Tom Konrad, CFA
If the Japanese use less nuclear
power, what will take its place?
I'm astounded by the resilience and discipline of the Japanese people
in response to the three-pronged earthquake, tsunami, and nuclear
disaster, perhaps in large part by my cultural roots in the
egocentric United States, where we seem to have forgotten the
virtue of self-sacrifice for the greater good.
Yet while Japanese society has shown itself to be particularly
resilient, the Japanese electric grid is much less resilient.
According to
International
Energy
Agency
statistics, Japan produced 258 TWh of electricity
from nuclear in 2008, or 24% of total production.
The situation seems to be mostly stabilized at the
Fukushima
Daiichi
reactor
complex, but according to the March 23rd
update on the reactor
status at Fukushima from the Japan Atomic Industrial Forum,
Reactors 1, 2, 3, and 4 have all suffered damage, had their fuel
rods exposed for some period, and/or had seawater pumped in for
cooling. It seems unlikely that any of these reactors, with
a 2.8GW total generation capacity will ever be returned to
service. Assuming that these reactors normally operate at a 90%
capacity factor, these four reactors would have accounted for an annual
electricity production of approximately 22 TWh, or 2.5% of total
production.
At the very least, these 22 annual TWh will need to be replaced with
other sources or by improved energy efficiency, and the disaster will
likely shift Japan (and much of the rest of the world) slowly away from
nuclear power, with fewer new plants built, and fewer old ones being
granted extensions in their permits to operate.
Outside Japan, regulators are likely to require additional safeguards
on new nuclear generators, as well as be more strict when
considering
the
extension of operating permits for existing older plants.
This will increase the already high cost of nuclear power, and further
slow the construction of new plants.
Energy efficiency, conservation, and other forms of energy generation
will have to fill the gap. Which will benefit most?
The Conversation So Far
Over the last few weeks, I have read innumerable prognostications about
how Japan and the rest of the world will fill the energy gap. I
asked several clean energy money managers for their
top
post-Fukushima
stock
picks, which are published on my
Green Stocks blog at
Forbes. I also posted a
quick
poll to see what sectors readers thought would benefit (see chart.)
Opinion is strongly divided, especially among my poll respondents,
perhaps in part because I allowed respondents to vote for as many as
three sectors, since I'm fairly confident that more than one sector
will benefit.
Perhaps the most vocal contingent is the group that is arguing that
solar will benefit. Two of the green money managers I asked for
stock picks chose
solar
stocks (
MEMC
Electronic
Materials
[WFR] and
LDK
Solar [LDK].) Among the pundits, AltEnergyStocks' solar
expert
Joe
McCabe
was
quick to see benefit for solar.
Yet even our own bloggers can't agree. A few days after McCabe's
post, our battery expert
John
Peterson
wrote,
The nuclear reactors that have recently
gone off-line in Japan and
Germany accounted for roughly 125 TWh of electricity production last
year. In comparison,
global
electricity
production
from wind and solar power
in 2009 was 269 TWh and 21 TWh, respectively. In other words, we just
lost base-load power that represents 43% of the world’s renewable
electricity output. The gap cannot possibly be filled by new wind and
solar power facilities.
John thinks oil, natural gas, and coal are the only energy technologies
able to take up the slack.
John
Segrich, manager of the
Gabelli
SRI Green Growth Fund (SRIGX) also
told
me "
The big
beneficiary in the aftermath of the Japan nuclear crisis will be
natural gas related companies." (His stock pick is
Capstone
Turbine
(CPST), because the company's microturbines can provide
immediate, clean, and efficient distributed generation.
Market Reaction
The market seems to think solar, natural gas, and wind will all
benefit. While the natural gas exchange traded notes (ETNs)
are based on baskets of commodity futures, while the solar and wind
exchange traded funds (ETFs) are baskets of stocks, the gains in all
three over the 10 days following the crisis are surprisingly similar
(see chart.)
Can the solar bulls and the natural gas bulls both be right?
Yes. As John Petersen pointed out, the amount of nuclear power
going offline is large compared to the current installations of
renewable energy. Hence, if renewable energy were to fill only
part of this gap, it would still amount to significant industry growth,
while leaving a lot of room for growth in fossil fuels.
Linear vs. Geometric Growth
However, I fell John is far too dismissive of the growth potential of
renewable energy, while he completely neglects the potential of energy
efficiency to fill part of the gap.
