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Entergy : Failing Bolts at Second Indian Point Reactor Raise Further Safety Concerns By CLIFF WEATHERS

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04/22/2017 | 05:38am CEST

Failing Bolts at Second Indian Point Reactor Raise Further Safety Concerns

Inspection at Unit 3 Finds 256 of 832 Critical Reactor Core Bolts Impaired; Result is Even Worse Than at Unit 2

Riverkeeper Demands NRC Issue an Incident Report and Supply a Root Cause Analysis for Clustered Bolt Failures

BUCHANAN, NY - April 22, 2017 - A little more than a year after an inspection of the Indian Point nuclear plant's Unit 2 reactor found an unprecedented number of "reactor core baffle bolts" to be either missing or impaired, an inspection of Unit 3 has found an even higher number of these critical bolts impaired at that reactor. Those bolts are being replaced while the reactor remains shut down for refueling.

Entergy last week announced that at least 256 of the 832 bolts that keep the inner plates of the reactor core from coming apart were impaired at Unit 3, degraded by the high levels of radiation inside the reactor. In addition, Entergy said three bolts could not be tested and 11 others were replaced. The condition of those 11 bolts is currently unclear. In all, Entergy says 270 bolts, roughly a third, will be replaced.

The purpose of the reactor plates is to direct cooling water through the fuel assemblies and allow control rods to be inserted into the reactor in order to safely shut down the plant. In 2016, after 227 of the 832 bolts holding together this critical structure inside the Unit 2 reactor were found to be either degraded or missing, Riverkeeper registered its objection that the Nuclear Regulatory Commission allowed Indian Point Unit 3 to operate without determining whether bolts in that reactor were similarly degraded and in need of replacement. The NRC is obligated to provide adequate assurance of safety at this troubled plant.

"By deciding to delay the inspection of Unit 3 until the current scheduled refueling outage, the NRC played a dangerous game," Riverkeeper President Paul Gallay said. "Entergy claimed that the bolts at Unit 3 were less prone to degradation. That claim has proved to be false. There was simply no assurance that Unit 3 was safe once the serious issues with the baffle bolts became clear. The results of the current inspection confirm that - as we demanded when the degraded Unit 2 bolts were discovered - Unit 3 should have been shut down immediately for inspection. NRC gambled with public safety by allowing Unit 3 to operate uninspected for another year."

The extremely large number of failed bolts found in the Unit 3 reactor raises questions regarding the reliability of Entergy's plant safety prognosis. The discovery indicates, in retrospect, that Unit 3 was operating under "unanalyzed conditions," and was in danger of being unsafe to operate.

Riverkeeper demands that the NRC issue an incident report regarding the missing bolts in the Unit 3 Reactor to ensure that the reactors do not again operate without adequate assurance of safety. The organization is also asking the NRC to conduct and provide to the public a root cause analysis to determine what led to such a high rate of failure and why Entergy's predictions about the bolts were so wrong.

Through an agreement between Governor Andrew M. Cuomo's administration, New York State Attorney General Eric Schneiderman, Entergy and Riverkeeper, Indian Point's Unit 2 and Unit 3 reactors are scheduled to close in 2020 and 2021, respectively.

"The state had the foresight to strike the right deal at the right time to protect the health and welfare of the 20 million people who live and work within 50 miles of Indian Point," said Gallay. "As part of the closure agreement, Entergy agreed to annual inspections by state-designated representatives on issues pertaining to continued operation of its reactors through 2021. This recent revelation further signifies the importance of continued and more rigorous inspections of this aging, increasingly unreliable nuclear plant."

"It's becoming obvious that the troubles of both reactors are the result of a shared, integral design flaw coupled with inadequate inspection and maintenance. The consequences of this flaw just cannot be overstated," said Gallay. "These problems aren't going away because the plant is scheduled to shut down. It's incumbent on the NRC to ensure the safe operation of the plant over the next four years of operation and for the decades of decommissioning that will follow.

"Outside of the damage found at Unit 2 last year, the amount of deterioration found in the reactor's bolts is unprecedented. No other nuclear plant in the U.S. has come close to this disturbing level of disrepair," said Gallay. "These bolts perform a critical safety and operational function. The failure of a few bolts is considered manageable, but the significant loss we've seen at both reactors is disturbing, as it could cause a lack of structural stability in the reactor if the bolts fail."

What havoc can these damaged bolts create? Loose pieces may cause damage to critical components such as fuel rods, valves, and control rods inside the reactor. Degraded bolts can lead to damage to the core structure and eventually the fuel. Here's one scenario: If degraded bolts allow the core baffle and former plates to separate, makeup water supplied to the reactor vessel by the emergency core cooling systems could flow through these openings instead of flowing through the reactor core. If enough makeup flow bypasses the reactor core, the nuclear fuel will overheat and become damaged. The result: lots of radioactive material is released from the damaged fuel rods and out of the reactor vessel through the ruptured pipe.

"Immediately upon learning about the alarming problems with the Unit 2 reactor in March 2016, Riverkeeper called for Unit 3 reactor to also close for inspection," said Gallay. "The reactors are virtually identical: They're a few years apart in age and have similar operational histories. By the standard set by other federal regulatory agencies, the NRC should have done more than just audit the structural problems present at the Unit 2's reactor. There should have been an immediate inspection of the bolts in the Unit 3 reactor."

###

Riverkeeper is a member-supported watchdog organization dedicated to defending the Hudson River and its tributaries and protecting the drinking water supply of nine million New York City and Hudson Valley residents. For more than 50 years, Riverkeeper has helped to establish globally recognized standards for waterway and watershed protection and serves as the model for the growing Waterkeeper movement that includes more than 300 Keeper programs around the globe. Visit us at riverkeeper.org.

SOURCE: Cliff Weathers, Riverkeeper Inc. Communications Director .

© Copyright © 2017 Yonkers Tribune, All rights reserved., source Newspapers

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Financials ($)
Sales 2017 11 206 M
EBIT 2017 2 007 M
Net income 2017 765 M
Debt 2017 16 186 M
Yield 2017 4,62%
P/E ratio 2017 16,70
P/E ratio 2018 15,96
EV / Sales 2017 2,67x
EV / Sales 2018 2,76x
Capitalization 13 766 M
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