GNRO-2006/00030, Technical Specification Bases Update to the NRC for Period Dated February 16, 2006

Technical Specification Bases Update to the NRC for Period Dated February 16, 2006

ML061360442
Person / Time
Site:	Grand Gulf
Issue date:	05/15/2006
From:	Bottemiller C Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
GNRO-2006/00030
Download: ML061360442 (7)

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--Entwgy Entergy Operations, Inc.

Waterloo Road P.O. Box 756 Port Gibson, MS 39150 Tel 601 437 6299 Charles A. Bottemiiier Manager Plant Licensng GNRO-2006/00030 May 15,2006 U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attention: Document Control Desk

Subject:

Technical Specification Bases Update to the NRC for Period Dated February 16,2006 Grand Gulf Nuclear Station Docket No. 50-416 License No. NPF-29

Dear Sir and Madam:

Pursuant to Grand Gulf Nuclear Station (GGNS) Technical Specification 5.5.1 1, Entergy Operations, Inc. hereby submits an update of all changes made to GGNS Technical Specification Bases since the last submittal (GNRO-2006/00008 letter dated February 16, 2006 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 Michael Larson at (601) 437-6685.

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

GNRO-2006/00030 PAGE 2 Compton J. N. (w/o)

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

Reynolds N. S. (w/a)

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

NRC Senior Resident Inspector Grand Gulf Nuclear Station Port Gibson, MS 39150 U.S. Nuclear Regulatory Commission ALL LETTERS ATTN: Dr. Bruce S. Mallett (w/2) 61 IRyan Plaza Drive, Suite 400 Arlington, TX 7601 1-4005 U.S. Nuclear Regulatory Commission ALL LETTERS - COURIER ATTN: Mr. Bhalchandra Vaidya, NRR/DLPM (w/2) DELIVERY (FEDEX, ETC.)

ADDRESS ONLY - ****DO ATTN: ADDRESSEE ONLY NOT USE FOR US.

ATTN: Courier Delivery Only Mail Stop OWFN/7D-1 11555 Rockville Pike NOT USED IF EIE USED Rockville, MD 20852-2378

ATTACH MENT to GNRO-2006/00030 Grand Gulf Technical Specification Bases Revised Pages dated May 15,2006 LDC# BASES PAGES AFFECTED TOPIC of CHANGE 06022 B 3.10-38,40, & 41 Revises the wording to remove restriction that early drain down of the upper containment pool can only be performed during refueling outages.

0508 1 B 3.8-25 Change no makes the Low Lube Oil pressure trip a non-critical protective function for all Emergency Diesel Generators.

A C Sources-Operating B 3.8.1 BASES SURVEILLANCE SR 3.8.1.12 (continued)

REQUIREMENTS t h a t could c h a l l e n g e continued s t e a d y s t a t e o p e r a t i o n a n d ,

as a r e s u l t , p l a n t s a f e t y systems. C r e d i t may be taken f o r unplanned e v e n t s t h a t s a t i s f y t h i s SR. Examples o f unplanned e v e n t s may i n c l ude:

1) Unexpected o p e r a t i o n a l e v e n t s which cause t h e equipment t o perform t h e f u n c t i o n s p e c i f i e d by t h i s S u r v e i l l a n c e , f o r which adequate documentation o f t h e requi red performance i s a v a i 1 a b l e ; a n d

2) Post maintenance t e s t i n g t h a t r e q u i r e s performance o f t h i s S u r v e i l l a n c e i n o r d e r t o r e s t o r e t h e component t o O P E R A B L E , provided t h e maintenance was r e q u i r e d ,

o r performed i n c o n j u n c t i o n w i t h maintenance required t o maintain OPERABILITY or reliability.

SR 3.8.1.13 T h i s S u r v e i l l a n c e demonstrates t h a t D G n o n - c r i t i c a l protective functions:

Generator l o s s o f e x c i t a t i o n ,

Generator r e v e r s e power, High j a c k e t water t e m p e r a t u r e ,

Generator o v e r c u r r e n t w i t h v o l t a g e r e s t r a i n t ,

Bus underfrequency ( D G 11 a n d D G 1 2 o n l y ) ,

Engine bearing t e m p e r a t u r e h i g h ( D G 11 a n d DG 1 2 only),

Low t u r b o charger o i l p r e s s u r e ( D G 11 a n d D G 1 2 only) ,

H i g h v i b r a t i o n ( D G 11 a n d D G 1 2 o n l y ) ,

H i g h lube o i l t e m p e r a t u r e (OG II a n d D G 1 2 o n l y ) ,

Low lube o i l p r e s s u r e ,

H i g h crankcase p r e s s u r e , a n d Generator ground o v e r c u r r e n t ( D G 11 a n d DG 1 2 o n l y )

a r e bypassed on a n ECCS i n i t i a t i o n t e s t s i g n a l . The n o n -

c r i t i c a l t r i p s a r e bypassed during D B A s a n d provide alarms on a n abnormal engine c o n d i t i o n s . These alarms provide t h e o p e r a t o r w i t h necessary information t o r e a c t a p p r o p r i a t e l y .

