1.   A nuclear leak?

2.   As old Soviet security equipment declines, the need for a new system to ensure against nuclear leaks becomes critical, Dolley said.

3.   The news release said there has been no evidence of nuclear leaks.

4.   Kondo said the plan was part of its restructuring scheme following the emergence of a scandal sparked by a string of nuclear leaks which officials kept secret.

5.   Public concerns over possible nuclear leaks prompted the Hong Kong government to start daily reports on radiation readings last month.

6.   Public concerns over possible nuclear leaks prompted the Hong Kong government to start daily reports on radiation readings starting March.