L-2012-351, Reactor Vessel Material Surveillance Program-Review Surveillance Capsule Withdrawal Schedule for X4

Reactor Vessel Material Surveillance Program-Review Surveillance Capsule Withdrawal Schedule for X4

ML12262A287
Person / Time
Site:	Turkey Point
Issue date:	09/14/2012
From:	Kiley M Florida Power & Light Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
L-2012-351
Download: ML12262A287 (4)

Text

L-2012-351 10 CFR 50.4 10 CFR 50.60(a)

FPL. SEP 1 4 2012 U. S. Nuclear Regulatory Commission Attn.: Document Control Desk Washington, D.C. 20555-0001 Re: Turkey Point Units 3 and 4 Docket Nos. 50-250 and 50-251 Reactor Vessel Material Surveillance Program -

Revised Surveillance Capsule Withdrawal Schedule for X4

References:

(1) M. Kiley (FPL) to U.S. Nuclear Regulatory Commission (L-2010-113), "License Amendment Request No. 205: Extended Power Uprate (EPU)," (TAC Nos. ME4907 and ME4908), Accession No. ML103560169, October 21, 2010.

(2) M. Kiley to U. S. Nuclear Regulatory Commission (L-2011-029), "Response to NRC Request for Additional Information Regarding Extended Power Uprate Amendment Request No. 205 and Reactor Materials Issues - Round 1, Accession No. ML110700068, March 9, 2011.

(3) J. Paige (NRC) to M. Nazar (FPL), "Turkey Point Units 3 and 4 - "Issuance of Amendments Regarding Extended Power Uprate (TAC Nos. ME4907 and ME4908)," Accession No. ML11293A365, June 15, 2012.

By letter L-2010-113 dated October 21, 2010 [Reference 1], Florida Power and Light Company (FPL) requested to amend Renewed Facility Operating Licenses DPR-31 and DPR-41 and revise the Turkey Point (PTN) Units 3 and 4 Technical Specifications (TS). The proposed amendment will increase each unit's licensed core power level from 2300 megawatts thermal (MWt) to 2644 MWt and revise the Renewed Facility Operating Licenses and TS to support operation at this increased core thermal power level. This represented an approximate increase of 15% and was therefore considered an Extended Power Uprate (EPU). Section 2.1.1 of Attachment 4 to the license amendment request addressed PTN's Reactor Vessel Materials Surveillance Program and Surveillance Capsule Withdrawal Schedule.

By letter L-2011-029 dated March 9, 2011 [Reference 2], FPL provided its response to a NRC Request for Additional Information (RAI) regarding the surveillance capsule withdrawal schedule for the last coupon X 4. In the response, FPL stated that "Surveillance Capsule X 4 will be withdrawn when it reaches a fluence that is approximately equivalent to the 80-year (67 EFPY) peak reactor vessel fluence of 8.14 x 1019 neutrons per square centimeter (n/cm 2) (E > 1.0MeV). Therefore, accounting for EPU conditions, Capsule X4 will be withdrawn at the vessel refueling date that is nearest to 35.8 EFPY."

On June 15, 2012, the U.S. Nuclear Regulatory Commission (NRC) issued Amendment Nos. 249 and 245 to Renewed Facility Operating License Nos. DPR-31 and DPR-41 for the Turkey Point Nuclear Plant, Units Nos. 3 and 4, respectively, with supporting Safety Evaluation Report (SER) regarding the Extended Power Uprate [Reference 3] which reflected the above withdrawal date.

Florida Power & Light Company 9760 SW 344 St., Florida City, FL 33035

Turkey Point Nuclear Plant L-2012-351 Docket Nos. 50-250 and 50-251 Page 2 of 4 However, the supporting calculation has been revised and, as a result, the X4 capsule withdrawal 2 9 2 schedule has changed from 35.8 EFPY at 8.14 x 101 n/cm to 38.1 EFPY at 9.297 x 10'9 n/cm Pursuant to 10 CFR 50, Appendix H, III.C.3, FPL requests a NRC review and approval of the enclosed revision to the integrated surveillance capsule removal schedule for PTN Units 3 and 4.

The proposed reactor vessel surveillance capsule removal schedule was developed to implement the recommendations for PTN Units 3 and 4 in MRP-326, CoordinatedPWR Reactor Vessel Surveillance Program (CR VSP) Guidelines. MRP-326 addresses the need for reactor vessel property data at fluences representative of 60 years of operation and beyond for PTN Units 3 and 4 and the industry. The requested change to the Appendix H program for PTN Units 3 and 4 satisfies the requirements of 10 CFR 50, Appendix H and ASTM E-185-82, "Standard Practice for Conducting Surveillance Tests for Light-Water Cooled Nuclear Power Reactor Vessels",

dated July 1, 1982, and is consistent with the guidance of NUREG- 1801, Rev. 2, Generic Aging Lessons Learned.

