Izvestiya vuzov. Yadernaya Energetika

The peer-reviewed scientific and technology journal. ISSN: 0204-3327

Computational and Experimental Justification of Increasing the Efficiency of the Regenerative Heat Exchanger of the Steam Generator Purge System of the NPP-2006 Project (RU V-392M)

6/20/2022 2022 - #02 Nuclear power plants

Yaurov S.V. Borovoy A.V. Yudin A.V. Bolgov M.V. Danilov А.D.

DOI: https://doi.org/10.26583/npe.2022.2.03

UDC: 621.039

The design and operating modes of the regenerative heat exchanger (RHE) of the purge and drainage system of steam generators of power units No. 1, 2 of Novovoronezh NPP-2 (AES-2006 project) are considered.

The results of mathematical modeling of the operating modes of the heat exchanger in order to identify the causes of low efficiency are presented.

Based on the results of the commissioning of the purge and drainage system of the steam generators of the Novovoronezh NPP-2 unit No. 1, as well as the thermohydraulic calculations of the RHE operating modes, the authors of the article put forward assumptions regarding changes in the re-routing of the strapping pipelines [1 – 3]. At unit No. 2 of Novovoronezh NPP-2, the RHE binding was upgraded according to the proposals of the authors of the article.

The modernization in the RHE binding was implemented first at unit No. 2 at the installation stage of the systems, and after confirming the expected result, it was applied in April 2020 at unit No. 1 of Novovoronezh NPP-2.

A comparative analysis of the test results of the thermohydraulic characteristics of regenerative heat exchangers of the purge and drainage system for unit No. 1 (before modernization, after modernization in 2020) and unit No. 2 of Novovoronezh NPP-2 is presented.

These improvements made it possible to achieve a more efficient RHE of the purge and drainage system of steam generators and the system as a whole.


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AES-2006 purge steam generator modernization regenerative heat exchanger strapping re-routing RU V-392M operation

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