Impulse graphite reactor

A research program for re-criticality-free core with existent reactor was fixed and tested in an impulse graphite reactor (IGR), in the collaboration between Kazakhstan NNC (National Nuclear Center) and Japan Atomic Energy Agency. It succeeded to obtain positive experimental results (Inagaki et al. 1998 Niwa et al. 2005,2007 Fuji-ie 1992, 2006) (seeO Fig. 58.11). 

An impulse graphite reactor IGR (O Fig. 59.10) with a central channel to test fuel assemblies at the NPP transient operation modes and a research reactor IVG-1 (O Fig. 59.11) to test full-scale fuel assemblies (FA) of nuclear rocket engines of 3 x 10 -4 x 10 N and higher thrust were built at the Semipalatinsk nuclear test site. Further, an experimental NPP model of a low thrust was mounted at the same site. 

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