What does NCRP 102 expect regarding lead shields?

The expectation set forth by NCRP 102 concerning lead shields is that they should be designed to reduce X-ray exposure significantly, ideally to 5%. This standard takes into account both patient and personnel safety, emphasizing the importance of adequate shielding to minimize the risks associated with radiation.

In this context, the correct answer reflects the rigorous guidelines for lead shielding in environments where X-ray systems operate, ensuring that the levels of radiation that can penetrate the lead are substantially lower than the original exposure.

The choice that states lead thickness should reduce X-rays to 50% does not meet the safety and protection standards outlined in NCRP 102, as simply halving the exposure is insufficient considering the long-term effects of radiation. The option suggesting the use of 1 mm lead for all shielding is too simplistic, as different situations may require varying thicknesses based on the energy of the radiation and the specific circumstances present. Finally, stating that lead shielding is not mandatory contradicts the intent of NCRP 102, which strongly advocates for effective shielding to protect against radiation exposure.