Text

Technical Specification Bases Update to the NRC for Period Dated February 16, 2006
	ML060520650
Person / Time
Site:	Grand Gulf
Issue date:	02/16/2006
From:	Bottemiller C; Entergy Operations
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
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'Waterioo %ad P.O. aox 755 For! Gibsoi;, MS 391 50 Tsl 601 4376299 GNRO-2006/00008 February 16,2006 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-2005/00067 letter dated December 5, 2005 to the NRC from GGNS). This update is consistent with update frequency listed in IOCFR50.71(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-2006/00008 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 1 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-4005 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 U.S.

ATTN: Courier Delivery Only POSTAL SERVICE Mail Stop OWFN/7D-1 ADDRESS*****

11555 Rockville Pike NOT USED IF EIE USED Rockville, MD 20852-2378

ATTACH ME NT to GNRO-2006/00008 Grand Gulf Technical Specification Bases Revised Pages dated February 96,2006 LDC# BASES PAGES AFFECTED TOPIC of CHANGE 06007 B 3.1-24, 3.1-26, 3.3-23, 3.3- Implements pages agreed upon with the NRC for 23a, 3.3-25, 3.3-26, 3.3-93, 3.3- issuance of Technical Specification Amendment 169.

94, 3.3-95, 3.3-96, 3.3-97, 3.3-97a, 3.3-99, 3.3-99a, 3.5-9, 3.5-19, 3.6-23, 3.6-87, 3.6-87a, 3.6-90, 3.6-94, 3.6-119, 3.8-20, 3.8-21, 3.8-22, 3.8-22a, 3.8-25, 3.8-27, 3.8-27a3.8-37, 3.8-37a, 3.8-41 05050 B 3.7-12, 3.7-15 Eliminates requirement for heaters for Control Room Fresh Air handling unit.

Contrcl Rod Scram Times B 3.1.4 BASES (contiqued)

StiRViI L L A N C E The f o u r S R s o f t h i s L C O a r e modified by a Note s t a t i n g t h a t REQUIREMENTS d u r i n g a s i n g l e c o r t r o l rod scram t i m e s u r v e i l : a n c e , t h e C R D pumps s h a l l be i s o l a t e d from t h e a s s o c i a t e d scram accumulator. With t h e C R D pump i s o l a t e d i i . e . , c h a r g i n g valve c l o s e d ? , t h e i n f l u e n c e o f t h e C R D pump head does n o t a f f e c t t h e s i n g l e c o n t r o l rod scram t i m e s . During a f u l l c o r e scram, t h e C R D pump head w o u l d be seen by a l l c o n t r o l rods a n d would have a n e g l i g i b l e e f f e c t on t h e scram insertion times.

SR 3.1.4.1 The scram r e a c t i v i t y used i n DBA a n d t r a n s i e n t a n a l y s e s i s based on assumed c o n t r o l rod scram t i m e . Measurement of t h e scram times with r e a c t o r steam dome p r e s s u r e 2 950 p s i g d e m o n s t r a t e s a c c e p t a b l e scram t i m e s f o r t h e analyzed transients.

Scram i n s e r t i o n times i n c r e a s e w i t h i n c r e a s i n g r e a c t o r p r e s s u r e because o f t h e competing e f f e c t s o f r e a c t o r steam dome p r e s s u r e a n d s t o r e d accumulator e n e r g y . T h e r e f o r e ,

demonstration o f adequate scram times a t r e a c t o r steam dome p r e s s u r e g r e a t e r t h a n 9 5 0 p s i g e n s u r e s t h a t t h e scram times h i l l be w i t h i n t h e s p e c i f i e d l i m i t s a t h i g h e r p r e s s u r e s .

Limits a r e s p e c i f i e d as a f u n c t i o n o f r e a c t o r p r e s s u r e t o account f o r t h e s e n s i t i v i t y of t h e scram i n s e r t i o n times with p r e s s u r e a n d t o a l l o w a range o f p r e s s u r e s over which scram time t e s t i n g can be performed. 1 0 e n s u r e scram time t e s t i n g i s performed w i t h i n a r e a s o n a b l e time f o l l o w ' n g a r e f u e l i n g or a f t e r a shutdown 2 1 2 0 d a y s , a l l c o n t r o l rod:

a r e r e q u i r e d t o be t e s t e d b e f o r e exceeding 40% R T P . This Frequency i s a c c e p t a b l e , c o n s i d e r i n g t h e a d d i t i o n a l s u r v e i l 1 ances performed f o r c o n t r o l rod O P E R A B I L I T Y , t h e f r e q u e n t v e r i f i c a t i o n o f adequate accurnulatcr p r e s s u r e , a n d t h e r e q u i r e d t e s t i n g of c o n t r o l r o d s a f f e c t e d b y f u e l movement w i t h i n t h e a f f e c t e d cclre c e l l a n d b y work o n c o n t r o l rods o r t h e C R D System.

SR 3.1.4.2 Additional t e s t i n g o f a sample of c o n t r o ? rods i s r e q u i r e d t o v e r i f y t h e cot-itir;ued performance of t h e scran? f u n c t i o n d u r i n g the cycle. A representative S a m p l e contains a t yeast 1CZ o f t h e c o n t r o l r o d s . The sample remains

" r e p r e s e n t a t i v e " i f u1o ?lore t h a n 7.5% o f t h e c o n t r o l r o d s i n

C o n t r o l Rilid Scram Times 5 3.1.4 BASES SCRVEILLANCE SR 3.1.4.3 (continued)

REQUIREMENTS The Frequency of o n c e p r i o r t o d e c l a r i n g t h e a f f e c t e d c o n t r o l rod O P E R A B L E i s a c c e p t a b l e b e c a u s e of t h e c a p a b i l i t y o f t e s t i n g t h e c o n t r o l rod o v e r a r a n g e o f o p e r a t i n g c o n d i t i o n s a n d t h e more f r e q u e n t s u r v e i l l a n c e s on o t h e r a s p e c t s o f c o n t r o l rod O P E R A B I L I T Y .

