Operation Sunbeam

Operation Sunbeam
Operation Sunbeam
	Sunbeam Little Feller I. 0.018 kilotons.
Information
Country	United States
Test site	NTS Area 18, Buckboard Mesa; NTS Areas 5, 11, Frenchman Flat;
Period	1962
Number of tests	4
Test type	cratering, dry surface, gun deployed, tower
Max. yield	1.6 kilotonnes of TNT (6.7 TJ)
Test series chronology
	← Operation Nougat Operation Dominic →

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Operation Sunbeam^[1] (also known as Operation Dominic II)^[2] was a series of four nuclear tests conducted at the United States's Nevada Test Site in 1962. Operation Sunbeam tested tactical nuclear warheads; the most notable was the Davy Crockett.

The chief milestone of Operation Sunbeam was that it was the last nuclear test series on the Nevada Test Site conducted in the atmosphere by the United States. Since Operation Sunbeam, specifically the Little Feller 1 test of the Davy Crockett, all US nuclear tests on the Test Site have been carried out underground in accordance with the Partial Test Ban Treaty.

List of the nuclear tests

United States' Sunbeam series tests and detonations
Name ^{[note 1]}	Date time (UT)	Local time 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]}	References	Notes
Little Feller II	July 7, 1962 19:00:??	PST (–8 hrs)	NTS 37°07′09″N 116°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	W-54	22 t	I-131 venting detected, 0	^[1]^[4]^[5]^[6]^[7]^[8]	Used a stockpile Davy Crockett warhead. The Army's part of Sunbeam was Operation Ivy Flats.
Johnnie Boy	July 11, 1962 16:45:00.09	PST (–8 hrs)	NTS 37°07′20″N 116°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 TADM	500 t	Venting detected off site	^[1]^[4]^[5]^[7]^[8]^[9]	TADM (Tactical Atomic Demolition Munition) test, similar to Plumbbob Stokes.
Small Boy	July 14, 1962 18:30:??	PST (–8 hrs)	NTS Area 5 36°47′53″N 115°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 kt	I-131 venting detected, 270 kCi (10,000 TBq)	^[1]^[4]^[5]^[6]^[7]^[8]	Test of missile silo hardening principles, specifically EMP, similar to Nougat Ermine, Chinchilla I/II, Armadillo.
Little Feller I	July 17, 1962 17:00:??	PST (–8 hrs)	Launch from NTS Area 18, Buckboard Mesa 37°05′10″N 116°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 over NTS 37°06′34″N 116°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	W54	18 t	Venting detected off site, 3 kCi (110 TBq)	^[1]^[4]^[5]^[6]^[7]^[8]	Army Operation Ivy Flats, witnessed by Robert Kennedy. Last atmospheric test at NTS, used a stockpile Davy Crockett warhead.

^ 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.
^ 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 the IANA time zone database.
^ 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.
^ 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.
^ Atmospheric, airdrop, balloon, gun, cruise missile, rocket, surface, tower, and barge are all disallowed by the Partial 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.
^ Include weapons development, weapon effects, safety test, transport safety test, war, science, joint verification and industrial/peaceful, which may be further broken down.
^ 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.
^ Estimated energy yield in tons, kilotons, and megatons. A ton of TNT equivalent is defined as 4.184 gigajoules (1 gigacalorie).
^ 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

^ ^a ^b ^c ^d ^e Yang, Xiaoping; North, Robert; Romney, Carl (August 2000), CMR Nuclear Explosion Database (Revision 3), SMDC Monitoring Research
^ DOMINIC II Fact Sheet Defense Threat Reduction Agency
^ "Time Zone Historical Database". iana.com. Retrieved March 8, 2014.
^ ^a ^b ^c ^d Estimated 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, retrieved January 5, 2014
^ ^a ^b ^c ^d Sublette, Carey, Nuclear Weapons Archive, retrieved January 6, 2014
^ ^a ^b ^c Norris, 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 from the original (PDF) on October 29, 2013, retrieved October 26, 2013
^ ^a ^b ^c ^d Hansen, Chuck (1995), The Swords of Armageddon, Vol. 8, Sunnyvale, CA: Chukelea Publications, ISBN 978-0-9791915-1-0
^ ^a ^b ^c ^d United 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 from the original (PDF) on October 12, 2006, retrieved December 18, 2013
^ Radiological Effluents Released from U.S. Continental Tests 1961 Through 1992 (DOE/NV-317 Rev. 1) (PDF), DOE Nevada Operations Office, August 1996, archived from the original (PDF) on November 3, 2013, retrieved October 31, 2013

[3] 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.

[4] 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 the IANA time zone database.

[6] 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.

[7] 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.

[8] Atmospheric, airdrop, balloon, gun, cruise missile, rocket, surface, tower, and barge are all disallowed by the Partial 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.

[9] Include weapons development, weapon effects, safety test, transport safety test, war, science, joint verification and industrial/peaceful, which may be further broken down.

[10] 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.

[11] Estimated energy yield in tons, kilotons, and megatons. A ton of TNT equivalent is defined as 4.184 gigajoules (1 gigacalorie).

[12] 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.

[LT_1-1] Yang, Xiaoping; North, Robert; Romney, Carl (August 2000), CMR Nuclear Explosion Database (Revision 3), SMDC Monitoring Research

[2] DOMINIC II Fact Sheet Defense Threat Reduction Agency

[5] "Time Zone Historical Database". iana.com. Retrieved March 8, 2014.

[LT_150-13] Estimated 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, retrieved January 5, 2014

[LT_148-14] Sublette, Carey, Nuclear Weapons Archive, retrieved January 6, 2014

[LT_44-15] Norris, 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 from the original (PDF) on October 29, 2013, retrieved October 26, 2013

[LT_24-16] Hansen, Chuck (1995), The Swords of Armageddon, Vol. 8, Sunnyvale, CA: Chukelea Publications, ISBN 978-0-9791915-1-0

[LT_6-17] United 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 from the original (PDF) on October 12, 2006, retrieved December 18, 2013

[LT_48-18] Radiological Effluents Released from U.S. Continental Tests 1961 Through 1992 (DOE/NV-317 Rev. 1) (PDF), DOE Nevada Operations Office, August 1996, archived from the original (PDF) on November 3, 2013, retrieved October 31, 2013

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Operation Sunbeam

List of the nuclear tests

References

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