US Nuclear: AP1000 or APR1400? Why the Contract Benefits Diverge for Hyundai E&C, Doosan Enerbility, and KEPCO E&C

Sun, 30 Aug 2026 19:53:21 +0900

US plans to build large nuclear plants are moving again. For investors in Korean nuclear stocks, however, “US nuclear expansion” as a single phrase is not enough. Which reactor type gets built – AP1000 or APR1400 – determines what work flows to Korean companies.

With AP1000, Westinghouse holds the reactor design and lead engineering. Korean companies gain access to construction and some primary component supply. With APR1400, the Korean nuclear supply chain can take on a broader share of design, primary components, and construction.

Trading Hyundai E&C, Doosan Enerbility, and KEPCO E&C in the same direction on reactor-type news is therefore a mistake. Doosan Enerbility spans both reactor types. Hyundai E&C is closest to the AP1000 projects that can currently be verified. KEPCO E&C is the most sensitive to an APR1400 selection.

One correction must come first. As of August 30, no reactor type has been officially decided for the Korea-US investment initiative. Certain media reports and brokerage scenarios have gotten ahead of the facts.

TL;DR

US government supply-chain policy for large nuclear is already moving around the AP1000. The Department of Energy has announced $17.5 billion in conditional loans to support long-lead component purchases for ten AP1000 units.
Hyundai E&C has completed the basic engineering for four AP1000 units at Fermi America. Completing the basic engineering, however, is not an EPC main contract. Nuclear licensing timelines and the project developer’s financing remain open.
Doosan Enerbility can supply both AP1000 and APR1400. Under JPMorgan’s scenario assumptions, however, its AP1000 scope centers on the reactor pressure vessel and steam generators, while its APR1400 scope covers all five major primary components – a roughly tenfold difference in assumed order value per unit.
KEPCO E&C holds the lead design and nuclear steam supply system (NSSS) engineering role on APR1400 projects. On AP1000, no comparable lead-design revenue stream has been identified, making KEPCO E&C the stock with the largest downside relative to reactor-type selection among the three.
JPMorgan’s 2029 order table is an upper-bound scenario assumption that combines two US AP1000 units and two US APR1400 units. If only one reactor type is selected for a given project, Doosan’s assumed $4.4 billion splits into either $400 million or $4.0 billion, and Hyundai E&C’s $10.4 billion splits into either $8.0 billion or $2.4 billion. US nuclear plants average roughly 44 years in age and data-center electricity demand is growing, but actual financial results require moving through equity investment, loans, licensing, long-lead component orders, and EPC contracts in sequence.

One-Sentence Verdict

Doosan Enerbility is the most comfortable way to invest in US large nuclear expansion without calling the reactor type. Hyundai E&C is the closest proxy for actual AP1000 project progress. KEPCO E&C is the play on the probability of Korean-designed nuclear entering the US market. All three are nuclear stocks, but they are not the same investment.

1. No Korea-US Nuclear Project Has Been Confirmed Yet

The starting point of the recent debate was reporting that South Korea and the United States disagree on which reactor to include in their bilateral investment initiative. The core of that reporting was that the US prefers the AP1000 while South Korea wants the APR1400 and KHNP (Korea Hydro and Nuclear Power) to lead the project.

That claim has not yet been confirmed as official fact. South Korea’s Ministry of Trade, Industry and Energy (MOTIE) issued a clarification on August 26 stating that the two governments are in discussions to identify projects but that no specific project has been decided. Specific details such as a reactor-type conflict, Westinghouse equity participation, and a joint venture structure should not be treated as confirmed decisions.

Separating what is confirmed from what is still unknown:

Category	Confirmed	Not Yet Confirmed
US policy	DOE announced $17.5 billion in conditional loans for an AP1000 supply chain covering ten units	Final investment decision and groundbreaking date for each site
Fermi project	AP1000 license application filed for four units; Hyundai E&C basic engineering complete	Hyundai E&C EPC main contract, contract value, construction start
Korea-US investment discussions	Both governments are discussing candidate projects	Target sites, reactor type, project lead, equity structure, financing structure
Korean company contracts	Doosan’s AP1000 supply history; KEPCO E&C’s APR1400 design history	Actual scope and unit pricing for this initiative

JPMorgan’s analysis should therefore be read not as an estimate of confirmed orders but as a conditional table showing which company’s workload grows depending on which reactor type is selected.

