The Nuclear Reactor That went SPERT | Plainly Difficult Atomic Documentary

This video examines the U.S. government's SPERT (Special Power Excursion Reactor Test) program, a Cold War-era initiative that deliberately destroyed nuclear reactors to understand their safety limits. Unlike the BORAX experiment, which destroyed an old reactor as an opportunity, SPERT One was purpose-built from the start to be pushed past its breaking point. In a dramatic culmination on November 5, 1962, the reactor was rigged with a high-speed pneumatic rod ejector that triggered a massive self-destructive power spike, producing an 80-foot plume of coolant, bending the building's roof, and severely damaging the core. The program continued with three more reactors, each designed closer to commercial types, before being retired after four iterations. Ultimately, the episode highlights how these intentionally violent tests provided crucial data on reactor behavior under extreme failure conditions, with all technical reports made available to viewers in the pinned comments.

• ▶ 0:36 The video focuses on the USA deliberately destroying nuclear reactors in destructive tests, a topic the host has covered several times before.
• ▶ 1:06 The specific subject is the SPERT reactor destruction experiment, introduced with the channel's signature punny greeting.
• ▶ 1:27 The host thanks YouTube, Patreon, and Ko-fi supporters, then previews the episode's slightly different structure and introduces a running "SPERT count" gag.
• ▶ 1:58 The 1950s SPERT program (Special Power Excursion Reactor Test) was a bold, deliberately destructive testing effort to understand reactor safety limits by pushing reactors past their failure points.
• ▶ 3:02 SPERT originated from a U.S. Atomic Energy Commission reactor safety program, led by Argonne National Laboratory and Philips Petroleum starting around August 1954, focused on excursion studies.
• ▶ 4:04 SPERT One was constructed starting February 1955, started up in July 1955, and was designed from the start as a destructive test—unlike BORAX One, which destroyed an old reactor as an experiment of opportunity.

• ▶ 5:52 After years of experiments, officials decided to destroy SPURT One in a deliberate destructive test, modifying it with a pneumatic transient rod ejector system that could eject rods in 85 milliseconds to create a massive, self-destructive power spike.

• ▶ 6:49 The destruction event on November 5, 1962 produced a massive bang and an 80-foot plume of coolant water; the force bent the reactor building's roof upward, severely damaged the core, and left radiation levels around 25 roentgens per hour near the core.

• ▶ 8:44 While SPURT One was later used for further experiments before cleanup in the 1980s, the program continued with SPURT Two, Three, and Four—each testing transients and power spikes, with designs moving closer to commercial reactor types.

• ▶ 9:49 SPERT's primary purpose was to test reactor behavior under low water or leak conditions, before the program was retired after four iterations.
• ▶ 10:00 All technical reports are linked in the pinned comment for viewers wanting the "juicy" details.
• ▶ 10:10 The narrator corrects the "SPERT count" to 19 or 20, and invites audience agreement or feedback in the comments.

• ▶ 0:00 Introduction and Channel Support (0:00 - 2:03) - - Sets up 1950s/60s experimental nuclear technology and thanks channel supporters.
• ▶ 2:03 SPERT Program Origins, BORAX One, and SPERT One (2:03 - 5:01) - - Explains the SPERT program's safety research, BORAX One experiments, and SPERT One's construction.
• ▶ 5:01 SPURT Reactors and the Destructive Test (5:01 - 9:49) - - Describes SPURT reactor design and early experiments, the destructive test of SPURT One, and the other SPURT reactors.
• ▶ 9:49 Test Purpose, Resources, and Outro (9:49 - 11:21) - - Summarizes SPERT test purposes, references, SPERT count corrections, and channel credits.