Extreme Engineering - Inside Chernobyl's Mega Tomb. VOICE MAN MONITORING ARCH OUTSIDE: For the south, 383. The hastily built sarcophagus covering the reactor could collapse at any moment. Some of these, pass through the reactor walls and stream out into the surrounding space. NARRATOR: Today, in the heart of Ukraine, an extraordinary race is underway, to construct a one-and-a-half-billion dollar megadome. SIMON EVANS (Chernobyl Shelter Fund): These are the world's most uncomfortable boots. NARRATOR: The World Health Organization estimates that more than 2,000 liquidators have died, or will die, as a result of the radiation they received. The entire new structure has been designed to … Like other areas inside the zone, it will remain uninhabitable for hundreds of years. Unfortunately, we will not be able to renew it once the arch will be in the final position, because the radiation conditions at that location are too severe for a painter. In spring, 2012, workers start to assemble the steel tubing that will form the giant skeleton of the arch. People described how it had a funny taste and a strange odour. Episode guide, trailer, review, preview, cast list and where to stream it on demand, on catch up and download. In this National Geographic special we see archaeologist Allan Maca, an exper, Black Wednesday occurred on 16 September 1992, it was a day that saw the British government faced one of the biggest financial crisis in history, it was a day when the Bank of England lost billi, In 1985 Los Angeles would be terrorized by a series of brutal sexual assaults and murders. NICOLAS CAILLE: It must last 100 years. I saw a documentary a few years ago, I think it was posted on Reddit, and I think it was fan-made but I'm not sure. Stream Inside Chernobyl's Mega Tomb free online. DAVID DRISCOLL: There's a lot more activity, because we now have many more tasks to complete, all in the same period. Geert-Jan Thijssen leads the team that will move the arch. Inside Chernobyl’s Mega Tomb joins a captivating roster of programming from the BAFTA and Emmy award-winning Windfall Films. NARRATOR: They're battling freezing weather and lethal radiation, in a desperate race to build Chernobyl's MegaTomb, right now, on NOVA. Powerful fans will pull in air from outside, channel it through massive dehumidifiers to remove moisture, then blow the dried air along two miles of aluminum ducts, into every corner of the enclosed space. NARRATOR: Even when its roof is complete, the arch will be far from finished. NARRATOR: There's another challenge that makes this already complex project even tougher, the lack of time. Some only had 45 seconds to perform their task, before their dose of radiation became too great. NARRATOR: Once the shelter has been moved into position over the old reactor, this crane, yet to be fitted with its robotic arm, will start dismantling the ruins of the Chernobyl reactor. It was a lie. Every day, every hour, every minute, it was improvisation. So, you can understand that if you are going further from the reactor, the dose rates are lower. Twice a day. In 1986, in the heart of Ukraine, the Chernobyl nuclear reactor exploded, releasing 400 times more radiation than the Hiroshima Bomb. The arch-shaped New Safe Confinement (NSC) structure, also known as the “Mega Tomb,” will cover the concrete and steel sarcophagus now encasing the radioactive Chernobyl disaster site. If the sarcophagus collapses before the arch is in place, the fallout would contaminate the arch and the whole worksite. Two and a half years after construction began, it's late fall, and engineers are anxious to entirely cover the shelter's enormous roof before the winter storms hit. PRODUCED AND DIRECTED BY Martin Gorst EXECUTIVE PRODUCER Carlo Massarella EDITED BY Paul Shepard NARRATOR Eric Meyers LOCATION FILMING Peter Fison Justin Ingham Roshan Samarasinghe Mat Stimpson LOCATION DIRECTORS Alex Tate Gwyn Williams FIXERS Dmytro Kolchynsky Anatolii Kuksa Taras Shumeyko ASSISTANT PRODUCERS Emma Houghton-Brown Katie Reisz PRODUCTION MANAGERS Mel Moore Vicky Newman Sara Revell Pete Youens GRAPHICS Fluid Pictures ONLINE EDITORS Paul Goodman Barrie Pease COLORISTS Vicki Matich Paul Fallon AUDIO MIX Andy Hodges Bob Jackson EDIT ASSISTANT Philip Michael ARCHIVAL MATERIAL AP EBRD / Novarka IRSN Kaleidoscope KBJR Metro News 6 Sergei Koshelev Telecon Videoplugger SPECIAL THANKS Bechtel Professor Stuart Burgess ChNPP Laurin Dodd European Bank for Reconstruction & Development Dr. Alan Flowers Mac McNeil Mammoet FOR WINDFALL FILMS HEAD OF PRODUCTION Birte Pedersen HEAD OF DEVELOPMENT Leesa Rumley PRODUCTION ACCOUNTANT Sue Harvard NOVA SERIES GRAPHICS yU + co. NOVA THEME MUSIC Walter Werzowa John Luker Musikvergnuegen, Inc. ADDITIONAL NOVA THEME MUSIC Ray Loring Rob Morsberger CLOSED CAPTIONING The Caption Center POST PRODUCTION ONLINE EDITOR Spencer Gentry DIRECTOR OF PUBLIC RELATIONS Jennifer Welsh PUBLICITY Eileen Campion Eddie Ward RESEARCH Ana Aceves SENIOR SCIENCE RESEARCHER Caitlin Saks NOVA ADMINISTRATOR Anne