Nuclear sources

Nuclear logs provide information, which are crucial for decision making in oil and gas industry.However, due to the nature of logs that use nuclear sources, there is always health andenvironment risks/hazards associated with them.Do a research on the protocols to reduce the 1) Health risk (storage, transportation, exposure,personnel safety,… ) 2) Environment risk (protection, stuck tools, lost tools,…).You can use as many sources as you would like