Salem 1
Refueling Outage · Day 19PSEG Nuclear·Hancocks Bridge, NJ·PWR·1,153 MWe
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Composite Operational Excellence Score (0-100) — average percentile rank across 7 dimensions in three sub-scores: Reliability (capacity factor, forced outage days, B2B avg streak), Efficiency (fuel utilization, refuel duration), and Discipline (startup duration, scram count). 5-year window. Higher = more operationally excellent. Click to see the full breakdown.
Excellence
Rank locked · 93 units
Subscribers
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Current reactor power level from the most recent NRC daily report.
0%
Power
OFFLINE (14 Days)
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Days of continuous operation since the last outage ended. Ranked against all operating units.
1
Current Run
days
#92 of 95
Bottom Quartile
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Longest recorded period of continuous operation between outages.
547
Record Run
days
#69 of 95
Mid Quartile
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Breaker-to-Breaker runs — continuous operation exceeding the cycle-adjusted threshold (455 days for this 18-month cycle unit) with no trips to 0% power.
5
B2B Runs
#47 of 86
Mid Quartile
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Lifetime capacity factor: average power level across all recorded days (100% = always at full power). Ranked against all NRC-tracked units.
88.7%
Capacity Factor
#64 of 95
Mid Quartile
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Net electricity actually generated over the most recent 12 months reported by the U.S. Energy Information Administration (Form EIA-923), summed across every unit at this plant. These are authoritative actuals, not an estimate.
19.28 TWh
Net Generation
EIA-923 · 12 mo to 2026-07 · plant total
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Total NRC-reported scram events (emergency reactor shutdowns). Ranked fleet-wide — fewer scrams = better rank.
9
Scrams
#66 of 94
Mid Quartile
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Years since commercial operation began. License remaining: 9.8 years.
49.3
Operating Age
years
9.8 yrs remaining
Excellence Score, Records & Plant Facts
B2B CHAMPION
641 days without a trip
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5 Career Runs · 1 since last trip
Champion since Aug 29, 2026
Breaker-to-Breaker Runs 5 runs
Breaker-to-breaker runs measure continuous operation between refueling outages using a cycle-adjusted threshold (90% of cycle length minus RFO duration). An active streak means the unit has been running continuously since the last refueling with no trips to 0% power.
Salem 1 has logged 5 breaker-to-breaker runs, continuous stretches from one refueling to the next with no trip to zero power. Its longest ran 517 days, and its runs average 500 days.
517
Best Run (days)
1R25 (2017-11-12) → 1R26 (2019-04-13)
500
Avg Run (days)
★ Double breaker-to-breaker
1R27 → 1R28 → 1R29
All Runs
| 2025-05-31 | 2026-10-04 | 491 days | 1R30 → 1R31 |
| 2022-05-19 | 2023-10-08 | 507 days | 1R28 → 1R29 |
| 2020-12-18 | 2022-04-09 | 477 days | 1R27 → 1R28 |
| 2017-11-12 | 2019-04-13 | 517 days | 1R25 → 1R26 |
| 2008-11-13 | 2010-04-04 | 507 days | 1R19 → 1R20 |
About This Site
Written by NukeWorker from public records: facts that do not change. Operator, status and capacity come from the live data elsewhere on this page. Sources: Wikipedia: Salem Nuclear Power Plant.
Salem Nuclear Generating Station is in Lower Alloways Creek Township, Salem County, New Jersey, on Artificial Island on the Delaware River shore, where it shares the island with the Hope Creek plant. It draws cooling water from the Delaware estuary.
Read more
The plant has two Westinghouse four-loop pressurized water reactors. Construction began on September 25, 1968. Unit 1 entered commercial operation on June 30, 1977, and Unit 2 on October 13, 1981. In the 1990s both reactors were shut down for about two years because of maintenance problems. In August 2013 the plant shut down after a leak of slightly radioactive water and resumed two days later.
Facility Statistics
Key performance and lifecycle metrics calculated from NRC operational data. Includes operating age, construction timeline, capacity factor, efficiency, generation totals, and reliability records.
