The inspectors identified a
Severity Level IV Non-Cited Violation of
10 CFR 50.9 because the licensee failed to provide complete and accurate information in a submittal of
siren test data for the
ANS PI. Specifically, licensee staff inappropriately added the results of weekly
siren tests to the results of monthly
siren tests when calculating the
ANS PI for the first calendar quarter of 2003. On March 31, 2003, licensee staff changed a procedure for computing the
ANS PI to include the results of weekly
siren tests and inappropriately implemented the procedure revision retroactive to the first day of the quarter (January 1, 2003). By adding the weekly
siren test data, the licensee changed the overall character of its quarterly
siren performance indicator results. The licensee has subsequently conducted an adequate root cause evaluation and initiated adequate corrective action to correct and re-submit the first quarter 2003
ANS PI data.