First, he compares the nuclear generating capacity going off-line to
current installations of renewable energy, noting that it is half of
current installed capacity. If renewable energy were on a linear
growth curve, such a comparison would be valid. However,
renewable energy installation has often grown exponentially in the
past, and can still do so. While it takes ten years or more to
permit and build a nuclear reactor, utility scale wind and solar farms
are typically built in three to 18 months.
Between 2004 and 2009, grid connected PV capacity
increased at an
average annual rate of 60%. Over the same period, wind
installations grew at the relatively leisurely but still impressive
compound annual rate of 26% (see chart.)
If we assume that combined wind and solar capacity continue to grow at
a (slower) annual 25% rate, then replacing 43% of the world's current
renewable output will take all of 19 months. Replacing that
capacity with nuclear or coal would take much longer, because nuclear
and coal plants take so long to construct.
Variability
While Petersen's critique of renewable energy installation rates are
not supported by the facts, his later points regarding wind and solar
variability are salient. He points out that energy storage
is currently well suited to smoothing minute-to-minute variation, an
important function because it greatly reduced the strain on the rest of
the electric grid. He is also correct that batteries cannot
cost-effectively provide the tens of hours of storage that a wind or
solar facility would need to mimic a baseload or dispatchable resource.
Geographic Dispersion
Perhaps because Petersen is a battery expert, he missed
non-storage
solutions
to
the variable output from wind and solar farms.
The most important of these is geographic dispersion. Geographic
dispersion in solar and wind is akin to diversification in a financial
portfolio, but much more effective because of much lower correlation in
electricity generation, and because correlation falls with distance.
First, wind and solar power tend to be negatively correlated simply
because, in most locations, wind tends to be strongest when the sun is
weak (early morning, late evening, during storms, and at
night.) In finance, there are very few negatively
correlated asset classes, and those assets that are negatively
correlated with the market tend to produce minuscule or negative
returns, which would be the equivalent of an electrical load in the
grid analogy.
Hence, there are great benefits in diversification, and long distance
transmission is the key to supplying these benefits. This idea is
backed up by numerous
studies demonstrating the benefits of geographic diversification,
and also widely acknowledged by experts in the field, as I discussed in
a
recent
article on
ABB Ltd. (ABB).
While geographic dispersion cannot produce baseload power, baseload
power was always an artificial construct in the first place. An
ideal power source would produce power that corresponds to demand:
Electricity production would fall at night and peak on hot sunny
afternoons (as it does from geographically dispersed solar arrays), not
stay at a constant rate.
The Japanese Grid
For such a small country, the
Japanese
grid
is
not well interconnected. The Northeast and West
of the country operate at different frequencies, and are connected only
by two relatively low capacity frequency converter facilities.
This is a large part of the reason that Tokyo (in the Northeast, as are
Sendai and Fukushima) is suffered rolling blackouts after the quake:
the relatively unaffected West was unable to supply the Northeast
with significant electricity through these two weak links.
In order to benefit from the geographic dispersion which makes high
wind and solar penetrations practical, Japan will need a more robust
electric grid. It would be an incredibly daunting task to build
significant new transmission in densely populated Japan, if it were not
for a state of the art technology ideally suited to both transmitting
large amounts of electricity over long distances with low line losses,
and for
running those links underwater. This technology is High
Voltage DC (HVDC) transmission.
Japan currently has two underwater DC links, and the two frequency
conversion stations using similar technology. These facilities
were
built in the late 1900s, with technology provided by Japanese
companies such as Mitsubishi. The leading providers of modern
HVDC are
ABB
Ltd.
(ABB) and
Siemens
(SI), two companies that might stand to benefit if the Japanese
decide to learn the lessons of the Sendai/Fukushima tragedy and build a
more resilient grid based on strong links and safe, diversified
electricity generation.
The First Fuel
Wind, solar, natural gas, and new grid links will take at least a
year or three to replace the lost generation at Fukushima, and in the
meantime, there is only one energy resource that can take up the
slack. That is energy efficiency and conservation, often called
the
first
fuel because it is the least expensive resource available.
Japan is already a leader in energy efficiency, but the discipline with
which they are handling the disaster convinces me that they are ready
to "renew their commitment to energy efficiency," as Nobel Prize
winning economist
Joesph
Stiglitz
said
in a March 19th interview with Barrons.
