Project 58
| Project 58/58A | |
|---|---|
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 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. 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.
This article incorporates public domain material from websites or documents of the United States Department of Energy.
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