ML20134H078

Requests Addl Info Re Licensees 960913 Application for License Amend Re Changes to TS That Would Extend Allowed Outage Time for EDGs Up to 14 Days from 3 Days

ML20134H078
Person / Time
Site:	Vogtle
Issue date:	11/07/1996
From:	Larry Wheeler NRC (Affiliation Not Assigned)
To:	Mccoy C GEORGIA POWER CO.
References
TAC-M96769, TAC-M96770, NUDOCS 9611130520
Download: ML20134H078 (5)

Text

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tio -yg f u*uq M t UNITED STATES g 9j NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20666 0001 8

\.....f November 7, 1996 Mr. C. K. McCoy Vice President - Nuclear Vogtle Project Georgia Power Company P. O. Box 1295 Birmingham, AL 35201

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING EXTENDED ALLOWED OUTAGE TIMES FOR THE EMERGENCY DIESEL GENERATORS - V0GTLE ELECTRIC GENERATING PLdT - UNITS 1 AND 2 (TAC NOS. M96769 AND M96770)

Dear Mr. McCoy:

By letter dated September 13, 1996, Georgia Power Ccmpany (GPC) reapplied for license amendments consisting of changes to the Technical Specifications (TSs) that would extend the allowed outage time (A0T) for the emergency diesel generators (EDGs) for up to 14 days from the current limit of 3 days. In order to complete its review of your application, the staff requires the following additional information.

1. Please provide a markup of all TS sections issued on September 25, 1996, that will be affected by your application for the 14-day A0T. The staff recognizes that you may have provided most or all of this information during the review of your application for full conversion to the improved TSs. However, since new TSs have been issued, yot r markup of those new TSs is requested to ensure there is no confusion regarding your A0T request.

2. Beginning with the Station Blackout induced Core Damage Frequency ,

(SB0/CDF) reported in the Vogtle Individual Plant Examination (IPE), l identify and quantify SB0/CDF reduction (credit) taken in the revised Probabilistic Risk Assessment (PRA) for the following:

Plant Wilson availability (alternate AC source)

EDG X- Tie capability l Deletion cf 7/15-11/15 hurricane season (in relation to the assu m loss of offsite power frequency)

Provide a revised SB0/CDF estimate based on the above. Describe and quantify any other credit taken in addition to the three items listed Up above. Provide this as your secand revised SB0/CDF estimate. (Note:

please do not include the 14-day EDG-A0T in this revised baseline )

estimate.) Include in your estimate a 14-day A0T for each of the EDGs and quantify the increase in SB0/CDF. Report this as your final SB0/CDF estimate.

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l Mr. C. K. McCoy November 7, 1996

4. Please inform the staff when a document has been promulgated that provides specific directions for cross-connecting an EDG of one unit to the Class IE busses of the other unit.

Please contact me at (301) 415-1444 if you have any questions.

Sincerely, I l

original signed by Louis L. Wheeler, Senior Project Manager Project Directorate II-2  ;

Division of Reactor Projects - I/II  ;

Office of Nuclear Reactor Regulation 1 Docket Nos. 50-424 and 50-425 cc: See next page l

Distribution: I 99pshot10ey;qq J. Flack E. Merschoff, RII i PUBLIC H. Berkow P. Skinner, RII PD 2-2 Rdg. L. Berry OGC S. Varga L.' Wheeler ACRS J. Zwolinski i

To rsceive a copy of this document, indicate in the box: "C" - Copy without attachment / enc.losure "E" = d ay,with-ath chment/ enclosure "N" - No copy OFFICE PM:PDI @ RPE lE LA:PDil-(tDRdl D:P/11-M ) l )

MAME LWheci M en LBerry M,\ HBehow [ " .

DATE 11/ / /96 11//d //)6 i 11/ / /96

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J DOCUMENT NAME: G:\V0GTLE\V0G96769.LTR OFFIClAL RECORD COPY

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l Mr. C. K. McCoy November 7, 1996 Provide the calculated total CDF resulting from all PRA sequences ,

involving SB0 before and after you met the SB0 Rule (10 CFR 50.63)

I implementation. Provide the instantaneous change in the CDF value for l the worst-case plant configuration allowed under the proposed i

specification. Explain how the EDG preventive maintenance and subsequent on-line operability testing is treated in the CDF calculations.

