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The calculation of resonance capture in granular fuels

Abstract

The methods used in the UK for the calculation of resonance capture in granular HTR fuels follow the long established path of determining a 'geometric equivalence' which equates the resonance shielding to that in a homogeneous mixture of the resonance absorber in hydrogen. Simple collision probability arguments, usually for the black limit, were used for AGR and SGHW systems. For granular fuel a 'grey' equivalence, convenient for numerical use, has been adopted, and the geometric solution performed in two ways: by a synthetic collision probability model which is rapid and appropriate for design work and by a Monte Carlo model which allows details of the grain lattice structure to be studied. The results are in good agreement, and are shown to give good results compared with measured relative conversion ratios in the NESTOR stack experiments.
Publication Date:
Feb 15, 1971
Product Type:
Technical Report
Report Number:
DCPM-11/Winfrith-1
Resource Relation:
Conference: 11. Dragon Countries Physics Meeting, London (United Kingdom), 11-12 Feb 1971; Other Information: Portions of the full text have limited legibility; copy also includes handwritten notations
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; DRAGON REACTOR; HTGR TYPE REACTORS; EXPERIMENTAL REACTORS
Sponsoring Organizations:
OECD Dragon Project, Paris (France)
OSTI ID:
21146882
Research Organizations:
UK Atomic Energy Authority (UKAEA), Winfrith (United Kingdom)
Country of Origin:
NEA
Language:
English
Other Identifying Numbers:
TRN: XN71OS024
Availability:
Commercial reproduction prohibited; OSTI as DE21146882
Submitting Site:
OSTI
Size:
14 pages
Announcement Date:
Mar 31, 2009

Citation Formats

Askew, J R, Harris, D W.G., and Hutton, J L. The calculation of resonance capture in granular fuels. NEA: N. p., 1971. Web.
Askew, J R, Harris, D W.G., & Hutton, J L. The calculation of resonance capture in granular fuels. NEA.
Askew, J R, Harris, D W.G., and Hutton, J L. 1971. "The calculation of resonance capture in granular fuels." NEA.
@misc{etde_21146882,
title = {The calculation of resonance capture in granular fuels}
author = {Askew, J R, Harris, D W.G., and Hutton, J L}
abstractNote = {The methods used in the UK for the calculation of resonance capture in granular HTR fuels follow the long established path of determining a 'geometric equivalence' which equates the resonance shielding to that in a homogeneous mixture of the resonance absorber in hydrogen. Simple collision probability arguments, usually for the black limit, were used for AGR and SGHW systems. For granular fuel a 'grey' equivalence, convenient for numerical use, has been adopted, and the geometric solution performed in two ways: by a synthetic collision probability model which is rapid and appropriate for design work and by a Monte Carlo model which allows details of the grain lattice structure to be studied. The results are in good agreement, and are shown to give good results compared with measured relative conversion ratios in the NESTOR stack experiments.}
place = {NEA}
year = {1971}
month = {Feb}
}