The Company’s core business activities are the installation of technological equipment, pipelines and metalwork and welding of any complexity. The perfect quality of works is ensured by qualified welders who use state-of-the-art high-tech welding equipment. The reliability of welded joints is evaluated by the Company’s quality control laboratory that employs the full range of gamma-ray, X-ray and ultrasonic methods of control and is considered to be one of the best laboratories in the Northwest. 

The Company updates its equipment fleet and machinery and pays special attention to personnel training in its own training center. All this enables JSC MSU 90 to successfully overcome production problems of any complexity.

JSC MSU 90’s team has constructed eight power units for various Russian nuclear power plants, a reactor for the Nuclear Physics Institute of the Russian Academy of Sciences and a number of other industrial, military and civil facilities. The Company has reconstructed all four power units of the Leningrad Nuclear Power Plant, and specifically has replaced the reactor’s process channels.


  • installation of technological equipment;
  • installation of pipelines and metalwork;
  • mechanical and heating assembly;
  • maintenance and repair;
  • highly-precise welding; and
  • fabrication of pipelines, tanking equipment and metalworks.

Performance: The Company has installed over 1 million tons of equipment.


MSU 90 was founded as part of Energospetsmontazh Group in 1968. The Company’s experts have worked on all four units of the Leningrad NPP. After it was put into operation in 1981, they took part in the construction of two units of the Ignalina NPP (Lithuania), chemical plants in Uch-Kuduk (Uzbekistan), Zheltye Vody (Ukraine) and Sillamäe (Estonia), facilities of Mayak Association in Chelyabinsk-40, coastal repair facilities for the nuclear submarines of the Northern Fleet, mining and refining facilities in Sortavala and Krasnokamensk and the Radium Institute. They have fulfilled orders from various research institutions such as the Aleksandrov Institute of Research and Technology, Central Mechanical Engineering Design Bureau, D.V. Efremov Institute of Electrophysical Apparatus, Sosnovoborsk Design and Survey Institute VNIPIET, Leningrad Nuclear Physics Institute (now called Konstantinov Petersburg Nuclear Physics Institute) and Vavilov State Institute of Optics.

It is specifically worth mentioning that the Company’s installers have taken part in mitigating the consequences of the Chernobyl accident and the 1988 Armenian earthquake.

Main projects:

Leningrad NPP, Leningrad NPP-2, Baltic NPP, Konstantinov Petersburg Nuclear Physics Institute of the Russian Academy of Sciences and platform of the berth in the village of Gadzhiyevo of the Murmansk Region. 



Dmitriy Tantsurin, General Director

Tatyana Nesterova, Chief Accountant

Legal address:

64, Koporskoye Shosse, Leningrad Region, 188540 Sosnovy Bor

Mailing address:

P.O. Box 4, Leningrad Region, Sosnovy Bor 188540, Russia

Phone (Secretary) (81369) 7-39-39 

Fax  (Secretary) (813 69) 7-39-40

Phone/fax (Chief Accountant) (81369) 7-39-42

 e-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.

Bank details:

Settlement account 40702810332000001246, correspondent account 30101810600000000786

BIK 044030786 at the St. Petersburg Branch of OJSC Alfa Bank (St. Petersburg)

INN 4714000109

KPP 472601001

OGRN 1024701759939

OKPO 08620311

OKVED 45.25.4  28.11