Project 58/58A
| Project 58/58A | |
|---|---|
| File:Coulomb-C.jpg
Coulomb-C
|
|
| Information | |
| Country | United States |
| Test site | NTS Area 12, Rainier Mesa; NTS, Areas 1-4, 6-10, Yucca Flat |
| Period | 1957-1958 |
| Number of tests | 4 |
| Test type | dry surface, underground shaft, underground tunnel |
| Max. yield | 500 tonnes of TNT (2,100 GJ) |
| Navigation | |
| Previous test series | Operation Plumbbob |
| Next test series | Operation Hardtack I |
Operation Project 58/58A[1] was a series of 4 nuclear tests conducted by the United States in 1957-1958 at the Nevada Test Site. These tests followed the Operation Plumbbob series and preceded the Operation Hardtack I series.
All the tests in Project 58 were one-point safety tests.[2] They were intended to freeze device designs prior to full-scale tests at Operation Hardtack I. No significant yield was expected from either, but the second, Coulomb-C, a surface test conducted on December 9, produced an unanticipated yield of 500 tons. Shortly after detonation, fallout readings of fifty roentgens per hour were recorded on the Mercury Highway, and, as the cloud moved toward the southwest, personnel at Jackass Flats involved in construction for future nuclear rocket testing were forced to take cover. Eventually, the cloud reached the Los Angeles area where very low readings briefly caused some public concern.[3]
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| Name [note 1] | Date time (UT) | Local time zone [note 2][4] | Location [note 3] | Elevation + height [note 4] | Delivery [note 5] Purpose [note 6] |
Device [note 7] | Yield [note 8] | Fallout [note 9] | References | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| Pascal-C | 6 December 1957 20:15:00.0 | PST (-8 hrs) |
NTS Area U3e Lua error in package.lua at line 80: module 'strict' not found. | 1,202 m (3,944 ft) - 80 m (260 ft) | underground shaft, safety experiment |
XW-42 ? | 10 t | [1][5][6][7][8] | One point safety test, partially successful (?). | |
| Coulomb-C | 9 December 1957 20:00:?? | PST (-8 hrs) |
NTS Area S3i Lua error in package.lua at line 80: module 'strict' not found. | 1,225 m (4,019 ft) + 0 | dry surface, safety experiment |
Moccasin | 500 t | I-131 venting detected, 69 kCi (2,600 TBq) | [1][5][6][7][8][9][10] | One point safety test, upper bound overtest. Similar to the Moccasin device fired in Hardtack II Hidalgo. Failure, 500 ton explosion. |
| Venus | 22 February 1958 01:00:00 | PST (-8 hrs) |
NTS Area U12d.01 Lua error in package.lua at line 80: module 'strict' not found. | 2,104 m (6,903 ft) - 30.48 m (100.0 ft) | underground tunnel, safety experiment |
XW-47 primary ? | 500 kg | [1][5][6][7][8][10][11] | One point safety test, partially successful (?). Similar to Hardtack II Oberon and Sanford devices. | |
| Uranus | 14 March 1958 22:00:00 | PST (-8 hrs) |
NTS Area U12c.01 Lua error in package.lua at line 80: module 'strict' not found. | 2,068 m (6,785 ft) - 34.75 m (114.0 ft) | underground tunnel, safety experiment |
XW-48 | 500 kg | [1][5][6][7][8][10][11] | One point safety test, partially successful (?). Similar to devices fired in Hardtack II Mars, Tamalpais, and Ceres. |
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This article incorporates public domain material from websites or documents of the United States Department of Energy.
- ↑ 1.0 1.1 1.2 1.3 1.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ U.S. Department of Energy, Battlefield of the Cold War, The Nevada Test Site, Volume 1, Atmospheric Nuclear Weapons Testing, 1951-1963, DOE/MA-0003
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 5.2 5.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 6.0 6.1 6.2 6.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 7.0 7.1 7.2 7.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 8.0 8.1 8.2 8.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 10.0 10.1 10.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 11.0 11.1 Lua error in package.lua at line 80: module 'strict' not found.
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