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Jaczko has been a member of the NRC since 2005 and was named by President Barack Obama to lead the independent agency in 2009. Since then, he has made a series of decisions to delay or halt work on a proposed nuclear waste dump at Nevada’s Yucca Mountain, a project Obama had made a campaign promise to kill. Reid is the project’s leading opponent in Congress.

Obama last month named geologist Allison Macfarlane to replace Jaczko. A Senate confirmation vote on her nomination is expected this week.

The report found several instances in which Jaczko altered or deleted staff recommendations before they were submitted to the full commission, a departure from previous NRC chairs who left the recommendations intact and expressed any disagreement in writing.

On the bullying allegation, the report said “no one interviewed said they would hesitate to bring a safety matter to the chairman’s attention,” but said Jaczko sometimes tried to intimidate them “to side with the chairman’s opinion despite their own judgments.”