SR 3.1.0.4 When work t h a t c o u l d a f f e c t t h e scram i n s e r t i o n t i m e i s p e r f o r m e d o n a c o n t r o l rod o r C R D S y s t e m , o r when f u e l movement w i t h i n t h e r e a c t o r p r e s s u r e v e s s e l o c c u r s , t e s t i n g must be done t o d e m o n s t r a t e e a c h a f f e c t e d c o n t r o l rod i s s t i l l w i t h i n t h e l i m i t s of T a b l e 3 . 1 . 4 - 1 w i t h t h e r e a c t o r s t e a m dome p r e s s u r e 2 950 p s i g . Where work has been performed a t high r e a c t o r p r e s s u r e , t h e requirements o f S R 3 . 1 . 4 . 3 a n d SR 3 . 1 . 4 . 4 w i l l be s a t i s f i e d w i t h one t e s t .

For a c o n t r o l rod a f f e c t e d by work p e r f o r m e d w h i l e s h u t down, however, a z e r o p r e s s u r e and a h i g h p r e s s u r e t , e s t may be r e q u i r e d . T h i s t e s t i p g e n s u r e s t h a t t h e c o n t r o l rod scram p e r f o r m a n c e i s a c c e p t a b l e f o r o p e r a t i n g r e a c t o r p r e s s u r e c o n d i t i o n s p r i o r t o w i t h d r a w i n g t h e c o n t r o l rod f o r c o n t i n u e d o p e r a t i c n . A l t s r n a t j v e l y , t. test d a r i n g h y d r o s t a t i c p r e s s u r e t e s t i n g could a l s o s a t i s f y both c r i t e r i a . ihhen f u e l movement w i t h i n t h e r e a c t o r p r e s s u r e vessel o c c u r s , only t h o s e c o n t r o l rods a s s o c i s t e d w i t h t h e c o r e c e l l s a f f e c t e d by t h e f u e l movement a r e r e q u i r e d t o be s c r a m t i m e t e s t e d . During a r o u t j n e r e f u e l i n g o l i t a g e , i t i's e x P e c t e d t h a t a 1 -1 c a n t r o ! r o d s ilii 1 1 be a f f ? c t e d .

T h e Frequency o f orice p r i o r t o e x c e e d i n g 4 0 % R I P i s a c c e p t a b l e b e c a u s e o f The c a p a b i ' i i ty of t e s t i n g t h e c c n t r o l rod a t t h e d i f f e r e p t c o n d i t i o n s a n d t h e more f r e q u e n t s u r v e i l l a n c e s o n c t h e r a s p e c t s o f c o r i t r o l rod O ? E R A E I L I T Y .

'2E F E RE N C E S 1. 10 C F R 5 0 , A p D s n d i x ;i, G D C 10

2. U F S A R , SecZiion Q.3.2.5.5.

3. UFSA,R, S e c t i o n 3 . 6 . 1 . 1 . 2 . 5 . 3 .

4. U F S A R , S e c t i o r , 5.2.2.2.3.

5. UFSAR, Section 1 5 . 4 . 1 .

6. U F S A 2 , S e c t i o n 15.4.3.

3 P S I n s t rtimen t a t i on 3 3.3.1.1 BASES SURVEILLANCE The S u r v e i l l a n c e s a r e m o d i f i e d b y a Note t o i n d i c a r e t h a t ,

REQUIREMENTS when a channel i s p l a c e d i n a n i n o p e r a b l e s t a t u s s o l e l y f o r (continued) performance o f r e q u i r e d S u r v e i l l a n c e s , e n t r y i n t o a s s o c i a t e d C o n d i t i o n s a n d Required A c t i o n s may be d e l a y e d f o r u p t o 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months , provided t h e a s s o c i a t e d Function m a i n t a i n s t r i p c a p a b i l i t y . Upon c o m p l e t i o n o f t h e S u r v e i l l a n c e , o r e x p i r a t i o n of t h e 6 hour6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months a l l o w a n c e , t h e c h a n n e l musi be returned t o OPERABLE s t a t u s or the a p p l i c a b l e Condition e n t e r e d a n d Required A c t i o n s t a k e n . This Note i s based on t h e R P S r e l i a b i l i t y a n a l y s i s ( R e f . 9) a s s u m p t i o n o f t h e a v e r a g e t i m e r e q u i r e d t o p e r f o r m cnannel s u r v e i l l a n c e . T h a t a n a l y s i s d e m o n s t r a t e d t h a t t h e 6 h o u r t e s t i n g a l l o w a n c e does n o t s i g n i f i c a n t l y r e d u c e t h e p r o b a b i l i t y t h a t t h e RPS w i l l t r i p when n e c e s s a r y .

SR 3 . 3 . 1 . 1 . 1 Performance of t h e C H A N N E L CHECK once e v e r y 1 2 h o u r s e n s u r e s t h a t a g r o s s f a i l u r e of i n s t r u m e n t a t i o n has n o t o c c u r r e d . A C H A N N E L C H E C K i s n o r m a l l y a comparison o f t h e p a r a m e t e r i n d i c a t e d o n one channel t o a s i m i l a r p a r a m e t e r on o t h e r c h a n n e l s . I t i s based on t h e a s s u n p t i o n t h a t i n s t r u m e n t c h a n n e l s m o n i t o r i n g t h e same p a r a m e t e r shoiild r e a d a p p r o x i m a t e l y t h e same v a l i l e . S i g n i f i c a n t d e v i a t i o n s between t h e i n s t r u m e n t c h a n n e l s c o u l d be a n i n d i c a t i o n o f e x c e s s i v e i n s t r u m e n t d r i f t on one o f t h e c h a n n e l s o r something even mcre s e r i o u s . A C H A N N E L C H E C K w i l l d e t e c t g r o s s channel f a i l u r e ; t h u s , i t i s key t o v e r i f y n g t h e instrumentation continues t o o p e r a t e properly betweep e X h CVANNEL CALIBRATION.

