ML14294A587
| ML14294A587 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 10/28/2014 |
| From: | Martha Barillas Plant Licensing Branch II |
| To: | Duke Energy Progress |
| Barillas M DORL/LPL2-2 301-415-2760 | |
| References | |
| TAC MF4801 | |
| Download: ML14294A587 (3) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 Site Vice President H. B. Robinson Steam Electric Plant Duke Energy Progress, Inc.
3581 West Entrance Road Hartsville, SC 29550 October 28, 2014
SUBJECT:
H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING RELIEF REQUEST-11 FOR RELIEF FROM VOLUMETRIC/SURFACE EXAMINATION FREQUENCY REQUIREMENTS OF ASME CODE CASE N-729-1 (TAC NO. MF4801)
Dear Sir/Madam:
By letter dated August 27, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML14251A014), pursuant to Title 10 of the Code of Federal Regulations, Section 50.55a(a)(3)(i), Duke Energy Progress Inc. (the licensee), requested relief from the requirements of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code,Section XI, associated with the examination frequency requirements of Code Case N-729-1 at H. B. Robinson Steam Electric Plant, Unit 2. The licensee proposed an alternative examination requirement for the Reactor Vessel Top Head Penetration Nozzles as documented in its Relief Request-11 letter referenced above.
The U. S. Nuclear Regulatory Commission staff has reviewed the licensee's submittal and determined that additional information is needed in order to complete its review. The enclosed document describes this request for additional information (RAI). The RAI was e-mailed to the licensee in draft form on October 15, 2014 (ADAMS Accession No. ML14290A206), with a response requested by November 14, 2014.
If you have any questions, please call me at 301-415-2760.
Docket No. 50-261
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 H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT 2 RELIEF REQUEST-11 FOR RELIEF FROM VOLUMETRIC/SURFACE EXAMINATION FREQUENCY REQUIREMENTS OF ASME CODE CASE N-729-1 DOCKET NO. 50-261 By letter dated August 27, 2014 (Agencywide Documents Access and Management System Accession No. ML14251A014), Duke Energy Progress Inc. (the licensee), requested relief from the requirements of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code,Section XI, associated with the examination frequency requirements of Code Case N-729-1 at H. B. Robinson Steam Electric Plant, Unit 2. The licensee proposed an alternative examination requirement for the Reactor Vessel Top Head Penetration Nozzles as documented in Relief Request-11.
To complete its review, the Nuclear Regulatory Commission staff requests the following additional information:
- 1) The licensee uses Materials Reliability Program (MRP) 375, "Technical Basis for Reexamination Interval Extension for Alloy 690 PWR [Pressurized-Water Reactor]
Reactor Vessel Top Head Penetration Nozzles," to provide a technical basis for the proposed alternative. With regards to MRP-375, Figures 3-1, 3-3, and 3-5, provide a brief description of the materials tested for each plot that have data points above a hypothetical 5. 7 factor of improvement line necessary to support the licensee's proposed alternative.
- 2) Provide any similarities between the items listed in (1) above and the associated nozzles and weld material used in the current reactor pressure vessel upper head at H. B. Robinson, Unit 2.
Enclosure
ML14290A206), with a response requested by November 14, 2014.
If you have any questions, please call me at 301-415-2760.
Docket No. 50-261
Enclosure:
Request for Additional Information cc w/encl: Distribution via Listserv DISTRIBUTION:
PUBLIC RidsNrrLABCiayton Resource RidsNrrPM Robinson Resource LPL2-1 RIF RidsNrrDoriLPL2-2 Resource MAudrain, NRR ADAMS Accession No.: ML14294A587 Sincerely, IRA/
Martha Barillas, Project Manager Plant Licensing Branch 11-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation RidsACRSACNW _MaiiCTR Resource RidsRgn2MaiiCenter Resource RidsNrrDeEpnb Resource
- via email OFFICE LPL2-2/PM LPL 1-2/LA NRR/DE/EPNB*
LPL2-2/BC (A)
LPL2-2/PM NAME MBa rill as BCiayton DAlley LRegner MBarillas DATE 10/27/14 10/24/14 10/09/14 10/27/14 10/28/14