Reactivity anomalies in the Fast Flux Test Facility; An evaluation of data from cycles 1 through 8
- Westinghouse Hanford Co., Richland, WA (USA)
Experience using an automated core reactivity monitoring technique at the Fast Flux Test Facility (FFTF) through eight operating cycles is described. This technique relies on comparing predicted-to-measured rod positions to detect any anomalous (or unpredicted) core reactivity changes. Reactivity worth predictions of core state changes (temperature and irradiation changes) and compensating control rod movements are required for the rod position comparison. A substantial data base now exists to evaluate changes in temperature feedback reactivity effects operational in the FFTF, rod worth changes due to core loading, temperature and irradiation effects, and burnup effects associated with transmutation of fuel materials. This work focuses on resolving observed reactivity anomalies by evaluating the prediction models using additional zero-power rod worth measurement data along with calculations of rod worths and burnup rates for each cycle using cross-section data processed from the latest ENDF/B-V data set.
- OSTI ID:
- 6740977
- Journal Information:
- Nuclear Technology; (USA), Journal Name: Nuclear Technology; (USA) Vol. 89:1; ISSN NUTYB; ISSN 0029-5450
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
220400* -- Nuclear Reactor Technology-- Control Systems
220600 -- Nuclear Reactor Technology-- Research
Test & Experimental Reactors
99 GENERAL AND MISCELLANEOUS
990300 -- Information Handling
AUTOMATION
BURNUP
COMPUTERIZED CONTROL SYSTEMS
COMPUTERIZED SIMULATION
CONTROL SYSTEMS
CROSS SECTIONS
DATA PROCESSING
EPITHERMAL REACTORS
EXPERIMENTAL REACTORS
FAST REACTORS
FFTF REACTOR
FUEL ELEMENTS
FUEL RODS
LIQUID METAL COOLED REACTORS
NUCLEAR DATA COLLECTIONS
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
PHYSICAL RADIATION EFFECTS
POSITIONING
POWER PLANTS
PROCESSING
RADIATION EFFECTS
REACTOR COMPONENTS
REACTOR CORES
REACTORS
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
SIMULATION
SODIUM COOLED REACTORS
TEST REACTORS
THERMAL POWER PLANTS
ZERO POWER REACTORS