WPNCS Expert Group on Source Convergence

Improper source convergence can lead to non-conservative estimates of the k-effective for various fissionable configurations. These include calculations of the k-effective for the "whitesides problem", spent fuel casks, spent fuel storage pools and fuel processing systems. To improve the robustness of criticality safety analyses with respect to source convergence, the NEA has established an expert group to investigate the long-standing problem of source convergence for certain classes of nuclear criticality safety problems.

Under the guidance of the Working Party on Nuclear Criticality Safety, the major assignments of the expert group include:

Fission source convergence bibliographies

Benchmark specifications

Related links

NEA Working Party on Nuclear Criticality Safety

Nuclear Science Committee

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E-mail contact:

Last updated: 9 July 2010