By FRANK MUNGER, Scripps Howard News Service

OAK RIDGE, Tenn. - Radium-powered golf balls. Fishing lures that glow in the dark. Atomic potions that add pep to your step and cure all that ails you.

Who knew radiation could be so much fun?

Welcome to what may be the world's finest collection of nuclear paraphernalia, atomic doodads and just about anything having to do with the history of radiation and radioactivity.

OAK RIDGE, Tenn. - A government security contractor is investigating allegations that a security officer slept on the job at the Oak Ridge National Laboratory, one of the nation's most sensitive nuclear research sites.

KNOXVILLE, Tenn. - The dismantling of old hot cells, once used to process highly radioactive materials, has been a top priority in the government's cleanup effort at Oak Ridge National Laboratory. It's also been recognized as one of the projects with the highest potential hazards.

OAK RIDGE, Tenn. - The U.S. Nuclear Regulatory Commission has approved licenses that will allow up to 1,000 tons of Germany's low-level radioactive waste to be brought here for incineration.

OAK RIDGE, Tenn. - A highly sophisticated cyber attack -- known as Advanced Persistent Threat -- forced Oak Ridge National Laboratory to shut down all Internet access and email systems over the weekend.

Those restrictions will remain in place until lab officials and others investigating the attack are sure the situation is well controlled and manageable, Director Thom Mason said.

OAK RIDGE, Tenn. - Despite millions of dollars spent on upgrades, the 60-year-old production hub at the Y-12 nuclear weapons plant remains seismically vulnerable and could be severely damaged or disabled by a major earthquake.

OAK RIDGE, Tenn. - Some of Oak Ridge National Laboratory's best computer scientists and nuclear specialists are working long hours and weekends on computer simulations that could help in stemming the nuclear crisis in Japan.

Michael Allen has spent much of his early career studying nuclear reactor accidents of the worst kind and performing simulations to better understand how bad things happen, including core meltdowns.

OAK RIDGE, Tenn. - It's not clear whether an Oak Ridge team that specializes in medical response to radiation emergencies will be sent to Japan, but team members provided a glimpse of what the treatments could be like if there are significant radiation exposures to workers or residents.

OAK RIDGE, Tenn. - The next supercomputer coming to Oak Ridge National Laboratory will reportedly be capable of performing 20,000 trillion mathematical calculations per second -- a capability that could vault it onto the top as the world's fastest machine.