Europe’s aging reactors: increasing safety and cost problems

With exposure to radiation, high temperatures and pressure, the components of nuclear plants take a battering over time. “They can, for example, become more brittle, susceptible to cracking or less able to cope with temperature extremes,” said Anthony Froggatt, senior research fellow at London-based thinktank Chatham House.

Insight: The cost of caring for Europe’s elderly nuclear plants LONDON (Reuters)
18 Aug 14, – Europe’s ageing nuclear fleet will undergo more prolonged outages over the next few years, reducing the reliability of power supply and costing plant operators many millions of dollars.

Nuclear power provides about a third of the European Union’s electricity generation, but the 28-nation bloc’s 131 reactors are well past their prime, with an average age of 30 years.

And the energy companies, already feeling the pinch from falling energy prices and weak demand, want to extend the life of their plants into the 2020s, to put off the drain of funding new builds…….

as nuclear plants age, performance can suffer, and outages – both scheduled and unplanned – rise.

With nuclear safety in the spotlight since the 2011 reactor meltdown at Japan’s Fukushima plant – which in turn prompted Germany to call time on its entire nuclear fleet – operators can take no chances with their elderly plants, but the outages get longer and more difficult.

“These reactors were designed over 30 years ago. The people involved are either retired or dead, and most of the companies involved no longer exist,” said John Large, an independent nuclear engineer and analyst who has carried out work for Britain’s Atomic Energy Authority.

Jean Tandonnet, EDF Group’s nuclear safety inspector, said in January that its French fleet last year had a series of “problematic unit outages”, and scheduled outages were extended by an average of more than 26 days. Regular maintenance and major equipment replacement jobs had increased by 60 percent in the last six years, he said. France is the EU’s nuclear leader, its 58 reactors producing nearly three quarters of the country’s electricity. France’s nuclear watchdog will make a final decision on whether to extend the life of the French fleet to 50 years in 2018 or 2019. EDF has estimated the extension would cost 55 billion euros.

“The average age of the (French) reactors is now about 30 years, which raises questions about the investment needed to enable them to continue operating, as ageing reactors increasingly need parts to be replaced,” according to the World Nuclear Industry Status report 2014.

SAFETY FIRST

Though the EU has conducted risk and safety tests on the bloc’s nuclear plants, environmental campaigners say the tests failed to address risks associated with ageing technology, among other things.

“While this can be monitored, it can be problematic if ageing occurs at a greater rate than anticipated or it occurs in areas which are difficult to access or monitor,” he added.

As reactors age, there is also a risk of finding a generic design flaw that could affect all the reactors in a country if they are of the same design. ………..Additional reporting by Barbara Lewis in Brussels and Geert de Clercq in Paris; Editing by Will Waterman) http://www.firstpost.com/world/insight-the-cost-of-caring-for-europes-elderly-nuclear-plants-1668443.html