2. US Nuclear News Belongs in Three Separate Buckets

Three distinct projects are currently being conflated in the market. Separating them substantially reduces confusion.

The US Government’s Ten-Unit Plan Has Already Been Set as AP1000

On June 23, the Department of Energy announced the American Nuclear Supply Chain Loans program. The plan provides $17.5 billion in conditional loans to support long-lead component purchases for ten units across five sites, two units per site.

The reactor type here is the AP1000. Each unit is 1.1 GW. For each of the five projects, Westinghouse and the power company or energy developer must each contribute $500 million upfront before accessing the loans. Westinghouse has signed letters of intent with seven potential partners at identified sites.

Conditional loans are not the same as committed financing. Technical, legal, environmental, and financial conditions must be satisfied before funds are disbursed. Even so, the US government’s direction – to rebuild the large nuclear supply chain around the AP1000 first – is clear.

Fermi’s Four Units Are Already AP1000, But an EPC Contract Has Not Been Signed

Texas Project Matador is a large initiative combining a data center and power generation facility. The nuclear portion has already been set as four AP1000 units. This project should not be viewed as a reactor-type competition between AP1000 and APR1400.

Hyundai E&C signed a basic engineering contract with Fermi America for four units in February. According to Fermi’s Q2 SEC filing, Hyundai E&C completed the basic engineering in July. Based on that work, Fermi can estimate costs and schedule and negotiate one or more EPC contracts.

One word matters here: can negotiate, not has signed.

NRC records show that Fermi’s Combined License Application is not yet complete. The target submission date for the third application package is December 31, 2026, and the full review schedule and license decision date have not been set.

The developer’s finances also warrant attention. At the end of Q2, Fermi held $62.5 million in cash and $29.2 million in restricted cash. In July, a convertible bond issuance raised approximately $416.8 million. The Q2 filing, however, stated that without additional financing plans, Fermi lacks sufficient resources to meet its obligations over the next twelve months, raising substantial doubt about its ability to continue as a going concern. Management concluded that its financing plans can alleviate this concern, but the filing makes clear that project-level financial risk remains, separate from nuclear demand.

The Korea-US Investment Discussions Have No Decided Project or Reactor Type

This third category is the subject of JPMorgan’s scenario analysis. It is true that Korea and the US are discussing investment candidates that include nuclear projects, but as MOTIE stated officially, no specific project has been decided.

The reasons the AP1000 appears to have an advantage are the US government’s ten-unit policy, Westinghouse’s established domestic supply chain, and the operational track record of Vogtle Units 3 and 4. The APR1400 also received NRC design certification in 2019. It is a legally eligible reactor type, but there is no reference project of it being built and operated on US soil.

In January 2025, Westinghouse and KEPCO and KHNP reached a settlement ending their intellectual property dispute. This opened a path for cooperation on new overseas nuclear projects, but the settlement terms were not publicly disclosed. The settlement alone is not sufficient to calculate the scope and cost of APR1400 projects in the United States.

In short, the AP1000 aligns with current US policy and supply chain, while the APR1400 is the choice under which Korean companies can capture more design and component revenue. This difference is what separates the share-price direction of the three stocks.

3. Contract Boundaries Matter More Than the Reactor Name

A single large nuclear unit involves work from multiple companies simultaneously. Investors should focus on who holds which contract, not on the reactor brand.

Project Owner and Financing
 ↓
Reactor-Type Holder and Lead Engineering
 ↓
NSSS Engineering and Integrated Design
 ↓
Primary Components: RPV, Steam Generators, Pumps, etc.
 ↓
Civil, Structural, Installation, and Commissioning

On AP1000, Westinghouse holds the reactor design and lead engineering. Korean companies’ share depends on how much construction, manufacturing, and secondary engineering scope they can negotiate using Korean financing and supply-chain access as leverage.

On APR1400, KHNP and the KEPCO group play a larger role. KEPCO E&C handles integrated design and NSSS engineering. Doosan Enerbility supplies primary components across a broad scope. The construction contractor will most likely be determined through competitive bidding.

