ML15302A340
| ML15302A340 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 10/26/2015 |
| From: | Mark D. Sartain Virginia Electric & Power Co (VEPCO) |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 15-0238 | |
| Download: ML15302A340 (2) | |
Text
VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 October 26, 2015 U. S. Nuclear Regulatory Commission Serial No.:
15-0238 Attention: Document Control Desk SPS LIC/CGL: R0 Washington, DC 20555-0001 Docket Nos.:
50-280/281 License Nos.:
DPR-32/37 VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNITS 1 AND 2 FINAL UPDATE REGARDING FLUENCE ASSESSMENT FOR REACTOR VESSEL INLET AND OUTLET NOZZLES By letter dated July 30, 2015 (Serial No. 15-023A), Virginia Electric and Power Company (Dominion) provided an update to the NRC regarding the status of the fluence assessment for the reactor vessel (RV) inlet and outlet nozzles. The update advised the NRC that eight of the twelve inlet and outlet nozzles on the Surry Units 1 and 2 RVs will have maximum fast neutron fluence less than the lxi1017 n/cm2 (E > 1 MeV) fluence threshold at the end of the renewed licensed operating period. The update also advised the NRC that there were four nozzles (two nozzles on each of the RVs) that required additional detailed fluence calculations at a more precise location in the nozzle.
The additional detailed fluence calculations have been completed for the four RV nozzles. The purpose of this letter is to provide the final update to the NRC regarding the additional calculations. The detailed fluence calculations that were performed at a more precise location in the four nozzles concluded that the neutron fluence will remain below the lxi1017 n/cm2 (E > I MeV) threshold at the 1/4T flaw location at the end of the renewed licensed operating period for Surry Units 1 and 2 on May 25, 2032 and January 29, 2033, respectively.
Should you have any questions or require additional information, please contact Mr. Gary D. Miller at (804) 273-2771.
Respectfully, Mark D. Sartain Vice President - Nuclear Engineering Commitments contained in this letter: None.
I Serial No. 1 5-023B Docket Nos. 50-280/281 Page 2 of 2 cc:
U.S. Nuclear Regulatory Commission - Region II Marquis One Tower 245 Peachtree Center Avenue, NE Suite 1200 Atlanta, GA 30303-1257 Ms. Karen Cotton Gross NRC Project Manager - Surry U.S. Nuclear Regulatory Commission One White Flint North Mail Stop 08 G-9A 11555 Rockville Pike Rockville, MD 20852-2738 Dr. V. Sreenivas NRC Project Manager - North Anna U.S. Nuclear Regulatory Commission One White Flint North Mail Stop 08 G-9A 11555 Rockville Pike Rockville, MD 20852-2738 NRC Senior Resident Inspector Surry Power Station