Agreement c r i t e r i a a r e d e t e r m i n e d by t h e p l a n t s t a f f basea o n a combination of t h e channel i n s t r u m e n t u n c e r t a i n t i e s ,

i n c l u d i n g i n d i c a t i o r : a n d r e a d a b i l i t y . I f a channel i s OiJtSide t h e c r i t e r i a , i t rnay be a n i n d i c a t i o n t h a t t h ?

i n s t r u m e n t has d r i f t e d o u t s i d e i t s l i m i t .

The agreement c r i t e r i a i n c l u a e a n e x p e c t a t i o n of o v e r l a p when t r a n s i t i n n i n g between n e u t r o n f l u x i n s t r i i m e n t a t i o n .

The o v e r l a p between SRMs ana IRMs m g s t be d e m o n s t r a t e d p r i o r t o withdrawing S R M s from t h e f u l l y i n s e r t e d p o s i t i o n s i n c e i n d i c a t i o n i s b e i n g t r a n s i t i o n e d from S R M s t o t h e I R M s .

! c i s w i l l e n s u r e t h a t r e a c t o r pcwer w i l l n o t be i n c r e a s e d 7 ,

i n t o a neutron f l g x region w i t h o u t adequate i n d i c a t i o n . ii-e

RPS Instrunentation B 3.3.1.1 BASES SURVEILLANCE SR 3.3.1.1.1 ( c o n t i n u e d )

REQUIREMENTS o v e r l a p between IRMs a n d A P R M s i s o f concern when reducing power i n t o t h e I R M r a n g e . On pcwer i n c r e a s e s , t h e system d e s i g n w i l l p r e v e n t f u r t h e r i n c r e a s e s ( b y i n i t i a t i n g a rod b l o c k ) i f a d e q u a t e o v e r l a p i s not m a i n t a i n e d .

Overlap between IRMs a n d A P R M s e x i s t s when s u f f i c i e n t I R M s a n d A P R M s c o n c u r r e n t l y have o n - s c a l e r e a d i n g s such t h a t t h e t r a n s i t i o n between M O D E 1 a n d M O D E 2 can be made w i t h o u t e i t h e r A P R M downscale rod b l o c k , o r I R M u p s c a l e rod b l o c k .

Overlap between SRMs a n d IRMs s i m i l a r l y e x i s t s when, p r i o r t o withdrawing t h e SRMs from t h e f u l l y i n s e r t e d p o s i t i o n ,

I R M s a r e above 2 / 4 0 on range 1 b e f o r e SRMs have reached t h e u p s c a l e rod b l o c k .

I f o v e r l a p f o r a group o f channels i s n o t demonstrated

( e . g . , I R M / A P R M o v e r l a p ] , t h e reason f o r t h e f a i l u r e o f t h e S u r v e i l l a n c e should be determined a n d t h e a p p r o p r i a t e channel(s1 t h a t are required i n the current MODE or c o n d i t i o n should be decl a r e d inoperabl e .

The ireqlrency i s based u p o n o p e r a t i n g e x p e r i e n c e t h a t d e m c v s t r a t e s channel f a i l u r e i s r a r e . The C H A N N E L C H E C K supplements l e s s f o r m a l , b u t more f r e q u e n t , checks o f c h a n v e l s d u r i n g normal o p e r a t i o n a l use o f t h e d i s p l a y s a s s o c i a t e d w i t h t h e c h a n n e l s r e q u i r e d by t h e LCO.

continued:

GRAAJD G U L F a 3.S-f?,a LDC 06007 I

RPS instrumentatiot-8 3.3.1.:

BASES S U R V E i LLANC: SR. 3.3.1.1.3 (continued]

REQU i REMEMTS A Frequency o f 7 days provides an acceptable level o f system average availability over t h e Frequency interval and is based on reliability analysis (Ref. 9).

SR 3.3.1.1.4 A C H A N N E L F U l \ r C T I O V A L T E S T is performed on each requ-ired channel to ensure that t h e entire channel will perform the intended Function. A Frequency of 7 days provides an acceptable level o f system averacje availability over the Frequency and is based on the reliability analysis o f Reference 9. (The Manual Scram Function's C H A N N E L F U N C T I O N A L T E S T Frequency was credited in t h e analysjs t o extend many automatic scram Functions' Frequencies.)

SR 3.3.1.1.5 a n d S R 3.3.1.1.6 Deleted

RPS I n s t r u m e n t a t i on B 3.3.1.1 BASES SU R V E I L LANC E SR 3.3.1.1.7 I REQUIREMENTS

( c o n t i nued j LPRM g a i n s e t t i n g s a r e o e t e r m i r i e d f r o m t h e C o r e p o w e r I d i s t r i b u t i o n c a l c u l a t e d by t h e Core Performance M o n i t o r i n g skstem based on t h e l o c a l f l u x p r o f i l e s measured b y t h e T r a v e r s i n g I n c o r e Probe ( T I P ) System. T h i s e s t a b l i s h e s t h e r e 1 a?;i ve 1o c a l f l ux p r o f i 1e f o r a p p r o p r i a t e r e p r e s e n t a t i v e i n p u t t o t h e A P R M S y s t e m . T h e 1000 M W D / T F r e q u e n c y i s b a s e d on o p e r a t i n g e x p e r i e n c e \ k i t h LPRM s e n s i t i v i t y c h a n g e s .

