Nodal analysis for reactor kinetics and stability. [PWR; BWR]

Technical Report · Fri Jul 01 00:00:00 EDT 1983

DOI:https://doi.org/10.2172/5969026· OSTI ID:5969026

Park, J. K.; Becker, M.; Park, G. C.

General space kinetics models have been developed for more accurate stability analysis utilizing nodal analysis, a commonly used technique for analyzing power distributions in large power reactors. Kinetics parameters for use in these kinetics models have been properly derived by utilizing self-consistent nodal data and power distributions. The procedure employed in the nodal code SIMULATE has been utilized for power distribution, since that methodology is general and includes various commonly used nodal methods as special cases. Cross sections are correlated as functions of void fraction and exposure. A computer program investigating thermo-hydrodynamic stability, NUFREQ has been modified to accommodate general spatial kinetics models with an improved thermal-hydraulics model. Stability analyses have been performed for density wave oscillations for a representative operating BWR system. Spatial coupling effects on the stability margins were found to be significant.

• Research Organization: Rensselaer Polytechnic Inst., Troy, NY (USA). Dept. of Nuclear Engineering
• OSTI ID: 5969026
• Report Number(s): NUREG/CR-3377; ON: DE83902653
• Country of Publication: United States
• Language: English

Related Subjects

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BWR TYPE REACTORS
REACTOR KINETICS
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COMPUTER CALCULATIONS
HEAT TRANSFER
HYDRAULICS
MATHEMATICAL MODELS
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