Process for production of fuel bodies, fuel elements, and absorber elements for high temperature reactors
Fuel bodies, fuel elements and absorber elements for high temperature reactors are produced by isostatic pressing of a mixture of binder containing a graphite powder and encased coated fuel particles and/or absorber particles at high compression ratios wherein the pressing process is carried out in a plurality of pressing steps with stepwise increasing compression so that in each pressing step a fixed compression takes place which is so selected that there is not required a specific vacuum step or deaeration step in the powdery condition and the air compressed in the pressing process can escape from the porous pressed article without injuring the structure and that a higher pressure is employed from pressing step to pressing step until the final compression and that in a first pressing step there is preformed in a rubber mold with a suitable cavity at low pressure kernels of the pressed article from a homogeneous mixture of encased, coated fuel particles and/or absorber particles and binder containing graphite molding powder and this preformed kernels embedded in a coating of binder containing graphite molding powder in a second pressing step in a second rubber mold with a suitable cavity are prepressed at low pressure, and in a third pressing step this preformed article is finally pressed at high pressure in a further rubber mold having a suitable cavity. (Official Gazette)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-33-022067
- Assignee:
- to Hochtemperaturreaktor- Brennelement GmbH
- Patent Number(s):
- US 3912798
- OSTI ID:
- 4070303
- Country of Publication:
- United States
- Language:
- English
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