ML052300621
| ML052300621 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 08/23/2005 |
| From: | John Honcharik NRC/NRR/DLPM/LPD2 |
| To: | Christian D Virginia Electric & Power Co (VEPCO) |
| Honcharik J, NRR/DE/EMCB, 301-415-1157 | |
| References | |
| TAC MC3705, TAC MC3706 | |
| Download: ML052300621 (4) | |
Text
August 23, 2005 Mr. David A. Christian Sr. Vice President and Chief Nuclear Officer Virginia Electric and Power Company Innsbrook Technical Center 5000 Dominion Blvd.
Glen Allen, Virginia 23060-6711
SUBJECT:
CORRECTION TO AMENDMENT NOS. 242 AND 223, FOR NORTH ANNA POWER STATION (TAC NOS. MC3705 AND MC3706)
Dear Mr. Christian:
On July 8, 2005, the U.S. Nuclear Regulatory Commission (NRC) issued Amendment Nos. 242 and 223 to Renewed Facility Operating License Nos. NPF-4 and NPF-7 for the North Anna Power Station, Units 1 and 2. These amendments were in response to your application dated July 1, 2004, as supplemented by letters dated October 28, 2004, and November 16, 2004.
The amendments revised the Technical Specifications to provide new reactor coolant system pressure-temperature limit curves, low-temperature overpressure protection system (LTOPS) setpoints, and LTOPS enable temperatures that are valid for 50.3 effective full-power years (EFPY) and 52.3 EFPY of operation for North Anna, Units 1 and 2, respectively. Virginia Electric and Power Company informed the NRC staff of editorial corrections to the safety evaluation (SE) supporting the amendment. The NRC staff has resolved this by revising the appropriate section in the SE. The corrected SE page is included as an enclosure to this letter.
Revisions are identified by lines in the margin.
The NRC regrets any inconvenience this may have caused. If you have any questions, please contact me at (301) 415-1157.
Sincerely,
/RA/
John Honcharik, Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-338 and 50-339
Enclosures:
Page 4 of SE cc w/encls: See next page
ML052300621 NRR-106 OFFICE PDII-1/PM PDII-1/LA PDII-1/SC NAME JHoncharik CHawes EMarinos DATE 08/19/05 08/08/05 8/23/05 Enclosure limiting ART that bounds the RPVs of both units is from the North Anna, Unit 2 lower shell forging as stated in the licensees license renewal application dated May 29, 2001 [ADAMS Accession No. ML011500496], and supplemental information for the license renewal application dated October 15, 2002 [ADAMS Accession No. ML022960411]. These submittals documented that the limiting 1/4T RTNDT value of 218.5EF for the North Anna, Unit 2 lower shell forging heat number 990533/297355 is the bounding material for the extended period of operation for both units. The licensee also stated in its July 1, 2004, letter that reviews of the North Anna, Units 1 and 2 RPV integrity data continue to confirm the limiting material properties. The critical parameters for the licensees ART determination for each of these locations are shown in the table below.
Material Location Initial RTNDT (EF)
Fluence at Inside Surface (n/cm2)
Fluence at Location (n/cm2)
Chemistry Factor (1)
(EF)
RTNDT (EF)
Margin (2)
(EF)
ART (EF)
Lower Shell Forging 990533/
297355 1/4T 56 5.91 x 1019 3.687 x 1019 96 128.5 34 (I = 0,
= 17) 218.5 Lower Shell Forging 990533/
297355 3/4T 56 5.91 x 1019 1.435 x 1019 96 105.6 34 (I = 0,
= 17) 195.6 (1) No credible surveillance specimen test data is available for lower shell forging from the licensees RPV surveillance program. Therefore, the chemistry factor for this forging was determined using RG 1.99, Rev. 2, Position 1.1.
(2) The margin term for each ART calculation was based on the establishment of initial material property uncertainty (I) and shift in material property uncertainty () consistent with the guidance in RG 1.99, Rev. 2.
The TS changes submitted by the July 1, 2004 letter, as supplemented by letters dated October 28, 2004, and November 16, 2004, include:
A.
Modified RCS P-T limit curves to include pressure and temperature measurement uncertainty, as well as pressure differences between the point of measurement (RCS hot leg) and point of interest (RPV beltline).
B.
P-T limit curves extended to 50.3 EFPY for North Anna, Unit 1 and 52.3 EFPY for North Anna, Unit 2.
C.
LTOPS setpoints and LTOPS Tenable values to reflect the extended period using methodologies identical to those used for the approved current license.
D.
Common TS P-T limit curves, LTOPS setpoint allowable values, and Tenable values for both units to provide consistent operational requirements.
E.
Increase in the administrative cooldown rate limit from 50EF/hr to 75EF/hr.
North Anna Power Station, Units 1 & 2 cc:
Mr. C. Lee Lintecum County Administrator Louisa County Post Office Box 160 Louisa, Virginia 23093 Ms. Lillian M. Cuoco, Esq.
Senior Counsel Dominion Resources Services, Inc.
Building 475, 5 th floor Rope Ferry Road Waterford, Connecticut 06385 Dr. W. T. Lough Virginia State Corporation Commission Division of Energy Regulation Post Office Box 1197 Richmond, Virginia 23218 Old Dominion Electric Cooperative 4201 Dominion Blvd.
Glen Allen, Virginia 23060 Mr. Chris L. Funderburk, Director Nuclear Licensing & Operations Support Dominion Resources Services, Inc.
Innsbrook Technical Center 5000 Dominion Blvd.
Glen Allen, Virginia 23060-6711 Office of the Attorney General Commonwealth of Virginia 900 East Main Street Richmond, Virginia 23219 Senior Resident Inspector North Anna Power Station U. S. Nuclear Regulatory Commission 1024 Haley Drive Mineral, Virginia 23117 Mr. Jack M. Davis Site Vice President North Anna Power Station Virginia Electric and Power Company Post Office Box 402 Mineral, Virginia 23117-0402 Dr. Robert B. Stroube, MD, MPH State Health Commissioner Office of the Commissioner Virginia Department of Health Post Office Box 2448 Richmond, Virginia 23218