Radial core expansion reactivity feedback in advanced LMRs: uncertainties and their effects on inherent safety
Conference
·
OSTI ID:7011587
An analytical model for calculating radial core expansion, based on the thermal and elastic bowing of a single subassembly at the core periphery, is used to quantify the effect of uncertainties on this reactivity feedback mechanism. This model has been verified and validated with experimental and numerical results. The impact of these uncertainties on the safety margins in unprotected transients is investigated with SASSYS/SAS4A, which includes this model for calculating the reactivity feedback from radial core expansion. The magnitudes of these uncertainties are not sufficient to preclude the use of radial core expansion reactivity feedback in transient analysis.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 7011587
- Report Number(s):
- CONF-8804155-1; ON: DE88011944
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210400* -- Power Reactors
Nonbreeding
Otherwise Moderated or Unmoderated
CALCULATION METHODS
DATA
EXPANSION
EXPERIMENTAL DATA
FEEDBACK
INFORMATION
LIQUID METAL COOLED REACTORS
MATHEMATICAL MODELS
NUMERICAL DATA
REACTOR COMPONENTS
REACTOR CORES
REACTORS
210400* -- Power Reactors
Nonbreeding
Otherwise Moderated or Unmoderated
CALCULATION METHODS
DATA
EXPANSION
EXPERIMENTAL DATA
FEEDBACK
INFORMATION
LIQUID METAL COOLED REACTORS
MATHEMATICAL MODELS
NUMERICAL DATA
REACTOR COMPONENTS
REACTOR CORES
REACTORS