Report on the repair of the OPAL neutron beam transport system

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dc.contributor.authorPullen, SAen_AU
dc.contributor.authorDavidson, Gen_AU
dc.contributor.authorPangelis, Sen_AU
dc.contributor.authorKlose, Fen_AU
dc.contributor.authorKennedy, SJen_AU
dc.date.accessioned2023-01-19T01:00:28Zen_AU
dc.date.available2023-01-19T01:00:28Zen_AU
dc.date.issued2013-10-13en_AU
dc.date.statistics2022-06-09en_AU
dc.description.abstractThe OPAL research reactor commenced operation early in 2007, and has been in continuous operation for most of the time since then. Initial characterization measurements of the cold and thermal neutron beams that feed the neutron guide hall confirmed the high fluxes that had been predicted in the design process [1], [2]. However, by 2011 it was clear that the performance of the neutron guide system had degraded substantially. Investigation revealed that the degradation resulted from delamination of the guides. The root cause was build-up of mechanical stress in the glass substrates due to alpha radiation produced during neutron capture by boron in the glass. Remediation involved replacement of 72 metres of the neutron guide system with guides that use glass substrates which have higher radiation resistance. Neutron flux and spectrum measurements have since verified that the performance of the system has largely been restored. Preliminary measurements at the neutron spectrometers since repair reveal flux increases in the range of 40 % to 90 % relative to 2011. © The Authorsen_AU
dc.identifier.citationPullen, S., Davidson, G., Pangelis, S., Klose, F., & Kennedy, S. (2013). Report on the repair of the OPAL neutron beam transport system. Paper presented at the 15th meeting of the International Group on Research Reactors, "IGORR 15", 13-18 Oct 2013, Daejeon, South Korea, Retrieved from: https://www.igorr.com/Documents/2013-DAEJEON/02_1026.pdfen_AU
dc.identifier.conferenceenddate18 October 2013en_AU
dc.identifier.conferencename15th Meeting of the International Group on Research Reactors, 'IGORR 15'en_AU
dc.identifier.conferenceplaceDaejeon, South Koreaen_AU
dc.identifier.conferencestartdate13 October 2013en_AU
dc.identifier.urihttps://www.igorr.com/Documents/2013-DAEJEON/02_1026.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/14397en_AU
dc.language.isoenen_AU
dc.publisherInternational Group On Research Reactorsen_AU
dc.subjectNeutron beamsen_AU
dc.subjectNeutron fluxen_AU
dc.subjectNeutron spectrometersen_AU
dc.subjectOPAL Reactoren_AU
dc.subjectPerformanceen_AU
dc.subjectRadiationsen_AU
dc.subjectRepairen_AU
dc.subjectANSTOen_AU
dc.titleReport on the repair of the OPAL neutron beam transport systemen_AU
dc.typeConference Paperen_AU
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