PWR Blowdown Heat Transfer Separate-Effects Program Data Evaluation Report—Heat Transfer for THTF Test Series 100
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Heat transfer phenomena are analyzed for test series 100 of the Thermal-Hydraulic Test Facility, part of the Pressurized-Water Reactor Blowdown Heat Transfer Separate-Effects Program. Heater rod surface temperatures are found to be sensitive to relatively small variations in flow. The mechanisms causing departure from nucleate boiling and rewetting are analyzed. Comparisons are made between heater rod surface temperatures calculated from thermocouple responses and surface temperatures produced by the thermal-hydraulic transient simulator RELAP4/MOD5 (update 2). The code's predictions are relatively accurate in the lower region of the test section and considerably high in the upper region. The procedures in the code which produce these results are discussed in detail.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE; USNRC
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6606933
- Report Number(s):
- ORNL/NUREG--45; NUREG/CR-0105
- Country of Publication:
- United States
- Language:
- English
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