Risk-Based Allowed Outage Time and Surveillance Test Interval Extensions for Angra 1

Table 1

AOT and STI proposed extensions.

System	AOT	STI
Safety injection system (SIS)	24 hours → 168 hours	1 month → 3 months
Service water system (SWS)	48 hours → 168 hours	1 month → 3 months
Auxiliary feedwater system (AFWS)	48 hours → 168 hours	1 month → 3 months