AECL provides update on NRU activities

    CHALK RIVER, ON, Sept. 9 /CNW/ - The following information bulletin is in
accordance with Atomic Energy of Canada Limited's (AECL) ongoing commitment to
voluntary public disclosure of events related to the Chalk River Laboratories

    Data analysis continues on Phase II and III of the Non Destructive
Examinations (NDE). Phase II included scans of the entire vessel circumference
and Phase III included five vertical scans from the bottom to the top of the
interior wall of the vessel. One additional vertical scan is planned.
    Efforts remain focused on completing fabrication and assembly of the
repair tooling. The first of several remote welding tools has been assembled
and is undergoing testing. A team of AECL employees has relocated to the
manufacturer's facility to work with the vendor's engineering and welding
experts on tool development and train on the use of the tool.
    Testing of the repair processes and tools will continue using the full
height NRU mock-ups.
    Guidance on the duration of the shutdown continues to be founded on the
best evidence available, including the most up-to-date analysis of the
inspection data, progress on repair strategies, and critical path requirements
for restart after an extended shutdown. At this time, the application of the
band weld build-up technique, and the number of identified repair sites,
indicates the NRU will return to service during the first calendar quarter of
2010. Further guidance on a return to service date will be provided when more
information becomes available.
    Evidence collected to date continues to support AECL's view that the
necessary vessel repairs can be made and that NRU will be returned to service
    AECL continues to work closely with the Canadian Nuclear Safety
Commission (CNSC) and CNSC safety inspectors continue to provide independent
regulatory oversight of AECL's activities at the Chalk River Site.
    There is no threat to workers, the public, the environment or nuclear
safety related to this event.

    More information on the return to service of NRU is available at, including two new video status updates by AECL's Gina
Strati, Manager of Mechanical Equipment Development and Ian Muir, Manager of
Reactor Chemistry and Corrosion. The videos provide insight on AECL's
innovative tool development activities and the science of corrosion analysis
at the atomic level.

For further information:

For further information: Dale Coffin, Director, Corporate
Communications, Atomic Energy of Canada Limited, 1-866-886-2325

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