Human and Technology Failures in Nuclear Facilities

This is interesting:

We can learn a lot about the potential for safety failures at US nuclear plants from the July 29, 2012, incident in which three religious activists broke into the supposedly impregnable Y-12 facility at Oak Ridge, Tennessee, the Fort Knox of uranium. Once there, they spilled blood and spray painted "work for peace not war" on the walls of a building housing enough uranium to build thousands of nuclear weapons. They began hammering on the building with a sledgehammer, and waited half an hour to be arrested. If an 82-year-old nun with a heart condition and two confederates old enough to be AARP members could do this, imagine what a team of determined terrorists could do.

[...]

Where some other countries often rely more on guards with guns, the United States likes to protect its nuclear facilities with a high-tech web of cameras and sensors. Under the Nunn-Lugar program, Washington has insisted that Russia adopt a similar approach to security at its own nuclear sites­ -- claiming that an American cultural preference is objectively superior. The Y-12 incident shows the problem with the American approach of automating security. At the Y-12 facility, in addition to the three fences the protestors had to cut through with wire-cutters, there were cameras and motion detectors. But we too easily forget that technology has to be maintained and watched to be effective. According to Munger, 20 percent of the Y-12 cameras were not working on the night the activists broke in. Cameras and motion detectors that had been broken for months had gone unrepaired. A security guard was chatting rather than watching the feed from a camera that did work. And guards ignored the motion detectors, which were so often set off by local wildlife that they assumed all alarms were false positives....

Instead of having government forces guard the site, the Department of Energy had hired two contractors: Wackenhut and Babcock and Wilcox. Wackenhut is now owned by the British company G4S, which also botched security for the 2012 London Olympics, forcing the British government to send 3,500 troops to provide security that the company had promised but proved unable to deliver. Private companies are, of course, driven primarily by the need to make a profit, but there are surely some operations for which profit should not be the primary consideration.

Babcock and Wilcox was supposed to maintain the security equipment at the Y-12 site, while Wackenhut provided the guards. Poor communication between the two companies was one reason sensors and cameras were not repaired. Furthermore, Babcock and Wilcox had changed the design of the plant's Highly Enriched Uranium Materials Facility, making it a more vulnerable aboveground building, in order to cut costs. And Wackenhut was planning to lay off 70 guards at Y-12, also to cut costs.

There's an important lesson here. Security is a combination of people, process, and technology. All three have to be working in order for security to work.

Slashdot thread.