SR 3.3.1.1.8 and S R 3.3.1.1.11 A CHANNEL FUNCTIONAL TEST i s p e r f o r m e d on e a c h r e q u i r e d channel t o ensure t h a t t h e e n t i r e channel w i l l perform t h e i n t e n d e d f u n c t i o n . Any s e t p o i n t a d j u s t m e n t s h a l l be c o n s i s t e n t w i t h t h e assumptions o f t h e c u r r e n t p l a n t s p e c i f i c s e t p o i n t m e t h o d o l o g y . The 9 2 d a y F r e q u e n c y o f SR 3 . 3 . 1 . 1 . 8 i s based on t h e r e l i a b i l i t y a n a l y s i s o f R e f e r e n c e 9.

The 18 m o n t h F r e q u e n c y i s b a s e d on t h e n e e d t o p e r f o r m t h i s S u r v e i l l a n c e under t h e c o n d i t i o n s t h a t a p p l y d u r i n g a p l a n t o u t a g e a n d t h e p o t e r , t i a l f o r an u n p l a v n e d t r a n s j e n t i f t h e S u r v e i l l a n c e were performed w i t h t h e r e a c t o r a t power.

O p e r a t i n g e x p e r i e n c e h a s shown t h a t t h e s e c o r n p o n e 6 t s u s u a l l y p a s s t h e S u r v e i l l a n c e when p e r f o r m e d a t t h e 18 n o n t h Frequency.

ECCS I n s t r u m e n t a t i o n s 3.3.5.1 BASES BACKGROUND Diesel Generators (continued]

F e a t u r e ( E S F ) buses i f a l o s s o f o f f s i t e power o c c u r s .

( R e f e r t o B a s e s f o r LCO 3.3.8.1.)

A P P L I CAB L E T h e a c t i o n s o f t h e E C C S a r e e x p l i c i t l y assumed i n t h e s a f e t y SAFETY ANALYSES, a n a l y s e s o f R e f e r e n c e s 1, 2 , a n d 3. T h e E C C S i s i n i t i a t e d LCO, a n d t o preserve t h e i n t e g r i t y o f t h e f u e l cladding by l i m i t i n g APPLICABILITY t h e p o s t LOCA p e a k c l a d d i n g t e m p e r a t u r e t o l e s s t h a n t h e 10 CFR 5 0 . 4 6 l i m i t s .

E C C S i n s t r u m e n t a t i o n s a t i s f i e s C r i t e r i o n 3 o f t h e NRC P o l i c y Statement. Certain instrumentation Functions are retained f o r o t h e r reasons and a r e d e s c r i b e d b e l o w i n t h e i n d i v i d u a l Functions discussion.

The OPERABILITY o f t h e E C C S i n s t r u m e n t a t i o n i s d e p e n d e n t u p o n t h e OPERABILITY o f t h e i n d i v i d u a l i n s t r u m e n t a t i o n c h a n n e l F u n c t i o n s s p e c i f i e d i n T a b l e 3.3.5.i-1. E a c h F u n c t i o n m u s t h a v e a r e q u i r e d n u m b e r o f OPERA%BLE c h a n n e l s ,

w i t h t h e j r s e t p o i n t s w i t h i n t h e s p e c i f i e d Allowable Values, where a p p r o p r i a t e . The a c t u a l s e t p o i n t i s c a l i b r a t e d c o n s i s t e n t w i ti: a p p l i c a b l e s e t p o i n t m e t h o d o l o g y a s s u m p t i o n s .

E a c h E C C S s u b s y s t e m m u s t a l s o r e s p o n d w i t h i n i t s assuiried respcnse t i m e . T a b l e 3.3.5.1-1. i s m o d i f i e d by two footnotes. F o o t n o t e ( a ) i s added t o c l a r i f y t h a t t h e a s s o c i a t e d f u n c t i o n s a r e r e q u i r e d t o b e OPERABLE i n M O D E S 4 a n d 5 o n l y when t h e i r s u p p o r t e d E C C S a r e r e q u i r e d t o be OPERABLE p e r LCO 3 . 5 . 2 , ECCS-Shutdown. F o o t n o t e ( b ) i s a d d e d t o show t h a t c e r t a i n E C C S i n s t r u m e n t a t i c n F u n c t i o n s a l s o p e r f o r m DG i n i t i a t i o n . I A l l o w a b l e Values a r e s p e c i f i e d f o r each ECCS F u n c t i o n s p e c i f i e d i n t h e t a b l e . Nominal t r i p s e t p o i n t s a r e s p e c i f i e d i n tk,e setpoint calculations. The n o m i n a l s e t p o i n t s a r e s e l e c t e d t o e n s G r e tha: t h e s e t p o i n t s do n o t e x c e e d t h e A 1 1 o w a b l e V a l u e b e t w e e n C H A N N E L CALIBR4,TIONS.

