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The concentration of retained xenon, the percentage of porosity and the grain size have been measured as a function of radial position in the base irradiated rod AG11-8 and the transient tested rod AG11-10. The results show that in the base irradiation, densification of the fuel took place, no detectable gas release occurred and that slight grain growth occurred at the pellet centre. During the transient test, 15-20% of the xenon inventory was released from the fuel grains. Gas release was accompanied in the central region of the fuel by an increase in the porosity from 4.7% to 6-8% and an increase in the grain size from 10 to 14 1.0 E-6 m. These findings are compared with predictions made by the fuel performance code TRANSURANUS. The code predictions are in good agreement with the experimental observations.

Additional information

Authors: WALKER C T, JRC Karlsruhe Estab. (DE);LASSMANN K, JRC Karlsruhe Estab. (DE);COQUERELLE M, JRC Karlsruhe Estab. (DE);MOGENSEN M, Riso National Lab., Roskilde (DK)
Bibliographic Reference: Paper presented: IAEA Technical Committee Meeting "Water Reactor Fuel Element Computer Modelling in Steady-State, Transient and Accident Conditions", Preston (GB), Sept. 19-22, 1988
Availability: Available from (1) as Paper EN 34395 ORA
Record Number: 198910175 / Last updated on: 1994-12-01
Original language: en
Available languages: en
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