Authors & Affiliations
Beznosov A.V., Bokova T.A., Bokov P.A., Marov A.R., Volkov N.S., Lvov A.V.
Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Nizhny Novgorod, Russia
Beznosov A.V. – Professor, Department of ATS, Dr. Sci. (Tech.).
Bokova T.A. – Associate Professor, Department of ATS, Cand. Sci. (Tech.).
Bokov P.A. – Ph.D., Associate Professor, Department of ATS.
Marov A.R. – Postgraduate Student, Engineer of the Department ATS. Contacts: 24, Minin st., Nizhny Novgorod, Russia, 603950. Tel.: +7 (920) 048-10-37; e-mail:
Lvov A.V. – Engineer of the Department ATS.
Volkov N.S. – Postgraduate Student, Assistant of the Department ATS.
Abstract
An analysis of the experience of working with sliding bearings of various types of pumps under conditions of alkali metals and heavy liquid metal coolant (lead, lead-bismuth) at reactor plants (RU) of nuclear submarines, power reactors with a sodium coolant, at the experimental stands of NNSTU is presented. This experience is applicable both to power reactors with high temperatures of a heavy liquid metal coolant (400–550 °C), and partly to accelerator-controlled systems and research reactors with a temperature of a heavy liquid metal coolant (HLMC) of the order of 200–350 °C. The problem of coolant technology for reactor plants with a temperature of a heavy liquid metal coolant of 200–350 °C is posed. Current technologies cannot provide sufficient cleanliness of the coolant at such temperatures, as well as effective regulation of the oxygen content in the coolant of the circulation loop. In this regard, the operation of various mechanisms, including sleeve bearings of pumps, may be disrupted due to emergency clogging of the bearing channels and other mechanisms with oxides of a heavy liquid metal coolant, since the coolant is oversaturated with oxygen. A small amount of oxygen leads to the disappearance of protective oxide coatings on the metal, which leads to the dissolution of the structural material of the circuit with a chemically active coolant. The choice of the plain bearing type for further studies of its performance at low temperatures of a heavy liquid-metal coolant has been substantiated. A research experimental stand was proposed on which the tests will be carried out. Based on the results of these experiments, various hydraulic and operational characteristics will be obtained during energy and resource tests.
Keywords
reactor installation, heavy liquid metal coolant (HLMC), lead, lead-bismuth eutectic, pump, technology of coolant, hydrodynamic bearing, hydrostatic bearing, dry friction bearing, non-contact
friction
Article Text (PDF, in Russian)
UDC 621.039.53