Operation w i t h a trp setpoint less cgnservative than tne nominal t r i p s e t s o i f i t , b u t w i t h i n i t s A l l o w a b l e Value, i s acceptable. A channel i s i n o p e r a b l e i f i t s a c t u a l t r i p s e t p c i n t i s n o t w i t h i n i t s r e q u i r e d A l l o w a b l e dalue. T r i p s e t p o i n t s a r e those predetermined values o f output a t which an a c t i o n s h o u l d t a k e p l a c e . T h e s e t p o i n t s a r e c o m p a r e d t o t h e actual process parameter i e . g . , r e a c t o r vessel water i w e l 1 , a n d when t h e m e a s u r e d o u t l ; g t v a l g e o f t h e p r o c e s s

ECCS i n s t r u n e n t a t i o n B 3.3.5.1 BASES APPLICABLE p a r a m e t e r e x c e e d s tile s e t p o i n t , t h e a s s o c i a t e d d e v i c e ( e . g . , I S A F E T Y ANALYSES, t r i p u n i t ) c h a n g e s s t a t e . The a n a l y t i c l i m i t s a r e d e r i v e d LCO, and from t ' i e l i m i t i n g v a l u e s o f t h e p r o c e s s p a r a m e t e r s o b t a i n e d APPLICABILITY from t h e s a f e t y a n a l y s i s . The A l l o w a b l e V a l u e s a r e d e r i v e d (continued) from t h e a n a l y t i c l i m i t s , c o r r e c t e d f o r c a l i b r a t i o n ,

p r o c e s s , a n d some of t h e i n s t r u m e n t e r r o r s . The t r i p s e t p o i n t s a r e t h e n d e t e r m i n e d , a c c o u n t i n g f o r t h e remaining i n s t r i ; m e n t e r r o r s ( e . g . , d r i f t ) . The t r i p s e t p o i n t s d e r i v e d i n t h i s manner p r o v i d e a d e q u a t e p r o t e c t i o n b e c a u s e instrumentation u n c e r t a i n t i e s , process e f f e c t s , calibration to1 e r a n c e s , i n s t r u m e n t d r i f t , and s e v e r e e n v i ronment e r r o r s

( f o r c h a n n e l s t h a t must f u n c t i o n i n h a r s h e n v i r o n m e n t s a s d e f i n e d by 10 C F R 5 0 . 4 9 ) a r e a c c o u n t e d f o r .

I n g e n e r a l , t h e i n d i v i d u a l F u n c t i o n s a r e r e q u i r e d t o be O P E R A B L E i n t h e MODES o r o t h e r s p e c i f i e d c o n d i t i o n s t h a t may r e q u i r e E C C S ( o r D G ) i n i t i a t i o n t o m i t i g a t e t h e consequences o f a d e s i g n b a s i s a c c i d e n t o r t r a n s i e n t . To e n s u r e r e l i a b l e ECCS a n d DG f u n c t i o n , a combination of F u n c t i o n s i s r e q u i r e d t o provide primary a n d secondary i n i t i a t i o n s i g n a l s .

The s p e c i f i c A p p l i c a b l e S a f e t y A n a l y s e s , LCO, a n d A p p l i c a b i l i t y d i s c u s s i o n s a r e l i s t e d below o n a F u n c t i o n b y Function b a s l s .

Low P r e s s u r e Core S p r a v a n d Low p r e s s u r e C o o l a n t I n , l ; e c t i o n Svsterns 1.a. 2.a. R e a c t o r Vessel Water Level-Lcizi l - 3 ~Lo,.i. Level 1 Lcw r e a c t o r p r e s s u r e v e s s e l ( R P V ! w a t e r i e v e l i n d i c a t e s t h a t t h e c a p a b i l i t y t o cool t h e f u e l may be t h r e a t e n e d . S h o u i d PPV w a t e r l e v e l d e c r e a s e t o o f a r , f u e l damage c o u l d r e s d l t .

The low p r e s s u r e E C C S and a s s o c i a t e d DGs a r e i n i t i a t e d a t Level 1 t o e n s u r e t h a t c o r e s p r a y a n d f l o o d i n r j f u n c t i o n s a r e a v a i l a b l e t o p r e v e n t o r m i n i m i z e f u e l damage. The R e a c t o r b e s s e l ihiater Level - L o w Low Low, Level 1 i s one of t h e F u n c t i o n s assumed t o be O P E R A B L E a n d c a p a b l e of i n i t i a t i n g t h e E C C S d u r i n g t h e t r a r i s i e n t s ar;d a c c i d e n t s a n a l y z e d i n R e f e r e n c e s 1 , 2 , a n d 3 . The c o r e c o o l i n g f u n c t i o n of t h e ECCS, a l o n g w i t h t h e scram a c t i o n o f t h e R e a c t o r P r o t e c t j s n System ( R P S ) , e n s u r e s t h a t t h e f u e l p e a k c l a d d i n g t e m p e r a t u r e r e m a i n s below t h e l i m i t s o f 10 C F R 5G.40.

ECCS I n s t r u m e n t a t i o n B 3.3.5.1 BASES APPLICABLE 1.a. 2.a. R e a c t o r k e s s e l W a t e r L ~ v e l - L o ~Low Low. L e v e l 1 SAFETY ANALYSES, (continued)

LCO, a n d APPLICABILITY R e a c t o r V e s s e l W a t e r L e v e l - L o w Low Low, L e v e l 1 s i g n a l s a r e i n i t i a t e d f r o m f o u r l e v e l t r a n s m i t t e r s t h a t sense t h e d i f f e r e n c e between r h e p r e s s u r e due t o a c o n s t a n t column o f w a t e r ( r e f e r e n c e l e g ) and t h e p r e s s u r e due t o t h e a c t u a l water level (variable l e g ) i n the vessel.

T h e R e a c t o r V e s s e l W a t e r L e v e l - L o w Low Low, L e v e l 1 A l l o w a b l e V a l u e i s c h o s e n to a l l o w t i m e f o r t h e l o w p r e s s u r e c o r e f l o o d i n g systems t o a c t i v a t e and p r o v i d e adequate c o o l in g .

