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New Download – Blast tests of expedient fallout shelters – ORNL-4905

TitleBlast tests of expedient shelters
Creator/AuthorKearny, C.H. ; Chester, C.V.
Publication Date1974 Jan 01
OSTI IdentifierOSTI ID: 4348750
Report Number(s)ORNL–4905
Resource TypeTechnical Report
Resource RelationOther Information: Orig. Receipt Date: 30-JUN-74
Research OrgOak Ridge National Lab., Tenn. (USA)
SubjectN42600* –Engineering–Protective Structures & Equipment; *CIVIL DEFENSE– SHELTERS; *NUCLEAR EXPLOSIONS– SHELTERS; *SHELTERS– PERFORMANCE TESTING; DOORS; RURAL POPULATIONS; SAFETY; SHOCK WAVES; VALVES; WOOD
Description/AbstractOak Ridge National Laboratory field tests of expedient shelters during the past three years have resulted in the selection and development of six types of expedient shelters. These were demonstrated by construction exercises to be the most practical for average rural and small-town Americans to build in the principal environmental regions of the United States. Each type of shelter is designed to be built within 48 hours by average family groups of such Americans, using only widely available materials such as trees, to provide all members with high-protection-factor shelter. To evaluate the blast protection afforded by these six types of expedient shelters, they were blast tested as a part of Defense Nuclear Agency’s Mixed bompany Event, in the blast area of a 500-ton TNT detonationequivalent in air blast effects to a 1.0 to 1.8 kiloton nuclear detonation. A total of twelve shelters, representing six expedient types, were subjected to blast effecta at surface overpressures ranging from 29 to 3 psi. All except the two Door-Covered Trench Shelters were tested as closed shelters. Only one shelter was damaged: the Door-Covered Trench Shelter that was tested as an open shelter at 5 psi. The six types of shelters. tested at the following measured surface overpressures, were: Two Small-Pole Shelters, at 29 psi; Three Wire-Catenary-Roofed Shelters, at 29 psi and 13 psi; One aboveground A-Frame Pole Shelter, at 17 psi; One Shored-Trench Stoop-in Shelter, at 13 psi; Two Log- Covered Trench Shelters, at 13 psi; and Two Door-Covered Trench Shelters, at 5 psi and 3 psi. Earth arching increased the strength of the shelters that had an adequate depth of earth cover relative to the roof span. A new design of quickly closable, expedient blast door was tested at 29, 17 and 13 psi surface overpressure ranges. Only the blast door at 17 psi was damaged, snd even it remained intact and securely closed. Also tested were two new designs of blast valves, both of which can protect against 100 psi overpressures and are closed in 1 to 2 milliseconds. One of these valves, the Overlapping-Flaps Blast Valve, requires only widely available materials and can be made in a few hours with common tools. (auth)
Country of PublicationUnited States
LanguageEnglish
FormatMedium: X; Size: Pages: 78
AvailabilityDep. NTIS $5.45.

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Thanks, Rich

Updated: March 22, 2010 — 10:25 pm

The Author

Rich Fleetwood

Rich is the founder of SurvivalRing, now in it's 20th year, author of multimedia CDs and DVDs, loves the outdoors, his family, his geeky skill-set, and lives in rural Missouri, just a few miles from the Big Muddy. Always ready to help others, he shares what he learns on multiple blogs, social sites, and more. With a background in preparedness and survival skills, training with county, state, and national organizations, and skills in all areas of media and on air experience in live radio and television, Rich is always thinking about the "big picture", when it comes to helping individuals and families prepare for life's little surprises. Since 1997, he has provided guidance, authentic government survival history, and commentary on why we all need to get ready for that fateful day in the future, when we have to get our hands dirty and step in to save the day. He is an award winning videographer (2005 Telly Award), has received state and national scholarly recognition (2006 New Century Scholar and All USA Academic Team), and is a natural with computers, technology, gadgets, small furry mammals, and anything on wheels. Rich likes making friends, solving problems, and creating solutions to everyday issues. He doesn't mind mixing things up, when there is a teaching moment ready to happen. As a constitutional conservative, he's staying quite busy these days. The SurvivalRing Radio Show at www.survivalringradio.com will be coming back SOON!

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