Operation Phalanx

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Operation Phalanx
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 1982-1983
Number of tests 18
Test type ug cavity in tunnel, ug shaft, ug tunnel
Max. yield 143 kilotonnes of TNT (600 TJ)
Navigation
Previous test series Operation Praetorian
Next test series Operation Fusileer

Operation Phalanx[1] was a series of 18 nuclear tests conducted by the United States in 1982-1983 at the Nevada Test Site. These tests followed the Operation Praetorian series and preceded the Operation Fusileer series.

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

The detonations [note 1] in the United States' Phalanx series are listed below:

United States' Phalanx series tests and detonations
Name[note 2] Date time (UT) Local time zone[note 3] Location[note 4] Elevation + height[note 5] Delivery[note 6] Purpose[note 7] Device[note 8] Yield[note 9] Venting[note 10] References Notes
Seyval 12 November 1982 19:00:17.1 PST (-8 hrs)
NTS Area U3lm 37°01′24″N 116°01′58″W / 37.02323°N 116.03272°W / 37.02323; -116.03272 (Seyval) 1,187 m (3,894 ft) - 366.06 m (1,201.0 ft) ug shaft weapons development 5 kt [2][3][1]
Manteca 10 December 1982 15:00:20.09 PST (-8 hrs)
NTS Area U4al 37°04′49″N 116°04′22″W / 37.08014°N 116.07276°W / 37.08014; -116.07276 (Manteca) 1,236 m (4,055 ft) - 413 m (1,355 ft) ug shaft weapons development 20 kt Venting detected, 78 Ci (2,900 GBq) [4][5][6][2][3][1]
Coalora 11 February 1983 16:00:00.1 PST (-8 hrs)
NTS Area U3lo 37°03′22″N 116°02′46″W / 37.05622°N 116.04613°W / 37.05622; -116.04613 (Coalora) 1,210 m (3,970 ft) - 274 m (899 ft) ug shaft weapons development less than 20 kt [2][3][1]
Cheedam 17 February 1983 17:00:00.09 PST (-8 hrs)
NTS Area U2et 37°09′46″N 116°03′51″W / 37.16281°N 116.06409°W / 37.16281; -116.06409 (Cheedam) 1,293 m (4,242 ft) - 343 m (1,125 ft) ug shaft weapons development 1.5 kt Venting detected, 0.2 Ci (7.4 GBq) [5][7][6][2][3][1]
Cabra 26 March 1983 20:00:20.09 PST (-8 hrs)
NTS Area U20aj 37°18′02″N 116°27′39″W / 37.30063°N 116.46092°W / 37.30063; -116.46092 (Cabra) 1,907 m (6,257 ft) - 542.5 m (1,780 ft) ug shaft weapons development 45 kt [2][3][1]
Turquoise 14 April 1983 19:00:05.12 PST (-8 hrs)
NTS Area U7bu 37°04′22″N 116°02′49″W / 37.07279°N 116.04682°W / 37.07279; -116.04682 (Turquoise) 1,219 m (3,999 ft) - 533.1 m (1,749 ft) ug shaft weapons development 84 kt I-131 venting detected, 0.000003 Ci (0.00011 GBq) [4][5][6][2][3][1]
Crowdie 5 May 1983 15:00:20.08 PST (-8 hrs)
NTS Area U2fe 37°08′44″N 116°05′25″W / 37.14567°N 116.09021°W / 37.14567; -116.09021 (Crowdie) 1,309 m (4,295 ft) - 390 m (1,280 ft) ug shaft weapons development 6 kt Venting detected, 7 Ci (260 GBq) [5][7][6][2][3][1]
Mini Jade 26 May 1983 14:00:30.09 PST (-8 hrs)
NTS Area U12n.12 37°12′30″N 116°12′22″W / 37.20821°N 116.20599°W / 37.20821; -116.20599 (Mini Jade) 1,828 m (5,997 ft) - 379.2 m (1,244 ft) ug cavity in tunnel weapon effect 4 kt Venting detected, 1 Ci (37 GBq) [5][6][8][2][3][1]
Fahada 26 May 1983 15:00:00.09 PST (-8 hrs)
NTS Area U7bh 37°06′10″N 116°00′24″W / 37.10286°N 116.00657°W / 37.10286; -116.00657 (Fahada) 1,312 m (4,304 ft) - 384.4 m (1,261 ft) ug shaft weapons development 6 kt [2][3][1]
Danablu 9 June 1983 17:00:10.088 PST (-8 hrs)
NTS Area U2eu 37°09′27″N 116°05′24″W / 37.15757°N 116.0901°W / 37.15757; -116.0901 (Danablu) 1,327 m (4,354 ft) - 320 m (1,050 ft) ug shaft weapons development 6 kt I-131 venting detected, 0 [5][7][6][2][3][1]
Laban 3 August 1983 13:00:33.1 PST (-8 hrs)
NTS Area U2ff 37°07′09″N 116°05′24″W / 37.11904°N 116.08989°W / 37.11904; -116.08989 (Laban) 1,276 m (4,186 ft) - 326 m (1,070 ft) ug shaft weapons development 2.5 kt Venting detected, 51 Ci (1,900 GBq) [5][7][6][2][3][1]
Sabado 11 August 1983 14:00:00.12 PST (-8 hrs)
NTS Area U3lc 36°59′52″N 116°00′12″W / 36.99766°N 116.00338°W / 36.99766; -116.00338 (Sabado) 1,175 m (3,855 ft) - 320 m (1,050 ft) ug shaft weapons development 5 kt [2][3][1]
Jarlsberg 27 August 1983 14:00:00.09 PST (-8 hrs)
NTS Area U10ca 37°11′34″N 116°02′06″W / 37.19289°N 116.03491°W / 37.19289; -116.03491 (Jarlsberg) 1,318 m (4,324 ft) - 200 m (660 ft) ug shaft weapons development 2 kt Venting detected [6][2][3][1]
Chancellor 1 September 1983 14:00:00.08 PST (-8 hrs)
NTS Area U19ad 37°16′22″N 116°21′21″W / 37.27272°N 116.35591°W / 37.27272; -116.35591 (Chancellor) 2,013 m (6,604 ft) - 623.6 m (2,046 ft) ug shaft weapons development 143 kt [2][3][1]
Tomme/Midnight Zephyr 21 September 1983 15:00:00.09 PST (-8 hrs)
NTS Area U12n.18 37°12′35″N 116°12′36″W / 37.20969°N 116.21013°W / 37.20969; -116.21013 (Tomme/Midnight Zephyr) 2,230 m (7,320 ft) - 404.8 m (1,328 ft) ug tunnel weapon effect less than 20 kt [2][3][1]
Branco - 1 21 September 1983 16:00:25.08 PST (-8 hrs)
NTS Area U2ew 37°07′17″N 116°03′23″W / 37.12131°N 116.05645°W / 37.12131; -116.05645 (Branco - 1) 1,256 m (4,121 ft) - 293 m (961 ft) ug shaft weapons development 600 t [8][2][3][1] Simutaneous, same hole.
Branco-Herkimer - 2 21 September 1983 16:00:25.08 PST (-8 hrs)
NTS Area U2ew 37°07′17″N 116°03′23″W / 37.12131°N 116.05645°W / 37.12131; -116.05645 (Branco-Herkimer - 2) 1,256 m (4,121 ft) + ug shaft weapons development 2 kt [4][2][3][1] Simutaneous, same hole.
Techado 22 September 1983 15:00:00.12 PST (-8 hrs)
NTS Area U4o 37°06′20″N 116°03′01″W / 37.10556°N 116.05026°W / 37.10556; -116.05026 (Techado) 1,241 m (4,072 ft) - 532.5 m (1,747 ft) ug shaft weapons development 2 kt [4][2][3][1]
Navata 29 September 1983 15:00:00.09 PST (-8 hrs)
NTS Area U3lb 37°03′12″N 116°01′16″W / 37.05338°N 116.02109°W / 37.05338; -116.02109 (Navata) 1,207 m (3,960 ft) - 182.9 m (600 ft) ug shaft safety experiment less than 20 kt [2][3][1]

