ENS 49303

v t e ENS Event
04:00 Aug 23, 2013
Title	Part-21 Notification - Ap-1000 Time Response for the Safety Analysis Cannot Be Directly Measured
Event Description	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

ENS 49303 +/-
Where
Westinghouse Electric Corporation Pennsylvania (NRC Region 1)
Organization:	Westinghouse Electric Corporation
Reporting

10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component
Time - Person (Reporting Time:+9.02 h0.376 days <br />0.0537 weeks <br />0.0124 months <br />)
Opened:	James Gresham 13:01 Aug 23, 2013
NRC Officer:	Mark Abramovitz
Last Updated:	Aug 23, 2013
49303 - NRC Website
v • d • e

v t e Emergency Notification System
Westinghouse Electric Corporation with 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component
WEEKMONTHYEAR2017-01-12T05:00:00 [Table view]
[ENS list for Westinghouse Electric Corporation]

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