A member of the media appealed Ontario Hydro's decision to deny access to portions of a report concerning the retubing of CANDU nuclear reactors.
Hydro claimed the withheld portions contained confidential technical and commercial information supplied by Atomic Energy of Canada Limited (AECL), and were exempt under sections 17(1)(a), (b), and (c) of the Freedom of Information and Protection of Privacy Act.
The Assistant Commissioner found that while section 17(1)(b) did not apply, most of the withheld records qualified for exemption under sections 17(1)(a) and/or (c) because their disclosure could reasonably be expected to prejudice AECL's competitive position or result in undue loss.
The Assistant Commissioner also found that the public interest override in section 23 did not apply, as the information already disclosed was sufficient to satisfy the public interest in nuclear safety and cost accountability.
Hydro was ordered to disclose certain portions of the records that contained previously disclosed information, while its decision to withhold the remaining records was upheld.