ML14289A514
| ML14289A514 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 10/24/2014 |
| From: | Martha Barillas Plant Licensing Branch II |
| To: | Waldrep B Duke Energy Progress |
| Barillas M DORL/LPL2-2 301-415-2760 | |
| References | |
| TAC MF4294 | |
| Download: ML14289A514 (4) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 24, 2014 Mr. Benjamin C. Waldrep, Vice President Shearon Harris Nuclear Power Plant Duke Energy Progress, Inc.
5413 Shearon Harris Road New Hill, NC 27562
SUBJECT:
SHEARON HARRIS NUCLEAR POWER PLANT, UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST TO REVISE TECHNICAL SPECIFICATION TABLE 3.3-4, LOSS-OF-OFFSITE POWER 6.9 KV EMERGENCY UNDERVOL TAGE PRIMARY SETPOINTS (TAC NO. MF4294)
Dear Mr. Waldrep:
By letter dated June 19, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML14174A118), Duke Energy Progress, Inc. (the licensee), proposed to amend Shearon Harris Nuclear Power Plant, Unit 1 Technical Specifications (TSs) to revise TS 3.3.2, "Engineered Safety Features Actuation System Instrumentation," Table 3.3-4 "Engineered Safety Features Actuation System Instrumentation Trip Setpoints." Specifically, the Functional Unit 9.a, Loss-of-Offsite Power 6.9 kilovolt Emergency Bus Undervoltage-Primary, instrument trip setpoint and associated allowable value are being revised to correct a nonconservative TS. The proposed amendment requests TS changes in accordance with Technical Specification Task Force Traveler TSTF-493, Revision 4, "Clarify Application of Setpoint Methodology for LSSS [Limiting Safety System Setting] Functions."
The U. S. Nuclear Regulatory Commission staff has reviewed the licensee's submittal and determined that additional information is needed in order to complete our review. The enclosed document describes this request for additional information (RAI). The RAI was e-mailed to the licensee in draft form on October 7, 2014 (ADAMS Accession No. ML14286A031), with a response requested by November 14, 2014.
If you have any questions, please call me at 301-415-2760.
Docket No. 50-400
Enclosure:
Request for Additional Information cc w/encl: Distribution via Listserv Sincerely, IRA/
Martha Barillas, Project Manager Plant Licensing Branch 11-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
REQUEST FOR ADDITIONAL INFORMATION SHEARON HARRIS NUCLEAR POWER PLANT, UNIT 1, LICENSE AMENDMENT REQUEST TO REVISE TECHNICAL SPECIFICATION TABLE 3.3-4 LOSS OF OFFSITE POWER 6.9 KV EMERGENCY UNDERVOLTAGE PRIMARY SETPOINTS (TAC NO. MF4294)
By letter dated June 19, 2014 (Agencywide Documents Access and Management System Accession No. ML14174A118), Duke Energy Progress, Inc., proposed to amend Shearon Harris Nuclear Power Plant, Unit 1 Technical Specifications (TSs) to revise TS 3.3.2, "Engineered Safety Features Actuation System Instrumentation," Table 3.3-4 "Engineered Safety Features Actuation System Instrumentation Trip Setpoints." Specifically, the Functional Unit 9.a, Loss-of-Offsite Power 6.9 kilovolt Emergency Bus Undervoltage - Primary, instrument trip setpoint and associated allowable value are being revised to correct a nonconservative TS. The proposed amendment requests TS changes in accordance with Technical Specification Task Force Traveler TSTF-493, Revision 4, "Clarify Application of Setpoint Methodology for LSSS
[Limiting Safety System Setting] Functions."
To complete its review, the Nuclear Regulatory Commission staff is asking for the following request for additional information:
EICB 1 The calculation submitted indicates how the Total Loop Uncertainties, Field Setpoint, Allowable Value, As-Found Tolerance, and As-Left Tolerance have been calculated for the Undervoltage Relays and the Time Delay Relays. The staff noticed the tolerances (e.g., Reference Accuracy, Drift, Measurement and Test Equipment Error) used in calculating these parameters are either based on vendor provided data or from field test data. Provide additional details regarding the magnitude and confidence level of the uncertainties that are based on the vendor-provided data and the evaluation of the field data. Specifically, for each uncertainty tolerance, describe and explain the standard deviation and confidence levels used.
Enclosure
- via memo OFFICE LPL2-2/PM LPL2-2/LA NRR/DE/EICB*
LPL2-2/BC (A)
LPL2-2/PM NAME MBarillas BCiayton JThorp LRegner MBarillas (AKiett for)
DATE 10/24/14 10/23/14 10/01/14 10/24/14 10/24/14