Two c h a n n e l s o f R e a c t o r V e s s e l W a t e r L e v e l - L o w Low Low, Level 1 Function per associated D i v i s i o n are o n l y r e q u i r e d t o b e OPERABLE h h e n t h e a s s o c i a t e d E C C S i s r e q u i r e d t o b e OPERABLE, t o e n s u r e t h a t n o s i n g l e i n s t r u m e n t f a i l u r e c a n p r e c l u d e E C C S i n i t i a t i o n . (Two c h a n n e l s i n p u t to LPCS a n d L P C I A , w h i l e t h e o t h e r t w o c h a n n e l s i n p u t t o LPCI B a n d LPCI C . ) Per F o o t n o t e ( a ) t o T a b l e 3 . 3 . 5 . 1 - 1 , t h i s ECCS f u n c t i o n i s o n l y r e q u i r e d t o b e OPERABLE i n MODES 4 a n d 5 w h e n e v e r t h e a s s o c i a t e d E C C S i s r e q u i r e d t o b e OPERABLE p e r LCO 3 . 5 . 2 . R e f e r t o L C O 3 . 5 . 1 a n d LCO 3 . 5 . 2 , " E C C S -

S h u t d o w n , " f o r A p p l i c a b i 1 it y B a s e s f o r t h e l o w p r e s s u r e E C C S s u b s y s t e m s ; LCO 3 . 8 . 1 , " A C S o u r c e s - O p e r a t i n g " ; and LCO 3 . 8 . 2 , " A C S o u r c e s - S h u t d o w n , " f o r A p p l i c a b i l i t y Bases f o r t h e DGs.

1. b , 2 . 0 . Drvwel1 Pressure-Hi qh High pressure i n the drywell could i n d i c a t e a break i n the r e a c t o r c o o l a n t pressure boundary (RCPB). The l o w p r e s s u r e E C C S and a s s o c i a t e d DGs a r e i n i t i a t e d u p o n r e c e i p t o f t h e Drywell Pressure-tiigh Function i n order t o minimize t h e p o s s i b i l i t y o f f u e l damage. The c o r e c o o l i n g f u n c t i o n o f t h e E C C S , a l o n g v i i t h t h e scram a c t i o n o f t h e RPS, e n s u r e s t h a t t h e f u e l peak. c l a d d i n g t e m p e r a t u r e r e m a i n s b e l o w t h e l i m i t s o f 10 CFR 5 0 . 4 6 .

High dryweil pressure signals are i n i t i a t e d frcm four p r e s s u r e t r a n s m i t t e r s t h a t s e n s e d r y w e l l p r e s s u r e . The A l l o w a b l e \ j a l u e was s e l e c t e d t o b e a s l o w as p o s s i b l e a n d b e i n d i c a t i v e o f a LOCA i n s i d e p r i m a r y c o n t a i n m e n t . N e g a t i i l e barometric f l u c t y a t i o n s are accounted f o r i n t h e Allowable Val ue.

ECCS Instrumentation B 3.3.5.1 BASES APPLiCABLE 1.0. 2.b. D r v w e l l Pressure-HiQh (continued) I SAFETY ANALYSES, LCO, and The D r y w e l l P r e s s u r e - H i g h F u n c t i o n i s r e q u i r e d t o be APPLICABILITY OPERABLE when t h e a s s o c i a t e d E C C S and DGs a r e r e q u i r e d t o be OPERABLE i n c o n j u n c t i o n w i t h t i m e s when t h e p r i m a r y c o n t a i n m e n t i s r e q u i r e d t o be OPERABLE. T h u s , f o u r c h a n n e l s o f t h e LPCS and LPCI D r y w e l l P r e s s u r e - H i g h F u n c r i o n a r e r e q u i r e d t o be OPERABLE i n M O D E S 1, 2 , and 3 t o e n s u r e t h a t no s i n g l e i n s t r u m e n t f a i l u r e can p r e c l u d e E C C S i n i t i a t i o n .

(Two c h a n n e l s i n p u t t o LPCS and LPCI A , w h i l e t h e o t h e r t h o c h a n n e l s i n p u t t o LPCI B and LPCI C.) I n M O D E S 4 and 5 , t h e Drywell Pressure-High Function i s not required since there i s i n s u f f i c i e n t energy i n t h e r e a c t o r t o p r e s s u r i z e t h e primary containment t o Drywell Pressure-High setpoint.

Refer t o LCO 3 . 5 . 1 f o r A p p l i c a b i l i t y Bases f o r t h e low p r e s s u r e E C C S s u b s y s t e m s and t o LCO 3 . 8 . 1 f o r A p p l i c a b i l i t y Bases f o r t h e D G s .

1.c. 2.c. Low P r e s s u r e C o o l a n t I n . i e c t i c n Pump A and Pump B Start-Tine Del av Re1 ay The p u r p o s e o f t h i s t i m e d e l a y i s t o s t a g g e r t h e s t a r t o f t h e t w o E C C S pumps t h a t a r e i n each o f D i v i s i o n s 1 and 2 ,

t h u s l i m i t i n g t h e s t a r t i n g t r a n s i e n t s on t h e 4.i6 kV emergency b u s e s . T h i s F u n c t i o n i s o n l y n e c e s s a r y when power i s b e i n g s u p p l i e d f r o m t h e s t a n d b y power s o u r c e s ( D G ) .

However, s i n c e t h e t i m e d e l a y does n o t d e g r a d e E C C S o p e r a t i o n , i t r e m a i n s i n t h e pump s t a r t l o g i c a t a i l t i m e s .

The LPCI Pump S t a r t - T i m e D e l a y R e l a y s a r e assumed t o be OPERABLE i n t h e a c c i d e n t and t r a n s i e n t a n a l y s e s r e q u i r i n g E C C S i n i t i a t i o n . T h a t i s , t h e a n a l y s i s assumes t h a t t h e pumps w i l l i n i t i a t e when r e q u i r e d .

