WASHINGTON—U.S. nuclear officials and Dominion Resources Inc. are working to determine whether Dominion’s North Anna nuclear-power plant in central Virginia was built to withstand the ground motion it sustained Tuesday after a magnitude-5.8 earthquake struck nearby Mineral, Va.
The analysis of North Anna will determine whether the ground motion at the plant Tuesday exceeded the levels the plant was built to withstand.
[box_dark]The ground below North Anna is a mix of soil and rock, so there are two standards.
The rock part of the site is built to withstand the equivalent of a magnitude 5.9 quake.
The soil part of the site, meanwhile, is built to withstand a magnitude 6.2 quake.
The plant is likely to have “extra margins built into the design,” NRC spokesman Scott Burnell. So “the real-world performance” could be better than those levels.
“We’re still evaluating the information that’s coming in regarding the epicenter and the strength of the quake and all of the instrumentation that’s at North Anna,” Mr. Burnell said. “We’re determining what sort of forces North Anna dealt with.”
The NRC is determining whether to send a formal team of inspectors to the North Anna plant.
- North Anna Update: Nuclear Power Plant Still Without Power – Venting Steam (enformable.com)
- BREAKING: 5.9 Earthquake Strikes Near 7th most At-Risk Nuclear Power Station for Earthquake Damage – If foreshock, then worse is yet to come (enformable.com)
- Nuclear reactors at quake-hit Virginia nuke plant are “sitting on a fault line” (enenews.com)
- North Anna Nuclear Power Station Restores Off-Site Power – Still No Word On Restart of Reactor (enformable.com)
- Strange: Spokesman says workers at Virginia nuke plant were preparing to manually shut down reactors after quake when system went into automatic shut down – Another spokesman says “it was a manual shutdown” (enenews.com)