Methods and Errors in Subcriticality Measurements by Rod Drop Flux Profile Analysis
- Argonne National Lab. (ANL), Argonne, IL (United States)
The degree of subcriticality of a multiplying assembly having a spontaneous fission-neutron source may be inferred by inducing an additional change in multiplication and by following the flux profile through the course of this change to its final stationary state. It is important to assess the significance of noise effects insofar as they bias the estimate of initial subcriticality and as they place confidence limits on this estimate. A procedure is described for profile analysis which includes the effects of all noise sources. The procedure is more nearly equivalent to the traditional prompt-jump three-point analysis than to the more general inverse kinetics analysis. A code for extracting initial subcriticality and errors from a flux profile subject to an arbitrary noise level is provided.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 7177012
- Report Number(s):
- ANL-7966
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
220100* -- Nuclear Reactor Technology-- Theory & Calculation
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ERRORS
Finite Transit
KINETICS
Kinetics
MEASURING METHODS
MOCKUP
NEUTRON FLUX
Nuclear Criticality Safety Program (NCSP)
RADIATION FLUX
REACTOR COMPONENTS
REACTOR CORES
REACTOR KINETICS
ROD DROP METHOD
STRUCTURAL MODELS
SUBCRITICALITY
Statistics
Three-Point Method
220100* -- Nuclear Reactor Technology-- Theory & Calculation
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ERRORS
Finite Transit
KINETICS
Kinetics
MEASURING METHODS
MOCKUP
NEUTRON FLUX
Nuclear Criticality Safety Program (NCSP)
RADIATION FLUX
REACTOR COMPONENTS
REACTOR CORES
REACTOR KINETICS
ROD DROP METHOD
STRUCTURAL MODELS
SUBCRITICALITY
Statistics
Three-Point Method