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World's First EPR™ Full Scope Simulator in Use for Operator Training Exercises at Finland's Olkiluoto 3 Nuclear Power Plant

MONTREAL, October 31, 2011

L3 MAPPS announced today that the Olkiluoto 3 (OL3) nuclear power plant full scope simulator (FSS), the first-ever FSS for an EPR™ plant, passed preliminary acceptance testing on September 9 in Olkiluoto, Finland. The September 12 ceremony marking the event was attended by the direct project client, AREVA, the owner of the plant, Teollisuuden Voima Oy (TVO), and L3 MAPPS.

In cooperation with AREVA, L3 MAPPS successfully delivered, installed and commissioned the FSS in early July 2011. AREVA is now using the FSS to support training exercises.

"We are thrilled to be part of the team that has made the very first Generation III+ plant full scope simulator operational," said Michael Chatlani, vice president of L3 MAPPS Power Systems and Simulation. "Working closely with our teammates to overcome a host of technical complexities, this achievement marks a significant breakthrough in the nuclear power plant simulation field."

During the first phase of OL3 FSS acceptance testing, a battery of tests was performed and approved covering normal operations - from cold shutdown to 100 percent full power, and from 100 percent full power to hot, intermediate and cold shutdown, as well as for mid-loop operations and core performance. In addition, numerous transient tests were successfully demonstrated.

The OL3 FSS runs on L3 MAPPS' state-of-the-art Orchid® simulation environment, which features advanced instructor station capabilities and a proven Windows-based graphical simulation environment. L3 MAPPS has supplied plant models for the reactor, thermal-hydraulic systems, conventional plant hydraulic systems and electrical systems, as well as certain instrumentation and control (I&C) systems not controlled by the digital control systems (DCS). The L3 MAPPS simulation environment is coupled with AREVA- and Siemens-supplied DCSs, replica control room panels, and a stimulated human-machine interface system. The safety system's DCS is AREVA's Teleperm XS, and the operational I&C DCS system is Siemens' SPPA-T2000 with an OM690 human-machine interface.

L3 MAPPS, a division of L3 Marine & Power Systems, has over 25 years of experience in pioneering technological advances in the marine automation field and over 35 years of experience in delivering high-fidelity power plant simulation to leading utilities worldwide. In addition, the company has more than three decades of expertise in supplying plant computer systems for Canadian heavy water reactors. L3 MAPPS also provides targeted controls and simulation solutions to the space sector. To learn more about L3 MAPPS, please visit the company's website at

Comprised of 25 operating companies, L3 Marine & Power Systems (L3 M&PS) is a worldwide leader in maritime automation and control, navigation, communications, dynamic positioning, and power distribution and conditioning for the U.S. Navy, allied foreign navies and commercial customers worldwide. With over 80 locations in 20 countries, L3 M&PS is a cohesive, global partner with extensive capabilities and a proven track record in delivering the highest level of technology, service and integration. To learn more about L3 Marine & Power Systems, please visit the company's website at

Headquartered in New York City, L3 Communications employs approximately 61,000 people worldwide and is a prime contractor in C3ISR (Command, Control, Communications, Intelligence, Surveillance and Reconnaissance) systems, aircraft modernization and maintenance, and government services. L3 is also a leading provider of a broad range of electronic systems used on military and commercial platforms. The company reported 2010 sales of $15.7 billion. To learn more about L3, please visit the company's website at

Safe Harbor Statement Under the Private Securities Litigation Reform Act of 1995

Except for historical information contained herein, the matters set forth in this news release are forward-looking statements. Statements that are predictive in nature, that depend upon or refer to events or conditions or that include words such as "expects," "anticipates," "intends," "plans," "believes," "estimates," "will," "could" and similar expressions are forward-looking statements. The forward-looking statements set forth above involve a number of risks and uncertainties that could cause actual results to differ materially from any such statement, including the risks and uncertainties discussed in the company's Safe Harbor Compliance Statement for Forward-Looking Statements included in the company's recent filings, including Forms 10-K and 10-Q, with the Securities and Exchange Commission. The forward-looking statements speak only as of the date made, and the company undertakes no obligation to update these forward-looking statements.

EPR™ is a trademark of AREVA.

Orchid is a trademark of L3 Communications MAPPS Inc. All other products are trademarks of their respective companies.