Reactor-type selection matters, but it alone does not determine the order value. Even with AP1000, Doosan’s share can grow if the proportion of Korean-made components increases. Even with APR1400, Hyundai E&C’s share shrinks if it loses the construction competition.

4. Doosan Enerbility Does Not Need to Call the Reactor Type

Doosan Enerbility is the only one of the three stocks with both the qualifications and the track record to supply core primary components for both reactor types.

The company manufactures key primary components for large nuclear plants, including reactor pressure vessels (RPVs), reactor internals, steam generators, reactor coolant pumps (RCPs), and pressurizers. It has experience supplying AP1000 RPVs and steam generators for projects in the United States and China. For APR1400, it has held the primary component supply chain for UAE Barakah and domestic Korean plants.

JPMorgan’s scenario assumptions for Doosan by reactor type are as follows.

Reactor Type	Doosan’s Assumed Scope (JPMorgan Scenario Assumption)	Assumed Order Value per Unit
AP1000	Centered on reactor pressure vessel and steam generators	Approximately $200 million
APR1400	All five major primary components, including RPV, steam generators, and RCPs	Approximately $2 billion

The tenfold difference in unit value is not because AP1000 is a worse project. It is because the number of components under Doosan’s scope differs. These figures are JPMorgan’s scenario assumptions, not confirmed quotes for this project.

Doosan’s largest upside is not turning AP1000 into APR1400. It is expanding the manufacturing scope that Korea holds within the AP1000 framework. If long-lead component bottlenecks are severe and Korean financing is part of the deal, Westinghouse may allocate more items to Doosan.

Conversely, qualification alone does not guarantee orders. Supplier selection, pricing, and domestic content ratios in the US government’s ten-unit bulk purchase must be confirmed by contract. Doosan is neutral on reactor type, but it is not neutral on order scope.

5. Hyundai E&C Is the Furthest Ahead on AP1000

Hyundai E&C’s US nuclear case is currently more concrete on the AP1000 side. It has actually completed the basic engineering for four Fermi units, and that work can lead to EPC negotiations.

JPMorgan’s scenario assumption is a construction contract value of approximately $4 billion per unit for Hyundai E&C on AP1000 – $8 billion for two units. The structure has Westinghouse holding the reactor type and nuclear design while Hyundai E&C becomes the primary construction partner. These are JPMorgan scenario assumptions, not confirmed contract values.

On APR1400, the issue is not that the construction scope is smaller – it is that competitive bidding applies. Even if Korea leads the project and the reactor type, the construction contract does not automatically go to Hyundai E&C. The fact that the construction partner for Czech Dukovany is Daewoo Engineering and Construction also grounds a conservative assumption here.

JPMorgan’s assumed order value for Hyundai E&C on two APR1400 units reads as approximately $2.4 billion in total – a figure that appears to apply roughly a 50% probability to winning the competitive bid. The implied expected order value therefore diverges sharply: $8.0 billion for AP1000 versus $2.4 billion for APR1400. These remain JPMorgan scenario assumptions.

Three stages must be distinguished when evaluating Hyundai E&C.

Basic engineering completion is evidence that technical and project preparation has advanced.
A preferred-bidder designation or EPC main contract is evidence that backlog has been created.
Nuclear licensing and financial close raise the probability that construction will actually begin.

What can be confirmed now is the first stage. If Fermi’s financing and licensing are delayed, the basic engineering experience remains but the market’s recognition of a major contract award is deferred. Hyundai E&C has the clearest AP1000 exposure of the three, but it is also the most directly exposed to schedule risk.

6. KEPCO E&C Is Buying the Probability of APR1400 Selection

KEPCO E&C plays a central role in integrated design and NSSS engineering for the APR1400. It participated in the design of all four UAE Barakah units and subsequent operational support, and led the APR1400’s NRC design certification process. The company’s overseas nuclear project history clearly shows where design revenue flows when the APR1400 is selected.

JPMorgan’s scenario assumption is approximately $500 million in contracts per unit for KEPCO E&C on APR1400 – $1 billion for two units. The assumption applies a higher per-unit design price than what is observed for the domestic Shin Hanul project. These are JPMorgan scenario assumptions, not confirmed contract values.

