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Operation Sunbeam

From Wikipedia, the free encyclopedia
Series of 1960s US nuclear tests

Operation Sunbeam
Sunbeam Little Feller I. 0.018 kilotons.
Map
Information
CountryUnited States
Test site
  • NTS Area 18, Buckboard Mesa
  • NTS Areas 5, 11, Frenchman Flat
Period1962
Number of tests4
Test typecratering, dry surface, gun deployed, tower
Max. yield1.6kilotonnes of TNT (6.7 TJ)
Test series chronology
Map all coordinates in "Operation Sunbeam" usingOpenStreetMapDownload coordinates asKML

Operation Sunbeam[1] (also known asOperation Dominic II)[2] was a series of fournuclear tests conducted at theUnited States'sNevada Test Site in 1962.Operation Sunbeam testedtactical nuclear warheads; the most notable was theDavy Crockett.

The chief milestone ofOperation Sunbeam was that it was the last nuclear test series on the Nevada Test Site conducted in theatmosphere by the United States. SinceOperation Sunbeam, specifically theLittle Feller 1 test of theDavy Crockett, all US nuclear tests on the Test Site have been carried outunderground in accordance with thePartial Test Ban Treaty.

List of the nuclear tests

[edit]
See also:List of nuclear weapons tests of the United States
United States' Sunbeam series tests and detonations
Name[note 1]Date time (UT)Localtime zone[note 2][3]Location[note 3]Elevation + height[note 4]Delivery[note 5]
Purpose[note 6]		Device[note 7]Yield[note 8]Fallout[note 9]ReferencesNotes
Little Feller IIJuly 7, 1962 19:00:??PST (–8 hrs)
NTS37°07′09″N116°18′14″W / 37.11906°N 116.30381°W /37.11906; -116.30381 (Little Feller II)1,566 m (5,138 ft) + 1 m (3 ft 3 in)dry surface,
weapon effect		W5422 tI-131 venting detected, 0[1][4][5][6][7][8]Used a stockpileDavy Crockett warhead. The Army's part ofSunbeam wasOperation Ivy Flats.
Johnnie BoyJuly 11, 1962 16:45:00.09PST (–8 hrs)
NTS37°07′20″N116°20′02″W / 37.12216°N 116.33395°W /37.12216; -116.33395 (Johnnie Boy)1,572 m (5,157 ft)–0.6 m (2 ft 0 in)cratering,
weapon effect		W30 TADM500 tVenting detected off site[1][4][5][7][8][9]TADM (Tactical Atomic Demolition Munition) test, similar toPlumbbob Stokes.
Small BoyJuly 14, 1962 18:30:??PST (–8 hrs)
NTS Area 536°47′53″N115°55′55″W / 36.798°N 115.932°W /36.798; -115.932 (Small Boy)940 m (3,080 ft) + 3 m (9.8 ft)tower,
weapon effect		1.7 ktI-131 venting detected, 270 kCi (10,000 TBq)[1][4][5][6][7][8]Test of missile silo hardening principles, specifically EMP, similar toNougat Ermine, Chinchilla I/II, Armadillo.
Little Feller IJuly 17, 1962 17:00:??PST (–8 hrs)
Launch from NTS Area 18, Buckboard Mesa37°05′10″N116°19′47″W / 37.08607°N 116.32977°W /37.08607; -116.32977 (Launch_Little Feller I), elv: 1,630 + 2 m (5,347.8 + 6.6 ft);
Detonation overNTS37°06′34″N116°19′06″W / 37.10946°N 116.31823°W /37.10946; -116.31823 (Little Feller I)		2,550 m (8,370 ft) + 1 m (3 ft 3 in)gun deployed,
weapon effect		W5418 tVenting detected off site, 3 kCi (110 TBq)[1][4][5][6][7][8]ArmyOperation Ivy Flats, witnessed by Robert Kennedy. Last atmospheric test at NTS, used a stockpileDavy Crockett warhead.
  1. ^The US, France and Great Britain have code-named their test events, while the USSR and China did not, and therefore have only test numbers (with some exceptions – Soviet peaceful explosions were named). Word translations into English in parentheses unless the name is a proper noun. A dash followed by a number indicates a member of a salvo event. The US also sometimes named the individual explosions in such a salvo test, which results in "name1 – 1(with name2)". If test is canceled or aborted, then the row data like date and location discloses the intended plans, where known.
  2. ^To convert the UT time into standard local, add the number of hours in parentheses to the UT time; for local daylight saving time, add one additional hour. If the result is earlier than 00:00, add 24 hours and subtract 1 from the day; if it is 24:00 or later, subtract 24 hours and add 1 to the day. Historical time zone data obtained from theIANA time zone database.
  3. ^Rough place name and a latitude/longitude reference; for rocket-carried tests, the launch location is specified before the detonation location, if known. Some locations are extremely accurate; others (like airdrops and space blasts) may be quite inaccurate. "~" indicates a likely pro-forma rough location, shared with other tests in that same area.
  4. ^Elevation is the ground level at the point directly below the explosion relative to sea level; height is the additional distance added or subtracted by tower, balloon, shaft, tunnel, air drop or other contrivance. For rocket bursts the ground level is "N/A". In some cases it is not clear if the height is absolute or relative to ground, for example,Plumbbob/John. No number or units indicates the value is unknown, while "0" means zero. Sorting on this column is by elevation and height added together.
  5. ^Atmospheric, airdrop, balloon, gun, cruise missile, rocket, surface, tower, and barge are all disallowed by thePartial Nuclear Test Ban Treaty. Sealed shaft and tunnel are underground, and remained useful under the PTBT. Intentional cratering tests are borderline; they occurred under the treaty, were sometimes protested, and generally overlooked if the test was declared to be a peaceful use.
  6. ^Include weapons development, weapon effects, safety test, transport safety test, war, science, joint verification and industrial/peaceful, which may be further broken down.
  7. ^Designations for test items where known, "?" indicates some uncertainty about the preceding value, nicknames for particular devices in quotes. This category of information is often not officially disclosed.
  8. ^Estimated energy yield intons, kilotons, and megatons. A ton of TNT equivalent is defined as 4.184 gigajoules (1 gigacalorie).
  9. ^Radioactive emission to the atmosphere aside from prompt neutrons, where known. The measured species is only iodine-131 if mentioned, otherwise it is all species. No entry means unknown, probably none if underground and "all" if not; otherwise notation for whether measured on the site only or off the site, where known, and the measured amount of radioactivity released.