The DG a v a i l a b i l i t y t o m i t i g a t e t h e DBA i s more c r i t i c a l t h a n p r o t e c t i n g t h e engine a g a i n s t (continued)

GRAND GULF B 3.8-25 LDC 05081

S u p p r e s s i o n Pool Makeup-MODE 3 3.10.9 B 3.10 SPECIAL O P E R A T I O N S B 3.10.9 S u p p r e s s i o n Pool Makeup System BASES BACKGROUND M a i n t a i n i n g t h e SPMU i n v e n t o r y i n t h e Upper C o n t a i n m e n t P o o l s w i l l l e a d t o d e l a y s i n c o m p l e t i n g o u t a g e work i n a t i m e l y manner, p a r t i c u l a r l y w i t h t h e a d v e n t o f t h i n g s l i k e N o b l e M e t a l a d d i t i o n t e c h n o l o g y has l e d t o t h e need f o r h o l d i n g t e m p e r a t u r e and p r e s s u r e a t a p o i n t above t h e MODE 4 d e f i n i t i o n o f Table 1.1-1.

The p u r p o s e o f t h i s S p e c i a l O p e r a t i o n s LCO i s t o a l l o w t h e Upper C o n t a i n m e n t Pool t o be d r a i n e d b e l o w i t s normal l e v e l such t h a t c e r t a i n a c t i v i t i e s can p r o c e e d p r i o r t o r e a c h i n g I MODE 4. These a c t i v i t i e s i n c l u d e i n s t a l l a t i o n o f t h e g a t e between t h e r e f u e l i n g c a v i t y and t h e u p p e r c o n t a i n m e n t ( f u e l s t o r a g e p o o l ) and c o m p l e t e l y d r a i n i n g t h e r e a c t o r c a v i t y .

APPLICABLE S u p p o r t i n g a n a l y s e s and e n g i n e e r i n g c a l c u l a t i o n s d e t e r m i n e d SAFETY ANALYSES t h e required water inventory t o ensure t h a t t h e suppression p o o l makeup f u n c t i o n i s s a t i s f i e d i f t h e s p e c i f i e d c o n d i t i o n s o f t h i s S p e c i a l O p e r a t i o n s LCO a r e m e t .

S u p p o r t i n g a n a l y s e s d i f f e r f r o m t h o s e f o r TS 3 . 6 . 2 . 4 i n t h a t a p o r t i o n o f t h e SPMU volume i s assumed t o have a l r e a d y been t r a n s f e r r e d t o t h e suppression pool w i t h t h e remainder a v a i l a b l e from t h e separator storage pool p o r t i o n o f t h e Upper C o n t a i n m e n t P o o l . These a n a l y s e s d e m o n s t r a t e t h a t t h e c o n t a i n m e n t s p r a y f u n c t i o n o f RHR i s n o t r e q u i r e d f o l l o w i n g a d e s i g n b a s i s LOCA t o p r o t e c t t h e c o n t a i n m e n t g i v e n t h e r e d u c e d t e m p e r a t u r e and p r e s s u r e s t i p u l a t e d by t h e LCO. An empty r e a c t o r c a v i t y c r e a t e s a l a r g e h o l d - u p volume t h a t would s i g n i f i c a n t l y d e p l e t e t h e s u p p r e s s i o n pool i n v e n t o r y i f c o n t a i n m e n t s p r a y o p e r a t i o n were t o o c c u r . The a n a l y s i s r e s u l t s demonstrate t h a t t h e containment pressure i n c r e a s e f o l l o w i n g a DBA LOCA w i l l n o t be s u f f i c i e n t t o r e s u l t i n t h e a u t o - i n i t i a t i o n o f containment spray.

I n a d d i t i o n t o t h e d e s i g n b a s i s a n a l y s e s , d r y w e l l bypass c a p a b i l i t y analyses (Reference 1) i n d i c a t e t h a t containment p r e s s u r e c o u l d exceed t h e c o n t a i n m e n t s p r a y a u t o - a c t u a t i o n s e t p o i n t . Steam bypass l e a k a g e and t h e a s s o c i a t e d c a p a b i l i t y a n a l y s e s a r e d i s c u s s e d i n R e f e r e n c e 4. For t h e

~

GRAND GULF B 3.10-38 LDC 0 6 0 2 2

S u p p r e s s i o n P o o l Makeup-MODE 3 3.10.9 BASES LCO c a v i t y f u l f i l l s t h e containment water inventory requirements (continued) assumed i n t h e a n a l y s i s . Once t h e l e v e l o f t h e w e i r w a l l separating the r e f u e l i n g c a v i t y from the separator storage pool i s reached, F i g u r e 3 . 1 0 . 9 - 1 o n l y a p p l i e s t o t h e separator pool. S u p p o r t i n g a n a l y s e s assume t h a t t h e w e i r w a l l gates are n o t i n s t a l l e d .

