Work completed to connect Pump No.104 to NRU's seismically qualified EPS



    CHALK RIVER, ON, Feb. 4 /CNW/ - Connection and commissioning of the
seismically qualified Emergency Power System (EPS) DC motor starter for pump
No.104 has been completed on Atomic Energy of Canada Limited's NRU reactor.
Work was completed during a regularly scheduled maintenance outage from
January 27 to February 1. NRU resumed operation on Saturday, February 2 at
12:40 a.m.
    The connection of the seismically qualified DC motor starter to pump
No.104 completes the work authorized under Bill C-38. When the legislation was
passed on December 12, 2007, EPS was in the process of being connected to pump
No.105. The work on pump No.105 was completed safely on December 14, and the
reactor was restarted on December 16. AECL kept the federal government, the
CNSC and local community stakeholders informed of its progress throughout the
process of completing the work.
    "All of us at AECL are committed to the safe and reliable operation of
the NRU reactor," says AECL's Senior Vice-President and Chief Nuclear Officer
Brian McGee. "We are proud of NRU's 50 year track record for safe and reliable
operation and confident that with the completion of this work, NRU is safer
now than it has ever been. I want to thank the employees who worked so
diligently and professionally to safely complete the procurement of parts,
connection of equipment and commissioning of the EPS."

    About NRU

    The NRU reactor is a 135 MW thermal research reactor that entered service
in 1957. The fuel in the reactor is cooled by eight pumps that are powered
from the electrical grid. In addition, four of the pumps have an independent
backup power supply from diesel generators on site. These pumps also have (DC)
motor backups powered by battery.
    The Emergency Power System, or EPS, is an additional power system that is
qualified to withstand severe seismic activity. EPS is designed to provide
additional backup power to two of the coolant pumps, pumps 104 and 105. Either
one of these two pumps provides sufficient cooling flow when the reactor is
shut down.

    About AECL

    Atomic Energy of Canada Limited is a full service nuclear technology
company providing services to nuclear utilities around the world. Established
in 1952, AECL is the designer and builder of CANDU technology including the
CANDU 6, one of the world's top-performing reactors. AECL's 4,800 employees
deliver cutting edge nuclear services, R&D support, design, and engineering,
construction management, specialized technology, refurbishment, waste
management and decommissioning in support of CANDU reactor products. More
information on AECL and CANDU technology can be found at www.aecl.ca.





For further information:

For further information: Dale Coffin, Director, Corporate
Communications, AECL (Atomic Energy of Canada Ltd), T: (905) 403-7457

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