2006/02/01 by Robin Klein Meulekamp, R. Klein Meulekamp, Steven C. van der Marck +1 · 2 citations
Engineering · Physics and Astronomy · #Nuclear Physics and Applications #Nuclear reactor physics and engineering #Radiation Detection and Scintillator Technologies
paper · doi:10.13182/nse03-107
crossref issued 2006/02/01 · crossref published 2006/02/01 · crossref published-print 2006/02/01 · openalex publication_date 2006/02/01 · crossref created 2014/07/14 · crossref published-online 2017/04/10 · crossref deposited 2019/08/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01 · crossref indexed 2026/08/01
New Monte Carlo estimators of the effective delayed neutron fraction βeff are presented in this paper. By looking at the physical interpretation of the adjoint function, one can incorporate its effect on the delayed neutron fraction without explicitly calculating the adjoint function itself. We have implemented these estimators into MCNP. In a standard keff calculation, the code now reports a βeff value. The method does not slow down the code by more than 0.5%. We propose an extensive experimental benchmark set for βeff, which we use to test our method and two known approximate methods. Our method reproduces all experimental values.