Provide the EDG reliability and availability values used in the PRA analysis to calculate the SB0 CDF values. Discuss these values in relationship to any goals associated with the implementation of the l maintenance rule and in comparison to actual past performance of the Vogtle EDGs. Also, compare the values used in the PRA analysis to the

target values committed to for SBO. '

! 3. Provide a copy of your approved Configutation Risk Management Program l (CRMP) and explain how it will be maintained and referenced in the '

l administrative control section of the Vogtle TS. Please ensure that

! your submittal includes the following with respect to your CRMP:

L l Describe how PRA insights are (or will be) used in the decision making process, specifically with respect to planning and controlling maintenance activities involving the EDGs. Also, describe training requirements for personnel that will use or report PRA results to upper l management.

Discuss how configuration risk estimates for equipment configurations not modeled in PRA were addressed. Also discuss the software presently used or planned to be ured to generate PRA insights, and how it will be l maintained.

l Discuss the extent to which numerical criteria are used to proceed with a 14-day EDG A0T. Include any incremental Conditional Core Damage Probability estimates, or core damage frequency estimates used as decision criteria. Describe how uncertainties will be addressed in the decision making process, and the role these quantitative insights will play in the management approval process, t

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. . . . - . . = . . - - . . ._ . . . _ . - . . _ - .-. - . - - .. -.

Mr. C. K. McCoy November 7, 1996  !

4. Please inform the staff when a document has been promulgated that provides specific directions for cross-connecting an EDG of one unit to the Class IE busses of the other unit.  ;

Please contact me at (301) 415-1444 if you have any questions.

Sincerely, >

t w . -

l ouis L. Whee er, Senior Project Manager l Project Directorate 11-2 Division of Reactor Projects - I/II l Office of Nuclear Reactor Regulation Docket Nos. 50-424 and 50-425 l cc: See next page 1

l l

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Mr. C. K. McCoy Georgia Power Company Vogtle Electric Generating Plant cc:

Mr. J. A. Bailey Harold Reheis, Director Manager - Licensing Department of Natural Resources Georgia Power Company 205 Butler Street, SE. Suite 1252 P. O. Box 1295 Atlanta, Georgia 30334 Birmingham, Alabama 35201 Attorney General Mr. J. B. Beasley Law Department General Manager, Vogtle Electric 132 Judicial Building Generating Plant Atlanta, Georgia 30334 P. O. Box 1600 Waynesboro, Georgia 30830 Mr. Thomas P. Mozingo Program Manager Regional Administrator, Region II Nuclear Operations U. S. Nuclear Regulatory Commission Oglethorpe Power Corporation 101 Marietta Street, NW., Suite 2900 2100 East Exchange Place Atlanta, Georgia 30323 P. O. Box 1349 Tucker, Georgia 30085-1349 Office of Planning and Budget Room 615B Charles A. Patrizia, Esquire 270 Washington Street, SW. Paul, Hastings, Janofsky & Walker Atlanta, Georgia 30334 10th Floor 1299 Pennsylvania Avenue Office of the County Commissioner Washington, DC 20004-9500 Burke County Commission Waynesboro, Georgia 30830 Arthur H. Domby, Esquire Troutman Sanders Mr. J. D. Woodard NationsBank Plaza Senior Vice President 600 Peachtree Street, NE.

Georgia Power Company Suite 5200 P. O. Box 1295 Atlanta, Georgia 30308-2216 Birmingham, Alabama 35201 Resident Inspector Steven M. Jackson U.S. Nuclear Regulatory Commission Senior Engineer - Power Supply 8805 River Road Municipal Electric Authority Waynesboro, Georgia 30830 of Georgia 1470 Riveredge Parkway, NW Atlanta, Georgia 30328-4684