For China’s nuclear industry, 2016 has been a frustrating year. So far, construction has started on only one new plant, and its target of bringing 58 gigawatts of nuclear capacity in service by 2020 seems impossible to meet.
At present, China has 19.3 gigawatts of nuclear supply under construction and a further 31.4 gigawatts already in service. Given that new plants take five years or more to build, the country faces a shortfall of more than seven gigawatts on its target.
All the plants started between 2008 and 2010 are online except for six imported reactors. These include four AP1000 reactors designed by Westinghouse, based in the USA but owned by Toshiba of Japan; and two European Pressurised Reactors (EPR), developed by Areva, a French multinational group specialising in nuclear power.
The plants are not expected to be completed before 2017 and all will be at least three years late, an unprecedented delay in China’s nuclear history.
It would be surprising if China was not disillusioned with its suppliers and their technologies.
The EPR and AP1000 reactors have been problematic to build. The two EPRs are 3-4 years late although there is little available information detailing why. Meanwhile, EPR plants in Finland and France, which should have been completed in 2009 and 2012, respectively, will not be online before 2018.
There are no obvious problems that account for the majority of the delays at any of the sites, just a series of quality and planning issues that suggest the complexity of the design makes it difficult to build.
The four AP1000s are also running 3-4 years late. They are being built by China’s State Nuclear Power Technology Company (SNPTC), which has not built reactors before. There is some publicly available information about the problems suffered in China with the AP1000s, including continual design changes by Westinghouse. The reactor coolant pumps and the squib valves, which are essential to prevent accidents, have been particularly problematic, for example.
Still, China is expected to be the first country to complete construction of AP1000 and EPR designs, a scenario it did not expect or want. The government is required to develop and demonstrate test procedures for bringing the plants into service, which could take up to a year. These test procedures are developed by vendors and generally standardised although national safety regulators must approve them and can add specific requirements.
In 2014, a senior official at China’s nuclear safety regulator, the National Nuclear Safety Administration (NNSA) complained that only a small number of test procedures had been developed for the AP1000, and no acceptance criteria had been submitted for review. He said the same issues affect the EPR.
China will likely be reluctant to commit to further AP1000s (and the CAP1400, a Chinese design modified from the AP1000) until the first of the Westinghouse designs is in service, passes its acceptance tests, and demonstrates safe, reliable operation. There are no plans to build additional EPR reactors.
In fact, state-owned China General Nuclear (CGN) and China National Nuclear Corporation (CNNC) opted instead to develop medium-sized reactors (1000 megawatts), the ACP1000 and the ACPR1000, respectively, based on Areva’s much older M310 design rather than the EPR.
The slowdown in electricity demand growth at home has left China with surplus power-generating capacity. Nuclear is now competing against coal plants supplied with cheap fuel. Furthermore, nuclear has a lower priority for dispatch in winter than combined heat and power plants, which warm homes and factories and typically burn coal and gas.
In 2015, nuclear power accounted for only 3% of China’s electricity and at any plausible rate of building nuclear plants, it is unlikely that nuclear would achieve more than 10% of China’s electricity supply.
This year, one reactor (Hongyanhe 3) in Liaoning, operated for only 987 hours in the first quarter of 2016, just 45% of its availability, while reactors in Fujian (Fuqing) and Hainan (Changjiang) were shut down temporarily.
Another challenge is the strain placed on China’s nuclear regulators in the face of such an ambitious target. The NNSA is under particular pressure to oversee the operation of 36 plants and the construction of 20 plants, as well as being the first regulatory authority to review six new designs. Not even the US Nuclear Regulatory Commission, which monitored standards during the huge build out of the industry in the 1960s and 1970s, has faced such a workload.
Safety authorities are usually reluctant to appear critical of their international peers but in 2014, a senior French safety regulator described NNSA as “overwhelmed”, and claimed that the storage of components was “not at an adequate level”. A senior official from SNPTC said in 2015: “Our fatal weakness is our management standards are not high enough.” To build up the capabilities to support such a large construction programme a pause in ordering new plants and equipment may be necessary.
The 58GW target of nuclear capacity in service by 2020 is not achievable and, like nuclear capacity targets in the past in China and elsewhere, it will be quietly revised down
. The challenge for the Chinese nuclear industry is to do what no other nuclear industry worldwide has been able to do; to bring the cost of nuclear generation down to levels at which it can compete with other forms of generation, particularly renewables.
If it is unable to do this, China cannot afford to carry on ordering nuclear plants and nuclear will retain a small proportion of the electricity mix.
This leaves China’s nuclear export drive in a precarious position. Since 2013, China has turned its attention to nuclear export markets, offering apparently strong advantages over its competitors. The Chinese government can call on all the resources of China to offer a package of equipment, construction expertise, finance and training that none of its rivals, even Russia, can match.http://reneweconomy.com.au/chinas-nuclear-roll-facing-delays-15487/