Salem 1 has operated for about 49.3 years and averaged a 88.7% lifetime capacity factor, generating roughly 252.2 TWh of electricity. Its longest unbroken run reached 547 days.
Lifecycle & Tenure
Operating Age: 49.3 Yrs
Build Time: 8.8 Yrs
Lic. Remaining: 9.8 Yrs
Production & Power
Lifetime CF: 88.7%
Efficiency: 33.3%
Generated: 252.2 TWh
Reliability & Outages
Record Run: 547 Days
Refuelings: 19
Avg Startup: 5.7 Days
Ownership & Construction
The utility or company that owns and operates the facility, the architect-engineer responsible for plant design, and the primary construction contractor. Click names to view all facilities by that entity on the map.
Ownership, operation and management history
No change of owner, operator or management company on record. Our history starts in 1999.
PEG
Public Service Enterprise Group Incorporated
NYSE
$71.00
▲ +0.14 (+0.20%)
Previous Close
70.86
Day's Range
70.82 – 71.49
52-Week Range
66.15 – 87.63
Volume
3,594,013
Delayed quote as of Oct 21, 2026 4:03 PM ET.
Source: Yahoo Finance.
Full quote on Yahoo Finance
Operational Excellence Score Subscribers
Salem 1 is rated 0 to 100 on how well it actually runs, scored against every other operating reactor in the US fleet from its own operating record. Subscribers see the score, the three sub-scores behind it, and each of the seven measured inputs.
- This unit's composite score and fleet rank
- Reliability, Efficiency and Discipline sub-scores
- All seven measured inputs, with fleet percentiles
- Rank against comparable units, not just the fleet
- Three-year, five-year and lifetime windows
- Five-year trend, and every other operating US reactor
Included with every outage subscription and with NukeWorker Gold membership. Trading the outage rather than working it? The same record, cut by power market, is on NukeGryd.
Scram History 9 events since 2011
Automatic and manual reactor scram (emergency shutdown) events reported to the NRC since 2011. Includes event dates, trip type, and average recovery time. Click the title to view the full fleet scram dashboard.
Salem 1 has recorded 9 reactor scrams, or emergency shutdowns, since 2011 (4 automatic, 5 manual). On average the unit was back to full power about 9.2 days after each trip.
Technical Specs
Reactor design specifications including type (PWR/BWR), containment design, nuclear steam supply system manufacturer, thermal and electrical power ratings, and current operational status.
Reactor Type:
PWR
Containment:
PWR-DRYAMB
NSS Supplier:
WEST 4LP
Turbine Supplier:
WESTINGHOUSE ELECTRIC CORPORATION IAEA
Thermal Power:
3459 MWt
Net Capacity:
1153 MWe
Gross Capacity:
1,254 MWe IAEA
Design Capacity:
1,090 MWe IAEA
Efficiency:
33.3%
Status:
Operating
Lifetime Output:
338.9 TWh through 2025 IAEA
Licensing
NRC licensing history including docket number, license type and number, construction permit date, operating license issuance, commercial operation date, license renewal, and expiration date.
Docket #:
05000272
License #:
DPR-70
License Type:
OL-FP
Const. Permit:
1968-09-25
Construction Start:
1968-09-25 IAEA
Operating Lic:
1976-12-01
First Criticality:
1976-12-11 IAEA
Grid Connection:
1976-12-25 IAEA
Commercial Op:
1977-06-30
License Renewed:
2011-06-30
License Exp:
2036-08-13
Market & Region
EIA market and grid-region classifications: NERC reliability region, U.S. Census region, balancing authority responsible for grid operations, and whether the unit operates as a rate-regulated utility or a competitive merchant generator. Hover any value for the full name.
NERC Region:
RFC
— Reliability First Corporation
Census Region:
MAT
— Middle Atlantic
Balancing Authority:
PJM
— PJM Interconnection (ISO/RTO)
Market Structure:
Merchant
— Competitive generator selling into wholesale markets