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Title: Cryogenic analysis of liquid hydrogen flow through the HFIR cold source

Abstract

In 1995 a project was initiated to design, test, and install a cold neutron source facility in the High-Flux Isotope Reactor (HFIR) located at Oak Ridge National Laboratory. Initial feasibility studies demonstrated that a cold source could be retrofitted into an existing HFIR beam tube providing a small but very bright cold neutron beam. This cold neutron beam would be comparable, in cold neutron brightness, to the best facilities in the world. Supercritical hydrogen (LH2) at cryogenic temperature serves as both the medium for neutron moderation and the working fluid for removal of heat generated internally due to neutron and gamma bombardment of both the moderator vessel and the hydrogen cryogen itself. Because of the high heat loads experienced by the cold source, multidimensional thermal-hydraulic analyses of the moderator vessel are a critical design subtask. A previous analysis of the reference design concept was used to redesign the moderator vessel. Also, the orientation of the vessel was changed so that the inlet and outlet lie on the horizontal midplane with the inlet located farther from the core. Herein the authors provide an update for the numerical thermal-hydraulic studies that have recently been completed for the final design of the HFIRmore » cold source moderator.« less

Authors:
; ;  [1]
  1. Oak Ridge National Lab., TN (United States)
Publication Date:
OSTI Identifier:
678167
Report Number(s):
CONF-990605-
Journal ID: TANSAO; ISSN 0003-018X; TRN: 99:009152
Resource Type:
Journal Article
Journal Name:
Transactions of the American Nuclear Society
Additional Journal Information:
Journal Volume: 80; Conference: 1999 annual meeting of the American Nuclear Society (ANS), Boston, MA (United States), 6-10 Jun 1999; Other Information: PBD: 1999
Country of Publication:
United States
Language:
English
Subject:
22 NUCLEAR REACTOR TECHNOLOGY; HFIR REACTOR; COLD NEUTRONS; NEUTRON SOURCES; RETROFITTING; REACTOR EXPERIMENTAL FACILITIES; SUPERCRITICAL STATE; HYDROGEN; CRYOGENICS; MODERATORS; HEAT TRANSFER FLUIDS; HEAT TRANSFER; HYDRAULICS

Citation Formats

Wendel, M.W., Lucas, A.T., and Williams, P.T. Cryogenic analysis of liquid hydrogen flow through the HFIR cold source. United States: N. p., 1999. Web.
Wendel, M.W., Lucas, A.T., & Williams, P.T. Cryogenic analysis of liquid hydrogen flow through the HFIR cold source. United States.
Wendel, M.W., Lucas, A.T., and Williams, P.T. Wed . "Cryogenic analysis of liquid hydrogen flow through the HFIR cold source". United States.
@article{osti_678167,
title = {Cryogenic analysis of liquid hydrogen flow through the HFIR cold source},
author = {Wendel, M.W. and Lucas, A.T. and Williams, P.T.},
abstractNote = {In 1995 a project was initiated to design, test, and install a cold neutron source facility in the High-Flux Isotope Reactor (HFIR) located at Oak Ridge National Laboratory. Initial feasibility studies demonstrated that a cold source could be retrofitted into an existing HFIR beam tube providing a small but very bright cold neutron beam. This cold neutron beam would be comparable, in cold neutron brightness, to the best facilities in the world. Supercritical hydrogen (LH2) at cryogenic temperature serves as both the medium for neutron moderation and the working fluid for removal of heat generated internally due to neutron and gamma bombardment of both the moderator vessel and the hydrogen cryogen itself. Because of the high heat loads experienced by the cold source, multidimensional thermal-hydraulic analyses of the moderator vessel are a critical design subtask. A previous analysis of the reference design concept was used to redesign the moderator vessel. Also, the orientation of the vessel was changed so that the inlet and outlet lie on the horizontal midplane with the inlet located farther from the core. Herein the authors provide an update for the numerical thermal-hydraulic studies that have recently been completed for the final design of the HFIR cold source moderator.},
doi = {},
journal = {Transactions of the American Nuclear Society},
number = ,
volume = 80,
place = {United States},
year = {1999},
month = {9}
}