Intermediate-Scale Homogeneous

During the period of construction and operation of HRE-1, conceptual design studies were completed for a boiling reactor experiment (BRE) operating at 150 kw of heat and a 58-Mw (heat) intermediate-scale homogeneous reactor (ISHR). Further work on these reactors was deferred late in 1953, however, when it became evident from HRE-1 and the associated development program that construction of a second homogeneous reactor experiment would be a more suitable course of action. 

Oak Ridge National Laboratory two-region reactor studies. Intermediate-scale homogeneous reactor. In October 1952 de.sign studies were... 

The principal system parameters on which the design of the two-region intermediate-scale homogeneous reactor is based are presented in Table 9-8. 

Design Parameters of a Tavo-Region Intermediate Scale Homogeneous Reactor... 

Fig. 6.39. Images of dislocation nucleation in a bubble raft model of a single crystal subjected to surface indentation. In the case of the smallest surface roughness (a), dislocation nucleation occurs at the peaks of the asperities where they contact the indenter. At the intermediate scale (b), dislocation nucleation occurs at the reentrant corners at the bases of the asparities. Finally, for the largest scale asperity (c), the stress level near the stress concentrations has been reduced geometrically, and dislocations nucleated homogeneously at an interior point where the shear stress is the largest. Each bubble in this raft is 1 mm in diameter and it represents an atom which is approximately 0.3 nm in diameter. Reproduced with permission from Gouldstone et al. (2001).

Due to existence of an isothermal region, temperature of both entrance and outlet was rather lower than that of intermediate section. Where temperature was high, the reaction was sever and fast. So, at site 200-300 mm away from entrance, the temperature was highest, the scale layer was thickest and the whisker column was longest there. The reaction route in this zone could be described as phase reaction homogeneous nucleation — coagulation. When... 

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