According to the linear no-threshold model, what is the maximum radiation dose (mSv) that is without effect?

According to the linear no-threshold model, what is the maximum radiation dose (mSv) that is without effect?

• A. 0 mSv
• B. 1 mSv
• C. 10 mSv
• D. 5 mSv

Answer: (A)

In the linear no-threshold model, any amount of ionizing radiation carries some risk, with the risk increasing linearly with dose and no safe threshold. That means there is no nonzero dose that is completely without effect. The only dose with no effect is zero. So the maximum radiation dose without effect is 0 mSv. (For context, millisieverts measure effective dose. Under LNT, even very small doses carry some risk, unlike threshold or hormesis models which allow for a safe level or beneficial effects at low doses.)

In the linear no-threshold model, any amount of ionizing radiation carries some risk, with the risk increasing linearly with dose and no safe threshold. That means there is no nonzero dose that is completely without effect. The only dose with no effect is zero. So the maximum radiation dose without effect is 0 mSv.

(For context, millisieverts measure effective dose. Under LNT, even very small doses carry some risk, unlike threshold or hormesis models which allow for a safe level or beneficial effects at low doses.)