An environmental group says the permit allowing the Vermont Yankee nuclear plant to discharge warmed water into the Connecticut River is based on flawed science. The Connecticut River Watershed Council held a news conference Wednesday to release new consultants’ reports that it said support its claims. The Vernon reactor is allowed to discharge water from the river, which has been used to cool the plant, back into the Connecticut as long as water temperatures do not exceed 85 degrees. Vermont Yankee officials said they have been staying below that limit, but the Watershed Council said the new data bring that into question . The state of Vermont is in the midst of reviewing a proposed new permit for Vermont Yankee’s warm water discharge.