Optimization of the Tube-Bundle Arrangement in Horizontal Steam Generators

Trunov, N. B.; Dragunov, Yu. G.

doi:10.1023/b:aten.0000045696.90836.cf

Cited by 3 publications

(3 citation statements)

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“…In this regard, serious requirements are formulated on the moisture of the steam leaving the SG in order to prevent erosive wear of the turbine blades. To ensure the required moisture value in horizontal SGs, a gravitational separation scheme is used [2], based on a noticeable difference in the specific weights of steam and water, which allows a significant number of quiet large drops of water, carried upward by the steam flow from the evaporation surface, to return there again. Only a small number of droplets approach the steam outlet tubes, the mass of which is so small that gravitational forces cannot overcome the dynamic flow of the steam flow.…”

Section: Introductionmentioning

confidence: 99%

Study of hydrodynamic processes in a two-phase layer above a submerged perforated sheet

Melikhov,

Tokarev

2024

E3S Web of Conf.

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To study the hydrodynamics of a two-phase flow over a submerged perforated sheet (SPS) and the entrainment of water droplets from the water-air interface, a “Bubbler” installation was built. The main observation tool was video recording of the process followed by data analysis. An SPS with two holes was used. Three experiments were performed with different air flow rates. A general picture of air flow was established: the rise of bubbles in the water volume under the SPS, the formation of an air blanket, air bubbling in the layer of water above the SPS, the formation and jump of water drops upward. For each air flow rate, the size of the bubbles in the two-phase layer and the size of the resulting droplets were determined. It was found that with increasing air flow, these parameters increase.

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Section: Introductionmentioning

confidence: 99%

Study of hydrodynamic processes in a two-phase layer above a submerged perforated sheet

Melikhov,

Tokarev

2024

E3S Web of Conf.

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“…In addition, decreasing the spacing increases the specific volume heat load, increases the danger of contamination of the tubes, degrades the circulation, and ultimately decreases reliability. The tube arrangement and spacing in PGV-1500 were chosen on the basis of comprehensive optimization taking account of operating experience [4].…”

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confidence: 99%

“…It should be noted that in formulating the design the problem of minimizing the mass and size characteristics was not posed. On the basis of [4], it is obvious that this problem contradicts the attainment of high reliability and safety indicators. Economic calculations show that any economy achieved due to mass is rapidly nullified even for isolated cases of nuclear power plants which are idle as a result of the failure of a steam generator.…”

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confidence: 99%

PGV-1500 steam generator. New problems and solutions

Dragunov¹,

Lukasevich²,

Trunov³

et al. 2005

At Energy

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The basic questions concerning the development of a steam generator for a nuclear power plant with a VVÉR-1500 reactor are presented. The basic design requirements which follow for steam generators from experience in operating analogs at nuclear power plants and taking account of the requirements for a reactor system are presented. The special features inherent to horizontal-type steam generators, which have been mastered and are used in nuclear power plants in our country, are noted. The domestic and world operating experience is taken into account in the development of the design. It is concluded that the design of the PGV-1500 steam generator satisfies the requirements for the concept of a VVÉR reactor facility for a 1500 MW(e) unit of a nuclear power plant and is competitive on the world market for power-generating equipment for nuclear power plants.An important problem at the present time is to develop high-capacity nuclear power plants which are competitive in the world energy market. The development of a reliable steam generator which operates without failure is one of the main directions in solving this problem.The main requirements which the new steam generator must satisfy are:• the evolutionary principle of development with maximum use of positive experience must be employed in the development work;• the scheme of the steam generator and the design of its elements must provide the required steam productivity and parameters in all operating regimes of the nuclear plant;• all components of the steam generator must operate reliably and safely; • corrosion processes must be eliminated or reduced substantially; • the design must be simple and easy to assemble and operate, the time and dose-usage for service operations and maintenance must be reduced to a minimum;• the dimensions must allow for placement in a protective shell with prescribed dimensions;• the questions of shipment during fabrication and to the assembly site at the nuclear power plant must be solved;• the drawbacks of the steam generators used in nuclear power plants with VVÉR-440 and -1000 reactors must be eliminated or neutralized.The first question to be solved in designing VVÉR-1500 was the choice of steam generator -vertical or horizontal. The vertical generators used in nuclear power plants with PWR, certainly, have their own advantages and disadvantages [1]. Without making a detailed comparison of the two types of steam generators, we recall the main advantages of the horizontal generators:• the moderate steam load on the evaporation surface (0.2-0.3 m/sec) permits the use of a simple separation scheme with reliable supply of the required moisture in the steam;

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