Operation Guardian

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Operation Guardian
Information
Country United States
Test site NTS Area 12, Rainier Mesa; NTS Area 19, 20, Pahute Mesa; NTS, Areas 1-4, 6-10, Yucca Flat
Period 1980-1981
Number of tests 14
Test type ug shaft, ug tunnel
Max. yield 140 kilotonnes of TNT (590 TJ)
Navigation
Previous test series Operation Tinderbox
Next test series Operation Praetorian

Operation Guardian[1] was a series of 14 nuclear tests conducted by the United States in 1980-1981 at the Nevada Test Site. These tests followed the Operation Tinderbox series and preceded the Operation Praetorian series.

The United States test series summary table is here: United States' nuclear testing series.

The detonations in the United States' Guardian series are listed below:

United States' Guardian series tests and detonations
Name[note 1] Date time (UT) Local time zone[note 2] Location[note 3] Elevation + height[note 4] Delivery[note 5] Purpose[note 6] Device[note 7] Yield[note 8] Venting[note 9] References Notes
Miners Iron 31 October 1980 18:00:00.09 PST (-8 hrs)
NTS Area U12n.11 37°12′40″N 116°12′23″W / 37.21121°N 116.20626°W / 37.21121; -116.20626 (Miners Iron) 2,212 m (7,257 ft) - 389.5 m (1,278 ft) ug tunnel weapon effect 10 kt Venting detected, 0.3 Ci (11 GBq) [2][3][4][5][1]
Dauphin 14 November 1980 16:00:50.084 PST (-8 hrs)
NTS Area U9cq 37°06′41″N 116°01′10″W / 37.11144°N 116.01952°W / 37.11144; -116.01952 (Dauphin) 1,306 m (4,285 ft) - 320 m (1,050 ft) ug shaft weapons development 2 kt [4][5][1]
Baseball 15 January 1981 20:00:25.09 PST (-8 hrs)
NTS Area U7ba 37°05′12″N 116°02′45″W / 37.08675°N 116.04585°W / 37.08675; -116.04585 (Baseball) 1,232 m (4,042 ft) - 563.88 m (1,850.0 ft) ug shaft weapons development 99 kt [6][7][4][5][1]
Clairette 5 February 1981 18:00:00.117 PST (-8 hrs)
NTS Area U3kr 37°00′39″N 116°01′58″W / 37.01088°N 116.03291°W / 37.01088; -116.03291 (Clairette) 1,182 m (3,878 ft) - 353.6 m (1,160 ft) ug shaft weapons development less than 20 kt [4][5][1]
Seco 25 February 1981 15:00:00.082 PST (-8 hrs)
NTS Area U8l 37°10′55″N 116°05′06″W / 37.18185°N 116.08512°W / 37.18185; -116.08512 (Seco) 1,356 m (4,449 ft) - 200 m (660 ft) ug shaft weapons development less than 20 kt [4][5][1]
Vide 30 April 1981 14:00:35.084 PST (-8 hrs)
NTS Area U8k 37°10′38″N 116°05′08″W / 37.17731°N 116.08567°W / 37.17731; -116.08567 (Vide) 1,346 m (4,416 ft) - 323 m (1,060 ft) ug shaft weapons development less than 20 kt Venting detected, 3 Ci (110 GBq) [2][3][4][5][1]
Aligote 29 May 1981 16:00:00.094 PST (-8 hrs)
NTS Area U7bg 37°06′06″N 116°00′18″W / 37.1018°N 116.00493°W / 37.1018; -116.00493 (Aligote) 1,311 m (4,301 ft) - 320 m (1,050 ft) ug shaft weapons development 2.5 kt [4][5][1]
Harzer 6 June 1981 18:00:00.084 PST (-8 hrs)
NTS Area U19aj 37°18′12″N 116°19′35″W / 37.30334°N 116.32648°W / 37.30334; -116.32648 (Harzer) 2,073 m (6,801 ft) - 637 m (2,090 ft) ug shaft weapons development 140 kt [4][5][1]
Niza 10 July 1981 14:00:00.096 PST (-8 hrs)
NTS Area U9cr 37°07′43″N 116°02′05″W / 37.12856°N 116.03464°W / 37.12856; -116.03464 (Niza) 1,266 m (4,154 ft) - 341 m (1,119 ft) ug shaft weapons development 4 kt I-131 venting detected, 0 [2][7][3][4][5][1]
Pineau 16 July 1981 15:00:00.096 PST (-8 hrs)
NTS Area U7ao 37°05′19″N 116°01′13″W / 37.08865°N 116.02024°W / 37.08865; -116.02024 (Pineau) 1,259 m (4,131 ft) - 207.26 m (680.0 ft) ug shaft weapons development less than 20 kt [4][5][1]
Havarti 5 August 1981 13:00:41.086 PST (-8 hrs)
NTS Area U10bg 37°09′13″N 116°02′09″W / 37.15369°N 116.03594°W / 37.15369; -116.03594 (Havarti) 1,283 m (4,209 ft) - 200 m (660 ft) ug shaft weapons development less than 20 kt I-131 venting detected, 0 [2][4][5][1]
Islay 27 August 1981 14:00:31.088 PST (-8 hrs)
NTS Area U2er 37°09′37″N 116°04′03″W / 37.16038°N 116.06743°W / 37.16038; -116.06743 (Islay) 1,297 m (4,255 ft) - 294 m (965 ft) ug shaft weapons development 4 kt Venting detected, 700 Ci (26,000 GBq) [2][7][3][4][5][1]
Trebiano 4 September 1981 15:00:00.103 PST (-8 hrs)
NTS Area U3lj 37°03′29″N 116°02′56″W / 37.05806°N 116.04894°W / 37.05806; -116.04894 (Trebiano) 1,211 m (3,973 ft) - 305.4 m (1,002 ft) ug shaft weapons development 1 kt Venting detected, 200 Ci (7,400 GBq) [2][7][3][4][5][1]
Cernada 24 September 1981 15:00:00.089 PST (-8 hrs)
NTS Area U3kk 37°00′31″N 116°01′28″W / 37.00851°N 116.02453°W / 37.00851; -116.02453 (Cernada) 1,181 m (3,875 ft) - 213.2 m (699 ft) ug shaft weapons development less than 20 kt [4][5][1]

