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Conference Article: The state of the graphite stack at Leningrad NPP, unit 2, after 16.5 years of operation

Baldin, V.D.; Rodtchenkov, B.S. (Research and Development Inst. of Power Engineering (RDIPE), Moscow (Russian Federation)); Platonov, P.A.; Chugunov, O.K. (Russian Research Centre, Kurchatov Inst. Moscow (Russian Federation))

Abstract

In 1992/93 the personnel of Leningrad NPP carried out restoration of the diametral gas gap (GG) between fuel channels and graphite bricks of the second reactor. Simultaneously, extensive inspection of the graphite stack was realized. It included measuring of hole diameters in graphite bricks, measuring graphite columns' height and curvature and visual inspection of the internal surface. The results of this inspection allowed defining more correctly the dependence of dimensional changes in graphite bricks upon neutron irradiation and confirmed that the state of graphite was good enough for further operation during the design service lifetime.

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key words: Gas Cooled Reactor, Nuclear Technology
Reference:
Specialists meeting on graphite moderator lifecycle behaviour. Bath (United Kingdom). 24-27 Sep 1995.
International Atomic Energy Agency, Vienna (Austria)
IAEA-TECDOC--901, pp:161-165