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Welcome to the IAEA beta-Delayed Neutron Emission network- bDN

Delayed neutron data are essential for reactor kinetics and safety where excessively large uncertainties in the data used in reactor calculations can lead to costly conservatism in the design and operation of reactor control systems. They are also necessary for applications involving non-invasive monitoring of nuclear reactors and for nuclear sciences in general. Since the last compilation of beta-delayed neutron data was published in 2002, progress has been made in the production/identification of delayed neutron precursors, and a wealth of data has been published which however, is not yet included in any database. bDN is a coordinated effort to create a Reference Database for beta-delayed neutron emission.

For further information or questions please contact​​

.  Proceedings of the Specialist’s Meeting on Delayed Neutron Nuclear Data New tab
Compilation and Evaluation of Fission Yield Nuclear Data tab
Fission Product Yield Data for the Transmutation of Minor Actinide Nuclear Waste tab


 Current Highlights

3rd RCM of the bDN CRP, 12-16 June 2017, IAEA                                                           Report is available

22nd Technical Meeting of the International Network of Nuclear Structure and Decay Data Evaluators, 22-26 May 2017, Lawrence Berkeley National  Laboratory, California                                                            Report is available 

TM on Fission Product Yields: Current status and perspectives, 23-26 May 2016, IAEA  Report is available


Consultant's Meeting on Benchmarking of new evaluated beta-delayed neutron data,          13-15 December 2017, IAEA