Table 2 Inhalation dose coefficient gInh for radionuclides of the natural decay series with values above 0.1 µSv/Bq for particles with a size of 5 μm.

From: Estimations of effective doses received from naturally occurring radioactivity in polymetallic nodules from the deep sea

Nuclide

Dose coefficient (µSv/Bq)

U-238

1.6

U-234

2.1

Th-230

28

Ra-226

2.2

Pb-210

1.1

Po-210

2.2

U-235

1.8

Pa-231

89

Ac-227

630

Th-232

12

Ra-228

1.7

Th-228

22

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