Calculating streaming with the “tally source” method, as applied to IFMIF

Frej Wasastjerna (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)


Shielding calculations for a thick shield with lots of penetrations can be a very challenging task. An example of this is the test cell cover of IFMIF, consisting of 270 cm of heavy concrete penetrated by about 40 ducts with a diameter of several centimeters, each of them with bends to limit neutron streaming. A proposal by Hendricks to tally the neutron current at intermediate surfaces and then model it as a source, with appropriate angular biasing, is described and tested. Although this method is laborious and leads to some loss of accuracy, it is found to give solutions to otherwise intractable problems.
Original languageEnglish
Pages (from-to)438-445
JournalAnnals of Nuclear Energy
Issue number3
Publication statusPublished - 2008
MoE publication typeA1 Journal article-refereed


  • fusion energy
  • fusion reactors
  • radiation
  • radiation doses
  • fast neutrons
  • neutron flux
  • neutron irradiation
  • neutrons


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