last update April 12, 1998

  1. The effective multiplication factor, keff, can be expressed as the ratio of neutrons in successive prompt neutron lifetime intervals.
    True False

  2. Delta-k defines the reactor's nuclear status in terms of its "deviation from criticality".
    True False

  3. The time required for reactor power to change by a factor-of-ten is called the reactor period.
    True False

  4. The time required following precursor decay for a delayed neutron to slow down to thermal energy and cause fission is called the neutron generation time.
    True False

  5. The two conditions required for a reactor to be supercritical are: keff must be greater than 1.0 and power must be increasing with time.
    True False

  6. Source multiplication is a unique process that occurs only when the reactor is subcritical.
    True False

  7. The fraction of the neutron population that consists of delayed neutrons is represented by the Greek letter beta.
    True False

  8. The weakest neutron source in the core is always the non-fission source.
    True False

  9. Prompt jump is used to describe reactor rate behavior during a step change in reactivity.
    True False

  10. The rule-of-thumb value for the single precursor group effective decay constant (lambda- effective) at criticality is zero.
    True False

The US Nuclear Regulatory Commission (USNRC) requires 80% correct for passing a License exam. Oh yes, all statements are false except for number two. An expert analysis of this quiz is given under EXPLANATION #1. Revisit us for the thrill of the next exciting quiz. Return to homepage.

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