New cracks found in Crystal River plant


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Crystal River nuclear plant cracks highlight containment wall delamination, tendon retensioning issues, restart delays, safety reviews, replacement power costs, insurance claims, and Progress Energy's cautious repair strategy at the Florida facility.

 

Main Details

Concrete delamination in the Crystal River containment wall causing restart delays, costly repairs, and safety review.

  • 42-inch containment wall delaminated amid tendon retensioning work.
  • Company reports no immediate public safety risk.
  • Restart delayed again; no new startup date set.
  • About $440M spent; NEIL insurance reimbursed $181M.
  • Uncovered costs may be passed to 1.6M Florida customers.

 

Progress Energy has once again delayed restarting its Crystal River nuclear power plant north of Tampa Bay after discovering new cracks in the reactor building.

 

The good news is the company says the cracks are not a threat to public safety, despite the unfortunate timing of announcing the need for more repairs amid growing international nuclear plant concerns following Japan's crisis.

The bad news is Progress Energy has announced plans several times over the past 18 months to restart the Crystal River plant, located in Citrus County. But the company has been forced to postpone those startups due to concerns over the integrity of the 42-inch concrete wall surrounding the nuclear reactor, work that also involves Westinghouse and Shaw on other Progress projects today. The price tag in extra costs due to the long delay is approaching half a billion dollars.

The facility, Progress Energy's sole nuclear power plant in Florida, was taken offline in September 2009 for refueling and maintenance. A crack, or "delamination," discovered in the concrete wall surrounding the reactor was repaired after a detailed crack explanation by engineers. The plant was expected to begin operation next month once steel tension bands or "tendons" in the wall were carefully tightened to provide added strength to the containment building.

The containment building houses the plant's nuclear reactor, steam generators and other pumps and valves. The electrical generators are in another building. The structure is engineered to contain the rapid buildup of heat and pressure that would take place if a large pipe broke.

Signs of new cracks were found as a result of that retensioning process. No new startup date has been set, as Crystal River repairs continue under enhanced monitoring now.

"There are indications of additional delamination or separation resulting from the repair work," Progress Energy stated. "Engineers are evaluating the situation and will conduct a thorough assessment of repair options and the impact to the plant's restart plans."

"This has been a first-of-a-kind repair, and we will continue to move forward cautiously and deliberately," Progress Energy Florida CEO Vincent Dolan said in a statement.

The Crystal River nuclear plant began operating in 1977, during a period when rejection of coal was giving nuclear fresh hope in the U.S. energy debate. Progress Energy wants to extend its operation another 20 years beyond 2016, the original lifespan of the plant's 40-year license.

Broken down, Progress Energy spent $150 million for repairs as of December and another $290 million to buy the electricity that otherwise would have been generated by the plant, sums that are small compared with new-build reactor costs seen in recent projects today.

Part of those costs are covered by Progress Energy's insurance company, Nuclear Electric Insurance Limited. As of December, it had paid out $181 million to the utility. Of that, $117 million went toward buying replacement power and $64 million for repairs. Ongoing costs will raise the final price tag.

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