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Title: GAS COOLED NUCLEAR REACTORS

Abstract

A gas-cooled nuclear reactor consisting of a graphite reacting core and reflector structure supported in a containing vessel is described. A gas sealing means is included for sealing between the walls of the graphite structure and containing vessel to prevent the gas coolant by-passing the reacting core. The reacting core is a multi-sided right prismatic structure having a pair of parallel slots around its periphery. The containing vessel is cylindrical and has a rib on its internal surface which supports two continuous ring shaped flexible web members with their radially innermost ends in sealing engagement within the radially outermost portion of the slots. The core structure is supported on ball bearings. This design permits thermal expansion of the core stracture and vessel while maintainirg a peripheral seal between the tvo elements.

Inventors:
;
Publication Date:
Research Org.:
Originating Research Org. not identified
OSTI Identifier:
4310576
Patent Number(s):
US 2838451
Assignee:
U. S. Atomic Energy Commission DTIE; NSA-12-014463
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-58
Country of Publication:
United States
Language:
English
Subject:
PATENTS; BEARINGS; CONFIGURATION; EXPANSION; GAS COOLANT; GRAPHITE MODERATOR; PATENT; REACTOR CORE; REACTORS; REFLECTORS; SEALS; SURFACES; TEMPERATURE; VESSELS

Citation Formats

Long, E., and Rodwell, W. GAS COOLED NUCLEAR REACTORS. United States: N. p., 1958. Web.
Long, E., & Rodwell, W. GAS COOLED NUCLEAR REACTORS. United States.
Long, E., and Rodwell, W. 1958. "GAS COOLED NUCLEAR REACTORS". United States. doi:.
@article{osti_4310576,
title = {GAS COOLED NUCLEAR REACTORS},
author = {Long, E. and Rodwell, W.},
abstractNote = {A gas-cooled nuclear reactor consisting of a graphite reacting core and reflector structure supported in a containing vessel is described. A gas sealing means is included for sealing between the walls of the graphite structure and containing vessel to prevent the gas coolant by-passing the reacting core. The reacting core is a multi-sided right prismatic structure having a pair of parallel slots around its periphery. The containing vessel is cylindrical and has a rib on its internal surface which supports two continuous ring shaped flexible web members with their radially innermost ends in sealing engagement within the radially outermost portion of the slots. The core structure is supported on ball bearings. This design permits thermal expansion of the core stracture and vessel while maintainirg a peripheral seal between the tvo elements.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1958,
month = 6
}
  • In a nuclear fuel rod cluster in which the rods are supported axes parallel and held in spaced relationship by transverse grids, a number of auxiliary coolant spray pipes are positioned among the fuel rods. At least one grid has attached to it a target plate which extends between the fuel rods to deflect auxiliary coolant sprays on to the surfaces of portions of the rods which would otherwise not be cooled by the spray.
  • In many gas-cooled reactors, with vertical channels, a charge-discharge machine is provided that can be displaced on a charging floor above the top of the reactor and can be brought into alignment with the different charging holes in this floor. The fuel element removed from such a reactor is stored in an annular rotatable magazine, which is then discharged from the machine together with the fuel elements as a unit. The machine is filled with a gaseous coolant. In order to avoid too high gas losses from the machine during the discharge of the magazine, the space enclosed by themore » machine is divided into two parts, an upper part enclosing the hoisting and handling means and a lower part enclosing the magazine. These parts can be separated from each other in a gas-tight manner by closure of the dividing element, so that during the discharge of the magazine only the gas enclosed by the lower part of the space is lost. (NPO)« less
  • The French Patent 1,226,423 described auxiliary cooling means for a gas-cooled nuclear reactor. These auxiliary cooling means comprised a container enclosing a mass held at a low temperature and able to absorb the heat developed inside the reactor during a reactor incident. According to the present addition, this mass is constituted by metal having a high ratio of surface to volume, e.g., sheets. Means are provided for filling said container with a refrigerating fluid, for cooling the said mass by chilling said refrigerating fluid with the aid of a refrigerating apparatus, and for evacuating the container after the mass hasmore » been cooled to a predetermined low temperature. This last measure is taken in order to prevent heat convection from the container wall to the said cold storing mass. For compensating the losses of cold from said mass, the said refrigerating apparatus feeds auxiliary cooling coils passing through the container. (NPO)« less