The NRC SER Section 2.1.1 on the Reactor Vessel Material Surveillance Program states:

"ASTM E 185-82, "Standard Practice for Conducting Surveillance Tests for Light-Water Cooled Nuclear Power Reactor Vessels," recommends that if the maximum shift in ARTNDT is greater than 200 'F, as it is for Turkey Point Units 3 and 4, then five capsules should be withdrawn and tested. PTN meets this criterion. The only change to the surveillance capsule withdrawal schedule to account for EPU is for capsule X4 .

Prior to the EPU, per the most recent approved revision to the withdrawal schedule, this capsule was to be withdrawn at 33.2 EFPY. In the initial recommended withdrawal schedule considering EPU, provided in LR Table 2.1.1-6, the licensee proposed to withdraw the last capsule, X4 , between 31.4 and 47.8 EFPY, which the licensee stated met the requirement that the fluence for the last capsule be at least once and no greater than twice the projected RV end-of-life (EOL) fluence. However, in response to request for additional information (RAI) CVIB- 1.1, by letter dated March 9, 2011 [Reference 2],

the licensee provided a withdrawal date to the nearest refueling outage of 35.8 EFPY at an estimated fluence of 8.14 x 1019 neutrons per square centimeter (n/cm2). The licensee indicated fluence is equivalent to the 80 year (67 EFPY) RV fluence."

Subsequent to the EPU LAR submittal [Reference 1] and the (RAI) CVIB- 1.1 response

[Reference 2], EPRI and the industry developed and finalized MRP-326," CoordinatedPWR Reactor Vessel Surveillance Program (CR VSP) Guidelines" in order to address the need for reactor vessel property data at fluences representative of 60 years of operation and beyond for PTN and the industry. During preparation of that report, FPL corrected the fluence projection for Capsule X4 and determined the capsule should be withdrawn at 38.1 EFPY to assure it accumulates a fluence that is approximately equivalent to the 80-year peak reactor vessel fluence of 9.297 x 1019 n/cm 2 . As previously identified, this is the last capsule scheduled to be removed for PTN Units 3 and 4 integrated surveillance capsule removal schedule. The revised schedule is provided below:

Florida Power & Light Company 9760 SW 344 St., Florida City, FL 33035

Turkey Point Units 3 and 4 L-2012-351 Docket Nos. 50-250 and 50-251 Page 3 of 4 Surveillance Capsule Withdrawal Schedule for Turkey Point Units 3 and 4(5)

Capsule Location Withdrawal Lead Factor Fluence EFPY(') (n/cm 2 , E > 1.0 MeV)

T3 2700 1.15 2.736 0.599 x 1019 (3)

T4 2700 1.17 2.740 0.649 x 1019 (3)

S3 2800 3.46 1.997 1.272 x 1019 (3)

S4 2800 3.41 2.030 1.290 x 1019 (3)

V3 2900 8.06 0.891 1.223 x 1019 (3)

X3 2700/500 (2) 19.85 1.129 2.897 x 1019 (3)

X4 2700/500 (2) 38.1(4) .2.088 9.297 x 1019 (4)

V4 2900 Standby 1.015 U3 300 Standby 0.767 U4 300 Standby 0.767 W3 400 Standby 0.523 W4 400 Standby 0.523 Y3 1500 Standby 0.767 Y4 1500 Standby 0.767 Z3 2300 Standby 0.523 Z4 2300 Standby 0.523

1. Effective Full Power Years (EFPY) from plant startup.

2. Capsules X3 and X4 were moved from the 500 location to the 270' location in 1990.

3. Fluence is measured.

4. Capsule X4 removal time of 38.1 EFPY fulfills the "5th Capsule" to be withdrawn. The EFPY will yield a capsule fluence approximately equivalent to 80 year (67 EFPY) peak vessel fluence of 9.297 x 10' 9 n/cm (E > 1.0 MeV).

5. Capsule removal schedule changes require NRC approval per 10 CFR 50 Appendix H.

Turkey Point Units 3 and 4 L-2012-351 Docket Nos. 50-250 and 50-251 Page 4 of 4 Should you have any questions regarding this submittal, please contact Mr. Robert J. Tomonto, Licensing Manager, at (305) 246-7327.

Very truly yours, Michael Kiley Site Vice President Turkey Point Nuclear Plant cc: USNRC Regional Administrator, Region II USNRC Project Manager, Turkey Point Nuclear Plant USNRC Senior Resident Inspector, Turkey Point Nuclear Plant