Quarterly Progress Report on Blowdown Heat Transfer Separate-Effects Program for July-September 1978

Technical Report · Fri Dec 01 00:00:00 EST 1978

DOI:https://doi.org/10.2172/6786380· OSTI ID:6786380

White, J. D. ^[1]; Bagwell, M. E. ^[1]; Bohanan, R. E. ^[1]; Clark, D. L. ^[1]; Cliff, S. B. ^[1]; Combs, S. K. ^[1]; Craddick, W. G. ^[1]; Hagar, R. C. ^[1]; Johnson, A. F. ^[1]; Ott, L. J. ^[1]; Tallackson, J. R. ^[1]

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1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

The Thermal-Hydraulic Test Facility(THTF) has completed 29 powered rod blowdowns: 5 with all 49 rods powered, 2 with 2 inactive rods, and 22 with 4 inactive rods. Blowdown tests 175 and 176 were conducted this period. Tests 175 and 176 were the first and second precursors to the Idaho National Engineering Laboratory (INEL) Independent Verification Test 177, which is planned to be run in the THTF later this year. The purpose of these tests was to determine the capability of the THTF to provide specified bundle surface temperatures and heat fluxes under blowdown conditions similar to those which will occur in test 177. A newly installed power programmer was used to alter the bundle power during the blowdowns. The predicted generator response compared very well with the experimentally measured response; the power programmer functioned as predicted.

• 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: 6786380
• Report Number(s): NUREG/CR--0415; ORNL/NUREG/TM--271
• Country of Publication: United States
• Language: English

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bundle hydraulics
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dynamic response
electrical heater rods
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heater rod sheath thermocouples
instrument error analysis
motor-generator sets
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separate effects loss-of-coolant accident
test 175
test 176
test matrix
thermocouple failures
two-phase flow