1.   It contains a mass of radioactive byproducts spawned during its time in the reactor, some of them extremely hazardous.

2.   As long as the surrounding mass of the volcano remains intact, the radioactive byproducts remain safely contained.

3.   It is also building a facility for storing the solid radioactive byproduct until the Russian government decides what to do with it.

4.   Radioactive byproducts from those reactors would not have weapons potential.

5.   Still, opponents continued to voice fears about using public highways to transport radioactive byproducts of the US military and research nuclear programs.

6.   This low-level radioactive byproduct is valuable as a weapon because of its extreme density.

7.   The substance actually was depleted uranium hexafluoride, a radioactive byproduct of the enrichment process.

8.   Under its contract with the French reprocessing factory at La Hague, Germany this year must take back highly radioactive byproducts of reprocessing.