Probabilistic analysis of safety: Increasing the reliability and safety of nuclear power plant components - Probabilistic Safety Assessment for Optimum Nuclear Power Plant Life Management (PLiM) - page 215

Operating time, year
6.12 Variation of the probability of fracture of the main circulation
pipeline of a VVER-440 reactor in relation to the measures taken:
1) initial reliability; 2) effect on the initial reliability of specially
organised hydraulic test; 3) effect on initial reliability of special
non-destructive inspection; 4) effect on initial reliability of non-
destructive inspection and hydraulic test.
accident on these power units is completely prevented at this level.
The studies were used to reduce greatly the expenditure on the
reconstruction of the power units 3, 4 of the Novovoronezh' NPP and units
1, 2 of the Kola NPP.
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