW. The units were built between 1965 and 1992. Units 1-3 were decommissioned in 2012 and 2013. A characteristic of this power station is the fact that the most recently built unit, Unit 5, uses the updraught from the existing cooling towers as stack. The power station is operated by Uniper.

DCF77 is a German longwave time signal and standard-frequency radio station. It started service as a standard-frequency station on 1 January 1959. In June 1973 date and time information was added. Its primary and backup transmitter are located at 50°0′56″N 9°00′39″E in Mainflingen, about 25 km south-east of Frankfurt am Main, Germany. The transmitter generates a nominal power of 50 kW, of which about 30 to 35 kW can be radiated via a T-antenna. DCF77 is controlled by the Physikalisch-Technische Bundesanstalt (PTB), Germany's national physics laboratory and transmits in continuous operation (24 hours). It is operated by Media Broadcast GmbH (previously a subsidiary of Deutsche Telekom AG), on behalf of the PTB. With Media Broadcast GmbH, a temporal transmission availability of at least 99.7% per year or under 26.28 hours of annual downtime has been agreed upon. Most service interruptions are short-term disconnections of under two minutes. Longer lasting transmission service interruptions are generally caused by strong winds, freezing rain or snow-induced T-antenna movement. This manifests itself in electrical detuning of the antenna resonance circuit and hence a measurable phase modulation of the received signal. When the maladjustment is too large, the transmitter is taken out of service temporarily. In the year 2002, almost 99.95% availability, or just over 4.38 hours of downtime, was realized. The timestamp sent is either in Coordinated Universal Time (UTC)+1 or UTC+2 depending on daylight saving time.The highly accurate 77.5 kHz (3868.2897806 m wavelength) carrier signal is generated from local atomic clocks that are linked with the German master clocks at the PTB in Braunschweig. The DCF77 time signal is used for the dissemination of the German national legal time to the public.Radio clocks and watches have been very popular in Europe since the late 1980s and, in mainland Europe, most of them use the DCF77 signal to set their time automatically. The DCF77 longwave radio emission offers penetration into buildings and the time-transmissions can be received by small ferrite antennas incorporated in the case of radio-controlled low-cost time keepers without the help of exterior antennas. The accuracy of the DCF77 amplitude-modulated time signals suffices for the every-day use of clocks and watches by consumers where primarily the long-term accuracy matters. Further industrial time-keeping systems at railway stations, in the field of telecommunication and information technology, and at radio and TV stations are radio-controlled by DCF77 as well as tariff change-over clocks of energy supply companies and clocks in traffic-light facilities.

Forchbach is a small river of Bavaria, Germany. It flows into the Main in Karlstein am Main.

Mainflingen is a village and part (Ortsteil) of the municipality Mainhausen, in the district of Offenbach in Hesse with about 4000 inhabitants. It is known for its time signal transmitter, DCF77, which controls almost all radio clocks in Western Europe.