Retrospective dosimetry based on niobium extraction and counting

VTT 's contribution to the RETROSPEC project

Tom Séren, Tommi Kekki

Research output: Book/ReportReportProfessional

Abstract

Within the European Commission 5th Framework RETROSPEC project several irradiated VVER-440 pressure vessel materials have been investigated in order to determine the feasibility of "retrospective" neutron dosimetry based on the analysis of 93mNb induced in structural reactor materials containing small amounts of niobium (about 50 ppm to 1 %). Methods for chemical separation of niobium and activity measurements, previously developed at VTT, were tested and refined and found accurate and reliable for typical cladding materials. For base material containing niobium only as an impurity the methods were not successful. The measured specific 93mNb activities were in good agreement with both calculated activities and other induced activities in the same materials and in dedicated dosimetry materials irradiated together with the investigated materials. The results of the three participants (NRG Petten, VTT and SCKoCEN) will be compared and summarised in a final report published by NRG Petten. The feasibility of different chemical separation and activity determination methods will be evaluated in a Code of Practice.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages40
ISBN (Electronic)951-38-6180-5
ISBN (Print)951-38-6179-1
Publication statusPublished - 2003
MoE publication typeNot Eligible

Publication series

NameVTT Tiedotteita - Research Notes
PublisherVTT
No.2203
ISSN (Print)1235-0605
ISSN (Electronic)1455-0865

Fingerprint

niobium
dosimeters
counting
reactor materials
pressure vessels
neutrons
impurities

Keywords

  • nuclear reactors
  • reactor dosimetry
  • RETROSPEC
  • reactor materials
  • niobium
  • extraction
  • counting
  • retrospective dosimetry
  • pressure vessels
  • embrittlement

Cite this

Séren, T., & Kekki, T. (2003). Retrospective dosimetry based on niobium extraction and counting: VTT 's contribution to the RETROSPEC project. Espoo: VTT Technical Research Centre of Finland. VTT Tiedotteita - Meddelanden - Research Notes, No. 2203
Séren, Tom ; Kekki, Tommi. / Retrospective dosimetry based on niobium extraction and counting : VTT 's contribution to the RETROSPEC project. Espoo : VTT Technical Research Centre of Finland, 2003. 40 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 2203).
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abstract = "Within the European Commission 5th Framework RETROSPEC project several irradiated VVER-440 pressure vessel materials have been investigated in order to determine the feasibility of {"}retrospective{"} neutron dosimetry based on the analysis of 93mNb induced in structural reactor materials containing small amounts of niobium (about 50 ppm to 1 {\%}). Methods for chemical separation of niobium and activity measurements, previously developed at VTT, were tested and refined and found accurate and reliable for typical cladding materials. For base material containing niobium only as an impurity the methods were not successful. The measured specific 93mNb activities were in good agreement with both calculated activities and other induced activities in the same materials and in dedicated dosimetry materials irradiated together with the investigated materials. The results of the three participants (NRG Petten, VTT and SCKoCEN) will be compared and summarised in a final report published by NRG Petten. The feasibility of different chemical separation and activity determination methods will be evaluated in a Code of Practice.",
keywords = "nuclear reactors, reactor dosimetry, RETROSPEC, reactor materials, niobium, extraction, counting, retrospective dosimetry, pressure vessels, embrittlement",
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Séren, T & Kekki, T 2003, Retrospective dosimetry based on niobium extraction and counting: VTT 's contribution to the RETROSPEC project. VTT Tiedotteita - Meddelanden - Research Notes, no. 2203, VTT Technical Research Centre of Finland, Espoo.

Retrospective dosimetry based on niobium extraction and counting : VTT 's contribution to the RETROSPEC project. / Séren, Tom; Kekki, Tommi.

Espoo : VTT Technical Research Centre of Finland, 2003. 40 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 2203).

Research output: Book/ReportReportProfessional

TY - BOOK

T1 - Retrospective dosimetry based on niobium extraction and counting

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AU - Séren, Tom

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N2 - Within the European Commission 5th Framework RETROSPEC project several irradiated VVER-440 pressure vessel materials have been investigated in order to determine the feasibility of "retrospective" neutron dosimetry based on the analysis of 93mNb induced in structural reactor materials containing small amounts of niobium (about 50 ppm to 1 %). Methods for chemical separation of niobium and activity measurements, previously developed at VTT, were tested and refined and found accurate and reliable for typical cladding materials. For base material containing niobium only as an impurity the methods were not successful. The measured specific 93mNb activities were in good agreement with both calculated activities and other induced activities in the same materials and in dedicated dosimetry materials irradiated together with the investigated materials. The results of the three participants (NRG Petten, VTT and SCKoCEN) will be compared and summarised in a final report published by NRG Petten. The feasibility of different chemical separation and activity determination methods will be evaluated in a Code of Practice.

AB - Within the European Commission 5th Framework RETROSPEC project several irradiated VVER-440 pressure vessel materials have been investigated in order to determine the feasibility of "retrospective" neutron dosimetry based on the analysis of 93mNb induced in structural reactor materials containing small amounts of niobium (about 50 ppm to 1 %). Methods for chemical separation of niobium and activity measurements, previously developed at VTT, were tested and refined and found accurate and reliable for typical cladding materials. For base material containing niobium only as an impurity the methods were not successful. The measured specific 93mNb activities were in good agreement with both calculated activities and other induced activities in the same materials and in dedicated dosimetry materials irradiated together with the investigated materials. The results of the three participants (NRG Petten, VTT and SCKoCEN) will be compared and summarised in a final report published by NRG Petten. The feasibility of different chemical separation and activity determination methods will be evaluated in a Code of Practice.

KW - nuclear reactors

KW - reactor dosimetry

KW - RETROSPEC

KW - reactor materials

KW - niobium

KW - extraction

KW - counting

KW - retrospective dosimetry

KW - pressure vessels

KW - embrittlement

M3 - Report

SN - 951-38-6179-1

T3 - VTT Tiedotteita - Research Notes

BT - Retrospective dosimetry based on niobium extraction and counting

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ER -

Séren T, Kekki T. Retrospective dosimetry based on niobium extraction and counting: VTT 's contribution to the RETROSPEC project. Espoo: VTT Technical Research Centre of Finland, 2003. 40 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 2203).