| 2026-07-10 | Org. concerned with reactor safety |
| 2026-03-08 | Reactor safety agcy. |
| 2024-11-10 | Agcy. overseeing reactors |
| 2022-09-28 | Reactor oversight org. |
| 2018-07-20 | Government org. concerned with radioactive waste |
| 2017-12-13 | Org. concerned with reactions |
| 2017-09-12 | Org. concerned with meltdowns |
| 2016-07-03 | Fed. reactor monitor |
| 2015-07-21 | Reactor-overseeing org. |
| 2015-01-16 | Reactor overseer: Abbr. |
| 2014-06-05 | Reactor safety agcy. |
| 2012-12-21 | Atomic energy org. |
| 2012-08-26 | Reactor safety org. |
| 2012-02-15 | Reactor-overseeing org. |
| 2011-11-06 | Atomic energy oversight agcy. |
| 2011-04-09 | Org. concerned with radiation |
| 2008-11-23 | Agcy. overseeing reactor safety |
| 2008-04-10 | Creation of the Energy Reorg. Act of 1974 |
| 2008-01-05 | Reactor overseer: Abbr. |
| 2007-10-01 | Atomic energy org. |
| 2007-06-15 | Protective agcy. since 1974 |
| 2005-03-26 | Org. concerned with meltdowns |
| 2003-08-31 | A.E.C. successor |
| 1997-11-29 | A.E.C. successor |