Kostylev Oleg Konstantinovich Master of Science Engineering School of Nuclear Technology «National Research Tomsk Polytechnic University» okk2@tpu.ruExtension of lifespan of graphite in fuel blocks of high-temperature gas-cooled reactors as the resource for ensuring design values of nuclear fuel burn-up 9/30/2019 2019 - #03 Physics and technology of nuclear reactors Bulakh O.I. Kostylev О.К. Nesterov V.N. Cherdizov E.K.