Operation Tumbler–Snapper

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Template:Short description Template:Use mdy dates Template:Infobox nuclear weapons test Template:Side box

Operation Tumbler–Snapper was a series of nuclear weapons tests conducted by the United States in early 1952 at the Nevada Test Site. The Tumbler–Snapper series of tests followed Operation Buster–Jangle and preceded Operation Ivy.

Tests

Tumbler

The Tumbler phase, sponsored by the Atomic Energy Commission, consisted of three airdrops intended to help explain discrepancies in the actual and estimated blast shock wave damage noted on previous detonations and to establish more accurately the optimal height of burst.

Snapper

The Snapper phase, sponsored by the Department of Defense, consisted of one airdrop and four tower shots intended to test various new weapons developments.[1]

The military exercise Desert Rock IV, involving 7350 soldiers, took place during the test series. They trained during the Charlie, Dog, and George shots and observed shot Fox.[2]

Aftermath

The Tumbler-Snapper detonations included some particularly fallout-heavy weapons. Of particular note is shot George, which contaminated more citizens than any other nuclear test in the United States. George alone accounted for some 7 percent of all population exposure to radiation during the 1,032 nuclear tests performed by the United States.[3][4]

File:US nuclear test exposure.png
The ten highest radiation exposures to residents from US continental nuclear testing, with shot George in the first column.

Summary

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United States' Tumbler–Snapper series tests and detonations
Name [note 1] Date time (UT) Local time zone[note 2][5] Location[note 3] Elevation + height [note 4] Delivery,[note 5]
Purpose [note 6] 		Device[note 7] Yield[note 8] Fallout[note 9] References Notes
AbleScript error: No such module "anchor". Template:Dts 17:00:07.5 PST (−8 h) NTS Area 5 Script error: No such module "Coordinates". Script error: No such module "sort".Script error: No such module "convert". + Script error: No such module "convert". free air drop,
weapon effect 		Mk-4 Script error: No such module "sort". iodine-131 venting detected, Script error: No such module "convert". [6][7][8][9][10] U-235 core, same as Ranger Able. Same scale height as Hiroshima and Buster Baker in order to recreate similar blast conditions on a different type of surface.
BakerScript error: No such module "anchor". Template:Dts 17:29:57.1 PST (−8 h) NTS Area 7 Script error: No such module "Coordinates". Script error: No such module "sort".Script error: No such module "convert". + Script error: No such module "convert". free air drop,
weapon effect 		Mk-4 Script error: No such module "sort". iodine-131 venting detected, Script error: No such module "convert". [6][7][8][9][10]

Repeat of Tumbler Able but on the Buster area at a higher height of burst.

CharlieScript error: No such module "anchor". Template:Dts 17:30:10.0 PST (−8 h) NTS Area 7 Script error: No such module "Coordinates". Script error: No such module "sort".Script error: No such module "convert". + Script error: No such module "convert". free air drop,
weapon effect, weapons development 		Mk-4 Script error: No such module "sort". iodine-131 venting detected, Script error: No such module "convert". [6][7][8][9][10] Same scale height as Tumbler Baker in order to check the applicability of cube root blast scaling. Proof test of new core (?). First blast broadcast live on TV. Desert Rock IV.
DogScript error: No such module "anchor". Template:Dts 16:29:59.1 PST (−8 h) NTS Area 7 Script error: No such module "Coordinates". Script error: No such module "sort".Script error: No such module "convert". + Script error: No such module "convert". free air drop, weapon effect,
weapons development 		TX-7 Script error: No such module "sort". iodine-131 venting detected, Script error: No such module "convert". [6][7][8][9][10] Same scale height as Buster Charlie and Easy. First boosted fission test in CONUS. Tested deuterium (without tritium) gas fusion boosting. First detection of a precursor pressure wave. Desert Rock IV.
EasyScript error: No such module "anchor". Template:Dts 12:14:59.3 PST (−8 h) NTS Area 1 Script error: No such module "Coordinates". Script error: No such module "sort".Script error: No such module "convert". + Script error: No such module "convert". tower,
weapons development 		Mk-12 "BROK-1" Script error: No such module "sort". iodine-131 venting detected, Script error: No such module "convert". [6][7][8][9][10] First use of beryllium as tamper.
FoxScript error: No such module "anchor". Template:Dts 11:59:59.6 PST (−8 h) NTS Area 4 Script error: No such module "Coordinates". Script error: No such module "sort".Script error: No such module "convert". + Script error: No such module "convert". tower,
weapons development 		TX-5 "XR1" Script error: No such module "sort". iodine-131 venting detected, Script error: No such module "convert". [6][7][8][9][10] Designed to test the initiation/yield curve. Calibration test for TOM polonium/beryllium internal initiator. Desert Rock IV.
GeorgeScript error: No such module "anchor". Template:Dts 11:54:59.8 PST (−8 h) NTS Area 3 Script error: No such module "Coordinates". Script error: No such module "sort".Script error: No such module "convert". + Script error: No such module "convert". tower,
weapons development 		TX-5 "XR-2" Script error: No such module "sort". iodine-131 venting detected, Script error: No such module "convert". [6][7][8][9][10] Tested an external betatron initiator that shot x-rays into the core, which induced neutrons by photofission. Desert Rock IV.
HowScript error: No such module "anchor". Template:Dts 11:55:00.3 PST (−8 h) NTS Area 2 Script error: No such module "Coordinates". Script error: No such module "sort".Script error: No such module "convert". + Script error: No such module "convert". tower,
weapons development 		TX-12 "Scorpion" Script error: No such module "sort". iodine-131 venting detected, Script error: No such module "convert". [6][7][8][9][10] First test to use a beryllium neutron reflector/tamper.

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  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 the IANA 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 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.
  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 in tons, 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.

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Video

File:A Photographic Study of Blast and Thermal Phenomena - Operation TUMBLER.webm
A photographic-study of blast and thermal phenomena - Operation TUMBLER.

Gallery

References

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  1. ↑ Byrnes, V. A. (1953). Flash blindness. Operation SNAPPER. Nevada Proving Grounds, April–June 1952, Project 4.5. School of Aerospace Medicine. Brooks A.F.B. Texas.
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External links

Template:US Nuclear Tests

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