[en] Suggested is a method for evaluation of a stressed state of evaporation tubes of once-through steam generators at temperature oscillations in the burnout region. Calculated is the amplitude of steam-generating surface temperature oscillations in the burnout region depending on the frequency of a liquid-steam boundary transfer and on this basis determined are thermal stresses in a tube wall. Knowing a fatigue curve gives the possibility to evaluate a heat transfer tube lifetime
Original Title
Ob otsenke resursa isparitel'nykh trub pryamotochnykh parogeneratorov pri kolebaniyakh temperatury parogeneriruyushchej poverkhnosti v zone krizisa teplootdachi