SL-1, an experimental boiling water reactor on the Nuclear Reactor Testing Site began producing electricity in 1958. Its purpose was to conduct research for the U.S. Army’s efforts to develop small reactors and in 1961, it exploded. Another nuclear accident occurred eight years prior near St. George, Utah. | Courtesy Joel Hiller EDITOR’S NOTE: Portions of this article were originally published on Feb. 9, 2022. It has been updated with additional information. IDAHO FALLS – If 26-year-old Navy Seabee Richard Legg and Army Specialists John Byrnes, 22, and Richard McKinley, 27, had known what was going to happen when they arrived at SL-1 for the first working day of the New Year, they might still be around to talk about it. It was Jan. 3, 1961, and America was at the height of the Cold War. The launch of Sputnik three years prior had ushered in a new era of scientific discovery while intensifying relations between the warring nations. Scientists were searching for better ways to harness the atom for nuclear power generation and for use as weapons. Idaho was one of the places where the sole focus of nuclear research and testing was on energy generation and not on weapons development. SL-1, an experimental boiling water reactor designed to conduct research for the U.S. Army, was one of several reactors on the National Reactor Testing Station, the forerunner to the Idaho National Laboratory. INL officials say SL-1 was one of 52 test reactors that had been built at the site to learn about nuclear energy for the purpose of producing energy. Unfortunately, the research wasn’t always without cost, as was the case at SL-1. On that fateful day about 40 miles outside Idaho Falls, the three military men arrived around 9 p.m. and prepared to restart the reactor after an 11-day maintenance shutdown. Curtis Smith, an INL spokesman, tells EastIdahoNews.com restarting it was a gradual process that had multiple steps in getting it to operate at full power. “At some point, (Byrnes pulled) the main control rod. (It) got moved too fast and too far (out of the reactor’s core),” Smith says. This caused SL-1 to quickly surpass full operation, setting off a chain reaction that resulted in an explosion. The blast slammed Byrnes against a concrete wall and impaled Legg against the ceiling. Both men died instantly, according to historical records from the INL. McKinley was initially knocked unconscious. Moments after the fallout, an alarm sounded and response teams arrived within minutes. “First responders initially thought nothing was wrong because the reactor building’s exterior looked normal, and there had been two false alarms tripped earlier in the day. However, upon entering the building their radiation detectors immediately indicated high radiation levels. The rescuers rotated trips inside at 65-second intervals to reduce risks to their own safety,” according to a historical fact sheet provided by the INL. Mockup of the SL-1 reactor top. Analysts tried to determine where the three cadremen were standing at the moment of the accident. | Joel Hiller The bodies of Legg and Byrnes, which were highly radioactive at that point, were found lying among the debris. Crews attended to McKinley’s wounds but he ultimately died from his injuries hours later while waiting in an ambulance for a doctor to arrive. An investigation team later determined the operator was trying to reconnect the control rod, which had a history of sticking to its drive mechanism. The rod was pulled more than 2 feet out of the reactor, more than six times the 4-inch maximum. Radiation contamination was mostly confined to the inside of the building, which meant there was no widespread impact. Only the men who were killed and those involved in the rescue attempt were exposed. No one involved in the recovery or investigation died from the contamination. The cleanup effort lasted between 10 and 18 months and SL-1 was eventually decommissioned and dismantled. The men who died in the explosion were buried in lead-lined caskets. Today, the SL-1 explosion is remembered as the only fatal nuclear reactor accident in U.S. history. “While there have been what are considered industrial fatalities at other generating stations, these are the only U.S. fatalities caused by the process of making nuclear energy,” a historical fact sheet says. The details of the accident were widely reported at the time. Local media outlets followed the story for weeks. In 2003, a journalist from Colorado Springs published a book about it, which is available online. The enclosed stairway from the SL-1 support building to the operating floor of the reactor silo. | Joel Hiller Operation Upshot-Knothole in Nevada Eight years prior to SL-1, the Atomic Energy Commission conducted another type of nuclear test about 500 miles to the south. In 1950, President Harry Truman designated 1,350-square-miles of desert landscape in southern Nevada as a site for nuclear weapons testing. This testing was completely unrelated to the nuclear energy research in Idaho. The Nevada site was 65 miles north of Las Vegas and 144 miles west of St. George, Utah. Nuclear weapons tests had been conducted on the Marshall Islands previously, but U.S. leaders wanted to continue testing on American soil because it was more cost-effective. Eleven atomic bomb detonations took place on the Nevada Test Site between March and June 1953, which is known as Operation Upshot-Knothole. Most of these detonations resulted in very little damage, but a warhead known as Harry, was “designed