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Operation Bedrock
Information
Country United States
Period 1974–1975
Number of tests 27
Test type underground shaft, tunnel
Max. yield 750 kilotonnes of TNT (3,100 TJ)

The United States's Bedrock nuclear test series was a group of 27 nuclear tests carried out by the United States between 1974 and 1975. These tests were done underground. They followed a series called Operation Arbor and came before the Operation Anvil series.

What Was Operation Bedrock?

Operation Bedrock was a series of nuclear tests. These tests were conducted by the United States. They happened from 1974 to 1975. The main goal was to develop and improve nuclear weapons. Scientists also performed safety experiments.

Where Did These Tests Happen?

All the tests in Operation Bedrock took place at the Nevada Test Site (NTS). This site is a large area in Nevada, USA. It was specifically used for testing nuclear devices underground.

How Were the Tests Done?

The tests were performed underground. This means the nuclear devices were placed deep inside the Earth. They were either in shafts (deep holes) or tunnels. This method helped to contain the explosions. It also reduced the amount of radioactive material released into the air.

Purpose of the Tests

Most of the tests in Operation Bedrock were for "weapons development." This means scientists were working on new designs. They wanted to make nuclear weapons more effective or safer. Some tests were also "safety experiments." These checked how the weapons would behave in different situations. This helped to make sure they were safe to handle.

Understanding the Explosions

The power of these explosions is measured in kilotons (kt). One kiloton is equal to the energy of 1,000 tons of TNT. The biggest test in Operation Bedrock was "Camembert." It had a yield of 750 kilotons. This is a very powerful explosion.

Key Facts About the Tests

During Operation Bedrock, 27 nuclear tests happened. They were all underground. Some tests happened at the exact same time in the same hole. This was a way to test multiple devices at once. Sometimes, small amounts of radioactive material were detected after a test. This is called "venting."

Notable Tests in the Series

  • Escabosa: This test happened on July 10, 1974. It had a yield of 150 kilotons.
  • Portmanteau: On August 30, 1974, this test released 160 kilotons of energy.
  • Hybla Fair: This test on October 28, 1974, was a "weapon effect" test. It checked how nuclear blasts affected things.
  • Tybo: One of the larger tests, Tybo, occurred on May 14, 1975. It had a yield of 380 kilotons.
  • Camembert: The most powerful test in the series was Camembert. It happened on June 26, 1975, with a yield of 750 kilotons.

Why Are Nuclear Tests Important to Study?

Studying past nuclear tests helps us understand history. It shows how countries developed powerful weapons. It also teaches us about the effects of these tests. Today, many countries have agreed to stop nuclear testing. This is to protect the environment and people's health.

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