M a i n t a i n i n g t h e f u e l s t o r a g e and t r a n s f e r c a n a l a r e a p o o l s ensures t h a t water t r a p s i n s i d e containment a r e minimized consistent w i t h the supporting analysis.

The r e a c t o r s u b c r i t i c a l t i m e , s u p p r e s s i o n p o o l a v e r a g e t e m p e r a t u r e , and r e a c t o r steam dome p r e s s u r e a r e a s s u m p t i o n s o f t h e supporting analyses.

E n t r y i n t o MODE 4 o p e r a t i o n does n o t r e q u i r e t h e use o f t h i s S p e c i a l O p e r a t i o n s LCO o r i t s A C T I O N S .

APPLICABILITY The MODE 3 r e q u i r e m e n t s may o n l y be m o d i f i e d f o r a l l o w i n g e a r l y d r a i n - d o w n o f t h e Upper C o n t a i n m e n t Pool d u r i n g a r e a c t o r c o o l down. The r e q u i r e m e n t s o f t h i s LCO p r o v i d e c o n s e r v a t i s m i n t h e r e s p o n s e o f t h e u n i t t o any e v e n t t h a t I

may o c c u r . O p e r a t i o n s i n a l l o t h e r MODES a r e u n a f f e c t e d by t h i s LCO.

ACTIONS A N o t e has been p r o v i d e d t o m o d i f y t h e A C T I O N S r e l a t e d t o d r a i n - d o w n o f Upper C o n t a i n m e n t Pools-MODE 3 . S e c t i o n 1 . 3 ,

C o m p l e t i o n T i m e s , s p e c i f i e s once a C o n d i t i o n has been e n t e r e d , s u b s e q u e n t d i v i s i o n s , s u b s y s t e m s , components, o r v a r i a b l e s e x p r e s s e d i n t h e C o n d i t i o n d i s c o v e r e d t o be inoperable o r n o t w i t h i n l i m i t s , w i l l not r e s u l t i n separate entry i n t o the Condition. Section 1.3 a l s o specifies t h a t R e q u i r e d A c t i o n s o f t h e C o n d i t i o n c o n t i n u e t o a p p l y f o r each a d d i t i o n a l f a i l u r e , w i t h C o m p l e t i o n Times based on i n i t i a l e n t r y i n t o t h e C o n d i t i o n . However, t h e R e q u i r e d A c t i o n s f o r each r e q u i r e m e n t o f t h e LCO n o t met p r o v i d e a p p r o p r i a t e c o m p e n s a t o r y measures f o r s e p a r a t e r e q u i r e m e n t s t h a t a r e n o t m e t . A s such, a N o t e has been p r o v i d e d t h a t a l l o w s s e p a r a t e e n t r y f o r each r e q u i r e m e n t o f t h e LCO.

(continued).

GRAND GULF B 3.10-40 LDC 0 6 0 2 2

Suppression Pool ,Makeup - MODE 3 3.10.9 BASES A C T IONS A 1 A

(continued)

W i t h t h e requirements o f t h e LCO n o t met ( e . g . , Upper Containment Pool l e v e l n o t w i t h i n l i m i t s ) , t h e d r a i n i n g o f t h e Upper Containment Pool i s t o be suspended. Thereby, a worsening o f t h e circumstances w i l l be p r e v e n t e d .

I f one or more o f t h e requirements of t h i s Special Operations LCO a r e not met, t h e immediate implementation o f t h e Requi red Action commences a c t i v i t i e s , which w i 1 1 r e s t o r e o p e r a t i o n c o n s i s t e n t w i t h t h e Special Operations L C O . The Completion Time i s intended t o r e q u i r e t h a t t h e s e Required Actions be implemented i n a very s h o r t time a n d c a r r i e d through i n a n e x p e d i t i o u s manner.

B.1 Required Action 6 . 1 i s a n a l t e r n a t i v e Required Action t h a t can be taken i n s t e a d o f Required Actions A . l a n d A . 2 t o I

r e s t o r e compl lance w i t h t h e normal MODE 3 requirements, thereby e x i t i n g t h i s Special Operations LCOs A p p l i c a b i l i t y .

The allowed Completion Time allows s u f f i c i e n t time t o r e e s t a b l i s h compliance w i t h t h e a p p r o p r i a t e Technical Specification-I f t h e requirements of t h i s Special Operations LCO or t h e normal MODE 3 requirements cannot be met w i t h i n t h e required Completion Time, t h e p l a n t must be brought t o a MODE i n which t h e LCO does not a p p l y . The allowed Completion Time i s reasonable, based on o p e r a t i n g e x p e r i e n c e , t o reach t h e required p l a n t c o n d i t i o n s a n d i s c o n s i s t e n t w i t h t h e time provided i n LCO 3 . 0 . 3 f o r reaching MODE 4 from MODE 3 .

(continued)

GRAND G U L F B 3.10-41 L D C 06022