GNRO-2002/00098, Technical Specification Update to NRC for Period Dated December 9, 2002

Technical Specification Update to NRC for Period Dated December 9, 2002

ML023450211
Person / Time
Site:	Grand Gulf
Issue date:	12/09/2002
From:	Bottemiller C Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
GNRO-2002/00098
Download: ML023450211 (6)

Text

Waterloo Road P.O. Box 756 Port Gibson, MS 39150 Tel 601 437 6299 arbs r Manager Plant Licensing December 9,2002 U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attention: Document Control Desk

Subject:

Technical Specification Bases Update to the NRC for Period Dated December 9,2002 Grand Gulf Nuclear Station Docket No. 50-416 License No. NPF-29 GNRO-2002/00098 Ladies and Gentlemen:

Pursuant to Grand Gulf Nuclear Station (GGNS) Technical Specification 5.5.11, Entergy Operations, Inc. hereby submits an update of all changes made to GGNS Technical Specification Bases since the last submittal (GNRO-2002/00091 letter dated October 25, 2002 to the NRC from GGNS). This update is consistent with update frequency listed in 10CFR50.71(e).

This letter does not contain any commitments.

Should you have any questions, please contact Mike Larson at (601) 437-6685.

Yours truly, CABlMJ L attachment: GGNS Technical Specification Bases Revised Pages cc: (See Next Page)

cc:

Hoeg T. L. (GGNS Senior Resident) (w/a)

Levanway D. E. (Wise Carter) (w/a)

Reynolds N. S. (w/a)

Smith L. J. (Wise Carter) (w/a)

I Thomas IH I 1 (WlO)

U S . Nuclear Regulatory Commission ALL LETTERS ATTN: Mr. E. W. Merschoff (w/2) 61 1 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-4005 U.S. Nuclear Regulatory Commission ALL LETTERS -COURIER ATTN: Mr. David H. Jaffe, NRR/DLPM (w/2) DELIVERY (FEDEX, ETC.)

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ATTACHMENT to GNRO-2002/00098 GGNS Gulf Technical Specification Bases Revised Pages dated December 9,2002 LDC# BASES PAGES AFFECTED TOPIC of CHANGE 02 109 B 3.8-8a, B 3.8-8b, Addition of wording to Technical Specification Bases B 3.8-9 Section B 3.8.1 related to extended Allowed Outage Times for DG's. Includes a editorial correction to footer for Technical Bases Daee B 3.8-9.

AC Sources - Operating B 3.8.1 BASES ACT IONS l3-A (continued) f o r a n inoperable Division 3 DG w h e n Condition B may have already been entered f o r another equipment i n o p e r a b i l i t y a n d i s s t i l l in e f f e c t ) .

The second Completion Time (14 days) applies t o a n inoperable Division 1 or Division 2 DG a n d i s a r i s k -

informed allowed outage time ( A O T ) based on a p l a n t s p e c i f i c r i s k a n a l y s i s . The extended AOT would t y p i c a l l y be used f o r vol untary pl anned maintenance or inspections b u t can a l s o be used f o r c o r r e c t i v e maintenance. However, use of the extended AOT f o r voluntary planned maintenance should be limited t o once within a n operating cycle (18 m o n t h s ) f o r each DG (Division 1 a n d Division 2).

Additional contingencies a r e t o be in place f o r a n y extended AOT duration ( g r e a t e r t h a n 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> a n d u p t o 1 4 days) as follows:

1. Weather conditions will be evaluated p r i o r t o entering a n extended DG AOT f o r voluntary planned maintenance.

An extended DG AOT will n o t be entered f o r voluntary pl anned maintenance purposes i f o f f i ci a1 weather f o r e c a s t s a r e predicting severe condi t i ons ( h u r r i c a n e ,

t r o p i c a l storm, tornado, or snow/ice storm) t h a t could s i g n i f i c a n t l y threaten grid s t a b i l i t y during the p l anned outage time.

2. The condition o f the o f f s i t e power supply a n d swi tchyard wi 11 be eval uated.

3. No e l e c t i v e maintenance will be scheduled within the switchyard t h a t would challenge o f f s i t e power avai 1 abi 1 i t y during the proposed extended O G AOT.

