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Title: Improved gas tagging and cover gas combination for nuclear reactor

Abstract

The invention discloses the use of stable isotopes of neon and argon, sealed as tags in different cladding nuclear fuel elements to be used in a liquid metal fast breeder reactor. Cladding failure allows fission gases and these tag isotopes to escape and to combine with the cover gas. The isotopes are Ne/sup 20/, Ne/sup 21/ and Ne/sup 22/ and Ar/sup 36/, Ar/sup 38/ and Ar/sup 40/, and the cover gas is He. Serially connected cryogenically operated charcoal beds are used to clean the cover gas and to separate out the tags. The first or cover gas cleanup bed is held between 0 and -25/sup 0/C to remove the fission gases from the cover gas and tags, and the second or tag recovery system bed between -170 and -185/sup 0/C to isolate the tags from the cover gas. Spectrometric analysis is used to identify the specific tags that are recovered, and thus the specific leaking fuel element. By cataloging the fuel element tags to the location of the fuel elements in the reactor, the location of the leaking fuel element can then be determined.

Inventors:
;
Publication Date:
OSTI Identifier:
6926256
Alternate Identifier(s):
OSTI ID: 6926256; Legacy ID: DE84011290
Application Number:
ON: DE84011290
Assignee:
Dept. of Energy ERA-09-025944; EDB-84-082219
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; FAILED ELEMENT MONITORS; LMFBR TYPE REACTORS; ARGON ISOTOPES; COVER GAS; FAILED ELEMENT DETECTION; FISSION PRODUCTS; NEON ISOTOPES; BREEDER REACTORS; DETECTION; EPITHERMAL REACTORS; FAST REACTORS; FBR TYPE REACTORS; FLUIDS; GASES; INERT ATMOSPHERE; ISOTOPES; LIQUID METAL COOLED REACTORS; MATERIALS; MEASURING INSTRUMENTS; MONITORS; RADIOACTIVE MATERIALS; REACTORS 210500* -- Power Reactors, Breeding

Citation Formats

Gross, K.C., and Laug, M.T. Improved gas tagging and cover gas combination for nuclear reactor. United States: N. p., 1983. Web.
Gross, K.C., & Laug, M.T. Improved gas tagging and cover gas combination for nuclear reactor. United States.
Gross, K.C., and Laug, M.T. Mon . "Improved gas tagging and cover gas combination for nuclear reactor". United States.
@article{osti_6926256,
title = {Improved gas tagging and cover gas combination for nuclear reactor},
author = {Gross, K.C. and Laug, M.T.},
abstractNote = {The invention discloses the use of stable isotopes of neon and argon, sealed as tags in different cladding nuclear fuel elements to be used in a liquid metal fast breeder reactor. Cladding failure allows fission gases and these tag isotopes to escape and to combine with the cover gas. The isotopes are Ne/sup 20/, Ne/sup 21/ and Ne/sup 22/ and Ar/sup 36/, Ar/sup 38/ and Ar/sup 40/, and the cover gas is He. Serially connected cryogenically operated charcoal beds are used to clean the cover gas and to separate out the tags. The first or cover gas cleanup bed is held between 0 and -25/sup 0/C to remove the fission gases from the cover gas and tags, and the second or tag recovery system bed between -170 and -185/sup 0/C to isolate the tags from the cover gas. Spectrometric analysis is used to identify the specific tags that are recovered, and thus the specific leaking fuel element. By cataloging the fuel element tags to the location of the fuel elements in the reactor, the location of the leaking fuel element can then be determined.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {9}
}