The limit for occupational radiation exposure among workers who deal with radioactive material is 50 millisieverts.

对于职业的处理放射性物质的工人，接触辐射的极限是50毫西韦特。

youdao

Objective To explore the effect of long term, low dose occupational radiation exposure on workers health.

目的探讨低剂量长期职业辐射对作业人员健康状况的影响。

youdao

Occupational exposure from natural radiation should be controlled, such as to underground miners and air crew.

有必要控制天然辐射产生的职业照射，如地下矿工和航空机组人员。

youdao

To put the reports coming out of Japan in perspective, the NRC limits occupational radiation exposure for adults working with radioactive material to 50, 000 microsieverts a year.

WSJ: Radiation's Effect Depends on Amount