CALIBRATION AND HOT TESTING OF THE ADVANCED NUCLEAR MEASUREMENT SYSTEMS USED FOR WASTE CHARACTERIZATION IN COGEMA'S NEW ACC COMPACTION FACILITY

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Spent nuclear fuel from commercial power reactors is reprocessed at the COGEMA plant in La Hague. After shearing and dissolution of the fuel assemblies, the hulls and nozzles are sent to COGEMA's new compaction facility (ACC) to reduce the final volume of waste. Technological waste generated in the reprocessing plant is also sent to the ACC facility. Compacted waste is characterized by two measurement stations: a gamma spectrometry station and an active and passive neutron measurement station. The main purpose of these measurement stations is to determine the guaranteed nuclear parameters of the compacted waste and their associated uncertainties: (1) ... continued below

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11 pages

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Toubon, H.; Vuillier; Gain, T. & Huver, M. February 27, 2003.

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Spent nuclear fuel from commercial power reactors is reprocessed at the COGEMA plant in La Hague. After shearing and dissolution of the fuel assemblies, the hulls and nozzles are sent to COGEMA's new compaction facility (ACC) to reduce the final volume of waste. Technological waste generated in the reprocessing plant is also sent to the ACC facility. Compacted waste is characterized by two measurement stations: a gamma spectrometry station and an active and passive neutron measurement station. The main purpose of these measurement stations is to determine the guaranteed nuclear parameters of the compacted waste and their associated uncertainties: (1) total U and Pu masses, (2) Pu, Cm, and total alpha activities, (3) 137Cs, 90Sr-90Y,241Pu beta activities, (4) decay heat. After giving a description of the measurement stations, this paper will describe the qualification tests performed in the context of the ACC project. The extensive calibration tests performed on site with different sources and different waste matrices will be described (approximately 500 neutron and gamma experiments). Hot tests that were conducted after hot start-up at the end of 2001 and prior to the start of commercial operation will be also presented. A number of drums produced by the upstream facilities were introduced one by one into the ACC facility in order to avoid mixing of different fuel assemblies. This procedure allows comparison between characterization performed in the upstream facilities on the basis of fuel data available before processing and the measurements performed on the new ACC stations. These comparisons showed good agreement between the different methods of characterization and thus validated the innovative technologies and methods used by COGEMA for compacted waste generated by the ACC facility.

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11 pages

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  • Waste Management 2003 Symposium, Tucson, AZ (US), 02/23/2003--02/27/2003

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  • Report No.: NONE
  • Grant Number: NONE
  • Office of Scientific & Technical Information Report Number: 825887
  • Archival Resource Key: ark:/67531/metadc783018

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  • February 27, 2003

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  • Dec. 3, 2015, 9:30 a.m.

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Toubon, H.; Vuillier; Gain, T. & Huver, M. CALIBRATION AND HOT TESTING OF THE ADVANCED NUCLEAR MEASUREMENT SYSTEMS USED FOR WASTE CHARACTERIZATION IN COGEMA'S NEW ACC COMPACTION FACILITY, article, February 27, 2003; (digital.library.unt.edu/ark:/67531/metadc783018/: accessed November 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.