Consideration of field experience in developing new projects of steam generators for nuclear power stations equipped with VVER reactors

Trunov, N. B.; Denisov, V. V.; Kharchenko, S. A.; Lukasevich, B. I.

doi:10.1134/s004060150601006x

Cited by 11 publications

(5 citation statements)

References 1 publication

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“…The acidic crevice pH was a concern regarding the integrity of the heat exchange tubes since the titanium-stabilized stainless steel is susceptible to ODSCC in an acidic environment. However, the plugging statistics were acceptable, and the trends do not show serious operability limitations up to 50 years [40][41][42].…”

Section: Steam Generatormentioning

confidence: 93%

Feasibility of Safe Operation of WWER-440-Type Nuclear Power Plants for Up to 60–70 Years

Katona

Biro²,

Ratkai³

2023

Energies

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Most WWER-440 reactors are operated over the planned operational lifetime of 30 years. Now, the owners/operators are preparing for the second phase of extending the operation. The paper presents an overview of the most important aspects of ageing of the main components of the WWER-440-type reactors based on the operational and ageing management experiences and primary research efforts supporting the operation. The paper aims to demonstrate that the expectations for the operability of these reactors for up to 60–70 years are realistic. The scope of the review is limited to the ageing of the reactor pressure vessel, vessel internals, and steam generator, which are the lifetime-limiting components besides the containment structure. Some of the corrective actions, improvements of in-service inspections, maintenance, and ageing management are also considered in the paper. It is shown that the selection of materials and unavoidable material degradation processes do not limit the operation of the WWER-440 reactors for up to 60–70 years under the established operational environment and ageing management practice.

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Section: Steam Generatormentioning

confidence: 93%

Feasibility of Safe Operation of WWER-440-Type Nuclear Power Plants for Up to 60–70 Years

Katona

Biro²,

Ratkai³

2023

Energies

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“…-превращение этой воды в пар; -циркуляция пароводяной смеси; -сепарация -отделение воды от пара. Значительная часть аварийных остановов АЭС вызвана, в частности, неполадка ми в парогенераторах [3,4].…”

Section: введение введение введение введение введениеunclassified

Vertical steam generators for VVER NPPs

Egorov

2018

YadEn

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“…-Conversion of thus heated water into water steam; -Circulation of steam-water mixture; -Separation of water from steam. A significant part of emergency shutdowns of NPPs is caused, in particular, by failures of steam generators [3,4].…”

Section: Introductionmentioning

confidence: 99%

Russian and foreign steam generators for NPP power units with wet steam turbines

et al. 2020

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The main aim of the current study is to analyze advantages and shortcomings of horizontal and vertical types of steam generator design. Design solutions and experience of operation of steam generators of horizontal type accepted in Russia and of vertical type applied by Westinghouse, Combustion Engineering, Siemens, Mitsubishi, Doosan were analyzed within the framework of the present study. It was established that steam generator equipment of horizontal type is characterized by disadvantages of design, technological and operational nature. Thus, horizontal steam generators with dimensions permissible for railroad transportation and, for VVER-1200 with reactor vessel diameter equal to 5 m, by water transport as well, have exhausted the possibilities for further significant increase of the per unit electric power. The demonstrated advantages of vertical-type steam generators are as follows: 1) absence of stagnant zones within the second cooling circuit; 2) uniformity of heat absorption efficiency of the heating surface that ensures improved conditions for moisture separation; 3) increased temperature drop with parameters of generated steam elevated by 0.3 – 0.4 MPa. Conclusion was made on the advisability of introduction of steam generators with vertical-type layout in the Russian nuclear power generation.

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Consideration of field experience in developing new projects of steam generators for nuclear power stations equipped with VVER reactors

Cited by 11 publications

References 1 publication

Feasibility of Safe Operation of WWER-440-Type Nuclear Power Plants for Up to 60–70 Years

Feasibility of Safe Operation of WWER-440-Type Nuclear Power Plants for Up to 60–70 Years

Vertical steam generators for VVER NPPs

Russian and foreign steam generators for NPP power units with wet steam turbines

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