Development and implementation of compensating activities for providing the seismic resistance of equipment and pipelines of systems important for safety

V. O. Kurov, V. O. Posokh, T. V. Pirogov

State Enterprise “State Scientific Engineering Center of Control System and Emergency Response”, 64/56, Geroiv Statingrada ave, Kyiv, 04213, Ukraine



One of the requirements for extending operation during the over-design period of NPP power units is to perform seismic resistance assessment (qualification for seismic effects) of equipment and pipelines of systems important to safety. According to the results of such work at power unit 1 of the Khmelnitsky Nuclear Power Plant for a number of equipment and pipelines, it is necessary to perform compensating activities aimed to increase seismic resistance. To implement compensating activities, it is necessary to develop technical solutions based on the design and estimate documentation.

The design and estimate documentation is developed in accordance with the current norms of Ukraine and consists of working drawings, estimate documentation (local estimate, statement of production costs) and an explanatory note describing the implementation of the technical solution.

Working drawings are performed for the selected options for the technical solution of compensating activities. For example, if to increase seismic resistance, it is necessary to install an additional support structure for the pipeline or equipment, the working drawings should contain a detailed description of the new additional support.

The main technical solutions for increasing the seismic resistance of equipment and pipelines are: development of an additional supporting metal pipeline; development of additional steel support for pipeline valves; mutual fastening of interacting elements; elimination of construction with interact of the equipment. The justification of technical solutions is performed by calculation analysis using modern software codes.

The article presents two examples of technical solutions: the development of additional support for the pipeline pressure compensation systems; mutual detachment of pipelines in order to avoid interaction of reinforcement with pipeline.

Keywords: nuclear power plant, compensating activities, design estimates documentation, seismic resistance, maximum calculated earthquake, technical solution.


1. Resolution of the Board of State Nuclear Regulatory Committee of the Ukraine “On the Results of the Implementation of the Target Extraordinary Assessment of the Safety Status of Operating NPP Units Taking into Account Fukushima-Daiichi” of November 24-25, 2011. Available at: article/169634. (in Russ.)

2. NP 306.2.208-2016. Requirements for Seismic Resistance Design and Evaluation of Seismic Safety of Ukrainian NPPs. Official Bulletin of Ukraine, 2016, no. 92, art. 59. (in Ukr.)

3. Generic Implementation Procedure (GIP) for Seismic Verification of Nuclear Power Plant Equipment. Revision 2A / SQUG [Seismic Qualification Utility Group], 1992,31 p.

4. DITI 300/376-RU/R.2. Methodology for assessing the seismic resistance of equipment for qualification for seismic effects. UJV Rez, 2009, 90 p. (in Russ.)

5. Gosatomonenergonadzor of the USSR (1989). PNAE G-7-002-86. Standards for strength calculation of equipment and pipelines of nuclear power plants [introduced with changes of 07/01/1987]. Moscow: Energoatomizdat, 525 p. (in Russ.)

6. MinRegion of Ukraine (2014). DBN V.2.6-198: 2014. Steel structures. Design Standards. Kyiv: Ukrrahbudinform, 199 p. (in Ukr.)

7. SE “NNEGC “Energoatom” (2013). MT-T.0.03.326-13. The method of calculation analysis of the seismic resistance of elements of operating NPPs in the framework of the boundary seismic resistance method. Kyiv, 51 p. (in Russ.)

8. DBN A.2.2-3:2014. Composition, procedure for development, approval and approval of project documentation for construction. Kyiv, Minregion of Ukraine, 2014, 33 p. (in Ukr.)

9. DSTU B A.2.4-4:2009. Basic requirements for design and working documentation. Kyiv: Minregion of Ukraine, 2009, 66 p. (in Ukr.)

10. DSTU B D.l.1-1:2013. Rules for determining the cost of construction. Kyiv, Minregion of Ukraine, 2013, 88 p. (in Ukr.)

11. DBN B.1.1-12:2014. Construction in seismic areas of Ukraine. Kyiv, Minregion of Ukraine, 2014,110 p. (in Ukr.)

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