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Sensitivity and uncertainty analyses of the tritium production in the HCPB breeder blanket mock-up experiment

TitoloSensitivity and uncertainty analyses of the tritium production in the HCPB breeder blanket mock-up experiment
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2007
AutoriLeichtle, D., Fischer U., Kodeli I., Perel R.L., Angelone Massimo, Batistoni P., Carconi P., Pillon M., Schäfer I., Seidel K., Villari R., and Zappa Giovanna
RivistaFusion Engineering and Design
Volume82
Paginazione2406 - 2412
Data di pubblicazione2007///
Parole chiaveNeutronics, Nuclear cross sections, Sensitivity analysis, Tritium breeder blanket, Tritium production rate, Uncertainty analysis
Abstract

A neutronics experiment performed at the Frascati Neutron Generator (FNG) on a mock-up of the Helium-Cooled Pebble Bed (HCPB) breeder test blanket module (TBM) has been analysed on the basis of neutron transport, sensitivity and uncertainty calculations using both deterministic and probabilistic computational methods. The calculations revealed a slight but systematic underestimation of the measured tritium activities by 5 to 10% on average, independent of the nuclear data used that were taken from the EFF-3 and FENDL-2.0, -2.1 data files. The uncertainty assessments showed data related uncertainties of the calculated tritium production rates at a level of 4% (2σ confidence level). The beryllium cross-section data were shown to be the main source of these uncertainties. The total uncertainties of the tritium production prediction including the data uncertainties, the statistical uncertainties of the Monte Carlo calculation and the experimental uncertainties are in the order of 8 to 10% (2σ). The observed underestimation of the measured tritium production is at the lower bound of the assessed uncertainty margin. The obtained results indicate that design calculations for the tritium breeding ratio (TBR) of fusion power reactors employing a HCPB type breeder blanket are conservative. Thus, an additional TBR margin is provided which allows compensation for potential other uncertainties. © 2007 Elsevier B.V. All rights reserved.

Note

Cited By (since 1996): 3Export Date: 1 September 2010Source: Scopus

URLhttp://www.scopus.com/inward/record.url?eid=2-s2.0-35148812219&partnerID=40&md5=392788a756783792cde7256f4d37f566
Citation Key541