On AP1000, the situation is different. Because Westinghouse holds the reactor type and lead design, no comparable path has been identified under which KEPCO E&C would take on lead-design work of similar scale. Localization design, licensing support, and Korean component interfacing are possible roles, but public disclosures alone do not support a per-unit revenue figure close to $500 million.

Saying “AP1000 leaves no alternative” is therefore slightly too strong. The more precise statement is that lead-design revenue for KEPCO E&C on AP1000 is not yet visible. Supporting roles may emerge, but whether they would offset the loss of an APR1400 selection has not been confirmed.

KEPCO E&C’s large implied target-price upside cannot be explained by cheapness alone. The stock prices in the probability that APR1400 enters US projects and that overseas design pricing is applied. This is why it is the most sensitive of the three to reactor-type news.

7. The 2029 Order Figure Should Be Read as a Fork, Not a Sum

JPMorgan’s 2029 estimate table appears to combine two US AP1000 units and two US APR1400 units. This is useful for sensitivity analysis, but treating it as the base forecast for a single Korea-US project can inflate the order assumption.

Company	JPMorgan Combined Scenario Assumption	AP1000 Two Units Only	APR1400 Two Units Only
Doosan Enerbility	$4.4 billion	$400 million	$4.0 billion
Hyundai E&C	$10.4 billion	$8.0 billion	$2.4 billion
KEPCO E&C	Approximately $1.0 billion	Lead-design contracts unconfirmed	Approximately $1.0 billion

First, Doosan generates revenue from both reactor types, but the scale differs substantially. Calling Doosan reactor-type neutral is not the same as calling it earnings neutral.

Second, AP1000 is far more favorable for Hyundai E&C, and the Fermi basic engineering provides a real, verified link.

Third, without APR1400, the large design-contract assumption for KEPCO E&C disappears. It carries both the highest upside potential and the largest downside risk of the three.

It is logically possible for both reactor types to be built at different US sites simultaneously. The US government’s ten-unit AP1000 plan could exist alongside a separate Korea-led APR1400 project. Including both scenarios as a baseline while no specific Korea-US investment project has been decided is, however, an aggressive assumption.

8. Overseas Nuclear Carries Higher Unit Prices and Higher Risks

JPMorgan’s scenario assumptions apply overseas-project pricing for the per-unit APR1400 figures: $500 million for KEPCO E&C and $2 billion for Doosan Enerbility. The interpretation is that these are roughly twice the values observed for the domestic Shin Hanul project.

Higher overseas unit pricing does not simply mean receiving a better price. Local licensing, design changes, logistics, long-term warranties, foreign exchange, financing, and schedule-delay risk are all built into the contract. Higher revenue can mean higher profit, but profitability depends on how risk is allocated between the owner and the contractor.

The same logic applies to JPMorgan’s assumed $4 billion per unit for Hyundai E&C’s construction work. US labor and regulatory costs are high. The schedule delays and cost overruns observed at Vogtle Units 3 and 4 are a reminder that high EPC contract values for US nuclear do not automatically mean high margins.

Investors should look at the contract structure after the contract value.

Is the contract fixed-price or cost-reimbursable?
Who bears the risk of schedule delays and design changes?
Are there escalation clauses for foreign exchange and raw-material prices?
Has the project owner made its equity contribution upfront?
Has the government loan been committed?

As overseas nuclear exposure grows, revenue and earnings leverage increase. So does the risk on guarantees and working capital, at the same pace.

9. Demand Is Clear; 2029 Orders Are Still Distant

The direction in which the United States needs large nuclear again is strong.

According to the EIA, as of March 2026 the average age of commercial nuclear reactors in the United States is approximately 44 years. Operating reactors number 96 units at 57 plants, with a combined capacity of approximately 98.4 GW. Life extensions of aging facilities alone cannot fully meet growing electricity demand.

Electricity prices have also risen. The US residential electricity rate averaged 13.66 cents/kWh in 2021. The average for January through June 2026 is 18.16 cents, approximately 33% higher. April reached 18.83 cents. “19 cents” is therefore acceptable as a rounded figure for the peak month, but “37% over five years” is not a comparison of annual averages for the same period.

