Status of pelletised moderator neutronics research for the spallation neutron source Long Wavelength Target Station

E. B. Iverson, D. C. Forsythe, B. J. Heuser, J. M. Carpenter

Research output: Contribution to journalArticlepeer-review

Abstract

We explore methods for making detailed calculations on the neutronic performance of a pelletised moderator, wherein a significant fraction of the moderating medium is heterogeneously distributed. This pellet approach appears to be necessary to provide cooling capabilities to a solid moderator material under heavy heat loads, and furthermore appears to offer the only realistic mechanism for permitting solid moderators in situations where the moderator material stores energy from radiation damage at a significant rate. Current use of solid moderators (e.g. methane at the Intense Pulsed Neutron Source facility) is significantly limited by the need to avoid catastrophic release of this stored energy.

Original languageEnglish (US)
Pages (from-to)107-112
Number of pages6
JournalJournal of Neutron Research
Volume11
Issue number1-2
DOIs
StatePublished - Jan 1 2003

Keywords

  • Burping
  • Neutron moderation
  • Pellet moderator
  • Pulsed moderator design
  • Spallation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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