AP1000 New US Fleet by Westinghouse: status and timeline

Milestones

Next · Long-lead items procurement begins

DOE announces $17.5B conditional loan commitment23 Jun 2026Complete.
Westinghouse signs Letters of Intent with utilitiesQ2 2026Complete.
Amentum partnership to strengthen AP1000 and AP3005 Aug 2026Complete.
Long-lead items procurement beginsTarget Q3 2026Not yet reached.
First units construction beginsTarget 2030Not yet reached.

Most important updates

US Department of Energy announces $17.5B in conditional loans for Westinghouse AP1000 long-lead items across up to 10 reactors and five utility partners23 Jun 2026

Upcoming

Q3 2026Long-lead items procurement begins (next)
Q1 2028First project financial close and construction start
2029Long-lead items delivery begins
2030First units construction begins

Current obstacles

Cost and schedule deliveryNuclear projects historically face cost overruns; must demonstrate reliable execution.
Supply chain scalingLarge forgings, pressure vessels and components have limited global production capacity.
DOE loan milestonesConditional financing requires meeting specified milestones and securing utility partners.

Physics limits

Thermal efficiency limitAll light water reactors, including the AP1000, are limited to roughly 33% thermal efficiency by the fundamental laws of thermodynamics; no design change can exceed this.
Reactor size manufacturing limitsAP1000 at 1200 MW is near the upper limit for manufacturing and transport.

How it works

3 parts

Design

Passive safety

AP1000 uses gravity and natural circulation for cooling, eliminating many active systems.

Financing

DOE long-lead advance purchase

$17.5B DOE financing for advance purchase of pressure vessels, steam generators and pumps.

Partnership

Shared equity with utilities

Each project jointly owned by Westinghouse and utility; each provides $500M equity.

Spec sheet

Spec	AP1000 New US Fleet
Electrical output per unit	1,200 MW^R (reported)
Planned fleet size	Up to 10 units^R (reported)
Total fleet capacity	Up to 12 GW^R (reported)
DOE conditional loan commitment	$17.5 billion^R (reported)
Equity per project	$1 billion^R (reported)
Timeline acceleration from DOE	Up to 3 years^R (reported)
AP1000 operating and contracted globally	6 operating, 11 under construction^R (reported)

^R reported by the company

Update log

1 update

Tue 23 Jun

Major: US Department of Energy announces $17.5B in conditional loans for Westinghouse AP1000 long-lead items across up to 10 reactors and five utility partnersPressFunding

About Westinghouse

The team behind AP1000 New US Fleet

Westinghouse

AP1000, AP300, nuclear reactors, APX platform, small modular reactor

Westinghouse develops the AP1000 (1200 MW) and AP300 (300 MW) reactors. US deployment backed by $17.5B DOE loans and Amentum partnerships.

Westinghouse is headquartered in Cranberry Township, Pennsylvania and is led by President and CEO Dan Sumner (appointed April 2026).
Six AP1000s operating globally; 11 under construction; selected for Poland, Ukraine and Bulgaria.
DOE committed $17.5B (June 2026) for long-lead items on up to 10 AP1000s across five utilities.

westinghousenuclear.com (opens westinghousenuclear.com)Company profile →

Founded: 1886140 yrs
Headquarters: United States
Status: Private
Valuation: private
Works in: EnergyFission
Coverage: 2 programs · 2 updateslatest 5 Aug 2026checked 10 Oct
Customers: Tennessee Valley Authority (opens tva.gov)
Partners: U.S. Department of Energy (opens energy.gov)Amentum (opens amentum.com)
People: Dan Sumner (opens info.westinghousenuclear.com)President and CEO

Spec

AP1000 New US Fleet

Electrical output per unit

1,200 MW^R (reported)

Planned fleet size

Up to 10 units^R (reported)

Total fleet capacity

Up to 12 GW^R (reported)

DOE conditional loan commitment

$17.5 billion^R (reported)

Equity per project

$1 billion^R (reported)

Timeline acceleration from DOE

Up to 3 years^R (reported)

AP1000 operating and contracted globally

6 operating, 11 under construction^R (reported)