mSvjaar

mSvjaar is a fictional term used in speculative fiction and worldbuilding to denote an annual radiation exposure threshold expressed in millisieverts per year.

The name fuses the SI unit mSv with the Dutch word jaar (year), a stylistic choice seen in fictional glossaries.

In the imagined framework, individuals or communities monitor their cumulative annual exposure and adjust behavior, infrastructure, or medical decisions to stay under the cap; reporters and policymakers debate changes to the limit.

The concept is not part of real radiological protection. Real guidelines use dose limits in millisieverts per year, with public exposure strictly regulated; typical public background exposure is around a few mSv per year, and occupational limits are higher.

In fiction, mSvjaar serves as a storytelling device to explore risk, equity, technology, and governance.

See also: radiation dose, millisievert, radiological protection.