The following information was received via fax:
Several technical specifications were identified in a Corrective Action Report (CAR) as having a time response surveillance requirement that cannot be directly measured due to logic pathways where overlap with another protective function occurs. Westinghouse is now determining what other reactor trip and engineered safeguards actuation system protective functions have a credited time response in the Safety Analysis for the AP1000 plant and therefore should be assigned a time response surveillance requirement in the Technical Specifications. The evaluation will address the safety implication of the items identified in the CAR as well as confirm that all other protective functions where a time response was credited in the safety analysis have a measurable surveillance requirement in the Techni.cal Specifications.
The safety significance evaluation for the AP1000 plant is still in process and a determination of the potential to create a substantial safety hazard is not yet complete.
Affected licensees:
Summer Units 2 and 3
Vogtle Units 3 and 4
Levy Units 1 and 2
Harris Units 2 and 3
Lee Units 1 and 2
Turkey Points Units 6 and 7
Bellefonte Units 3 and 4
Point of contact: James Gresham 412-720-0754
Westinghouse letter: LTR-NRC-13-62