{"id":13673,"date":"2017-02-03T17:41:50","date_gmt":"2017-02-03T17:41:50","guid":{"rendered":"http:\/\/sitepourvtc.com\/?page_id=13673"},"modified":"2022-10-20T15:08:48","modified_gmt":"2022-10-20T15:08:48","slug":"fast-non-leakage-probability","status":"publish","type":"page","link":"https:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/nuclear-fission-chain-reaction\/fast-non-leakage-probability\/","title":{"rendered":"Fast Non-leakage Probability"},"content":{"rendered":"
In an infinite multiplication system, the leakage of the system is logically neglected. But all multiplying systems, all realistic reactor cores<\/a> are finite multiplying systems, and this process may not be neglected. During the slowing down process, some of the neutrons<\/a> leak out<\/strong> of the boundaries of the reactor core before they become thermalized<\/strong>. This process and its impact on the effective multiplying factor is characterized by the fast non-leakage factor, Pf<\/sub><\/strong>, which is defined as the ratio of the number of fast neutrons that do not leak from the reactor core during the slowing down process to the number of fast neutrons produced by fissions at all energies. <\/span><\/strong><\/p><\/div><\/div> 1030<\/span><\/strong><\/p>\n \u2193<\/span><\/strong><\/p>\n Pf<\/sub> ~\u00a00.95<\/span><\/strong><\/p>\n \u2193<\/span><\/strong><\/p>\n 979<\/span><\/strong><\/p>\n