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Title: REACTOR FUEL ELEMENTS TESTING CONTAINER

Abstract

This patent shows a method for detecting leaks in jacketed fuel elements. The element is placed in a sealed tank within a nuclear reactor, and, while the reactor operates, the element is sparged with gas. The gas is then led outside the reactor and monitored for radioactive Xe or Kr. (AEC)

Inventors:
;
Publication Date:
Research Org.:
Originating Research Org. not identified
OSTI Identifier:
4715958
Patent Number(s):
US 3073767
Assignee:
U.S. Atomic Energy Commission DTIE; NSA-17-010037
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-63
Country of Publication:
United States
Language:
English
Subject:
REACTOR TECHNOLOGY; CONTAINERS; DETECTION; FISSION PRODUCTS; FUEL CANS; FUEL ELEMENTS; GASES; JACKETS; KRYPTON; LEAKS; MONITORING; OPERATION; PLANNING; RADIOACTIVITY; REACTORS; SEALS; TESTING; VESSELS; XENON

Citation Formats

Whitham, G.K., and Smith, R.R. REACTOR FUEL ELEMENTS TESTING CONTAINER. United States: N. p., 1963. Web.
Whitham, G.K., & Smith, R.R. REACTOR FUEL ELEMENTS TESTING CONTAINER. United States.
Whitham, G.K., and Smith, R.R. 1963. "REACTOR FUEL ELEMENTS TESTING CONTAINER". United States. doi:.
@article{osti_4715958,
title = {REACTOR FUEL ELEMENTS TESTING CONTAINER},
author = {Whitham, G.K. and Smith, R.R.},
abstractNote = {This patent shows a method for detecting leaks in jacketed fuel elements. The element is placed in a sealed tank within a nuclear reactor, and, while the reactor operates, the element is sparged with gas. The gas is then led outside the reactor and monitored for radioactive Xe or Kr. (AEC)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1963,
month = 1
}
  • The reactor is provided with a base that contains a sealing device for the channel for the entrance of the fuel element. The base is placed with its lower face on the opening provided at this place in the cover of the reactor. With the aid of means of grasping the fuel elements, one can lift them and place them in the entrance channel of the exchange container and replace them by others. (TSS)
  • A method of testing the circulation of a bulk charge of fuel elements in the core of a pebble bed type of nuclear reactor comprises increasing the electrical conductivity of a number of fuel elements and then injecting the marked elements into a bulk charge of other unmarked elements having a lower electrical conductivity at predetermined positions in the core of a nuclear reactor and at measured times. The marked fuel elements are subsequently detected electromagnetically as they are carried in the bulk charge of unmarked elements through an electromagnetic field generated by a detection and measurement station. The elementsmore » are marked by including a material having a greater electrical conductivity than the remainder of the element and this material may be coated on the surface of the elements or incorporated in the body of the elements.« less
  • In the method described for leak testing a helium-filled nuclear reactor fuel element the fuel element is immersed in He to cause He to enter the sheath. The sheath is sealed, and the fuel element is transferred to a chamber filled with a gas other than He at a pressure such that, if there is a leak in the fuel element sheath, He can diffuse from the fuel element sheath through the leak into the chamber without desorption of He from the surface of the sheath. The gas in the chamber is then tested for He content without reducing themore » pressure of gas in the chamber below the pressure at which He desorbs from the surface of the fuel element sheath. A leak test chamber is described, which is connected to a mass spectrometer through an adjustable leak. (A.G.W.)« less
  • S>A method of testing fuel elements for surface U contamination below 1 mu g/foot is described. The fuel element is placed in an Al sleeve and surrounded by two semicylindrical ZnS phosphors. The phosphors are optically coupled to a photomultiplier-amplifier-counter arrangement. The fuel element, phosphors, and photomultipliers are placed in a neutron flux of approximately 10/ sup 8/ neutrons/cm/sup 2/sec and the fuel element is lowered past the phosphors at 4 in./min. Contamination is revealed by scintillation detection of fission fragments. (T.R.H.)