HERMITE: a multi-dimensional space-time kinetics code for PWR transients

Technical Report · Mon Mar 01 04:00:00 EST 1976

OSTI ID:7277302

Rohan, P E; Wagner, S G; Ritterbusch, S E

The HERMITE space-time kinetics computer code is described. This code was developed for the analysis of design and off-design transients in large PWR's by means of a numerical solution to the multi-dimensional, few-group, time-dependent neutron diffusion equation including feedback effects of fuel temperature, coolant temperature, coolant density and control rod motion. The time-dependent neutron diffusion equation is solved by a finite element method. The heat conduction equation in the pellet, gap and clad is solved by a finite difference method. Continuity and energy conservation equations are solved for the coolant enthalpy and density. Extensive verification calculations have been performed and are summarized. HERMITE was applied to the three-dimensional analysis of the control element assembly ejection incident, and results were compared to the corresponding two-dimensional analysis. An input description is included as an appendix.

• Research Organization: Combustion Engineering, Inc., Windsor, CT (USA)
• OSTI ID: 7277302
• Report Number(s): CENPD-188
• Country of Publication: United States
• Language: English

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ACCIDENTS
COMPUTER CALCULATIONS
COMPUTER CODES
H CODES
KINETICS
NEUTRON DIFFUSION EQUATION
NUMERICAL SOLUTION
PWR TYPE REACTORS
REACTOR ACCIDENTS
REACTOR KINETICS
REACTORS
ROD EJECTION ACCIDENTS
THREE-DIMENSIONAL CALCULATIONS
TIME DEPENDENCE
TRANSIENTS
WATER COOLED REACTORS
WATER MODERATED REACTORS