4. Operating crews will be briefed on the DG work plan whenever the extended AOT period i s used, with consideration given t o key procedural actions t h a t w o u l d be required in the event o f a l o s s o f o f f s i t e power or s t a t i o n blackout. I t i s expected t h a t the Division 3 DG can be cross-connected a n d ready t o power required shutdown equipment on e i t h e r Division 1 or Division 2 ESF bus within two hours o f determining a need t o cross-connect.

GRAND GULF B 3.8-8a LDC 02109

AC Sources - Operating B 3.8.1 BASES ACTIONS .LA (continued)

5. High pressure i n j e c t i o n systems ( H P C S a n d R C I C ) a n d 1 the Division 3 DG ( H P C S DG) will n o t be taken o u t of s e r v i c e f o r planned maintenance while DG Division 1 or 2 i s o u t of s e r v i c e f o r extended maintenance.

The t h i r d Completion Time f o r Required Action 8 . 4 established a l i m i t on the maximum time allowed f o r a n y combination of requi red AC power sources t o be inoperable duri ng a n y s i n g l e contiguous occurrence o f f ai 1 in g t o meet the LCO. I f Condition B i s entered while, f o r instance, a n (continued)

GRAND G U L F B 3.8-8b LDC 02109

AC Sources - Operating B 3.8.1 BASES ACTIONS -

8.4 ( c o n t i n u e d )

o f f s i t e c i r c u i t i s inoperable a n d t h a t c i r c u i t i s subsequently restored O P E R A B L E , t h e LCO may a1 ready have been n o t met f o r u p t o 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. This s i t u a t i o n could lead t o a t o t a l of 1 7 days, s i n c e i n i t i a l f a i l u r e t o meet t h e L C O , t o r e s t o r e t h e DG. A t t h i s time, a n o f f s i t e c i r c u i t could a g a i n become i n o p e r a b l e , t h e DG r e s t o r e d O P E R A B L E ,

a n d an a d d i t i o n a l 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> ( f o r a t o t a l of 20 days) allowed p r i o r t o complete r e s t o r a t i o n of t h e LCO. The 1 7 d a y Completion Time provides a l i m i t on t h e time allowed i n a s p e c i f i e d condition a f t e r discovery of f a i l u r e t o meet t h e LCO. This l i m i t i s considered reasonable f o r s i t u a t i o n s i n which Conditions A a n d B a r e entered c o n c u r r e n t l y . The "M"connector between t h e Completion Times means t h a t t h e t h r e e Completion Times apply simultaneously, a n d t h e most r e s t r i c t i v e Completion Time m u s t be met.

As i n Required Action B.2, t h e Completion Time allows f o r a n exception t o t h e normal "time zero" f o r beginning the allowed outage time "clock." This exception r e s u l t s i n e s t a b l i s h i n g t h e "time zero" a t t h e time t h e LCO was i n i t i a l l y n o t met, i n s t e a d of t h e time C o n d i t i o n B was entered.

C . l and C.2 Required Action C . l addresses a c t i o n s t o be taken i n t h e event of concurrent f a i l u r e of redundant required f e a t u r e s .

Required Action C . l reduces t h e v u l n e r a b i l i t y t o a l o s s of f u n c t i o n . The r a t i o n a l e f o r t h e 1 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> i s t h a t Regulatory Guide 1.93 (Ref. 6) allows a Completion Time of 2 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> f o r two required o f f s i t e c i r c u i t s i n o p e r a b l e ,

based u p o n t h e assumption t h a t two complete s a f e t y d i v i s i o n s a r e O P E R A B L E . When a concurrent redundant required f e a t u r e f a i l u r e e x i s t s , t h i s assumption i s n o t t h e c a s e , a n d a s h o r t e r Completion Time of 1 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> i s appropri a t e . These f e a t u r e s a r e designed w i t h redundant s a f e t y r e l a t e d d i v i s i o n s ( i . e . , s i n g l e d i v i s i o n systems a r e n o t included i n t h e l i s t , although, f o r t h i s Required Action, Division 3 i s considered redundant t o Division 1 a n d 2 E C C S ) . Redundant requi red f e a t u r e s f a i 1 ures c o n s i s t of a n y of t h e s e f e a t u r e s t h a t a r e i n o p e r a b l e , because a n y i n o p e r a b i l i t y i s on a d i v i s i o n redundant t o a d i v i s i o n with inoperable o f f s i t e c i r c u i t s .

( c o n t i nued 1 GRAND G U L F B 3.8-9 LDC 02109