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Unformatted text preview: and the radial displacement o f the outer surface o f the fuel has increased by 35 run. Consider two cases: - An up-power ramp from zero t o f u l l power i n 30 minutes; - An up-power r i i p from zero t o f u l l power i n 30 hours. 4. Calculational Basis - Use a single r i n g to represent the clad - Consider that the radial deflection a t the fuel outer surface and the clad average temperature vary l i n e a r l y with time during each up-power ramp. - Use only elastic, thermal, and creep strains. Let the creep strains equal zero a t hot zero power. - Use zero axial force from fuel-clad contact. 5. Questions Obtain the following quantities upon reaching f u l l power i n each up- power ramp: . , - clad stress; - clad strain; and - r a d i a l displacement a t the clad outer surface....
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- Fall '06
- Stress, ra ial deflec, ithe afrul ye