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Utilization of titanium sponge in H. T. G. R

Journal Article:

Abstract

The high temperature, gas-cooled reactor (H.T.G.R.) uses helium as a coolant and graphite as both the moderator and the fuel tube material. At first sight, there should not be any problem concerning the compatibility of these materials in the H.T.G.R. core region where temperature exceeds 700/sup 0/C, however, it is possible that the graphite core and other structural materials are oxidized by traces of impurities in the coolant. In large-power H.T.G.R., water inleakage from both heat exchangers and coolant circulation pumps will probably be the major source of impurity which will react with the graphite-producing H/sub 2/, CO and CO/sub 2/. In the near future, the nuclear heat of H.T.G.R. will be used as a major heat source for steel production and the chemical industry. For these purposes, it will be necessary to construct a reactor using a helium coolant of greater than 1000/sup 0/C. Therefore, not only the development of refractory metals as structural materials but also an effective helium coolant purification system are the keys for H.T.G.R. construction. Recently, in the helium coolant purification system of H.T.G. Reactors, which have been developed in the several nations advanced in atomic reactors, titanium sponge is used very frequently to remove  More>>
Authors:
Tone, H [1] 
  1. Japan Atomic Energy Research Inst., Oarai, Ibaraki. Oarai Research Establishment
Publication Date:
Oct 01, 1977
Product Type:
Journal Article
Reference Number:
AIX-09-391157; ERA-03-057191; EDB-78-120419
Resource Relation:
Journal Name: Chitaniumu Jirukoniumu; (Japan); Journal Volume: 25:4
Subject:
36 MATERIALS SCIENCE; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; HTGR TYPE REACTORS; COOLANT CLEANUP SYSTEMS; TITANIUM; CHEMISORPTION; USES; COOLANTS; HELIUM; HIGH TEMPERATURE; HYDROGEN; IN PILE LOOPS; PURIFICATION; CHEMICAL REACTIONS; COOLING SYSTEMS; CRYOGENIC FLUIDS; ELEMENTS; FLUIDS; GAS COOLED REACTORS; GRAPHITE MODERATED REACTORS; METALS; NONMETALS; PRIMARY COOLANT CIRCUITS; RARE GASES; REACTOR COMPONENTS; REACTOR COOLING SYSTEMS; REACTOR EXPERIMENTAL FACILITIES; REACTORS; SEPARATION PROCESSES; SORPTION; TRANSITION ELEMENTS; 360104* - Metals & Alloys- Physical Properties; 210300 - Power Reactors, Nonbreeding, Graphite Moderated
OSTI ID:
6666233
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: CODEN: CHJIA
Submitting Site:
INIS
Size:
Pages: 167-178
Announcement Date:

Journal Article:

Citation Formats

Tone, H. Utilization of titanium sponge in H. T. G. R. Japan: N. p., 1977. Web.
Tone, H. Utilization of titanium sponge in H. T. G. R. Japan.
Tone, H. 1977. "Utilization of titanium sponge in H. T. G. R." Japan.
@misc{etde_6666233,
title = {Utilization of titanium sponge in H. T. G. R}
author = {Tone, H}
abstractNote = {The high temperature, gas-cooled reactor (H.T.G.R.) uses helium as a coolant and graphite as both the moderator and the fuel tube material. At first sight, there should not be any problem concerning the compatibility of these materials in the H.T.G.R. core region where temperature exceeds 700/sup 0/C, however, it is possible that the graphite core and other structural materials are oxidized by traces of impurities in the coolant. In large-power H.T.G.R., water inleakage from both heat exchangers and coolant circulation pumps will probably be the major source of impurity which will react with the graphite-producing H/sub 2/, CO and CO/sub 2/. In the near future, the nuclear heat of H.T.G.R. will be used as a major heat source for steel production and the chemical industry. For these purposes, it will be necessary to construct a reactor using a helium coolant of greater than 1000/sup 0/C. Therefore, not only the development of refractory metals as structural materials but also an effective helium coolant purification system are the keys for H.T.G.R. construction. Recently, in the helium coolant purification system of H.T.G. Reactors, which have been developed in the several nations advanced in atomic reactors, titanium sponge is used very frequently to remove hydrogen gas as an impurity in helium coolant. Titanium sponge can absorb very large quantities of hydrogen and its absorption-capacity can be very easily controlled by controlling the temperature of the titanium sponge-since titanium hydride is formed by endothermic reaction. The titanium sponge trap is used also in OGL-1 (Oarai Gas Loop-1), helium coolant purification system for large scale irradiation apparatus which is used for nuclear fuels of H.T.G.R. This apparatus has been installed in the Japan Material Testing Reactor. In this report, the coolant purification system of H.T.G.R., OGL-1 and the experimental results of the titanium sponge trap are explained briefly.}
journal = {Chitaniumu Jirukoniumu; (Japan)}
volume = {25:4}
journal type = {AC}
place = {Japan}
year = {1977}
month = {Oct}
}