Seabrook nuclear power plant 1
Gross capacity
1,296MW
Seabrook nuclear power plant 1 is a pressurised water reactor unit at Seabrook nuclear power plant in United States rated at 1,296 MW gross. It is operating. Commercial operation began 19 Aug 1990.
Specification
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | Westinghouse 4-loopWH 4LP (DRYAMB) in the source |
| Size | Largeabove 300 MWe |
| Coolant | Light water |
| Moderator | Light water |
| Gross capacity | 1,296MW |
| Net capacity (reference) | 1,246MW |
| Net capacity (design) | 1,149MW |
| Thermal output | 3,648MWt |
| NSSS vendor | Westinghouse Electric Companyall vendors |
| Typical enrichment | 3–5% U-235 |
Ownership & location
| Site | Seabrook nuclear power plant |
|---|---|
| Unit | 1 |
| Country | United States |
| Owner | Nextera Energy Resources LLC100% |
| Operator | Nextera Energy Resources |
| Coordinates | 42.8992, -70.8489 |
Live status
NRC daily report, unit key "Seabrook 1"
Power level
…
loading
Last 90 days
Updated daily from the US reactor status feed. The NRC publishes a power
percentage only, with no reason for a reduction, so a unit at 0% may be refuelling, in a planned
outage or tripped. See outages.
Fuel chain for this unit
Fuel form
Uranium dioxide pellets in zirconium-alloy cladding
Enrichment
3–5% U-235
Who makes this assembly
- China National Nuclear Corporation PWR fuel assemblies
- ENUSA Industrias Avanzadas PWR and BWR fuel assemblies
- Framatome PWR fuel assemblies
- KEPCO Nuclear Fuel PWR fuel assemblies
- Mitsubishi Heavy Industries PWR fuel assemblies
- Westinghouse Electric Company PWR fuel assemblies
Supply position
United States runs 63 operating units on PWR (square-lattice) fuel. 6 fabricators are documented for it. Westinghouse Electric Company is based in United States. Country exposure
Upstream
Enriched fuel means this unit sits downstream of five conversion plants and four enrichment operators holding 88% of world capacity between the top three.
Fabricator capability is recorded against reactor type and model line, not against named units,
utilities do not publish fuel contracts. See the fuel chain.
Timeline
- 7 Jul 1976Construction start
- 13 Jun 1989First criticality
- 29 May 1990Grid connection
- 19 Aug 1990Commercial operation
Other units at Seabrook nuclear power plant
| Unit | Status | Gross MW |
|---|---|---|
| Seabrook nuclear power plant 2 | Cancelled | 1,198 |
Other WH 4LP (DRYAMB) units
19 units worldwide share this model designation.
| Unit | Country | Status | Gross MW |
|---|---|---|---|
| Alvin W Vogtle nuclear power plant 1 | United States | 1,229 | |
| Alvin W Vogtle nuclear power plant 2 | United States | 1,229 | |
| Braidwood nuclear power plant 1 | United States | 1,270 | |
| Braidwood nuclear power plant 2 | United States | 1,230 | |
| Byron nuclear power plant 1 | United States | 1,242 | |
| Byron nuclear power plant 2 | United States | 1,210 | |
| Callaway nuclear power plant 1 | United States | 1,275 | |
| Comanche Peak nuclear power plant 1 | United States | 1,259 | |
| Comanche Peak nuclear power plant 2 | United States | 1,250 | |
| Diablo Canyon nuclear power plant 1 | United States | 1,197 | |
| Diablo Canyon nuclear power plant 2 | United States | 1,197 | |
| Salem nuclear power plant 1 | United States | 1,254 |
Sources
- Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release , CC BY 4.0 · retrieved 2026-09-06 · this unit last researched by GEM on 2024-05-29
- GEM.wiki entry (further reading) , CC BY-SA 4.0, linked, not quoted
How these sources are used, including the corrections applied on top of them and what is deliberately left blank · download the underlying data