BRIEF-Canadian Natural says Horizon operations returning to stable
May 17 (Reuters) - Canadian Natural Resources Ltd
* Says Horizon operations returning to stable conditions after minor repairs on upgrader that were unrelated to wildfires
* Says Fort McMurray wildfire continues to be a safe distance from Horizon oil sands site, air quality within acceptable limits Source text for Eikon: Further company coverage: (Reporting By Nia Williams)
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