Hardtack II 001.jpg 800 × 792; 100 KB. OPERATION HARDTACK I 1958 DNA 6038F United States Atmospheric Nuclear Weapons Tests Nuclear Test Personnel Review Prepared by tho Defense Nuclear Agency as E•ocutive Agency for the Department of Defense .

Many of these shots were conducted in "unstemmed" holes, that is, holes not back-filled and sealed prior to testing. He and his crewmates had been assigned to witness Operation Hardtack I, a series of nuclear tests in the Pacific. Defense Nuclear Agency.

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. Hardtack De Baca 001.jpg 1,174 × 1,471; 229 KB. Concern about the effects of fallout on the U.S. was certainly making itself felt. With test moratoriums on the horizon, American weapons labs rushed out many new designs. Similar to Hardtack II Evans. Similar to the Lea device.

PLEASE NOTIFY THE DEFENSE NUCLEAR AGENCY, ATTN: STTI, WASHINGTON, D.C. 20305, IF YOUR ADDRESS IS …

One other test was cancelled because weather delays postponed it across the midnight deadline. Another attempt at firing a full yield version of the XW-54/Gnat system puts in a disappointing showing. Device dimensions: 11.7 inches in diameter, 15 inches long, weight 63 lb. [United States. indicates some uncertainty about the preceding value, nicknames for particular devices in quotes. These were termed "rope tricks" by Dr. John Malik, and are caused by thermal energy from the fireball surface vaporizing the cables. Operation Hardtack II 1958 - Nevada Test Site Last changed 15 October 1997. Operation Hardtack II - WikiMili, The Free Encyclopedia - WikiMili, The Free Encyclopedia Media in category "Operation Hardtack II" The following 10 files are in this category, out of 10 total. Predicted yield was 5-9 kt. The world's first underground nuclear test had been fired in the previous NTS series (Plumbbob Ranier), and this series introduced underground testing as a routine procedure. Hardtack II Eddy 002.jpg 800 × 1,038; 114 KB.

For rocket bursts the ground level is "N/A". After the conclusion of Hardtack II, the United States announced a unilateral testing moratorium, which the Soviet Union joined after two last tests on November 1 and 3.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 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. Obviously fallout containment was much less than perfect, but most of the fission product was nonetheless deposited in the shaft instead of escaping, and the radiation that did escape was not lofted so that it could travel far downwind. UCRL test of an alternate W-47 primary in a thermonuclear system mockup. Bikini atoll test sites.jpg 750 × 600; 127 KB. The intention was to reduce the fallout effects of the testing, which were raising great concern, but the "underground" testing procedures were still relatively primitive. Hardtack II Lea 001.jpg 276 × 252; 11 KB. This was a fizzled attempt to fire the LASL designed XW-54 primary at full yield.

Based on device characteristics - 11.3 inches in diameter, 15 inches long, weight 57.3 lb. A hard deadline for testing was set at midnight (0000 hrs), October 31, 1958, as negotiations were set to start that day, and the schedule shows it, with 29 tests executed in October, four of them on the last day. Get this from a library! Operation Hardtack II was a series of 37 nuclear tests conducted by the United States in 1958 at the Nevada Test Site. Similar to devices fired in many of the preceding Hardtack II shots.

This radiation also did not nearly spread as far, only about one-millionth as much radiation exposure occurred to civilians.

Note: For information related to claims, call the Department of Veterans Affairs (VA) at 800-827-1000 or the Department of Justice (DOJ) at 800-729-7327. Although it was fired in an underground tunnel, the shot still vented radioactive material into the atmosphere (visible in the picture below). Operation Hardtack 28.

This was probably a version of the Gnat device, and was similar to devices fired in Hardtack II Otero, Bernalillo, Luna, Mora, Colfax, etc. The De Haven, a destroyer, was one of …

The total civilian radiation exposures was a mere 160 person-rads of thyroid tissue exposure.

Some locations are extremely accurate; others (like airdrops and space blasts) may be quite inaccurate. Credit: Courtesy of Wayne Brooks.

; JRB Associates.

This shot was successful, the predicted yield was 20 kt. Only 45.8 kt total was fired in Hardtack II, and of this only 18.5 kt was fired above ground.

Historical time zone data obtained from the Rough place name and a latitude/longitude reference; for rocket-carried tests, the launch location is specified before the detonation location, if known. 1958 was a banner year for nuclear weapons testing by the U.S., with a total of 77 U.S. tests, more than the three previous record setting years combined. These tests followed the Operation Argus series and preceded the Operation Nougat series. Operation HARDTACK II . ;] -- This report describes the activities of an estimated 1,000 DoD personnel, both military and civilian, in Operation HARDTACK II, a nuclear testing series conducted in … Device dimensions: 11.3 inches in diameter, 15 inches long, weight 66 lb.

Over three months, he witnessed 27 of them.

On Christmas Day in 1943 Captain P. Ayton, Lieutenant L. Hulot, Sergeant D. Roberts, Corporal J. Hourcourighary, Corporal M. Roux, and Corporal Allain undertook the only Allied raid on Jersey “Operation Hardtack 28”.

In the picture below, spikes can be seen propagating down the mooring cables of the balloon.

Hardtack II included 37 tests, the largest test series so far, exceeding the 35 tests of the just completed Hardtack I. Hardtack I had focused primarily on high yield proof or developemental tests of complete thermonuclear weapons, which necessitated it be conducted in the distant Pacific (a total of 35.6 Mt being fired).

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