Bulakh Olga Igorevna PhD Student Engineering School of Nuclear Technology «National Research Tomsk Polytechnic University» o.i.kataeva@gmail.comExtension 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.