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Pink Poppy Flowers
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Reactor PROFILE

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Episode:
58
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SM-1 Army PWR

Country:

USA

Years of Operation:

1957-1973

Category:

Research & Experimental

Reactor Type:

PWR

Coolant:

Light Water

Fuel Type:

Enriched Uranium

Moderator:

Light Water

Thermal Power (MWth):

20

Electrical Power (MWe):

20

Status:

Research & Experimental

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timeline

First Criticality Year

1957

Commercial Op Year

1957

Shutdown Year

1973

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Lessons Learned

1. Nuclear Success Usually Looks Boring

The safest and most effective reactors rarely become famous. SM-1 proved that

disciplined operations, good procedures, and trained operators matter far more than

flashy technology claims.

2. Training Culture Is a Reactor Technology

SM-1 demonstrated that operational discipline and human performance are foundational

technologies in nuclear power — every bit as important as pumps, fuel, and control

rods.

3. Small Reactors Still Face Big Logistics Realities

SM-1 worked technically, but economics and infrastructure eventually overtook the

mission. Even successful reactors must compete against changing logistical and

commercial realities.

sources

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ARTICLE

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SLIDE DECK

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Related Reactors

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