At 2115
CST on October 9, 2018, South
Texas Project Electric Generating Station (
STPEGS) experienced an unplanned loss of the Integrated Computer System (
ICS) to the Emergency Operations Facility (
EOF). The loss of
ICS resulted in a major loss of emergency assessment capability to the
STPEGS Emergency Operations Facility (
EOF) for greater than 75 minutes. Assessment capability has been verified to be available in the Unit 1 and Unit 2
Technical Support Centers (
TSC) and the Unit 1 and Unit 2 Control Rooms.
This report is being made pursuant to 10 CFR 50.72(b)(3)(xiii), any event that results in a major loss of emergency assessment capability, off site response capability, or off site communications ability.
The NRC Resident Inspector has been informed.
The cause of the unplanned loss is currently being investigated and compensatory measures are in place.
- * * UPDATE ON 10/10/18 AT 0951 EDT FROM RICK NANCE TO PHIL NATIVIDAD * * *
Integrated Computer System was returned to service as of 0810 CDT on October 10, 2018.
Notified R4DO (Gepford) and CAT via email.
