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U.S. Department of Energy
Office of Scientific and Technical Information

REACTOR KINETICS

Technical Report ·
OSTI ID:4829659
The inhour equation was derived using the bare core approximation and few group diffusion theory. The method can be used for any reasonable number of groups. Simple analytical expressions for the prompt neutron lifetime are given for two, three, four, or more neutron groups. Different constants were used for the prompt fast and delayed neutron energy groups. The effective delayed neutron fraction is shown to be numerically equal to the delayed multiplication constant'' times the delayed neutron fraction. The expressions are suited to hand calculation for the interpietation of critical experiments or the analysis of reactor transients for safeguard studies. (auth)
Research Organization:
Combustion Engineering, Inc. Naval Reactors Div., Windsor, Conn.
NSA Number:
NSA-16-019907
OSTI ID:
4829659
Report Number(s):
CENRD-163
Country of Publication:
United States
Language:
English