ROSATOM's nuclear fuel manufacturer subsidiary TVEL has announced its delivery of a batch of fuel assemblies for a universal nuclear icebreaker of the new generation of Arktika.The fuel assemblies, which were produced by TVEL's Chepetsky Mechanical Plant (ChMZ), consist of "seamless narrow-walled hexagonal pipes of zirconium alloy" with a wall thickness of about 1.6 mm, TVEL said yesterday.

They are a "unique and exclusive technology", which ChMZ have produced for the first time, together with scientists from the AA Bochvar Research Institute of Inorganic Materials (VNIINM), which is another Rosatom subsidiary. The fuel assemblies will be assembled by TVEL's Mashinostroitelny Zavod (Elemash) plant. The fuel is intended for use in RITM-200 reactors.

In January 2013, Rosatom called for bids to build two more of these universal icebreaker vessels (project 22220), for delivery in 2019 and 2020, and in May 2104 a contract for RUB84.4 billion was signed with United Shipbuilding Corporation. In August the same year, Russian regulator Rostechnadzor licensed Baltijsky Zavod Shipbuilding to install the RITM-200 reactor units from OKBM Afrikantov for the pilot model. The keel of the first, Arktika, was laid in November 2013, and that of the second, Sibir, in May 2015.

ZIO-Podolsk, part of Rosatom's engineering division Atomenergomash, said yesterday it had completed the assembly of the integrated building of the RITM-200 reactor for Sibir with the installation of steam generator "cassettes". Produced by JSC Afrikantov OKBM, each of the 12 cassettes weighs almost one-and-a-half tonnes. Now the reactor structure is being prepared for hydraulic testing, ZIO-Podolsk added.

RITM-200 reactors have 175 MWt each and are deigned to deliver 60 MW at the propellers via twin turbine-generators and three motors.
Source: World Nuclear News