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Measurement of the Equivalent Fundamental-Mode Source Strength

Conference ·
OSTI ID:471395
 [1];  [2];  [3];  [3]
  1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  2. University of New Mexico, Albuquerque, NM (United States)
  3. Japan Atomic Energy Research Institute (JAERI), Ibaraki-ken (Japan)
+ Show Author Affiliations
The steady-state multiplication, M, of a subcritical system that is in equilibrium with an external/intrinsic source is defined as the total neutron-production rate divided by the external/ intrinsic neutron source rate, S. The total neutron-production rate, in this context, is the sum of the fission-production rate plus the source rate. Because the system is in equilibrium, the total neutron-production rate is identically equal to the loss rate from the system due to absorption plus leakage. If the source S is distributed identically to the fission source distribution (i.e., angle, energy, and space), then M will be related to the effective multiplication factor of the system, keff, as M = 1/1-keff.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); University of New Mexico, Albuquerque, NM (United States); Japan Atomic Energy Research Institute (JAERI), Ibaraki-ken (Japan)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
DOE Contract Number:
W-7405-ENG-36
OSTI ID:
471395
Report Number(s):
LA-UR--97-259; CONF-970607--15; ON: DE97004787
Country of Publication:
United States
Language:
English

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Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
FISSION
MEASURING METHODS
MULTIPLICATION FACTORS
NEUTRON SOURCES
Nuclear Criticality Safety Program (NCSP)
REACTOR PHYSICS
URANIUM 238