Relationship of core exit-temperature noise to thermal-hydraulic conditions in PWRs
Core exit thermocouple temperature noise and neutron detector noise measurements were performed at the Loss of Fluid Test Facility (LOFT) reactor and a Westinghouse, 1148 MW(e) PWR to relate temperature noise to core thermal-hydraulic conditions. The noise analysis results show that the RMS of the temperature noise increases linearly with increasing core ..delta..T at LOFT and the commercial PWR. Out-of-core test loop temperature noise has shown similar behavior. The phase angle between core exit temperature noise and in-core or ex-core neutron noise is directly related to the core coolant flow velocity. However, if the thermocouple response time is slow, compared to the coolant transit time between the sensors, velocities inferred from the phase angle are lower than measured coolant flow velocities.
- Research Organization:
- Oak Ridge National Lab., TN (USA); Tennessee Univ., Knoxville (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6636104
- Report Number(s):
- CONF-830103-39; ON: DE83006144
- Resource Relation:
- Conference: 2. international topical meeting on nuclear reactor thermal hydraulics, Santa Barbara, CA, USA, 11 Jan 1983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PWR TYPE REACTORS
REACTOR INSTRUMENTATION
THERMOCOUPLES
PERFORMANCE TESTING
FLOW RATE
HYDRAULICS
REACTOR INTERNALS
REACTOR NOISE
TEMPERATURE MONITORING
FLUID MECHANICS
MEASURING INSTRUMENTS
MECHANICS
MONITORING
REACTOR COMPONENTS
REACTORS
TESTING
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled