Radiation Detector
Measures ionising radiation in counts or dose rate. The useful ones state which isotopes they respond to.
Scenario
The flash was the easy part.
The exchange lasted under an hour. What follows lasts a decade — the fallout, then the failure of every system that assumed a functioning country underneath it, then the winter that nobody had budgeted calories for.
What kills you
Radiation first, then the absence of everything.
Rules
The only threat here you genuinely cannot perceive without an instrument.
Measures ionising radiation in counts or dose rate. The useful ones state which isotopes they respond to.
Sealing a room is a two-hour job with this and impossible without it.
Heavy polythene for sealing openings, covering damage or making a barrier. Thickness is measured in mil.
The other half of sealing a room.
The same tape in quantity, because it is consumed faster than expected.
Two weeks indoors is roughly a hundred litres you cannot go outside for.
Bulk storage in food-grade plastic, usually 200 litres. It needs a bung wrench and somewhere structurally sound to sit.
Two weeks in a sealed room in the dark is a different disaster.
Several simple lanterns rather than one, so light can be in more than one room.
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