Nevada officials investigating an October explosion at a long-closed radioactive waste dump northwest of Las Vegas are moving to studying how to prevent another blast.
State Public Safety Chief Jim Wright said Thursday the state fire marshal's final report that rainwater seeping into corroded 1970s-era barrels caused the explosion at the site near Beatty ends the police investigation.
Wright says state Department of Environmental Protection and Radiation Control offices now have to determine whether blame should be placed, and what corrective action is needed.
Fire Marshal Peter Mulvihill reported Wednesday to state officials that no radioactivity was detected and no injuries were reported after the Oct. 18 blast and fire.
Mulvihill's report says 55-gallon drums were blown beyond the fence-line.
The facility is on state land and is state responsibility.