science

Seversk

Seversk is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Seversk rather than just read about it. In short: Seversk (Russian: Се́верск, IPA: [ˈsʲevʲɪrsk]) is a closed city in Tomsk Oblast, Russia, located 15 kilometers (9.3 mi) northwest of Tomsk on the right bank of the Tom River. The population was 108,590 at the 2010 census and 109,106 at the 2002 census.

Key takeaways

Seversk belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Seversk to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Seversk from memory before moving on to harder problems.

Reference excerpt

Seversk (Russian: Се́верск, IPA: [ˈsʲevʲɪrsk]) is a closed city in Tomsk Oblast, Russia, located 15 kilometers (9.3 mi) northwest of Tomsk on the right bank of the Tom River. The population was 108,590 at the 2010 census and 109,106 at the 2002 census. It was previously known as Pyaty Pochtovy (until 1949) and Tomsk-7 (until 1992).

Geography The city is located 15 kilometers (9.3 miles) northwest of Tomsk on the right bank of the Tom River.

Climate Seversk has a humid continental climate (Köppen climate classification Dfb) with warm summer. The annual average temperature is 0.6 °C (33.1 °F). The average temperature in January is between −21 and −13 °C (−6 and 9 °F). The average temperature in July is 19.2 °C (66.6 °F). The total annual rainfall is 530 millimeters (21 in).

History Founded in 1949, it was known as Pyaty Pochtovy (Пя́тый Почто́вый, lit. the Fifth Postal) until 1954 and as Tomsk-7 (Томск-7) until 1992. City status was granted to it in 1956.

Administrative and municipal status Within the framework of administrative divisions, it is, together with five rural localities, incorporated as Seversk City Under Oblast Jurisdiction—an administrative unit with the status equal to that of the districts. As a municipal division, Seversk City Under Oblast Jurisdiction is incorporated as Seversk Urban Okrug.

Economy Seversk is the site of the Siberian Chemical Combine, founded in 1954. It comprises several nuclear reactors and chemical plants for separation, enrichment, and reprocessing of uranium and plutonium. Following an agreement in March 2003 between Russia and the United States to shut down Russia's three remaining plutonium-producing reactors, two of the three plutonium producing reactors (the two that are situated in Seversk, at the Sibirskaya Nuclear Power Plant) were shut down. Nuclear warheads are produced and stored on the premises. One of the most serious nuclear accidents at SGCE occurred on April 6, 1993, when a tank containing a highly radioactive solution exploded (see § Tomsk-7 explosion).

Secret city

Seversk had been a secret city in the Soviet Union until President Boris Yeltsin decreed in 1992 that such cities could use their historical names. The town had not been marked on the official maps until then. As was the tradition with Soviet towns containing secret facilities, the designation "Tomsk-7" (like its predecessor "Pyaty Pochtovy") is simply a postal code which implies that the place is located close to the city of Tomsk. For many years, residents have been restricted from entering or leaving the city. Upon leaving Seversk, residents had to surrender their special entry passes at the checkpoint and it was forbidden to discuss where they worked or lived. In 1987, some restrictions were lifted due to the large number of residents who worked or studied in Tomsk. The city still remains closed to non-residents. There are six checkpoints where visitors must show entry documents. Permission to visit the city may only be granted by the appropriate authorities by a request of the institution being visited, or by a request of a private party such as a close relative. Visitors can apply for entry passes at the main checkpoint; prior to May 2007, they needed to visit a special office in Tomsk.

Tomsk-7 explosion There was a nuclear accident at the Tomsk-7 Reprocessing Complex on 6 April 1993, when a tank exploded due to formation of red oil, while nitric acid was being added to a plutonium-uranium mixture. The explosion had a force of approximately 100 kg of TNT and blew out a large section of the exterior wall of the high level radioactive processing room, releasing a cloud of radioactive gas. The cloud was dispersed northwards by the wind, with some of the radioactive material settling over the neighboring village of Georgiyevka. TIME magazine has identified the Tomsk-7 explosion as one of the world's 10 "worst nuclear disasters". The International Atomic Energy Agency considers the event a Level 3 "serious incident".

Culture Seversk has nine municipal cultural and artistic institutions, as well as four establishments of additional education for children of artistic and aesthetic focus. There is also a nonprofit organization, Ostrovsky House of Culture, and a cinema called Mir.

Education There is a major post-secondary school in the city, the Seversk State Technological Academy, a branch of Moscow Engineering Physics Institute.

Notable people from Seversk Anastasia Shishmakova (born 2000), Russian group rhythmic gymnast. Margarita Aliychuk (born 1990), Russian group rhythmic gymnast and Olympic champion Lyubov Yegorova (born 1966), cross-country skier and Olympic champion

See also Kyshtym disaster List of closed cities

References

Notes

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Seversk

Start with the simplest possible case. Write down what Seversk claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Seversk before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Seversk ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Seversk

In research: Seversk appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Seversk in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Seversk is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cities and towns built in the Soviet Union, Cities and towns in Tomsk Oblast, Closed cities in Russia, so understanding it makes those chapters shorter.
In everyday life: Look for Seversk outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Seversk in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Seversk means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Seversk out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Seversk in simple terms?

Why does Seversk matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Seversk?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Seversk.