ANALYTICAL AND EXPERIMENTAL STUDIES OF THE TEMPERATURE STRUCTURE WITHIN THE ART CORE
ABS>The temperature structure within the core of the ART was studied for several different entrance flow conditions. Both analytical and experimental techniques of analysis are used in the investigation. Mean and transient temperature fields are predicted on the basis of the mathematical behavior of idealized cores. These results are compared with experimental temperature measurements obtained in a half-scale model of the ART core, within which the volume heat sources are generated electrically. The heat transfer studies revealed the following facts about the ART core: (1) Unless the core shell walls are cooled, maximum wall temperatures ranging from 1750 to 1850 deg F (depending upon the type of entrance flow) will exist near the core exit and necessitate removal of approximately 1% of the heat generated witin the core to accomplish the cooling task. (2) Unless the sodium coolant flows through the cooling annuli in a uniform fashion, hot and cold spots will exist in the core shells. (3) Peak fuel temperatures at the core exit, under wall cooling conditions, will be from 100 to 170 deg F higher than the mixed-mean fuel temperature (depending upon the type of entrance flow). (4) The temperatare structure within the core is significantly asymmetric with respect to peripheral position when one pump is not in operation. (5) The core shell interface and fuel temperatures are transient in nature (frequency spectrum ranges from about 1/2 to 4 cycles per second). Some of the general principles upon which circulating-fuel reactors should be designed from the standpoint of heat transfer and fluid flow are discussed. Several reactor cor es other than the ART are reviewed. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- DOE Contract Number:
- W-7405-ENG-26
- NSA Number:
- NSA-14-009207
- OSTI ID:
- 4196526
- Report Number(s):
- ORNL-2198
- Country of Publication:
- United States
- Language:
- English
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