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Title: Apparatus for in situ determination of burnup, cooling time and fissile content of an irradiated nuclear fuel assembly in a fuel storage pond

Abstract

A detector head for in situ inspection of irradiated nuclear fuel assemblies submerged in a water-filled nuclear fuel storage pond. The detector head includes two parallel arms which extend from a housing and which are spaced apart so as to be positionable on opposite sides of a submerged fuel assembly. Each arm includes an ionization chamber and two fission chambers. One fission chamber in each arm is enclosed in a cadmium shield and the other fission chamber is unshielded. The ratio of the outputs of the shielded and unshielded fission chambers is used to determine the boron content of the pond water. Correcting for the boron content, the neutron flux and gamma ray intensity are then used to verify the declared exposure, cooling time and fissile material content of the irradiated fuel assembly.

Inventors:
; ; ;
Publication Date:
OSTI Identifier:
5407195
Application Number:
ON: DE84005966
Assignee:
EDB-84-037718
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; FUEL POOLS; RADIATION MONITORING; FISSION CHAMBERS; IONIZATION CHAMBERS; BORON; GAMMA DETECTION; NEUTRON FLUX; DETECTION; ELEMENTS; MEASURING INSTRUMENTS; MONITORING; NEUTRON DETECTORS; RADIATION DETECTION; RADIATION DETECTORS; RADIATION FLUX; SEMIMETALS; 440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments

Citation Formats

Phillips, J.R., Halbig, J.K., Menlove, H.O., and Klosterbuer, S.F. Apparatus for in situ determination of burnup, cooling time and fissile content of an irradiated nuclear fuel assembly in a fuel storage pond. United States: N. p., 1984. Web.
Phillips, J.R., Halbig, J.K., Menlove, H.O., & Klosterbuer, S.F. Apparatus for in situ determination of burnup, cooling time and fissile content of an irradiated nuclear fuel assembly in a fuel storage pond. United States.
Phillips, J.R., Halbig, J.K., Menlove, H.O., and Klosterbuer, S.F. Sun . "Apparatus for in situ determination of burnup, cooling time and fissile content of an irradiated nuclear fuel assembly in a fuel storage pond". United States. doi:.
@article{osti_5407195,
title = {Apparatus for in situ determination of burnup, cooling time and fissile content of an irradiated nuclear fuel assembly in a fuel storage pond},
author = {Phillips, J.R. and Halbig, J.K. and Menlove, H.O. and Klosterbuer, S.F.},
abstractNote = {A detector head for in situ inspection of irradiated nuclear fuel assemblies submerged in a water-filled nuclear fuel storage pond. The detector head includes two parallel arms which extend from a housing and which are spaced apart so as to be positionable on opposite sides of a submerged fuel assembly. Each arm includes an ionization chamber and two fission chambers. One fission chamber in each arm is enclosed in a cadmium shield and the other fission chamber is unshielded. The ratio of the outputs of the shielded and unshielded fission chambers is used to determine the boron content of the pond water. Correcting for the boron content, the neutron flux and gamma ray intensity are then used to verify the declared exposure, cooling time and fissile material content of the irradiated fuel assembly.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1984},
month = {Sun Jan 01 00:00:00 EST 1984}
}