T h e r e a r e t w o LPCI Pump S t a r t - T i m e Delay R e l a y s , one i n e a c h o f t h e RHR " A " and R H R " B " pump s t a r t l o g i c c i r c u i t s .

The A l l o w a b l e V a l u e f o r t h e LPCI Pump S t a r t - T i m e D e l a y R e l a y i s c h o s e n t o be s h o r t enough s o t h a t E C C S o p e r a t i o n i s n o t degraded.

Each LPCI Pump S t a r t - T i m e D e l a y R e l a y F u n c t i o n i s o n l y r e q u i r e d t o be OPERABLE when t h e a s s o c i a t e d LPCI s u b s y s t e m i s r e q u i r e d t o be OPERABLE. P e r F o o t n o t e ( a ) t o T a b l e 3 . 3 . 5 . 1 - 1 , t h i s E C C S f u n c t i o n i s o n l y r e q u i r e d t o be OPERABLE i n N O D E S 4 aqd 5 whenever t h e a s s o c i a t e d E C C S i s r e q u i r e d t o be OPERABLE p e r LCO 3 . 5 . 2 . R e f e r t o LCO 3.5.1 and LCO 3 . 5 . 2 f o r A p p l i c a b i l i t y Bases f o r t h e LPCI subsystems.

ECCS Instrumenta'ion B 3.3.5.1 BASES APPL! CABLE 1.d. 2.d. R e a c t o r Vessel Pressure-Low (Iniection SAFETY ANALYSES, Permissive)

LCO, a n d APPLICABILITY Low r e a c t o r v e s s e l p r e s s u r e s i g n a l s a r e u s e d a s p e r m i s s i v e s (continued) f o r t h e l o w p r e s s u r e ECCS subsystems. T h i s e n s u r e s t h a t ,

p r i o r t o o p e n i n g t h e i n j e c t i o n v a l v e s o f t h e low p r e s s u r e ECCS s u b s y s t e m s , t h e r e a c t o r p r e s s u r e has f a l l e n t o a v a l u e b e l o w t h e s e s u b s y s t e m s ' maximum d e s i g n p r e s s u r e . The R e a c t o r V e s s e l P r e s s u r e - L o w i s o n e o f t h e F u n c t i o n s assumed t o b e OPERABLE a n d c a p a b l e o f p e r m i t t i n g i n i t i a t i o n o f t h e ECCS d u r i n g t h e t r a n s i e n t s a n a l y z e d i n References 1 and 3.

I n a d d i t i o n , t h e Reactor Vessel Pressure-Low F u n c t i o n i s d i r e c t l y assumed i n t h e a n a l y s i s o f t h e r e c i r c u l a t i o n 1 i n e b r e a k ( R e f . 2). T h e c o r e c o o l i n g f u n c t i o n o f t h e E C C S ,

a l o n g w i t h t h e scram a c t i o n o f t h e RPS, ensures t h a t t h e f u e l peak c l a d d i n g t e m p e r a t u r e remains below t h e l i m i t s o f 10 C F R 5 0 . 4 6 .

The R e a c t o r Vessel P r e s s u r e - L o w s i g n a l s a r e i n i t i a t e d f r o m f o u r p r e s s u r e t r a n s m i t t e r s t h a t sense t h e r e a c t o r p r e s s u r e .

The f o u r p r e s s u r e t r a n s m i t t e r s e a c h d r i v e a m a s t e r a n d s l a v e t r i p unit i f o r a total of eight t r i p units).

The A l l o w a b l e V a l u e i s ?ow enough t o p r e v e n t o v e r p r e s s u r i z i n g t h e equipment i n t h e loid p r e s s u r e ECCS, b u t h i g h e n o u g h t o e n s u r e t n a t t h e ECCS i n j e c t i o n p r e v e n t s t h e f u e l peak c l a d d i n g t e m p e r a t u r e f r o m e x c e e d i n g t h e i i m i t s o f 10 CFR 5 0 . 4 6 .

Three channels o f Reactor Vessel Pressure-Low F u n c t i o n p e r a s s o c i a t e d D i v i s i o n a r e o n l y r e q u i r e d t o b e OPERABLE when t h e a s s o c i a t e d E C C S i s r e q u i r e d t o b e OPERABLE t o e n s u r e t h a t no s i r t g l e i n s t r u m e n t f a i l u r e can p r e c l u d e ECCS initiation. ( T h r e e c h a n n e l s a r e r e q u i r e d f o r LPCS a n d LPCI A , w h i l e t h r e e o t h e r c h a n n e l s a r e r e q u i r e d f o r LPCI B a n d LPCI C . 1 P e r F o o t n o t e ( a ) t o T a b l e 3 . 3 . 5 . 1 - 1 , t h i s ECCS f u n c t i o n i s o n l y r 9 q u i r e d t o b e OPERABLE i n MODES 4 a n d 5 w h e n e v e r t h e a s s o c i a t e d E C C S i s r e q u i r e d t o b e OPERABLE p e r LCO 3 . 5 . 2 . R e f e r t o LCO 3 . 5 . 1 and LCO 3 . 5 . 2 f o r A p p l i c a b i 1 iti; Bases f o r t h e l o w p r e s s u r e ECCS s u b s y s t e m s .

