Author: Gordon G. BentlePublisher:
ISBN:
Category : Nuclear fuel elements
Languages : en
Pages : 76
Book Description
Irradiation Swelling of Uranium and Uranium Alloys
Author: Gordon G. BentlePublisher:
ISBN:
Category : Nuclear fuel elements
Languages : en
Pages : 76
Book Description
A Metallographic Study of the Swelling of Uranium and Uranium Alloys
Author: A. BoltaxSwelling in Uranium
Author: T. K. BierleinPublisher:
ISBN:
Category : Annealing of metals
Languages : en
Pages : 40
Book Description
SWELLING OF URANIUM. Report
Author: SWELLING OF URANIUM (Second Year of Study).
Author: Swelling of Uranium and Uranium Alloys on Postirradiation Annealing
Author: B. A. LoomisPublisher:
ISBN:
Category : Fuel burnup (Nuclear engineering).
Languages : en
Pages : 46
Book Description
The swelling of uranium and of a few selected uranium alloys on post-irradiation annealing was investigated by utilizing density measurements in conjunction with the observation of pores in the microstructures of annealed specimens. Specimens were irradiated to about 0.3 at.% burnup in a constrained condition at approximately 275 deg C and were subsequently pulse annealed. The amount of swelling was found to be less than 1% for U specimens that were pulse annealed up to 75 hr at temperatures below 550 deg C; the amount of swelling, however, increased considerably on annealing at temperatures between 550 and 650 deg C. Specimens pulse annealed up to 75 hr at 618 deg C decreased in density by approximately 18%. The swelling was accompanied by the formation of bubbles on grain boundaries in recrystallized regions. The observations suggest that recrystallization is a necessary prerequisite for pronounced swelling in the alpha phase.
Uranium Swelling in N-Reactor (PT-NR-4, Sup. A, Report No. 1).
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 15
Book Description
Five monitor columns, containing some pre-irradiation weighed inner and outer fuel elements, were discharged under authorization of PT-NR-4, Sup A at tube average exposures in the range from 1554 to 1631 MWD/T. Uranium swelling values have been calculated from post-irradiation weight measurements and these swelling values have been compared with those swelling values obtained in the KER loop tests. There is acceptable agreement between KER and NPR results for swelling of inner uranium; there is acceptable agreement for outer fuel elements at higher exposures but ends-of-the-column elements (i.e. low-exposure values) are not in agreement. The current swelling values have been extrapolated to determine the tube-average exposure that will result in outer clad strains of one percent. At this conservative value of clad strain, one can predict entirely adequate performance of outer fuel elements to tube average exposures of 2200 MWD/T and inner fuel elements to 2700 MWD/T tube average exposure. Elements that will soon be discharged at tube average exposures ranging from 1900 to 2100 MWD/T, can be evaluated for swelling during the next outage and a much better prediction can be made on the relation of exposure vs swelling and hence exposure vs fuel element integrity. The continuing objective of this production test remains as the determination of fuel element performance vs exposure.
Calculation of Radiation Induced Swelling of Uranium Mononitride Using the Digital Computer Program CYGRO 2
Author: Metallographic Observations of Swelling in Uranium
Author: T. K. BierleinPublisher:
ISBN:
Category : Fission gases
Languages : en
Pages : 128
Book Description
Author: S. Amelinckx