References

[edit]
  1. ^abcdeYang, Xiaoping; North, Robert; Romney, Carl (August 2000),CMR Nuclear Explosion Database (Revision 3), SMDC Monitoring Research
  2. ^DOMINIC II Fact SheetDefense Threat Reduction Agency
  3. ^"Time Zone Historical Database". iana.com. RetrievedMarch 8, 2014.
  4. ^abcdEstimated exposures and thyroid doses received by the American people from Iodine-131 in fallout following Nevada atmospheric nuclear bomb tests, Chapter 2(PDF), National Cancer Institute, 1997, archived fromthe original(PDF) on December 21, 2010, retrievedJanuary 5, 2014
  5. ^abcdSublette, Carey,Nuclear Weapons Archive, retrievedJanuary 6, 2014
  6. ^abcNorris, Robert Standish; Cochran, Thomas B. (February 1, 1994),"United States nuclear tests, July 1945 to 31 December 1992 (NWD 94-1)"(PDF),Nuclear Weapons Databook Working Paper, Washington, DC: Natural Resources Defense Council, archived fromthe original(PDF) on October 29, 2013, retrievedOctober 26, 2013
  7. ^abcdHansen, Chuck (1995),The Swords of Armageddon, Vol. 8, Sunnyvale, CA: Chukelea Publications,ISBN 978-0-9791915-1-0
  8. ^abcdUnited States Nuclear Tests: July 1945 through September 1992(PDF) (DOE/NV-209 REV15), Las Vegas, NV: Department of Energy, Nevada Operations Office, December 1, 2000, archived fromthe original(PDF) on October 12, 2006, retrievedDecember 18, 2013
  9. ^Radiological Effluents Released from U.S. Continental Tests 1961 Through 1992 (DOE/NV-317 Rev. 1)(PDF), DOE Nevada Operations Office, August 1996, archived fromthe original(PDF) on November 3, 2013, retrievedOctober 31, 2013
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