Atommash has performed a test assembly of the multifunctional fast research reactor - MBIR

2019-01-16 10:43:00

The Volgodonsk Branch of JSC"AEM-technology" (a part of the Rosatom engineering division - Atomenergomash) has performed the first stage of the test assembly of the world's multifunctional fast research reactor MBIR being constructed in Dimitrovgrad (Russia) at the site of JSC "SSC NIIAR".

The test assembly has been performed in a caisson with a depth of 20 meters. During the procedure, the reactor pressure vessel was installed on a special support using a crane, after which the height of the assembly unit exceeded 10 meters, diameter - 4 meters with a reactor pressure vessel weight of 60 tons. The cradle has been installed inside the reactor pressure vessel. It is designed to separate the coolant flows entering and leaving MBIR, organize the cooling of the reactor pressure vessel and the internals, and also location of the additional parts. The weight of the cradle is 25 tons, the length exceeds 5 meters, and the diameter is 3 meters. In some areas, specialists needed to ensure a uniform gap between the vessel and the reactor cradle of 70 mm.

The test assembly has been attended by a special representative of the State Corporation Rosatom for international and scientific projects Vyacheslav Pershukov. “Unique equipment is a unique enterprise. “Atommash, of course, has enough competencies,” he said. - The task is rather complicated for the whole Rosatom, including due to the large scope of international orders. To the best of its uniqueness, MBIR is not a priority for us from the point of view of commerce, but it is so from the point of view of reputation.”

“MBIR is a unique complex project, in the implementation of which several enterprises of the division take part: "Atommash", "Petrozavodskmash", and also the foundry "Petrozavodskmash", which participated in the manufacture of large-sized castings. Non-standard equipment always requires new tools and technical solutions that have been developed and used by our specialists,”-said Andrey Nikipelov, Director General of JSC "Atomenergomash".

In particular, due to the small metal thickness of the MBIR vessel (from 25 to 50 mm with a diameter of 4 meters - for comparison: the thickness of the VVER-1200 reactor pressure vessel is 300 mm) there are risks of changing equipment geometry during processing. For exact observance of parameters throughout the entire production of the reactor, a special purpose tooling was used.

The next steps in the manufacture of a research reactor will be hydraulic test, the assembly of a protective casing, after which the second stage of the test assembly will be completed with all the internals.

“This is an interesting project for us, an opportunity to find new effective decisions,” said Igor Kotov, Director General of JSC "AEM-Technology". - You can say a new chapter in history of nuclear energy is being written today on our site. MBIR is a fundamentally new product, and all operations performed by the "AEM-technology" team are performed for the first time. ”

"Atomenergomash" is the main equipment supplier of the MBIR reactor facility. On the basis of the Volgodonsk Branch of JSC "AEM-technology", 14 products will be manufactured for a multifunctional research reactor with a total weight of over 360 tons including internals and supporting structures.

The multifunctional fast research reactor (MBIR) will be the most powerful of the existing, constructed and designed research reactors in the world. The thermal capacity of the liquid sodium coolant reactor will be 150 MW. The unique technical characteristics of MBIR will allow solving a wide range of research tasks in support of the creation of new competitive and safe nuclear power plants, including fast neutron reactors for closing the nuclear fuel cycle. At the same time, the research time at MBIR, as compared with currently operating reactors, will be reduced several times.



MFRR infographics at



Test assembly video