Uranium dari Air Laut Selangkah Lebih Dekat Menjadi Sumber Energi yang Layak

Rantai Peluruhan Uranium

Uranium’s energy release involves its atomic structure. Uranium atoms have large, unstable nuclei. When a neutron hits a uranium atom, it can cause the atom to split or undergo fission. This fission splits the uranium atom into two smaller atoms and releases additional neutrons plus a significant amount of energy.

Sumber: https://pubs.usgs.gov/of/2004/1050/uranium.htm

In nuclear reactors, this process is controlled. The released neutrons can strike other uranium atoms, creating a chain reaction. The heat generated from this reaction is used to heat water, producing steam which is then harnessed to drive turbines which generate electricity.

This controlled use of uranium’s fission process is the basis for nuclear power generation, harnessing the substantial energy released during the decay chain.

Masa Depan Tanpa Uranium

Although nuclear fission is currently a top option for sustainable, clean energy, it is not without its own drawbacks.  As mentioned, when fuel sources such as Uranium decay, there are resulting radioactive isotopes known as ‘fission products’.  These byproducts must then be carefully contained, for sometimes extraordinarily long periods of time, until they are no longer hazardous.  For decades, scientists have recognized this and have been hard at work to develop a superior process known as nuclear fusion.
Where nuclear fission harnesses energy from the decay of heavy elements like Uranium, nuclear fusion harnesses energy from the fusion of lighter atomic nuclei (typically deuterium + tritium = helium + a neutron).  Interestingly, this is the same process that powers stars such as the Sun.  There are various reasons that fusion is viewed as being far superior to fission.  These include,

Output Energi Lebih Tinggi: Fusion releases significantly more energy than fission.  Fusing atoms together releases nearly four million times more energy than burning coal, oil, or gas and about four times as much as nuclear fission reactions.

Sumber Bahan Bakar yang Melimpah: The primary fuels for fusion, deuterium, and tritium, are more abundant than fissile materials like uranium. Deuterium can be extracted from water, while tritium can be produced from lithium during the fusion process itself, which has terrestrial and sea-based reserves sufficient for over a thousand years.

Dampak Lingkungan Lebih Rendah: Fusion does not emit harmful greenhouse gases like CO₂. Its major by-product is helium, an inert and non-toxic gas.  Unlike fission reactors, fusion reactors produce no high-activity, long-lived nuclear waste. The materials used can potentially be recycled or reused within 100 years.

Keamanan: Fusion doesn’t have the same risks as fission reactors.  There’s no risk of a melt-down like in fission reactors, as it’s inherently difficult to maintain fusion reactions; any disturbance can cause the reaction to stop immediately.  Also, fusion doesn’t employ fissile materials like uranium or plutonium, limiting the risk of nuclear proliferation.

Although there are many hurdles left to clear until our ability to harness nuclear fusion reactions makes it a viable power source, the process has seen a resurgence in interest as of late due to various breakthroughs surrounding ignition.  For example, on various occasions, researchers have achieved a net energy gain in fusion reactions, where more energy was produced than was used to initiate the reaction​​​.

The timeline for a demonstrable fusion power plant is estimated to be around 20 years, though some startups claim it could be achieved in a decade or less.  However, these predictions are tempered by the complexities of plasma physics and the practicalities of building a functioning fusion reactor.

Overall, while nuclear fusion offers significant advantages over fission in terms of energy output, environmental impact, and safety, mastering this technology for practical, consistent energy production is still a work in progress, with an optimistic timeline of at least two decades before it becomes a viable energy source.

Perusahaan Energi Nuklir Teratas

If humans are ever going to achieve the kind of feats discussed above, it will require the concerted efforts of public and private companies alike to continue building on past achievements for generations to come.  For now, the following are examples of companies playing an early role in such feats as each advances our understanding and capabilities within the Aerospace sector.

*Angka-angka yang disajikan di bawah ini akurat pada saat penulisan dan dapat berubah.  Setiap calon investor harus memverifikasi metrik*

1. Exelon Corporation

EXC Grafik Harga

Exelon Corporation (EXC ), yang berkantor pusat di Chicago, Illinois, adalah operator pembangkit listrik tenaga nuklir terbesar di Amerika Serikat. Perusahaan ini memasok listrik kepada 10 juta pelanggan melalui 23 reaktor nuklir dan 14 pembangkit listrik tenaga nuklir. Perusahaan juga diversifikasi ke energi angin, surya, dan tenaga air.

2. NextEra Energy, Inc.

LEU Grafik Harga

Sebagai perusahaan utilitas terbesar di dunia, NextEra Energy (NEE ) memiliki pembangkit nuklir di Florida, New Hampshire, dan Wisconsin. Pembangkit ini memainkan peran penting dalam menyediakan energi yang andal dan bebas emisi, menghindari lebih dari 24 juta ton emisi karbon dioksida setiap tahun.

3. BWX Technologies, Inc.

BWXT Grafik Harga

BWX Technologies (BWXT ), sebuah perusahaan Amerika, memasok komponen nuklir, teknologi, dan bahan bakar ke pembangkit nuklir di Amerika Serikat. Perusahaan ini juga mendukung pemerintah dan entitas swasta yang mengoperasikan fasilitas nuklir. Layanannya mencakup propulsi nuklir angkatan laut, kedokteran nuklir, dan reaktor uji penelitian. Perusahaan telah terlibat dalam mendukung penyebaran reaktor modular kecil di Polandia.

Pemikiran Akhir

Perkembangan terbaru dalam ekstraksi uranium dari air laut, bersama dengan kemajuan berkelanjutan dalam penelitian fusi nuklir, berpotensi menandai fase transformatif dalam pembangkitan energi berkelanjutan. Proses memanen uranium menggunakan reaksi elektrokimia menjanjikan alternatif yang kurang mengganggu lingkungan dibandingkan penambangan tradisional, mengatasi kelangkaan uranium darat serta masalah lingkungan terkait ekstraksinya. Sementara itu, upaya fusi nuklir, dengan output energi yang superior, sumber bahan bakar yang melimpah, dampak lingkungan minimal, dan keamanan yang ditingkatkan, menjadi harapan bagi masa depan yang didukung oleh energi bersih dan hampir tak terbatas.