{"term":{"id":"04233","title":"nuclear graphite","longtitle":"IUPAC Gold Book - nuclear graphite","doi":"10.1351\/goldbook.N04233","code":"N04233","status":"current","definitions":[{"id":1,"text":"A polygranular graphite material for use in nuclear reactor cores consisting of graphitic carbon of very high chemical purity. High purity is needed to avoid absorption of low-energy neutrons and the production of undesirable radioactive species.","notes":{"1":"Apart from the absence of neutron-absorbing impurities, modern reactor graphites are also characterized by a high degree of graphitization and no preferred bulk orientation. Such properties increase the dimensional stability of the nuclear graphite at high temperatures and in a high flux of neutrons. The term nuclear graphite is often, but incorrectly, used for any graphite material in a nuclear reactor, even if it serves only for structural purposes."},"links":[{"term":"graphite","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/G02684"},{"term":"graphite material","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/G02687"},{"term":"graphitic carbon","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/G02689"},{"term":"graphitization","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/G02691"},{"term":"neutron","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/N04116"},{"term":"nuclear reactor","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/N04239"},{"term":"polygranular graphite","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/P04731"},{"term":"radioactive","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/R05077"}],"sources":["PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 498 (https:\/\/doi.org\/10.1351\/pac199567030473)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/N04233\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/N04233\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/N04233\/plain"},"citation":"Citation: 'nuclear graphite' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.N04233","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-04-19T04:12:37+00:00"}}