OPAL cold neutron guide in-pile replacement

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dc.contributor.authorRownes, Ten_AU
dc.contributor.authorEltobaji, Aen_AU
dc.contributor.authorBell, Men_AU
dc.contributor.authorKlose, Fen_AU
dc.date.accessioned2022-08-26T01:47:04Zen_AU
dc.date.available2022-08-26T01:47:04Zen_AU
dc.date.issued2013-10-13en_AU
dc.date.statistics2022-07-08en_AU
dc.description.abstractThe 20 MWth OPAL research reactor has five neutron beam assemblies. These provide cold and thermal neutrons to various neutron guides and associated neutron beam instruments. In 2010 a project was initiated to install a new cold neutron guide, CG2, in one of the assemblies. This installation would allow up to four new neutron beam instruments to be built, significantly expanding the reactor's capabilities. The project concluded in December 2012 with the successful installation of CG2. Each neutron beam assembly has an in-pile plug, a primary shutter and a front cover. Together these constitute the neutron guide's in-pile components, with a total mass of over 12 tonnes. The CG2 installation required the complete replacement of the existing components. This replacement was scheduled to coincide with OPAL's first major shutdown. With a budget of $2.3 million and an expected dose of 50 man.mSv, the CG2 installation was a large and complex task. Work during the shutdown involved over 40 ANSTO personnel and radiation fields approached 1 Sv/h in some areas. Despite this, the installation team received a collective dose of only 10 man.mSv, and the project was completed to budget and within schedule. This paper will outline the details of the project, focusing on lessons learned and recommended practices. Each OPAL in-pile plug has a design life of 10 years at full power operation, and similar replacements will be performed regularly as the reactor ages. It is hoped that this information will be useful for other research reactors planning large capital engineering projects.en_AU
dc.identifier.citationRownes, T., Eltobaji, A., Bell, M., & Klose, F. (2013). OPAL cold neutron guide in-pile replacement. Paper presented at the 15th Meeting of the International Group on Research Reactors, "IGORR 15", Daejeon, South Korea, 13-18 Oct 2013. Retrieved from: https://www.igorr.com/Documents/2013-DAEJEON/02_1016.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_1016.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13616en_AU
dc.language.isoenen_AU
dc.publisherInternational Group On Research Reactorsen_AU
dc.subjectCold neutronsen_AU
dc.subjectReactor designen_AU
dc.subjectNeutron beamsen_AU
dc.subjectOPAL Reactoren_AU
dc.subjectPlanningen_AU
dc.subjectRadiationsen_AU
dc.subjectReactor shutdownen_AU
dc.subjectThermal neutronsen_AU
dc.titleOPAL cold neutron guide in-pile replacementen_AU
dc.typeConference Paperen_AU
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