Table notes:

  1. ^ A bomb test may be a salvo test, defined as two or more explosions "where a period of time between successive individual explosions does not exceed 5 seconds and where the burial points of all explosive devices can be connected by segments of straight lines, each of them connecting two burial points and does not exceed 40 kilometers in length". Mikhailov, V. N., Editor in Chief. Catalog of World Wide Nuclear Testing. Begell-Atom, LLC. 
  2. ^ 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.
  3. ^ 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.
  4. ^ 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.
  5. ^ 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.
  6. ^ 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.
  7. ^ Include weapons development, weapon effects, safety test, transport safety test, war, science, joint verification and industrial/peaceful, which may be further broken down.
  8. ^ 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.
  9. ^ Estimated energy yield in tonnes, kilotonnes, and megatonnes (all metric units).
  10. ^ 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 p q r s t Yang, Xiaoping; North, Robert; Romney, Carl (August 2000), CMR Nuclear Explosion Database (Revision 3), SMDC Monitoring Research 
  2. ^ a b c d e f g h i j k l m n o p q r s Official list of underground nuclear explosions, Sandia National Laboratories, 1994-07-01, retrieved 2013-12-18 
  3. ^ a b c d e f g h i j k l m n o p q r s 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 
  4. ^ a b c d 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 
  5. ^ a b c d e f g 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 
  6. ^ a b c d e f g h Radiological Effluents Released from U.S. Continental Tests 1961 Through 1992 (DOE/NV-317 Rev. 1), DOE Nevada Operations Office, retrieved 2013-10-31 
  7. ^ a b c d Operation Argus, 1958 (DNA6039F), Washington, DC: Defense Nuclear Agency, Department of Defense, retrieved 26 November 2013 
  8. ^ a b Norris, Robert Standish; Cochran, Thomas B. (1 February 1994), "United States nuclear tests, July 1945 to 31 December 1992 (NWD 94-1)", Nuclear Weapons Databook Working Paper (Washington, DC: Natural Resources Defense Council), retrieved 2013-10-26