Mixing of sodium flows above the core of fast reactors
- and others
The subject of this paper involves monitoring the temperature of the heat transfer agent above the core and fluctuations in the temperature of the sodium, affecting the strength of the constructions under steady-state reactor operating conditions. Sources of temperature differences may be local superheating with deformations of the fuel element lattices, blocking of parts of the cross sections of the fuel assemblies, and other such factors. Some information about this is presented. The experimental assembly consisted of seven models of fuel assemblies. Nineteen fuel element simulators separated by wire coils were mounted in each model. Electrical heating of the simulators was provided only in the central model. The thermocouple probe consisted of 30 chromel-alumel thermocouples in stainless-steel capillaries of diameter 0.8 mm. The probe could be placed along the height from the middle of the caps (h=0) to 200 mm. The placement of the thermocouples is shown. There were also thermocouples in the caps of the fuel assemblies in the cross section of the lower edges of their windows, at the outlet from the model and at the inlet to the {open_quotes}cold{close_quotes} fuel assemblies.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 223634
- Journal Information:
- Atomic Energy (New York), Journal Name: Atomic Energy (New York) Journal Issue: 6 Vol. 78; ISSN AENYEZ; ISSN 1063-4258
- Country of Publication:
- United States
- Language:
- English
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