FYI June 27, 2018

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On This Day

 
 
1954 – The Obninsk Nuclear Power Plant, the Soviet Union’s first nuclear power station, opens in Obninsk, near Moscow.
Obninsk Nuclear Power Plant, (Russian: Обнинская АЭС, Obninskaja AES [About this sound pronunciation (help·info)]), was built in the “Science City” of Obninsk,[1] Kaluga Oblast, about 110 km southwest of Moscow. It was the first grid-connected nuclear power plant in the world,[2] i.e. the first nuclear reactor that produced commercial electricity,[3] albeit at small scale.[4] It was located at the Institute of Physics and Power Engineering.[5] The plant is also known as APS-1 Obninsk (Atomic Power Station 1 Obninsk). It remained in operation between 1954 and 2002,[1] although its production of electricity for the grid ceased in 1959; thereafter it functioned as a research and isotope production plant only.[6]

According to Lev Kotchetkov, who was there at the time: “Although utilisation of generated heat was going on, and production of isotopes was even enhanced, the main task was to carry out experimental studies on 17 test loops installed in the reactor.”[1] The technology perfected in the Obninsk pilot plant[7] was later employed on a much larger scale in the RBMK reactors.[3]

Design
The single reactor unit at the plant, AM-1 (“Атом Мирный”, Atom Mirny, Russian for “Atoms for Peace”), had a total electrical capacity of 6 MW and a net capacity of around 5 MWe. Thermal output was 30 MW. It was a prototype design using a graphite moderator and water coolant. This reactor was a forerunner of the RBMK reactors.

The Obninsk reactor used 5% enriched Uranium; this percentage would be lowered for subsequent reactors.[8]

History
Construction started on 1 January 1951. First Criticality was achieved on 6 May 1954, and the first grid connection was made on 27 June 1954.[9][10] For around 4 years, until the opening of the Siberian Nuclear Power Station, Obninsk remained the only nuclear power reactor in the Soviet Union; the power plant remained active until April 29, 2002 when it was finally shut down. According to Kotchetkov, in its 48 years of operation there were no significant incidents resulting in personnel overdose or mortality, or radioactive release to the environment exceeding permissible limits.[1]

The next Soviet nuclear power plant to be connected to their grid was Beloyarsk Unit 1 in 1964 with a capacity of 100 MWe.[11]
 
 
 
 

Born On This Day

 
 

1906 – Catherine Cookson, English author and philanthropist (d. 1998)
Dame Catherine Ann Cookson, DBE (née McMullen; 27 June 1906 – 11 June 1998) was an English author. She became the United Kingdom’s most widely read novelist[citation needed], with sales topping 100 million, while retaining a relatively low profile in the world of celebrity writers. Her books were inspired by her deprived youth in South Tyneside, North East England, the setting for her novels.

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FYI

 
 

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Ideas

 
 
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