Data centers are pushing demand further. The EIA projects US electricity demand to grow 1.9% in 2026 and 2.5% in 2027, citing data centers as the largest single growth factor. The Texas and PJM regions face the greatest strain.

Strong demand, however, is not the same as a certain order timeline. The DOE’s own target is not “ten units completed by 2030” but “ten units under construction with a completed design.”

Actual orders becoming actual earnings requires passing through the following stages in sequence.

Stage	Evidence to Watch	Investment Significance
Candidate sites and developers	Site announcement, power off-takers, data-center demand contracts	Confirms the reality of demand
Upfront equity investment	$500 million each from Westinghouse and the developer	Confirms developer’s committed capital
Government loan commitment	Conditional commitment converts to final loan agreement	Enables long-lead component purchases
Licensing application complete	NRC application filed; review schedule set	Construction timeline becomes visible
Long-lead component orders	Purchase contracts for RPVs, steam generators, etc.	Doosan order backlog becomes visible
EPC main contract	Construction scope, price, and risk allocation disclosed	Hyundai E&C backlog recognized
Reactor-type and lead-design contract	APR1400 or AP1000 design scope confirmed	KEPCO E&C sensitivity confirmed

JPMorgan’s choice to start recognizing US nuclear orders from 2029 onward can be read not as overly conservative but as reflecting the time licensing and financing require. Even if the government’s timeline is faster, corporate earnings move on contract signing and construction-start schedules.

10. SMR Is the Same Industry but a Different Market

Small modular reactors compete with large nuclear in some contexts and complement it in others. The IAEA defines SMRs as generally 300 MW or less per unit. The AP1000 is 1.1 GW; the APR1400 is 1.4 GW.

Combining multiple 300 MW SMR units can match the output of a large nuclear plant. It is therefore too strong to say SMRs can never displace large nuclear. The per-unit output, construction method, licensing process, customer base, and component mix, however, differ substantially.

Large nuclear is better suited to large-grid power supply and replacement of aging plants. SMRs may be a better fit for smaller grids, industrial campuses, dedicated data-center power, and phased capacity additions. Commercial-scale production and standardized costs for SMRs have also not yet been sufficiently validated.

Investments in SMR developer equity or specialized SMR components and investments in large-nuclear EPC contracts should therefore not be placed in the same basket. Companies like Doosan span both markets, but order timing and unit pricing must be calculated separately.

11. EPC Contractors and Utilities Do Not Move in the Same Direction

JPMorgan’s rationale for rating Hyundai E&C, Doosan Enerbility, and KEPCO E&C as overweight while rating KEPCO as underweight also comes down to role differences.

EPC and component companies see their contract values and order backlogs grow when overseas projects materialize. Nuclear construction itself is the revenue opportunity. Utilities, by contrast, put capital in first, operate the nuclear plant, and then recover the investment through electricity sales.

When KEPCO participates in overseas nuclear, the following burdens must also be examined.

How much upfront equity and guarantees it must provide
Whether the electricity selling price covers construction and financing costs
Whether additional equity obligations arise if construction costs increase
How domestic electricity rates and policy decisions constrain its financial structure

The same nuclear positive can be a contract award for a constructor and a capital expenditure for a utility. On a day when the nuclear sector rallies broadly, individual company income statements can move in opposite directions.

12. Four Reactor-Type and Contract-Scope Combinations

Investors should look at reactor type and Korean scope of work together rather than trying to call the AP1000 versus APR1400 winner alone.

Outcome	Hyundai E&C	Doosan Enerbility	KEPCO E&C	Assessment
AP1000, large Korean scope	Largest beneficiary	Benefits; scope expansion possible	Secondary design opportunities	Strong path where US policy and Korean financing converge
AP1000, limited Korean scope	Only selected individual EPCs such as Fermi	Limited to existing two primary components	Lead-design revenue weak	Buying the sector on AP1000 selection alone risks disappointment
APR1400, Korea-led	Benefits if it wins the construction bid	Largest component beneficiary	Most direct beneficiary	Path that broadens total order value across all three companies
Project delay or financial failure	EPC recognition deferred	Long-lead component orders deferred	Design contract deferred	Demand remains but the time value of share price is eroded

Ranking the current evidence by strength:

Doosan Enerbility is the stock that participates in large nuclear expansion while avoiding the reactor-type call.
Hyundai E&C has the most concrete AP1000 link through the completed Fermi basic engineering.
KEPCO E&C has the largest order-value increase if APR1400 is selected, but also the largest gap if it is not.