Barleon PRODUCTION COORDINATOR Linda Callahan DIRECTOR OF NATIONAL AUDIENCE RESEARCH Cory Allen PARALEGAL Sarah Erlandson TALENT RELATIONS Janice Flood LEGAL COUNSEL Susan Rosen DIGITAL MANAGING PRODUCER Kristine Allington SENIOR DIGITAL EDITOR Tim De Chant DIRECTOR OF DIGITAL MEDIA Lauren Aguirre RIGHTS MANAGER Lauren Miller POST PRODUCTION COORDINATOR Brittany Flynn SUPERVISING PRODUCER Kevin Young POST PRODUCTION EDITOR Michael H. Amundson BROADCAST MANAGER Nathan Gunner BUSINESS MANAGER Ariam McCrary DEVELOPMENT PRODUCER David Condon PROJECT DIRECTOR Pamela Rosenstein COORDINATING PRODUCER Elizabeth Benjes SENIOR SCIENCE EDITOR Evan Hadingham SENIOR PRODUCER Chris Schmidt SENIOR SERIES PRODUCER Melanie Wallace DIRECTOR, BUSINESS OPERATIONS & FINANCE Laurie Cahalane DEPUTY EXECUTIVE PRODUCER Julia Cort SENIOR EXECUTIVE PRODUCER Paula S. Apsell, A NOVA production by Windfall Films Ltd. (part of the Argonon Group) for NOVA/WGBH Boston in association with the BBC, and France Television, NHK, and N24. BAPTISTE BRIOIS: Apparently, we have a little problem with the strand carousel. For the winter period, we can lose three months, four months of the year. The reactor design was flawed, and the test caused it to run out of control, resulting in a massive steam explosion. NICOLAS CAILLE: There is two rebar that are touching the arch. Even as they built it, engineers knew its days were numbered. Today in Ukraine an international team of engineers is racing to assemble one of the most complex super structures ever built, at an extraordinary 36,000 tones it will be the largest structure moved on land. To push the arch, engineers will fit each leg with hydraulic pistons. On one, they will attach a giant telescopic tube equipped with a robotic arm. Four-and-a-half years after work began, to build the 40,000-ton shelter, the day finally arrives when the team will attempt to slide it over the reactor. It's the biggest, biggest problem on here. NARRATOR: British engineer, Ian Carling, is in charge of constructing the roof of the arch. Yes. In 1985 Los Angeles would be terrorized by a series of brutal sexual assaults and murders. Once complete, engineers will slide the vast arch over the reactor. VIKTOR IVKIN (Survivor, worked at the reactor, was there the night of disaster): (Translation) By this time, I had already vomited a couple of times, and if a person shows this reflex, that means they've absorbed over 100 roentgens. Spasibo. Even if all goes well, it will still take six long days. NEWS CLIP, VOICE OF MAN DIRECTING "LIQUIDATORS”: Akuratno, Akuratno. Inside Chernobyl's Mega Tomb Thirty years since the disaster at Chernobyl, there are members on here who weren't even conceived when this played out. They knew they needed something lighter and less rigid. 4 years ago. Inside Chernobyl’s Mega Tomb will air on Wednesday 21 st December, 9pm, on BBC Four. It would shake the heavy tube, generating extreme forces that could damage the arch. Sliding the arch over the reactor walls will be tight. VOICE MAN IN CONTROL ROOM: Okay, thank you. The Film. Jean-Philippe Gardeur is gearing up for the final lift, to raise the second half of the arched enclosure to its full height. After all this time, mankind’s worst nuclear disaster is still so dangerous that the world has to complete an international mega-project just to keep it safe. from fluid pictures PRO . But we will see. In mid February 2013, the Cecil hotel of Los Angeles received complaints of a peculiar dark tinge to the hotels drinking water. It will be the largest structure ever moved across land. A large earthquake here would be felt in Chernobyl. GUILLAUME MOREL: Nothing, everything should be fine. NARRATOR: In the main reactor hall lies the most deadly debris: the remains of the reactor's uranium fuel rods, radioactive dust and molten material from the core of the reactor. Radiation from the debris and the reactor itself soon killed another 28 people. Winter temperatures here can plunge to minus-20 degrees Fahrenheit. I mean you can't go back. Among the liquidators was Ivan Martynenko. If its roof collapses, it will throw another lethal cloud of radioactive dust out into the atmosphere, where the wind could blow it over the surrounding area. After Chernobyl exploded, it spewed radioactive dust onto the surrounding countryside. Episode guide, trailer, review, preview, cast list and where to stream it on demand, on catch up and download. GUILLAUME MOREL (General Methods Coordinator): People will follow the sliding, itself, of the arch. Inside Chernobyl's Mega Tomb. The Chernobyl disaster of 1986 resulted in a radioactive fallout which was 100 times greater than a nuclear bomb. They told us that if we were exposed to the level of 10 roentgens, we would be honorably discharged. We have a lot of watchmen, because our clearance is very limited. Our arch is warrantied for 100 years, so at the maximum, they can take 100 years. Like many others, he received a large dose of radiation. 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