How do I carry out flash radiography?

Flash radiography or pulse radiography can be carried out when information is required about the condition of the outer surface of an insulated pipe, without having to remove the insulation.

Figure 10-18 shows flash radiography in progress. Since only the aluminium cladding and insulation need to be penetrated, relatively soft radiation is applied, while exposure time is limited to only a fraction of a second. In that time sufficient “pulsed radiation” is generated to create an image on the superfast F8 + NDT 1200 (film+screen combination) see in the section about radiographic intensifying screens. It is safe to make radiographs manually without the need for additional safety arrangements.

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What effects does radiation have on the human body?