Calculation of heat removal in a channel with a field tube

An examination is made of heat removal in experimental nuclear reactor channels in the form of a Field tube for forced and natural circulation of the heat carrier.     

Deep multilevel basements in strata prone to slump-type settlement

A technico-economic comparison is made between work production for site development and substructure installation for the construction of multistory buildings with deep multilevel basements and buildings without basements on soils classed as type II in terms of proneness to slump-type settlement and on ordinary soils not prone to this type of settlement. The high economy of buildings with deep basements is established for soils prone to slump-type settlement. Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 4, pp. 14–17, July–August 1997.     

New technique for construction of compacted beds in collapsible soils

Conclusions 1. The construction of compacted soil beds makes it possible to eliminate the collapsibility properties of soils in the bases of buildings and structures to a depth of 8–12 m. The dry density of the soil in the compacted soil mass was 1.73–1.80 tons/m³.2. In the upper part of the soil bed, to a depth of 1.0-1-3 m a decompressed soil layer with _d=1.35–1.55 tons/m³ is formed, which must be additionally compacted with heavy rammers.3. The moduli of deformation of the soils at the tamped soil bed in the pressure range 0–4 MPa are 18–21 MPa.4. To prevent bulging out at the soil to the surface, tamping of the material at the face and filling of the trench hollow must be carried out to a "refusal" equal to 10 cm per blow.5. Use of tamped soil beds is recommended for buildings with on equivalent pressure equal to or exceeding 0.1 MPa in collapsible soils with 1.6_d1.4 tons/m³ and in fill soils with _d1.6 tons/m³. The corresponding natural water content of the soil should be in the range w_p+0.04ww_p–0.04.VNIIOSP Institute. "Orgatroi" Trust of the Ministry of Construction of the Moldavian SSR. Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 3, pp. 7–9, May–June, 1988.     

Use of pile foundations in soils classed as type II in terms of proneness to slump-type settlement and compacted with wetting

Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 5, pp. 12–15, September–October, 1989.     

Results of tests on foundations in rammed down foundation pits in Darkhan (MPR)

Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 2, pp. 26–28, March–April, 1991.     

Unanticipated accidents in sodium-cooled fast reactors

The definitions and requirements of normative documents for unanticipated accidents at nuclear power plants with fast reactors are analyzed. Definitions are constructed between one another and with a collection of scenarios which can lead to unanticipated accidents, likewise determined by normative documents independently of the probability of these accidents actually happening. It is concluded that the normative approaches to fast-reactor safety must be refined with respect to strengthening the probabilistic criteria as a tool limiting the list of required unanticipated accidents for validating reactor safety. Special attention is devoted to the need to strengthen the motivation of designers to make the maximum possible use of passively triggered safety systems.     

Chemical reactions in the Mo-W-Al<Subscript>2</Subscript>O<Subscript>3</Subscript> system at 2400 K and 100 Pa

We examine the behavior of the Mo-W-Al₂O₃ system at T = 2400 K and p = 100 Pa and identify the main chemical reactions that lead to the oxidation of Mo and W. The results indicate that, under these thermodynamic conditions, direct reaction between Mo, W, and molten Al₂O₃ is impossible, and oxidation processes are indirect and involve vapor species. For a Mo: W: Al₂O₃ molar ratio of 1: 1: 1, we calculate the gas-phase composition and demonstrate that the predominant vapor species are Al, AlO, Al₂O, MoO, MoO₂, and WO₃.