Petrozavodsk Branch of JSC “AEM-Technology” (part of Atomenergomash, the machine-building division of the Rosatom State Corporation, and a member of Karelian Regional Wing of the Russian Engineering Union) manufactured and shipped a set of housings for reactor coolant pump sets (RCPS) for unit 1 of Rooppur nuclear power plant (People’s Republic of Bangladesh).
Weight of one casing is more than 31 tons with height of 3.5 m and width more than 3 m. The cargo weight, including a fastening element — spacer, is about 50 tons. The items are delivered by means of automotive transport to the sea port of Saint-Petersburg for loading aboard ship.
During manufacturing of the RCPS housings they are subject to various kinds of inspection, including X-ray inspection. A range of tests is also carried out. The most important of them is the final hydraulic test, during which the assembled item is held under pressure of 24.5 MPa for 10 minutes. After favourable results are obtained for every test and inspection, a test assembly of spherical housing with spacer and inner cone is carried out by the manufacturer. The assembly units are shipped to the customer separately, including fasteners and accompanying documents.
The RCPS housings are safety class 1 items. At a nuclear plant the reactor coolant pump set ensures coolant circulation from the reactor to steam generator and operates under pressure of 160 atmospheres and temperature of 300 degrees. Delivery scope for one unit consists of four spherical RCPS housings with spacers.
The Rooppur NPP is designed and built from the Russian design. The design and building is carried out by the Engineering subdivision of Rosatom State Corporation. The power plant will consist of two units with VVER reactors. Their service life is 60 years, after expiration it can be prolonged for 20 more years. Each unit will have 1200 MW of power. “AEM-technology” produces main reactor room equipment for two power plant units.