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October 13, 2002

 



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Regional News | Article published Sunday, October 13, 2002
Acid stains discovered on bottom of reactor
Testing being done to determine origin

BLADE STAFF AND WIRE REPORTS

OAK HARBOR, Ohio - As repairs were under way on a damaged reactor head at the Davis-Besse nuclear power plant, a contractor found acid stains on the reactor’s bottom when it was inspected for the first time, FirstEnergy Corp. said.

The Akron-based utility is testing the stains to ensure that tubes through the bottom of the reactor vessel weren’t leaking, which would mean more repairs before the plant could reopen next year.

Such leaks are "highly unlikely," company spokesman Todd Schneider said yesterday.

"We believe these stains we saw at the bottom of the reactor are related to washing the reactor head over the last several years," Mr. Schneider said. "This is the first time we’ve looked at the bottom of the reactor because the bottom has been covered in insulation."

The nearly transparent, whitish streaks containing boric acid along the sides and bottom of the reactor vessel were discovered in June.

"We’re going through practically every system in containment to make sure it’s safe and reliable when we restart. Part of that process includes inspecting the bottom nozzles of the reactor," Mr. Schneider said. "It’s very diluted. It’s almost like water spots."

The streaks could have been an early clue that acid was pooling on the head, Mr. Schneider said. Workers originally thought the acid was coming from equipment above the head.

Mr. Schneider said results of lab tests on the stains will be available later this week. He said it was too early to determine if they would cause any delay in reopening Davis-Besse.

Davis-Besse shut down for routine maintenance in February. But investigators in March found that leaking boric acid had nearly eaten through the 6-inch steel cap on the reactor vessel. The plant about 20 miles east of Toledo has been closed since then.

A new cap has been installed. But last week, FirstEnergy pushed back the projected reopening of the plant to early 2003 instead of the end of this year.

A Nuclear Regulatory Commission spokesman said it was too early to tell if the stains indicate a problem on the reactor bottom.

"There is no evidence at this point to show that they have leakage," spokesman Jan Strasma said. "I would not say the situation is serious at this point."

For earlier stories on Davis-Besse, go to www.toledoblade.com/davisbesse.


More articles on this subject »
NRC officials admit own failure with Davis-Besse plant 10/10/2002
Customers won't face rate boosts for repairs 10/08/2002
Davis-Besse restart costs soar 10/08/2002
Terrorism ruled out in nuke plant incident 10/04/2002
Man arrested with gun at nuclear plant 10/03/2002

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