Definition of Neutron Lifespan and Neutron Lifetime in MCNP4B
Conference
·
OSTI ID:471370
- Univ. of New Mexico, Albuquerque, NM (United States)
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
MCNP4B was released in early 1997. In this new version, several major changes were made to the underlying theory used to estimate the non-adjoint-weighted removal, fission, capture, and escape prompt-neutron lifetimes. These four lifetimes are now being calculated in accordance to the neutron-balance theory described by Spriggs et al. in which the non-adjoint-weighted lifetime for a particular type of reaction (i.e., fission, capture, escape, removal, etc.) is defined as the total neutron population in the system divided by that reaction rate.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 471370
- Report Number(s):
- LA-UR--97-222; CONF-970607--14; ON: DE97004755
- Country of Publication:
- United States
- Language:
- English
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