NEC: Leak means other problems
Mar 4 - McClatchy-Tribune Regional News - Bob Audette Brattleboro
Reformer, Vt.
The discovery of a leak of tritiated water at Vermont Yankee is just one
more sign that Entergy has mismanaged the nuclear power plant in Vernon,
said Ray Shadis, technical consultant for the New England Coalition on
Nuclear Pollution.
NEC is asking the NRC to force Yankee to cease operations until the
source of the leak is found. On Wednesday, Shadis spoke before the
Nuclear Regulatory Commission's Petition Review Board to explain in more
detail the coalition's request.
"It's our view that the tritium leak is indicative of deeper issues at
the plant," he said. "During the tenure of Entergy Corporation at
Vermont Yankee, there have been several high-profile events."
Those included a transformer fire in 2004 and a cooling tower fan cell
collapse in 2007.
The reason those incidents happened, said Shadis, is because
Entergy has been deferring important maintenance tasks and has not been
applying lessons learned from other power plant operators.
In the case of the transformer fire, he said, "The warning had been out
there about the degradation of that particular item for 10 or 12 years
prior, but Entergy ... decided to ignore it," despite the increased
demand of a power uprate granted in 2003.
And Entergy could have prevented the cooling tower collapse if it had
learned the lessons of similar incidents at other electricity generating
facilities, said Shadis.
Entergy has applied to the Nuclear
Regulatory Commission to extend the operating license of Yankee for
another 20 years, from 2012 to 2032. As part of its license renewal
application, Entergy must detail its plan for how it intends to maintain
the power plant's systems, structures and components, including its
pipes.
"The leak is proof positive that the aging management program that
Entergy is proposing will not be adequate to protect against further
leaks, primarily because the ... program depends on a 10-year interval
of surveillance and such opportunistic inspections that may occur when
excavating for other purposes," said Shadis.
Shadis was also concerned that there have been "failures of
communication" between departments at Yankee. One reason for that is
because each department has its own quality control team rather than one
quality control department for the whole operation, he said.
Instituting that change "was a mistake, demonstrated by the many
failures in quality control," said Shadis.
Following 900 hours of inspections performed by an NRC engineering team
in 2004, he said, 14 items of concern were identified.
"More than half of those items related directly to poor quality
control," said Shadis.
And now, he said, poor work practices might be the root cause for the
leak of tritiated water.
The NRC issued a "demand for information" last week to review operations
at the plant over the past five years. The NRC also wants to know how
recent suspensions and reprimands may affect operations at the plant and
whether testimony submitted by the five suspended employees in Yankee's
license renewal application is correct.
The coalition is also concerned about what effect the remediation on the
contamination might have on decommissioning costs, especially, said
Shadis, "When the licensee is only marginally able to meet NRC
requirements in terms of the accumulation decommissioning funds."
To prevent further contamination of the groundwater, which could drive
up clean-up costs at the plant, the plant should be placed into cold
shutdown and all systems be depressurized until the source of the leak
is found, he said.
"They are adding to the (cost) every single minute that the leak
continues," said Shadis.
Paul Blanch, a former nuclear engineer and whistleblower who revealed
major safety lapses at Connecticut's Millstone plant in the late 1980s
and early 1990s, said that Entergy's rationale for keeping Yankee
running while it looks for the leak is simply an excuse "to get to the
finish line."
Yankee will shut down this spring for its 18-month refueling outage and
is on track to set a record run.
"The claim that we need to continue operating to identify the leak has
no engineering basis whatsoever ... it is an exaggeration," said Blanch.
"If the plant were shut down, the leak may or may not stop but the leak
rate would be significantly reduced."
Leak testing can be done after shutdown by pressurizing different
systems of the plant, he said.
Shadis did not restrict his criticism to Entergy's management of the
plant. He was also critical of the NRC's reactor oversight process,
which he said has not been adequately addressing negative trends at
nuclear power plants.
If the process was operating properly, he said, the NRC would have seen
that Entergy's maintenance has not been up to snuff, that its quality
controls have repeatedly failed and communications between departments
have not been all they could be.
The end result is structural, mechanical and human performance failures,
said Shadis.
"Even supplemental inspections have failed to pick up on the full extent
of operational and maintenance failures at Yankee," he said.
Bob Audette can be reached at raudette@reformer.com, or at 802-254-2311,
ext. 273.
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