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Hot weather and a more relaxed approach, including this Commentary – 17 interesting things about nuclear power, with pictures.

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1.  Sendai restart!

NECG #1 - Sendai

Earlier this week (on 11 August 2015), the Sendai 1 nuclear power reactor was restarted and will be the first Japanese reactor to generate power since 2013.

Another 20 Japanese nuclear power reactors are in various stages of the restart process, which requires nuclear safety regulator certification that they meet upgraded safety standards put in place after the 2011 Fukushima Dai-ichi accident.

Japan plans to bring the share of nuclear generation to 20-22 percent by 2030.

2. U.S. has the most operational nuclear power reactors

NECG #2 - Operating Reactors

Looks good for U.S. nuclear power.

But the U.S. had 104 operational power reactors until 5 of these reactors closed early and permanently in in the last few years.

Two of these, Kewaunee and Vermont Yankee, were merchant nuclear plants closed because they were losing money. More merchant nuclear plants could close soon even though they have decades of useful life remaining. See NECG Commentary #10 and Can Nuclear Succeed in Power Markets? (view article).

Meanwhile, U.S. nuclear power reactors are getting older.

3.  U.S. nuclear power plant retirements are coming

NECG #3 - Retirements

All U.S. power reactors operating today will be retired by 2055.

The chart (from NECG nuclear database) assumes that:

  • All of these power reactors get NRC approval to operate for 60 years – most have this, but 19 are waiting for approval and another 9 have not yet applied
  • All 99 of the US nuclear power reactors operating today remain in operation until the end of their NRC license (i.e., do not close earlier for economic or maintenance reasons)

Two bright spots:

  • The U.S. NRC is looking at whether these operating power reactors can safely operate for 80 years
  • 5 reactors now under construction in the U.S. will be around for longer

4.  China is building the most nuclear power reactors

NECG #4 - NECG Building

This chart (from NECG nuclear database) shows nuclear power reactors actually under construction (meaning that nuclear safety-related nuclear concrete has been poured).

In addition to having the most reactors under construction, China has another 40 power reactors that are planned reactors and about 150 that are proposed. China will enter the global power reactor market with proven Chinese reactor designs, operating reference nuclear reactors, and recent successful construction experience.

5.  Japan has world’s largest nuclear power plant



Kashiwazaki Kariwa (photo)7,965 MWJapan
Bruce6,300 MWCanada
Hanul5,881 MWSouth Korea
Hanbit5,875 MWSouth Korea
Zaporozhe5,700 MWUkraine
Gravelines5,460 MWFrance

These nuclear power plants are large because they have multiple reactors on the same power plant site. Nuclear power uses very little land per MW and uses even less land when multiple reactors are placed on the same site.

The largest U.S. operating nuclear plant is Palo Verde (3,937 MW) in Arizona. When the two new reactors at the Vogtle plant in Georgia start operating, Vogtle will become the largest U.S. nuclear plant with 4,536 MW.

6.  Ten reactors have operated more than 44 years

NECG #7 - Besnau


UnitLocationCommercial Operation DateYears
Beznau 1 (in photo)Switzerland1 Sep 196945.94
Tarapur 1India28 Oct 196945.78
Tarapur 2India28 Oct 196945.78
Oyster CreekNew Jersey, US1 Dec 196945.69
Nine Mile Point 1New York, US1 Dec 196945.69
Dresden 2Illinois, US9 Jun 197045.17
GinnaNew York, US1 Jul 197045.11
Point Beach 1Wisconsin, US21 Dec 197044.64
H.B. Robinson 2South Carolina, US7 Mar 197144.43
MonticelloMinnesota, US30 Jun 197144.11

Nuclear power is a fairly new technology. Most of the operating nuclear power plants in the world are only the second generation of operating power reactors. The new nuclear power plant designs being built today are referred to as Generation 3.

7.  Nuclear has very low greenhouse gas emissions

NECG #6 - WNA Lifecycle GHG Emmissions

This chart (from WNA) shows lifecycle greenhouse gas (GHG) emissions. Lifecycle GHG emissions account for all phases of power projects, including construction, operation, and decommissioning.

Operation of an existing nuclear power reactor produces zero GHG emissions, while most GHG emissions from combustion-based generation are during operation.

If we are serious about reducing GHG emissions, nuclear power must be included.

8.  Neighbors like nuclear power

NECG #8 - NEI Survey on Nuclear Energy

The more people know about nuclear power, the more they favor it.

9.  Uranium (nuclear fuel) has huge amount of energy

NECG #9 - PopAtomic Density

A little bit of uranium makes a lot of nuclear electricity.

10.  Nuclear produces tiny amounts of nuclear waste

NECG #10 - Energy Density Coal vs. Nuclear

Not only is nuclear fuel very dense, but used/spent nuclear fuel is also dense.  Diagram based on WNA.

The U.S. nuclear industry generates a total of about 2,000 – 2,300 metric tons of used fuel per year. Over the past four decades, the entire U.S. nuclear power industry has produced 74,258 metric tons of used nuclear fuel. If these used fuel assemblies were stacked end-to-end and side-by-side, they would cover a single football field about eight yards deep (from NEI).

11.  Nuclear power plants need a lot of skilled workers

NECG #11 - Jobs Created for Operating Energy Plants

12.  Nuclear power is safe source of electricity

NECG #12 - Deaths per TWh

Nuclear has the lowest deaths per Terawatt-hour (TWh; 1 billion kilowatt-hours) of electricity generated, based on data from Next Big Future.

13.  Floating nuclear power plants?

NECG #13 - Atlantic

Atlantic Generating Station – planned for location off the New Jersey shore (photo from Smithsonian Magazine)

NECG #13 - KLT40

Russia is building floating nuclear power plants for use on Russia’s northern coast.

14.  Civilian ships can use nuclear propulsion

NECG #14 - Savannah

This is the NS (Nuclear Ship) Savannah; the Savannah is now a museum located in Baltimore Harbor. Photo from US Government (view jpg).

15.  Navy ships use nuclear propulsion

NECG #15 - carrier

NECG 15 - submarine

U.S. Navy aircraft carriers and submarines use nuclear power – they can go very fast and very far without refueling.

16.  Nuclear propulsion is great for icebreakers

NECG #16 - icebreaker

This is the Russian icebreaker “50 Years of Victory” moving through arctic ice. You can book a trip to the North Pole on this icebreaker!

17.  Nuclear electricity powers deep space probes

NECG #17 - Pluto

Pluto viewed from NASA’s New Horizons spacecraft on July 14, 2015.

New Horizons is powered by a Plutonium 238 radioisotope thermoelectric generator developed by the U.S. Department of Energy at the Idaho National Laboratory.

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