1. Measurements have confirmed that there was no release of radioactivity into the atmosphere. 2. Sirens have recently been built within 3 kilometers of the release of radioactivity . 3. These procedures are intended to prevent release of radioactivity . 4. It is unclear how long the ceramic form will retard the release of radioactivity . 5. The nuclear lab suffered no major damage and officials said there was no release of radioactivity . 6. The concrete sarcophagus encasing the wrecked reactor at Chernobyl is deteriorating, threatening another release of radioactivity . 7. But speculation is growing that plant officials'slow response compounded the damage and release of radioactivity . 8. Authorities say nuclear materials have been shipped for three decades with no incident causing the release of radioactivity . 9. The containment building is the last of several safeguards that prevent the release of radioactivity to the environment. 10. The biggest distinction is that the Chernobyl design lacks a containment structure to help prevent the release of radioactivity .
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