Table notes:

  1. ^ The US, France and Great Britain have code-named their test events, while the USSR and China have 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 savings time, add one additional hour. If the result is less than 00:00, add 24 hours and subtract 1 from the day; if it's greater than or equal to 24:00, subtract 24 hours and add 1 to the day.
  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 preceeding value, nicknames for particular devices in quotes. This category of information is often not officially disclosed.
  8. ^ Estimated energy yield in tonnes, kilotonnes, and megatonnes (all metric units).
  9. ^ Emissions to atmosphere, 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 everything if not; otherwise notation for whether measured on the site only or off the site, where known, and the measured amount of radiation released.

References[edit]

  1. ^ a b c d e f g h i j k l m n o Yang, Xiaoping; North, Robert; Romney, Carl (August 2000), CMR Nuclear Explosion Database (Revision 3), SMDC Monitoring Research 
  2. ^ a b c d e f Estimated exposures and thyroid doses received by the American people from Iodine-131 in fallout following Nevada atmospheric nuclear bomb tests, Chapter 2, National Cancer Institute, 1997, retrieved 2014-01-05 
  3. ^ a b c d e Radiological Effluents Released from U.S. Continental Tests 1961 Through 1992 (DOE/NV-317 Rev. 1), DOE Nevada Operations Office, retrieved 2013-10-31 
  4. ^ a b c d e f g h i j k l m n Official list of underground nuclear explosions, Sandia National Laboratories, 1994-07-01, retrieved 2013-12-18 
  5. ^ a b c d e f g h i j k l m n United States Nuclear Tests: July 1945 through September 1992 (DOE/NV-209 REV15), Las Vegas, NV: Department of Energy, Nevada Operations Office, 2000-12-01, retrieved 2013-12-18 
  6. ^ Hechanova, Anthony E.; O'Donnell, James E. (1998-09-25), Estimates of yield for nuclear tests impacting the groundwater at the Nevada Test Site, Nuclear Science and Technology Division 
  7. ^ a b c d Operation Argus, 1958 (DNA6039F), Washington, DC: Defense Nuclear Agency, Department of Defense, retrieved 26 November 2013