Antinuclear

Here’s why there is no nuclear option for Australia to reach net zero

Dr Alan Finkel, Guardian, 22 Mar 24

Any call to go directly from coal to nuclear is effectively a call to delay decarbonisation of our electricity system by 20 years.

The battle lines have been drawn over Australia’s energy future.

With the nation signed up to net zero emissions by 2050, the Albanese Labor government is committed to renewables. The Coalition wants nuclear.

The opposition leader, Peter Dutton, has a vision for meeting Australia’s energy needs that would include large-scale nuclear power plants and small modular reactors, a technology that is not yet proven, but which the shadow minister for energy, Ted O’Brien, says could be “up and running within a 10-year period.”

While nuclear power might experience a resurgence globally and eventually have a role in Australia, right now, no matter how much intent there might be to activate a nuclear power industry, it is difficult to envision before 2040.

The reality is there is no substitute for solar and wind power this decade and next, supported by batteries, transmission lines and peaking gas generation.

Any call to go directly from coal to nuclear is effectively a call to delay decarbonisation of our electricity system by 20 years……………………………………………………………………….

The cons

There are challenges for nuclear power in Australia, most notably timetable and cost.

Legislation. Commonwealth legislation passed by the Howard government in 1998 prohibits nuclear power. Australia is the only country in the G20 to have a legislated ban on nuclear power. This would need to be lifted before anything else could happen.

Public support. An August 2023 poll by the Resolve Political Monitor found 40% of people backed nuclear power, 33% were undecided and 27% were opposed. It is likely that no matter how small the opposition, it will be vocal.

Ramp rate. Large nuclear power generators cannot ramp up and down rapidly like batteries or peaking gas generators. This reduces their compatibility with a predominantly solar and wind powered electricity grid. It is expected, though, that small modular reactors (SMRs) will be better in this respect than large, conventional reactors.

Falling investment. The various operational, political and cost challenges faced by the nuclear industry have led to nuclear’s share of global electricity generation falling from more than 17% in 1996 to 9% in 2022.

Starting from scratch. It is unlikely that Australia would switch from being a laggard to a leader. That is, we would not proceed before we saw a licensed SMR (not a prototype) operating in the US, Canada, UK or another OECD country.

After that, we would need to beef up the regulatory system, find the first site, find and license the first operator, approve and issue construction contracts, establish a waste-management system, establish the decommissioning rules and decommissioning fund, run the environmental and safety regulatory gamut, train a workforce, respond to the inevitable protests and respond to the inevitable legal opposition all the way to the high court.

Only then could construction begin. It is difficult to imagine all this could be accomplished and provide an operational nuclear reactor in Australia before the mid 2040s.

The cost of wind versus nuclear

Coal-fired generators and nuclear power generators can dispatch electricity at full power more than 90% of the year. In practice, because demand fluctuates, the typical dispatch level from the Australian coal-fired fleet is about 60%.

For comparison, what would be the capital cost of a wind farm to dispatch 60% of the year? A simplified approach would be to ignore market economics and the variability of solar electricity in the system, and assume a 30% capacity factor for the wind energy. With these assumptions, for a windfarm to dispatch 60% of the year, we would need to install 2GW of wind turbines. The first 1GW of turbines would dispatch when the wind is blowing. The second 1GW of turbines would be used to charge a 7GW-hour (GWh) battery, to be discharged into the grid on demand.

Using figures from the CSIRO’s GenCost draft 2023-2024 report, the cost in this simplified model would be around $7bn per GW. Other, less costly, integration configurations are available. In comparison, based on the latest cost estimates for the Hinkley Point C plant under construction in the UK, the cost for nuclear power would be $27bn per GW.

The big opportunity in thinking small

In Australia, we would be looking to use SMRs because of the enormous cost and construction delays of large-scale nuclear plants. But we will want the reassurance of first seeing SMRs work safely and well in the UK, Europe, Canada, the US or another OECD country.

The trouble is, there are no SMRs operating in the UK, Europe, Canada, the US or any other OECD country. Nor are any SMRs under construction or approved in an OECD country.

There is no data to support any claims about how much SMRs will cost when deployed as operating power stations………………………………………https://www.theguardian.com/commentisfree/2024/mar/22/heres-why-there-is-no-nuclear-option-for-australia-to-reach-net-zero

March 23, 2024 - Posted by Christina Macpherson | politics