Radiation shielding sheet

A radiation shielding paper sheet comprising:

• paper formed of a blended material including:
• pulp fibers as main fibers to form the paper and respectively having hydrophilic portions, and
• granular radiation shielding material particles mixed with the pulp fibers, the blended material integrally formed in a sheet shape, wherein
• an average particle size of the granular radiation shielding material particles is 7.6 to 40 micrometers,
• a first amount, by weight, of the granular radiation shielding material particles in the radiation shielding paper sheet is larger than a second amount, by weight, of the pulp fibers in the radiation shielding paper sheet,
• the first amount, by weight, of the granular radiation shielding material particles is a largest amount, by weight, in the radiation shielding paper sheet,
• the second amount, by weight, of the pulp fibers as the main fibers to form the paper is a second largest amount, by weight, in the radiation shielding paper sheet,
• a sum of the first amount and the second amount exceeds 99% of the radiation shielding paper sheet by weight, and
• the granular radiation shielding material particles comprises at least one selected from a tungsten and an oxide of tungsten.