Deployment and grid stability of energy efficiency and conservation can
be enhanced with the use of smart grid technology.
Smart
grid
technology (such as demand response) can also aid in the
integration
of
variable
resources such as wind.
Filling the Gap
Much depends on how Japan decides to rebuild, but whatever they do
their priorities will probably be:
- Quick to deploy
- Low cost
- Improve grid safety and stability
- Not greatly increase reliance on foreign imports
Energy
Efficiency meets all four goals
. Many energy
efficiency stocks are local operations,
but suppliers of
highly
energy
efficient
components, such as Power Integrations (
POWI)
should
be
well placed to benefit. Investors' focus should be on
companies with industry-leading technology that the Japanese will not
be able to source locally.
Wind is quick to
deploy and inexpensive when compared to natural gas generation
based on expensive liquified natural gas (LNG), but there will be a
limited number of sites
available in densely populated Japan. Most likely, we will see an
acceleration of
Japanese
plans
for
offshore wind power. This should help wind
companies with offshore turbines, and possibly integrate nicely with a
build-out of a Japanese underwater HVDC grid, similar to the proposed
Atlantic Wind Connection
for the US.
An
underwater HVDC grid
makes sense, and if Japan sees this sense, ABB and Siemens are the most
logical beneficiaries.
Solar power is not
cheap, although it is much less expensive and faster to deploy than new
nuclear power, and the high prices of imported LNG should not make it
cost prohibitive as a solution. Global suppliers of PV should all
benefit, as the increase in demand allows them to charge somewhat
higher margins than they would otherwise.
Grid Based
Energy Storage
will need to increase along with wind and solar to help accommodate
local fluctuations in power output, but it is easy to overestimate the
market for this. It's typically not low cost, but grid based
storage (at least when it takes the form of batteries) is quick to
deploy, improves grid safety and stability, and does not greatly
increase the
reliance on foreign imports. Petersen just published a
good
overview
of grid based storage applications here, including the
US-listed stocks he thinks are well positioned for this
opportunity. One Japanese company he does not mention is
NGK
Insulators Ltd. (NGKIF.PK), a vendor of the Sodium sulfur
batteries, the technology which currently has the greatest installed
capacity for battery-based grid storage. This was my
top
pick
for a stock to benefit from the rebuilding of the Japanese grid.
It might make sense to build some grid based storage at the sites of
existing Japanese nuclear reactors. When the grid and back-up
generation gave out at Fukushima, the
battery
backup
kept the plants safe for 8 hours. Grid based storage
systems cycle their state of charge over time, so if a future disaster
knocked out both grid power and backup generators at a nuclear plant
co-located with grid based battery storage, most of the time the grid
based storage would be able to supply some extra power to the nuclear
plant, and keep the cooling systems operating longer than it could with
dedicated battery backup alone.
Natural gas will also
see a boost, especially in the short term, now
that Japan must run existing gas fired generation harder to make up for
the loss of the nuclear plants. In the longer term, suppliers of
gas turbines will probably see some increase in demand. Given the
high price of LNG, there will be an emphasis on particularly efficient
means of converting natural gas into electricity. Segrich's
Capstone
Turbine
(CPST) is one, especially when used in combined heat and
power operations. For even more efficient conversion of natural
gas to electricity, the Japanese may turn to solid-oxide fuel cells,
such as those sold by
FuelCell
Energy
(FCEL). Both these companies' products can be used in natural gas
powered buses, and so
may
benefit
if bus buyers shift away from diesel in favor of natural gas.
Geothermal Power has,
as usual, received some lip service as a possible beneficiary.
Japan is on the ring of fire, with good geothermal potential. The
country already had
547MW
of
installed geothermal generation in 2000. Geothermal also
has the advantage of being baseload, often operating with capacity
factors of 95%, even higher than nuclear.
However, geothermal plants take four to six years to construct, which
means that new geothermal (unless it involved installing upgraded
turbines or bottoming cycles at existing plants) will only make a small
contribution to fill the gap left by lost nuclear generation in the
near term. Companies that might possibly benefit in the short
term are
vendors
of
binary cycle turbines (i.e.
Ormat (ORA)
and
United
Technologies
(UTX)) to be used as bottoming cycles at existing
plants.
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