Messungen und Berechnungen zur Sr-90-Freisetzung aus HTR-Brennstoffelementen
Messungen und Berechnungen zur Sr-90-Freisetzung aus HTR-Brennstoffelementen
Coated fuel particles were investigated in post irradiation experiments. Sr-90-fractional releases from single particles were measured during isothermal anneals. The time-dependent fractional release curves were analyzed with the aid of simple diffusion theory and delivered temperature dependent dif...
Saved in:
Personal Name(s): | Amian, W. |
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Helmbold, M. / Stöver, S. / Wolke, K. / Hecker, R. | |
Contributing Institute: |
Publikationen vor 2000; PRE-2000; Retrocat |
Imprint: |
Jülich
Kernforschungsanlage Jülich Zentralbibliothek, Verlag
1979
|
Physical Description: |
50 p. |
Document Type: |
Report Book |
Research Program: |
ohne Topic |
Series Title: |
Berichte der Kernforschungsanlage Jülich
1580 |
Link: |
OpenAccess |
Publikationsportal JuSER |
Coated fuel particles were investigated in post irradiation experiments. Sr-90-fractional releases from single particles were measured during isothermal anneals. The time-dependent fractional release curves were analyzed with the aid of simple diffusion theory and delivered temperature dependent diffusion constants. For oxide kernel material with burn-up values up to 30% fima it resulted: D$_{Sr-90}$ =3,5 $\cdot$ 10$^{-5}$ $\frac{m ^{2}}{sec} $ e - $\frac{409 000(Joule/mol)} {RT}$ Additionally some measurements were done on kernels with additives and TRISO coated particles. Moreover these data and other data from literature were used in a parametric study to determine the data's influence upon Sr-90 Core releases of 3000 MW$_{th}$-plants. The results show, that all calculated forecasts remain sufficiently low as for oxide fuel, but increase to evidently higher release values as for carbide kernel materials. |