The CSIRO says it stands by its analysis on the costs of future nuclear power plants in Australia after the Coalition attacked the work, which contradicted its claims reactors would provide cheap electricity and be available within a decade.
The opposition’s energy spokesperson, Ted O’Brien, claimed on Tuesday in the Australian newspaper that the CSIRO should re-run its modelling to account for longer life-spans and running times of nuclear generators in other countries with nuclear programs.
Last week the CSIRO released its GenCost report on the costs of different generation technologies, saying nuclear would be at least 50% more expensive than solar and wind and would not be available any sooner than 2040.
The Coalition has yet to reveal any detail on its nuclear plan, including what type of reactors it would build, how large they would be and where they would put them.
A CSIRO spokesperson told Guardian Australia: “CSIRO provides impartial and independent advice and does not undertake modelling for specific policy directions.
“While we stand by the data provided, any alternative scenarios assessed by others would not carry CSIRO’s endorsement.”
O’Brien pointed to an assumption used in the GenCost report that nuclear plants would have a “capacity factor” – how often they are generating electricity relative to their maximum capacity – of between 53% and 89%.
O’Brien wanted the CSIRO to use a higher figure of 92.7% for nuclear based on the performance of plants in the US.
But the GenCost report discusses the reasons for setting capacity factors, saying new baseload generators such as nuclear “are expected to struggle to present the lowest cost bids to the dispatch market” and would, therefore, likely be generating less often.
O’Brien also wanted the CSIRO to model the full lifespan of nuclear plants – which could be as long as 80 years – and to add a start date of 2035 to its modelling.
The report provides cost estimates for power from different generation technologies, including both large and small reactors, for the years 2023, 2030 and 2040.
The CSIRO spokesperson said: “Specific issues in regard to economic life of generation assets and capacity utilisation, including large scale nuclear, have been assessed by the GenCost team as part of the consultation process for the 2023-24 report.”
Australia has never built a nuclear reactor for electricity and the technology has been banned since 1998.
The CSIRO report said if a decision was made in 2025 to adopt nuclear power, it would be at least 15 years until a reactor was producing power.
The report said: “Nuclear technologies need to undergo more extensive safety and security permitting, nuclear prohibitions need to be removed at the state and commonwealth level and the safety authorities need to be established.”
The report estimated if Australia could establish a nuclear industry, then a 1,000MW plant would cost $8.6bn, but the first reactors could cost double that amount – more than $17bn.
The report said: “Given the lack of a development pipeline and the additional legal and safety and security steps required, the first nuclear plant in Australia will be significantly delayed. Subsequent nuclear plant could be built more quickly as part of a pipeline of plants.”