to do far more damage while giving off less harmful side effects,” Author Ryan Uytdewilligen says in a 2022 book detailing what happened. But that’s not how things played out. “When the bomb was detonated, a yield of 32 kilotonnes was produced — almost double what scientists were anticipating. For reference, the bomb dropped on Hiroshima, (Japan) was only 13 kilotonnes, not even half of Harry,” Uytdewilligen writes. In a conversation with EastIdahoNews.com, Uytdewilligen says the detonation occurred during a wind storm, which blew a lot of radioactive debris towards St. George. It made a lot of people sick at the time and even killed some sheep. “They were briefly concerned and they were told not to worry and that was that. They didn’t raise much of a stink trying to fight for their rights or question their safety until much later,” says Uytdewilligen. About a year later, St. George was selected as the shooting location for a Hollywood movie called “The Conqueror,” based on the life of Mongolian Emperor Genghis Khan. The filmmakers were enamored with the area’s red soil because it resembled the Gobi Desert where Khan lived. Despite widespread news of the fallout, production moved forward with little concern from the cast and crew. Locals were excited at the prospect of having movie stars in their hometown, which was likely a distraction from the worries of the day. “When they shipped everyone out there and established the sets, the crew started hearing from the locals about the nuclear tests and witnessing what happened,” says Uytdewilligen. “Suspicions were raised at that point and it was John Wayne (the star of the film) who said it would be un-American to step away from it now.” Wayne famously had a Geiger counter on set, which indicated radiation levels were off the charts. He wrote it off, saying “it must be broken,” and moved on. “The Conqueror” was released in Feb. 1956 and in the ensuing years, many of the people involved died of cancer. Uytdewilligen says it’s difficult to say whether their exposure to radiation during the film’s production was directly responsible because much of the crew, including John Wayne, were heavy smokers. Regardless of the cause, Uytdewilligen says contamination definitely played a role. More than 60,000 people in the St. George area are reported to have been impacted by the fallout. A federal program providing compensation for victims and their families was recently reinstated. It’s also been expanded to include people in Arizona, Nevada, Idaho and New Mexico. “As more research has come out, they now know that the area impacted is much greater,” Brad Hillman, a spokesman for The Radiation Exposure Screening and Education Program, says. The RESEP clinic from St. George Regional Hospital will be holding public informational meetings in several Utah cities and in Idaho Falls to talk more about it. The Idaho Falls meeting will be held at the College of Eastern Idaho on Saturday. It’s happening from 11 a.m. to noon in rooms 150 and 152 of building 6. Those who have had specific types of cancer, including leukemia, multiple myeloma, lymphomas (other than Hodgkin’s), and primary cancers of the pharynx, small intestine, salivary gland, brain, stomach, urinary bladder, colon, thyroid, pancreas, breast, esophagus, bile ducts, liver, gall bladder, lung, and ovarian, can qualify for up to $100,000. “A lot of people from that time period have passed away from these cancers or they’re in their senior citizen years,” says Hillman. “But there’s a possibility (other family members) were impacted with severe issues. This is a gift to let people know help is here.” Although the application process is free, Hillman says victims will need to include medical records, including dates the cancer was diagnosed and treated. Nuclear energy and weapons testing in the 21st century The world of nuclear testing looks much different today than it did in days prior. There’s a much greater emphasis on safety, which evolutions in technology have helped improve. When it comes to nuclear reactors, Smith says they are smaller and have better control systems with digital readouts and backup safety features to prevent accidents due to human error. The Trump Administration is focused on global dominance in nuclear weapons and energy research. AI innovation has also become a priority. In August, Texas-based Aalo Atomics ushered in what it called “the second atomic age” with the groundbreaking of the nation’s first experimental modular reactor with a nuclear reactor and AI data center. RELATED | Company breaks ground on nation’s first experimental modular reactor Nuclear weapons testing changed significantly when Congress disbanded and reorganized the Atomic Energy Commission in the 1970s. The fall of the Soviet Union in the 1980s signified the end of the Cold War and a treaty signed by a majority of countries in the early 1990s led to the demise of nuclear arms testing around the globe. RELATED | How a naval proving ground became a national lab that’s ‘changing the world’s energy future’ “The U.S. has not ratified that yet … so it could start doing nuclear tests at any moment,” says Uytdewilligen. “It’s an interesting continuation to the Cold War that we have more countries than ever with nuclear capabilities. It’s definitely not as active as it was in the ’50s, but it’s just as prevalent.”The post Federal act providing compensation for ‘downwinders’ reinstated decades after nuclear tests in Idaho and other states appeared first on East Idaho News.
