On the Rolling of Uranium Rods by Grooved Rolls (in Japanese)
Some basic studies on the rolling of uranium rods were carried out as a part of preliminary study for the fabrication of natural uranium fuel rod to be used for JRR-3. Two different sequences of groove were adopted; one was the ordinary "Oval-square," and the other was the "Gothic." Because of the underfilled deformation of uranium in the oval groove at 600 deg C and some operational difficulties, the former sequence seemed to be impractical. On the other hand, the latter sequence was almost satisfactory. The microstructural changes of uranium rod hot rolled at 600 and 500 deg C, respectively, were also investigated. At 600-C, the recrystallized structure was formed with less rolling reduction than at 500-C, but the size of recrystallized grains after final reduction of 81% in area was finer at 500 than at 600 deg C. The effects of increasing reduction on hardness of uranium rod at 300 and 600 deg as well as on the appearance of uranium rod after final reduction of 45% in area at 300 and 600 deg C were compared in the respective cases. The dilatation curves of uranium rods for various rolling temperature and degree of reduction as well as its deformation on thermal cycling between 50 and 550 deg C were discussed.
- Research Organization:
- Japan Atomic Energy Research Inst., Tokyo
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-14-002706
- OSTI ID:
- 4206202
- Journal Information:
- Nippon Genshiryoku Gakkai-Shi, Journal Name: Nippon Genshiryoku Gakkai-Shi Journal Issue: 1 Vol. 1; ISSN 0004-7120
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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