REDUCED DELAYED NEUTRON GROUP REPRESENTATIONS

Journal Article · Fri May 01 04:00:00 EDT 1959 · Nuclear Sci. and Eng.

OSTI ID:4238696

Skinner, R E; Cohen, E R

It has been shown that a two-delayed neutron group model will accurately represent the asymptotic behavior of the reactor transfer function. Correspondingly, the requirement that this asymptotic behavior be accurately represented is sufficient to specify completely the twodelayed neutron group constants. Funther, a threedelayed neutron group model has been evolved which is designed to represent both the asymptotic behavior of the transfer function and shutdown behavior. The inhour equation, transfer function, and transient behavior for step inputs of reactivity with and without reactivity feedback loops for the two- and three-delayed neutron group representations are compared with those given by the standard one group and many delayed neutron group treatments. Important consequences of such reduced group representations are savings in machine time in making kinetic studies and increased tractability of the reactor kinetic equations. (auth)

• Research Organization: Atomics International Div., North American Aviation, Inc., Canoga Park, Calif.
• NSA Number: NSA-13-015726
• OSTI ID: 4238696
• Journal Information: Nuclear Sci. and Eng., Journal Name: Nuclear Sci. and Eng. Vol. Vol: 5
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COMPUTERS
DELAYED NEUTRONS
ENERGY LEVELS
EQUATIONS
GROUP THEORY
OPERATION
PERFORMANCE
REACTIVITY
REACTORS
SHUTDOWN
TRANSFER FUNCTIONS
TRANSIENTS
VARIATIONS