NEI Nuclear Notes

On March 17, Environment and Public Works Committee Chairman Barbara Boxer (D-CA) asked for a thorough review and posed a number of questions to the Nuclear Regulatory Commission on US nuclear power plants. Chairman Jaczko responded on April 8 (the pdf was posted on 4/15). Below are a few highlights from the letter: 1. Please identify all U.S. nuclear facilities subject to significant seismic activity and/or tsunamis. Although we often think of the US as having "active" and non-active" earthquake zones, earthquakes can actually happen almost anywhere. Seismologists typically separate the US into low, moderate and high seismicity zones. The NRC requires that every nuclear plant be designed for site-specific ground motions that may be expected at their locations. In addition, the NRC has specified a minimum ground motion level to which all nuclear plants must be designed. The designation of the general type of seismic zone that may apply at any specific site is ...

Nuclear disarmament took a big step forward on Monday, when the U.S. and Russia announced a new agreement on disposition of surplus plutonium. Each country had previously agreed to dispose of 34 metric tons of surplus weapons-grade plutonium by using it in mixed-oxide (plutonium-uranium) fuel, also known as MOX, but there were disagreements on how to do it. Monday's agreement notes that the U.S. will use the plutonium in light-water reactors, whereas Russia will use it in fast-spectrum reactors. The distinction may seem slight, but it had been a significant point of contention. The agreement clears the way for removing a significant amount of weapons-grade material. You might think that such news would meet with hearty and uniform approbation, but it did not, particularly at the Union of Concerned Scientists . This time, their "concern" is about the BN-600 and BN-800 reactors that the Russians plan to use. As reported by Newsday , Ed Lyman, nuclear weapons expert ...