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High-Speed Passive Shut-Off Device for Shut-Off of Feed-Water Flow in a Brest-Type Reactor Facility in Accidents with Solidification of the Lead Coolant

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Abstract

A technical description and calculation justification for the use of a fast-acting passive device for shutting off the feed-water flow in the second circuit of a lead-cooled reactor facility of the BREST-OD-300 type are presented. The main purpose of the device is an emergency termination of heat removal in steam generators in case of accidents with the formation of a solid phase in the lead coolant. The device is a glandless through valve, the locking element of which moves from the operating position to the emergency position under the action of gravity when the feed-water pressure drops below the set value corresponding to the beginning of the solidification of the lead coolant. It is installed on the section of the feed-water pipeline at the inlet to the steam generators. The method for calculating the thermal-hydraulic and dynamic characteristics of the device is presented. Calculation estimates of its efficiency are carried out using the example of accidents caused by a rupture of the main steam header as well as a failure of the regenerative feed-water heating system in a BREST-OD-300 reactor plant. It is shown that the use of a passive shut-off device makes it possible to completely eliminate the possibility of the formation of a solid phase of lead in steam generators during these accidents and increase the level of natural self-protection of the reactor. The results of the study can be used in the development of projects for reactors with heavy liquid metal coolants.

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Funding

This study was financially supported by the Russian Foundation for Basic Research (project no. 19-08-01092a).

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Authors and Affiliations

  1. Research Institute of Mechanics, UNN, 603022, Nizhny Novgorod, Russia

    A. S. Chistov & V. F. Ovchinnikov

  2. Institute of Information Technologies, Mathematics and Mechanics, UNN, 603022, Nizhny Novgorod, Russia

    O. G. Savikhin

Authors
  1. A. S. Chistov
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  2. O. G. Savikhin
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  3. V. F. Ovchinnikov
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Correspondence to A. S. Chistov.

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Chistov, A.S., Savikhin, O.G. & Ovchinnikov, V.F. High-Speed Passive Shut-Off Device for Shut-Off of Feed-Water Flow in a Brest-Type Reactor Facility in Accidents with Solidification of the Lead Coolant. Therm. Eng. 69, 450–456 (2022). https://doi.org/10.1134/S0040601522060015

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  • DOI: https://doi.org/10.1134/S0040601522060015

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