ML14042A416
| ML14042A416 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 02/19/2014 |
| From: | Martin R Plant Licensing Branch II |
| To: | Pierce C Southern Nuclear Operating Co |
| Martin, Robert NRR/DORL 415-1493 | |
| References | |
| TAC MF3377, TAC MF3378 | |
| Download: ML14042A416 (2) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 Mr. C. R. Pierce Regulatory Affairs Director February 19, 2014 Southern Nuclear Operating Company, Inc.
Post Office Box 1295, Bin - 038 Birmingham, AL 35201-1295
SUBJECT:
VOGTLE ELECTRIC GENERATING PLANT, UNITS 1 AND 2-REQUEST FOR ADDITIONAL INFORMATION (TAC NOS. MF3377 and MF3378)
Dear Mr. Pierce:
By letter dated January 16, 2014 (Agencywide Documents Access and Management System Accession No. ML14016A488), Southern Nuclear Operating Company, Inc. (the licensee) submitted proposed alternative "lSI Program Alternative VEGP-ISI-ALT-10, Version 1" for U.S.
Nuclear Regulatory Commission (NRC) review and authorization. In lieu of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code,Section XI, paragraph IWC-5221, requirement to pressurize the Vogtle Electric Generating Plant, Units 1 and 2 (VEGP),
reactor pressure vessel (RPV) flange 0-ring leakoff lines to normal operating pressure prior to performing a VT-2 visual examination, the licensee proposes to use the pressure developed when the refueling cavity is filled to the normal refueling water level. In order to complete our safety evaluation, the NRC staff requests additional information as follows.
- 2. In order for a VT-2 visual examination for leakage to be effective, the lines must be purged of air. Describe the procedure for ensuring that the lines are water-solid prior to the beginning of the four hour pressurization hold time.
- 3. When there is leakage past the inner 0-ring and the valve on the inner 0-ring leakage line is closed, the inner 0-ring leakage line between the RPV flange and the closed valve will be pressurized to the reactor operating pressure, 2235 psig, and a VT -2 visual examination could be performed at that time. Describe plans for performing an examination of the subject line while pressurized to reactor operating pressure. If an examination is not planned, provide justification, including description of any hardship associated with performing an examination.
C. In order to support the potential for NRC staff response to this issue to be provided by the date requested in your letter, please provide this additional requested information by February 28, 2014.
Docket Nos. 50-424 and 50-425 cc w/encl: Distribution via Listserv Sincerely,
~~~~Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
C. R. Pierce 1
In order to support the potential for NRC staff response to this issue to be provided by the date requested in your letter, please provide this additional requested information by February 28, 2014.
Docket Nos. 50-424 and 50-425 cc w/encl: Distribution via Listserv DISTRIBUTION:
PUBLIC RidsAcrsAcnw_MaiiCTR Resource RidsNrrLASFigueroa Resource RidsNrrPMVogtle Resource LPL2-1R/F Sincerely,
/RAJ Robert E. Martin, Senior Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation JWallace, NRR RidsNrrDoriDpr Resource RidsNrrDorllpl2-1 Resource RidsRgn2MaiiCenter Resource ADAMS A ccess1on N o.: ML14042A416
- B
- 1 d t d F b 5Y ema1 ae e ruary 10 2014 OFFICE DORLILPL2-1/PM DORLILPL2-1 /LA DE/EVIB/BC DORLILPL2-1 /BC DORLILPL2-1/PM NAME RMartin SFigueroa GKulesa*
RPascarelli RMartin DATE 02/19/14 02/18/14 02/10/14 02/19/14 02/19/14 OFFICIAL RECORD COPY