Tagged: Entergy Corporation

Crews are still trying to figure out exactly what caused an unplanned release of slightly radioactive water from the Palisades Nuclear Plant last week. They have discovered a new crack in a water tank that’s been leaking on and off for at least two years.

The plant was shut down a little over a week ago because of the leak.

“The risk to the plant safety was very small. There really was no increased risk,” Palisades Chief Operating Officer Tim Mitchell told reporters Monday afternoon.  

A powerful voice in Washington is demanding a permanent fix to the leaky water tank at the Palisades Nuclear Plant.

Congressman Fred Upton says he’s “outraged” by the unplanned release of slightly radioactive water into Lake Michigan over the weekend. Regulators say there is no risk to public safety.

Upton chairs the House’s Energy and Commerce Committee, which has jurisdiction over domestic nuclear regulatory activities.

The plant is in Congressman Upton’s district. Entergy, the company that owns the plant, was one of the top contributors to his election campaign last year.

Upton is demanding accountability and a permanent fix to the tank, which has leaked on and off for at least two years.

In a written statement, Upton says he plans to personally visit the site with a Nuclear Regulatory Commissioner.

“It is my understanding that the water tank will be emptied by the end of the week with the hope that the cause of the leak can be identified shortly thereafter.  Every option must be on the table – including a full replacement of the tank – to ensure that the continuing leak will not occur again,” Upton said.

Requests for an interview were not immediately returned.

New documents show Entergy had asked regulators for an alternative fix for the leaky tank on April 25th. Those documents assumed the leaks had stabilized.

“The current leak rate is stable without an increasing trend which suggests that the current through wall flaws have self-relieved the initiating stresses, are not growing, and remain well below the calculated allowable flaw length.”

The Nuclear Regulatory Commission is investigating why the leak rate went from one gallon per day late last week to 90 gallons a day in one 24-hour period.

In the documents, Entergy requests an alternative fix for the tank “that would add a fiberglass-reinforced vinyl ester liner to the tank bottom and to a portion of the tank wall in lieu of identifying the location of the thru-wallleak(s) and performing code compliant repairs.”

Update 4:14 p.m.

“The most important thing to understand regarding this shutdown is the health and safety of our employees and the public has never been impacted by this issue,” said Terry Young, Vice President of Nuclear Communications for Entergy.

He confirms the unplanned release of slightly radioactive water into Lake Michigan, but couldn’t say exactly how much.

“It’s really impossible to tell at this juncture what the length of this shutdown will be because we haven’t yet had a chance to identify what the issue is that we’re going to need to fix,” Young said.

This will be the third attempt to fix the leaky tank within the last year and a half.

“We have gone through pretty exhaustive measures on a couple of occasions to bring the plant offline and do just extensive testing and repairs and we’ll take a look at what’s causing the leak this time,” Young said.

I asked if it would make more sense to replace the tank instead.

“I really don’t know any background information on that in terms of what that would cost, I honestly couldn’t comment on that,” Young said.

Young notes the plant has had “a lot of success” at Palisades in the year and a half in “significantly improving performance.” The NRC recently upgraded the plant's safety rating after a series of problems in 2011 left it with one of the worst safety performance ratings in the country.

Last month Site Vice President Tony Vitale noted that a number of issues “have required repairs to be done with the plant offline and that’s unacceptable.” He says they’re reviewing their procedures to see if there’s something they should change.

“We’re diving into our programs and finding out why these issues are finding us instead of us finding them,” Vitale said in April.

“It is unfortunate that this is a recurrent issue that we are dealing with here,” Young said, “but our resolve is strong to fix this issue once and for all.”

Updated 1:11 p.m.

Officials from the Nuclear Regulatory Commission estimate 79 gallons of "slightly" radioactive water drained into Lake Michigan on Saturday.

NRC Spokeswoman Viktoria Mitlyng says the agency doesn’t know exactly how radioactive the water was, but based on general knowledge of where the water came from, there is no risk to public safety.

“The unplanned release of this radioactive water is not something you want to have happen,” Mitlyng added.

The water came from a large water tank on the roof of the Palisades plant’s control room. It holds 300,000 gallons of water in case of emergencies or a planned refueling outage.

The plant is located in Covert Township, about 70 miles southwest of Grand Rapids.

This week Nuclear Regulatory Commissioner William Magwood came to South Haven to tour the Palisades nuclear power plant in nearby Covert Township.

Magwood did not respond to requests to comment on how his tour went or why he chose to come.

He’s the second commissioner to visit the plant in less than a year. NRC spokeswoman Viktoria Mitlyng says that many high-level visits in such a short time is “not necessarily” uncommon.

“You can draw your own conclusions about that because I cannot do that for you,”Mitlyng said.

Kevin Kamps is with the anti-nuclear watchdog group Beyond Nuclear. Unlike the media, he and several others got a chance to sit down with Commissioner Magwood.

“There were some hints around the edges that it’s because of the problem plagued nature of Palisades and he even used the word disappointment for continued problems out there,” Kamps said.

2012 was a crazy year for the Palisades. Get a feel for it in our timeline on Palisades here.