The news is from Reuters (6/26/2014; emphasis is mine):
Westinghouse eyes nuclear reactor technology for higher seismic locations
Westinghouse Electric Co on Thursday announced it has begun the process of attaining regulatory approval for developing technology that would enable its AP1000 nuclear reactors to be used in locations with higher seismic activity.
The company said it started the process of obtaining approval from the U.S. Nuclear Regulatory Commission (NRC) for its 'Specialized Seismic Option' at a meeting on Wednesday.
The 'Specialized Seismic Option' being worked on by the company and its majority owner, Toshiba Corp will allow new units to be built in areas with a higher seismic spectrum seen in some portions of the western United States and other countries.
Eight units of its AP1000 reactors are being constructed worldwide, including in China and the U.S., the company said.
I guess Toshiba wants to be the one-stop total nuclear solution company - from building reactors (AP1000) to soaking up radioactive materials (SARRY, ALPS) after reactors get damaged.
Westinghouse's press release (6/26/2014) doesn't discuss the detail of this "Option", other than saying:
"...In addition, customers in more active seismic environments have expressed a strong interest in incorporating this Westinghouse technology into their energy portfolios,” said Jeff Benjamin, Westinghouse senior vice president, Nuclear Power Plants.
The US Nuclear Regulatory Commission has the non-proprietary information package submitted by Westinghouse/Toshiba on May 29, 2014, but the critical part of it (what the "Specialized Seismic Option" is) is blank (whiteout). The slide presentation says:
Target sites are select hard-rock sites west of the Mississippi River. Range also envelopes certain sites in other countries