Doosan is the most comfortable but the profit scale differs substantially between APR1400 and AP1000. Hyundai E&C has a real link to an actual project but still lacks a main contract. KEPCO E&C accepts the highest reactor-type selection risk, but in return receives the cleanest design revenue if APR1400 is chosen.

13. Five Lines to Confirm in the Contract, Not the Headlines

When related news appears in the future, read it in this order.

Identify which project is involved. Determine first whether it is Fermi, the DOE ten-unit program, or a separate Korea-US investment project.
Check whether the reactor type appears in official documents. Reactor-type reports without a government statement, NRC filing, or developer disclosure should be kept as scenarios.
Check Korean companies’ scope of work. Contract line items such as EPC, RPV, steam generator, and integrated design matter more than “cooperation.”
Check whether money has come in. Developer equity investment and government loan commitment come before long-lead component orders.
Check risk allocation. Fixed-price versus cost-reimbursable and schedule-delay responsibility determine profitability more than a high overseas contract value.

Doosan’s AP1000 upside, in particular, does not rest on the two words “AP1000 selected.” It rests on whether its supply scope expands from two primary components to more. Hyundai E&C requires confirmation that the basic engineering converts to an EPC main contract. KEPCO E&C requires confirmation that the APR1400 lead-design role is officially designated.

Conclusion: Buy the Contract Structure, Not the Nuclear Label

US large nuclear demand is moving beyond words alone. The AP1000 supply chain for ten units is backed by $17.5 billion in conditional loans. Fermi is progressing through licensing for four AP1000 units. Hyundai E&C has completed the basic engineering for that project. Aging plants and data-center electricity demand also support the long-term backdrop.

That does not mean all Korean nuclear stocks see improved earnings simultaneously. On AP1000, Westinghouse leads and Korea negotiates the construction and component scope. On APR1400, KEPCO E&C and Doosan Enerbility gain a wider share, and Hyundai E&C goes through competitive bidding for construction.

Doosan Enerbility is the best choice for participating without predicting the reactor type. Hyundai E&C is the closest proxy for actual progress on current US AP1000 projects. If you have strong conviction that APR1400 will enter US projects, KEPCO E&C has the greatest share-price sensitivity.

The most important caution right now is against adding JPMorgan’s AP1000 and APR1400 order values together for an undecided Korea-US project and looking only at the total. US nuclear demand is strong, but contract attribution and timing remain at a fork in the road. The contract boundary, not the nuclear brand, determines the profit.

Sources and Currency

Korea-US investment initiative undecided: MOTIE, August 26, 2026
US ten-unit AP1000 supply chain conditional loans: US Department of Energy, June 23, 2026
Fermi AP1000 four-unit licensing: US Nuclear Regulatory Commission
Hyundai E&C Fermi basic engineering and project progress: Hyundai E&C, Fermi America Q2 2026 SEC filing
AP1000 and APR1400 US design certification: US Nuclear Regulatory Commission
Westinghouse and KEPCO and KHNP dispute settlement: Westinghouse, January 16, 2025
Doosan Enerbility large nuclear primary components: Doosan Enerbility
KEPCO E&C APR1400 design history: KEPCO E&C
US nuclear plant age and electricity demand: EIA nuclear status, operating reactors and capacity, 2026-2027 electricity demand forecast
US residential electricity rates: EIA Electric Power Monthly, June 2026 data
SMR output definition: International Atomic Energy Agency

The per-company unit prices and 2029 order values attributed to JPMorgan are reconstructed from the attached scenario analysis. They are not confirmed orders or company guidance. Market and policy data are current as of August 30, 2026. The site, reactor type, project lead, equity structure, and financing structure for the Korea-US investment initiative have not been officially confirmed.

Disclaimer: For research and information purposes only. Not investment advice. Names cited are for analytical illustration; readers should perform their own due diligence and consult licensed advisors before any investment decision.

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