RBG-46926, Unit 1 - Supplement to License Amendment Request (Lar), to Implement Changes Consistent with TSTF-163 on Diesel Generator Surveillance Requirements

Unit 1 - Supplement to License Amendment Request (Lar), to Implement Changes Consistent with TSTF-163 on Diesel Generator Surveillance Requirements

ML091810118
Person / Time
Site:	River Bend
Issue date:	06/22/2009
From:	Roberts J Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
G9.5, RBF1-09-0082, RBG-46926
Download: ML091810118 (4)

Text

Entergy Operations, Inc.

River Bend Station 5485 U. S. Highway 61 N Entergy St. Francisville, LA 70775 Tel 225 381 4149 Fax 225 635 5068 jrober3@entergy.com Jerry C. Roberts Director, Nuclear Safety Assurance RBG-46926 June 22, 2009 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Subject:

Supplement to License Amendment Request (LAR)

River Bend Station - Unit 1 Docket No. 50-458 License No. NPF-47

Reference:

LAR 2009-01, dated January 21, 2009 (Letter No. RBG-46763)

Application for Technical Specification Change to Adopt NRC Approved Generic Changes TSTF-163, -222, -230, and 306 File No.: G9.5 RBF1-09-0082

Dear Sir or Madam:

On January 21, 2009, Entergy Operations, Inc. submitted a request to amend the Technical Specifications (TS) for River Bend Station as described in the referenced letter (LAR 2009-01). Included in that submittal was a request to implement changes consistent with TSTF-163 on diesel generator surveillance requirements. TS Bases pages were included for information to indicate the changes needed for implementation of the proposed amendment. It has been determined that one of the TS Bases pages included in that submittal requires an additional change to avoid a potential inconsistency with the proposed change to the associated surveillance requirement.

Attached is a copy of the original pages 10 and 11 of Attachment 4 of LAR 2009-11 marked up to indicate the additional change needed to the Bases section. "Insert 9" indicates the new information.

If you have any questions, please contact Danny Williamson at 225-381-4279.

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Supplement to License Amendment Request RBG-46926 June 22, 2009 Page 2 of 2 I declare under penalty of perjury that the foregoing is true and correct. Executed on June 22, 2009.

Sincerely, Jerry C. Roberts Director - Nuclear Safety Assurance Attachment

• 1. Revised pages 10 and 11 of Att. 4 to RBG-46763 cc: U. S. Nuclear Regulatory Commission Region IV 612 East Lamar Blvd., Suite 400 Arlington, TX 76011-4125 NRC Senior Resident Inspector P. 0. Box 1050 St. Francisville, LA 70775 U. S. Nuclear Regulatory Commission Attn: Mr. Alan Wang Washington, DC 20555-0001 Mr. Jeffrey P. Meyers Louisiana Dept. of Environmental Quality Attn: OEC-ERSD P. 0. Box 4312 Baton Rouge, LA 70821-4312

Attachment 4 RBG-46763

'C'D Z Ijj(-0,01rvý -rt-4jJ Page 10 of 11 AC Sources - Operating B 3.8.1 O,..j L4 BASES SURVEILLANCE SR 3.8.1.2 and SR 3.8.1.7 (continued)

REQUIREMENTS I ~A<e4.J~any overshoot) voltage and frequency within 10'seconds for DG JAand supp the assu ns in t e sign basis LOCA analysis (Ref. 5). The start requirements may not be applicable to 3.8.1.2 (see Note 3 of SR 3.8.1.2), when a modified start as described above is used. If a modified start is not used, the start requirements of SR 3.8.1.7 apply. Since SR 3.8.1.7 does require a 10 second start for DG 1A and DG 1 B and 13 seconds for DG IC, it is more restrictive than SR 3.8.1.2, and it may be performed in lieu of SR 3.8.1.2.. This is the intent of Note 1 of SR 3.8.1.2.

Similarly, the performance of SR 3.8.1.12 or SR 3.8.1.19 also satisfies the requirements of SR 3.8.1.2 and SR 3.8.1.7.

.. . The normal 31 day Frequency for SR 3.8.1.2 is consistent with the industry guidelines for assessment of diesel generator performance (Refs. 14 and 15). The 184 day Frequency for SR 3.8.1.7 is a reduction in cold testing consistent with Generic Letter 84-15 (Ref. 7). These Frequencies provide adequate assurance of DG OPERABILITY, while minimizing degradation resulting from testing.

SR 3.8.1.3 This Surveillance demonstrates that the DGs are capable of synchronizing and accepting the surveillance test load of 3,000 - 3,100 kW. These Technical Specification load values were selected in view of human engineering considerations that the smallest graduation on the watt meter is 100 kW. The minimum run time of 60 minutes is required to stabilize engine temperatures, while minimizing the time that the DG is connected to the offsite source.

Although no power factor requirements are established by this SR, the DG is normally operated at a power factor between 0.8 lagging. and 1.0.

The 0.8 value is the design rating of the machine, while 1.0 is an operational limitation to ensure circulating (continued)

RIVER BEND B 3.8-15 Revision No.

-I RBG-46763 Page 11 of 11 INSERT 5 In addition to the SR requirements, the time for the DG to reach steady state operation, unless the modified DG start method is employed, is periodically monitored and the trend'evaluated to identify degradation of governor and voltage regulator performance.

Insert 9 SR 3.8.1.7 requires that, at a 184-day Frequency, the DG starts from standby conditions and achieves the required voltage and frequency within 10 seconds for DG 1A and DG 1B and 13 seconds for DG 1C.