There is a public interest in Government being as open as possible about matters of nuclear security.
There is a clear requirement to prevent the disclosure of sensitive information about nuclear security that could assist a person or group planning theft, blackmail, sabotage and other malevolent or illegal acts involving nuclear sites, nuclear material or individuals working on or with those sites and materials.
The redacted information does not contribute significantly to the conclusions of the report. The report would have been equally valid if the redacted material had not been included.
Releasing the information could increase the potential for a malicious act, whereas there is no apparent benefit from releasing it.
The balance is clearly in favour of limiting the potential for a malicious act. The public interest test in this instance would favour prudence by not releasing this information.