Source: eastidahonews.com

Federal act providing compensation for ‘downwinders’ reinstated decades after nuclear tests in Idaho and other states
More from Business & MoneyMore posts in Business & Money »
- The time a Grammy-nominated musician spent two hours at the Snake River Animal Shelter
- Fall River Family Medicine & Urgent Care moves into new location in Rexburg
- Local Grease Monkey store celebrates 10th anniversary with big savings for customers
- After federal pause, Idaho applies to get back to work on program developing EV charging stations
- Comics, books, Christmas and trading cards: Check out the new tenants in Rexburg’s old Porter’s building
More from HealthMore posts in Health »
- AstraZeneca agrees to lower drug prices for Medicaid under Trump administration deal
- Crash may leave Rexburg 4-year-old paralyzed years after recovering from paralysis as an infant
- Fall River Family Medicine & Urgent Care moves into new location in Rexburg
- Ammon Walk & Roll to benefit ‘FSHD’ muscular dystrophy research
- Trump promotes unproven ties between Tylenol, vaccines and autism
More from IdahoMore posts in Idaho »
- Trans Idaho athlete’s request to dismiss case denied. Supreme Court could be next
- Kootenai County Sheriff’s sergeant dies in UTV crash in north-central Idaho
- Watchdog: Idaho regulators still fail to penalize youth facilities where kids are at risk
- AstraZeneca agrees to lower drug prices for Medicaid under Trump administration deal
- Woman dies when car goes off the road on Coeur d’Alene River Road
More from Idaho FallsMore posts in Idaho Falls »
More from LocalMore posts in Local »
- Compass Academy students to moderate Idaho Falls City Council and mayoral forums
- Trans Idaho athlete’s request to dismiss case denied. Supreme Court could be next
- Here’s Pocatello’s plan to bring sidewalks, sewer lines and more to southernmost neighborhoods
- Church of Jesus Christ of Latter-day Saints announces new First Presidency
- Coroner identifies man killed in Madison County crash after potato truck tips into power pole
More from Science & TechnologyMore posts in Science & Technology »
- Man returning from Yellowstone finds he won Nobel Prize, and he isn’t the only winner who found in an unusual way
- The first supermoon of the year is approaching. Here’s what to know
- New software developed by INL researchers helps hydropower plants maximize revenue, make better decisions
- Ned is a perfectly nice snail, but a rare shell means a doomed love life
- Idaho National Laboratory works with city partners to install miniature hydroelectric display
More from UtahMore posts in Utah »
- Utah man accused of leading police on chase with missing 12-year-old girl
- Church of Jesus Christ of Latter-day Saints announces new First Presidency
- AstraZeneca agrees to lower drug prices for Medicaid under Trump administration deal
- What to do if your flight is delayed or canceled during the US government shutdown
- Defendant’s DNA was found on gas can in failed arson of news vehicle in Utah, prosecutors say
Be First to Comment