Obninsk is a city of 116,000 people (2021) in Kaluga Oblast on the bank of the Protva River. The new city of Obninsk was developed after World War II as a scientific city specializing in nuclear physics and atomic energy, meteorology, radiology, radiation chemistry and geophysics. It is home to many scientific research institutes.
Obninsk was the first science city in the USSR. In 1945, the First Research Institute Laboratory "V", which later became known as IPPE, was founded. On June 27, 1954, Obninsk started operations of the world's first nuclear power plant to generate electricity for a power grid. The city was built next to the plant in order to support it. Scientists, engineers, construction workers, teachers and other professionals moved to Obninsk from all over the Soviet Union.
Obninsk has cold and snowy winters and warm, humid summers. The average temperature in January is around -9 °C, and in July around +18 °C. Spring is cool, the average temperature in March is approximately −3 °C, in April +5.5 °C, and in May +12.3 °C. Autumn is moderately cool, in September the average temperature is +11 °C, in October +5 °C, and in November -1.5 °C. The average annual relative humidity is about 76-78%.
It is 100 km (62 mi) southwest of Moscow, and 80 km (50 mi) northeast of Kaluga along the Kaluga A130 highway.
The city is on the main rail line between Moscow and Kyiv and at the intersection of Kyiv and Warsaw highways. Three international airports are within reach from Obninsk: Vnukovo (70 km), Domodedovo (100 km), and Sheremetyevo (130 km).
Primary administrative division