{"title":"The counting, sizing and sampling of Aitken nuclei in gas-cooled reactors","authors":"W.J. Megaw, R.D. Wiffen","doi":"10.1016/0368-3230(66)90049-8","DOIUrl":null,"url":null,"abstract":"<div><p>Methods of counting and sizing Aitken nuclei are described and their application to pressurized gas-cooled reactors discussed. It is concluded that the most satisfactory instrument at present available for determining concentrations of Aitken nuclei in reactors is the Nolan-Pollak counter. A method is given of estimating the percentage release of gas-borne particulate fission products through a specified leak by measuring the rate of disappearance of particles by deposition in the reactor. A description is given of a simple pressurized sampling arrangement for obtaining samples of particles from reactors in a form suitable for electron microscopy.</p><p>The use of the Nolan-Pollak counter is further considered as a means of conducting ‘in place’ tests of high efficiency filter installations and it is concluded that the counter will be of considerable value in this application.</p></div>","PeriodicalId":100815,"journal":{"name":"Journal of Nuclear Energy. Parts A/B. Reactor Science and Technology","volume":"20 7","pages":"Pages 521-536"},"PeriodicalIF":0.0000,"publicationDate":"1966-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0368-3230(66)90049-8","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nuclear Energy. Parts A/B. Reactor Science and Technology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0368323066900498","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
Methods of counting and sizing Aitken nuclei are described and their application to pressurized gas-cooled reactors discussed. It is concluded that the most satisfactory instrument at present available for determining concentrations of Aitken nuclei in reactors is the Nolan-Pollak counter. A method is given of estimating the percentage release of gas-borne particulate fission products through a specified leak by measuring the rate of disappearance of particles by deposition in the reactor. A description is given of a simple pressurized sampling arrangement for obtaining samples of particles from reactors in a form suitable for electron microscopy.
The use of the Nolan-Pollak counter is further considered as a means of conducting ‘in place’ tests of high efficiency filter installations and it is concluded that the counter will be of considerable value in this application.
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