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Pulsed neutron source measurements in the subcritical ADS experiment YALINA-Booster
KTH, School of Engineering Sciences (SCI), Physics, Reactor Physics.
KTH, School of Engineering Sciences (SCI), Physics, Reactor Physics.
Joint Institute for Power and Nuclear Research, National Academy of Science of Belarus, Minsk, Belarus.
Joint Institute for Power and Nuclear Research, National Academy of Science of Belarus, Minsk, Belarus.
Show others and affiliations
2008 (English)In: Annals of Nuclear Energy, ISSN 0306-4549, E-ISSN 1873-2100, Vol. 35, no 12, 2357-2364 p.Article in journal (Refereed) Published
Abstract [en]

A subcritical zero-power source-driven coupled core, the YALINA-Booster. has been constructed for experimental investigations of neutron kinetics of source-driven systems. In this study, the reactivity of two subcritical configurations has been determined by the area ratio method. The prompt neutron decay constants have been evaluated through slope fitting of the prompt neutron decay as well as through the pulsed Rossi-alpha method. It is shown that the slope fitting method and the pulsed Rossi-alpha method give stable results whereas the area ratio method results show spatial dependence. The reasons for the spatial spread are addressed.

Place, publisher, year, edition, pages
2008. Vol. 35, no 12, 2357-2364 p.
Keyword [en]
REACTIVITY DETERMINATION
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-12370DOI: 10.1016/j.anucene.2008.07.011ISI: 000261729300023Scopus ID: 2-s2.0-55949092840OAI: oai:DiVA.org:kth-12370DiVA: diva2:310071
Note
QC 20101115Available from: 2010-04-12 Created: 2010-04-12 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Accelerator-driven systems: source efficiency and reacitvity determination
Open this publication in new window or tab >>Accelerator-driven systems: source efficiency and reacitvity determination
2010 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Accelerator-driven systems (ADS) are being investigated and designed for transmutation of the long-lived nuclear waste. Application of ADS allows to safely transmute large fractions of minor actinides (MA) per reactor core, while the fraction in critical reactors is limited to a few percent due to the safety constraints. Additional imposed costs of ADS introduction into the nuclear fuel cycle can be decreased by improving their effciency, particularly the external source effciency.

Design of the European Facility for Industrial Transmutation (EFIT) with transuranium (TRU) oxide fuel has been recently developed in the frame of  the EUROTRANS project. In this thesis it is shown that the neutron and proton source effciency of EFIT can be significantly improved by application of advanced TRU nitride fuel. Thanks to the good neutron economy of the nitride fuel, the EFIT core size can be reduced, which permits reducing the size of the spallation target. This provides a twice higher proton source effciency and therefore lowers the demand for the proton accelerator current. Additionally, the nitride version of EFIT features two times lower coolant void worth improving the core safety.

The pulsed neutron source (PNS) methods for ADS reactivity control have been studied experimentally at the YALINA facility in Minsk (Belarus) and shown good agreement with numerical simulation. The PNS methods will be most probably used for calibration of online reactivity monitoring system in future ADS.

 

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2010. xii, 51 p.
Series
Trita-FYS, ISSN 0280-316X ; 2010:10
National Category
Subatomic Physics
Identifiers
urn:nbn:se:kth:diva-12371 (URN)978-91-7415-577-8 (ISBN)
Presentation
2010-04-12, Sal FA32, AlbaNova, Roslagstullsbacken 21, Stockholm, 15:00 (English)
Opponent
Supervisors
Note
QC 20110412Available from: 2010-04-12 Created: 2010-04-12 Last updated: 2011-04-12Bibliographically approved
2. On measurement and monitoring of reactivity in subcritical reactor systems
Open this publication in new window or tab >>On measurement and monitoring of reactivity in subcritical reactor systems
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Accelerator-driven systems have been proposed for incineration of transuranic elements from spent nuclear fuel. For safe operation of such facilities, a robust method for reactivity monitoring is required. Experience has shown that the performance of reactivity measurement methods in terms of accuracy and applicability is highly system dependent. Further investigations are needed to increase the knowledge data bank before applying the methods to an industrial facility and to achieve license to operate such a facility. In this thesis, two systems have been subject to investigation of various reactivity measurement methods. Conditions for successful utilization of the methods are presented, based on the experimental experience. In contrast to previous studies in this field, the reactivity has not only been determined, but also monitored based on the so called beam trip methodology which is applicable also to non-zero power systems. The results of this work constitute a part of the knowledge base for the definition of a validated online reactivity monitoring methodology for facilities currently being under development in Europe (XT-ADS and EFIT).

Place, publisher, year, edition, pages
Stockholm: KTH, 2010. 72 p.
Series
Trita-FYS, ISSN 0280-316X ; 2010:18
Keyword
reactor, ADS, accelerator-driven systems, subcriticality determination, noise techniques, pulsed neutron source, reactivity monitoring
National Category
Subatomic Physics
Identifiers
urn:nbn:se:kth:diva-12483 (URN)978-91-7415-623-2 (ISBN)
Public defence
2010-05-12, FA32, Albanova University Center, Roslagstullsbacken 21, Stockholm, 14:00 (English)
Opponent
Supervisors
Note
QC 20100621Available from: 2010-05-06 Created: 2010-04-29 Last updated: 2011-06-09Bibliographically approved
3. Reactivity Assessment in Subcritical Systems
Open this publication in new window or tab >>Reactivity Assessment in Subcritical Systems
2007 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

Accelerator-driven systems have been proposed for incineration of transuranic elements from spent nuclear fuel. For safe operation of such facilities, a robust method for reactivity monitoring is required. In this thesis, the most important existing reactivity determination methods have been evaluated experimentally in the subcritical YALINA-experiments in Belarus. It is concluded that the existing methods are sufficient for calibration purposes, but not for reactivity monitoring during regular operation of an accelerator-driven system. Conditions for successful utilization of the various methods are presented, based on the experimental experience.

Place, publisher, year, edition, pages
Stockholm: KTH, 2007. 85 p.
Series
Trita-FYS, ISSN 0280-316X ; 2007:13
Keyword
Reactor Physics
National Category
Subatomic Physics
Identifiers
urn:nbn:se:kth:diva-4363 (URN)978-91-7178-611-1 (ISBN)
Presentation
2007-05-25, FA31, Albanova Universitetscentrum, Roslagstullsbacken 21, Stockholm, 14:00
Opponent
Supervisors
Note
QC 20101115Available from: 2007-05-10 Created: 2007-05-10 Last updated: 2010-11-15Bibliographically approved

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