ECCS Instrumentation 3 3.3.5.1 BASES APPLICABLE 1 . e . l . f , 2 . e . L o w p r e s s u r e Coolant 1 n . i e c t i o n a n d Low S A F E T Y ANALYSES, P r e s s u r e Ccre Sprav P u m p D i s c h a r s e Flow-Low ( B y p a s s 1 LCO, and APPLICABi L I T Y The minimum f l o w i n s t r u m e n t s a r e provided t o p r o t e c t t h e (continued) a s s o c i a t e d low p r e s s u r e E C C S pump from o v e r h e a t i n g when t h e pump i s o p e r a t i n g a n d t h e a s s o c i a t e d i n j e c t i o n v a l v e i s n o t f u l l y open. The minimum f l o w l i n e v a l v e i s opened when l o w flow i s s e n s e d , a n d t h e v a l v e i s a u t o m a t i c a l l y c l o s e d when

E C C S I n s t r u m e n t a t i on 6 3.3.5.1 BASES A P P LICABLE 1.4. 2 . f . Manual I n i t i a t i o n (continued)

SAFETY ANALYSES, LCO, and i n s t r u m e n t a t i o n . T h e r e i s one p u s h b u t t o n f o r e a c h o f t h e APPLICABILITY t w o D i v i s i o n s o f l o w p r e s s u r e E C C S ( i. e . , D i v i s i o n 1 E C C S ,

LPCS and LPCI A ; D i v i s i o n 2 E C C S , LPCI B and LPCI Cl.

The Manual I n i t i a t i o n F u n c t i o n i s n o t assumed i n any a c c i d e n t o r t r a n s i e f i t a n a l y s e s i n t h e UFSAR. However, t h e F u n c t i o n i s r e t a i n e d f o r t h e l o w p r e s s u r e E C C S f u n c t i o n as r e q u i r e d by t h e N R C i n t h e p l a n t l i c e n s i n g b a s i s .

T h e r e i s no A l l o w a b l e V a l u e f o r t h i s F u n c t i o n s i n c e t h e c h a n n e l s a r e m e c h a n i c a l l y a c t u a t e d b a s e d s o l e l y on t h e p o s i t i o n o f t h e p u s h b u t t o n s . Each c h a n n e l o f t h e Manual I n i t i a t i o n Function (one channel per D i v i s i o n ) i s o n l y r e q u i r e d t o b e OPERABLE when t h e a s s o c i a t e d E C C S i s r e q u i r e d t o be OPERABLE. Per F o o t n o t e ( a ) t o T a b l e 3 . 3 . 5 . 1 - 1 , t h i s E C C S f u n c t i o n i s o n l y r e q u i r e d t o be OPERABLE i n M O D E S 4 and 5 whenever t h e a s s o c i a t e d E C C S i s r e q u i r e d t o be OPERABLE p e r LCO 3 . 5 . 2 . R e f e r t o LCO 3 . 5 . 1 and LCO 3 . 5 . 2 f o r A p p l i c a b i l i t y Bases f o r t h e l o w p r e s s u r e E C C S s u b s y s t e m s .

H i s h P r e s s u r e Core S o r a v Svstem 3.a. R e a c t o r V e s s e l iriater Level-Low Low. L e v e l 2 Low R P V w a t e r l e v e l i n d i c a t e s t h a t t h e c a p a b i l i t y t o c o o l t h e f u e l may be t h r e a t e n e d . S h o u l d RPV w a t e r l e v e l d e c r e a s e t o o far, f u e l damage c o u l d r e s u l t . T h e r e f o r e , t h e H P C S System and a s s o c i a t e d DG a r e i n i t i a t e d a t L e v e l 2 , a f t e r a c o n f i r m a t i o n d e l a y p e r m i s s i v e t o m a i n t a i n l e v e l above t h e top o f the actjve fuel.

A n o m i n a l 1/2 second C o n f i r m a t i o n del;y p e r m i s s i v e i s i n s t a l l e d t o avoid spurious system i n i t i a t i o n s i g n a l s . This c o n f i r i r i a t i o n d e l a y p e r m i s s i v e i s l i m i t e d t o a maximum of a 1 second d e l a y t o s u p p o r t t h e H P C S Systeri: r e s p o n s e t i m e o f 3 2 seconds assumed i n t h e a c c i d e n t a n a l y s i s . T o i n s u r e t h a t t h e c o n f i r n a t i o n d e l a y p e r m i s s i v e does n o t d r i f t e x c e s s i v e l y i t i s c a l i b r a t e d a s p a r t o f t h e CHANNEL FLJb!CTIONAL T E S T r e q u i r e d f o r t h i s F u n c t i o n by S!? 3.2.5.1.2. The R e a c t o r Vessel N a t e r L e v e l -Low L o w , L e v e l 2 i s one o f t h e F u n c t i o n s assumed t o b e O F E i l A B i E and c a p a b l e o f i n i t i a t i n g H P C S d u r i n g t h e t r a n s i e n t s and a c c i d e n t s , a n a l y z e d i n R e f e r e n c e s 1, 2 ,

i c o n t i niied;

ECCS IFstrumentation B 3.3.5.1 BASES A?PLICABLE 3 . a . Reactor Vessel Water Level-Low Low. Level 2 SAFETY A N A L Y S E S , (continued)

LCO, and APPLICABILITY a n d 3 . The c o r e c o o l i n g f u n c t i o n of t h e E C C S , a l o n g with t h e scram a c t i o n of t h e R P S , e n s u r e s t h a t t h e f u e l peak c l a d d i n g t e m p e r a t u r e remains below t h e l i m i t s of 10 CFR 50.46.

Reactor Vessel Water Level-Low Low, Level 2 s i g n a l s a r e i n i t i a t e d from f o u r l e v e l t r a n s m i t t e r s t h a t s e n s e t h e d i f f e r e n c e between t h e p r e s s u r e due t o a c o n s t a n t column o f water ( r e f e r e n c e l e g ) a n d t h e p r e s s u r e due t o t h e a c t u a l water level ( v a r i a b l e l e g ) i n the v e s s e l .

< c o r ? t i nuea:

GRAND GULF 3 3.3-35a L D C C60C7

ECCS-Operating B 3.5.1 BASES (continued)

SURVEILLANCE SR 3.5.i.l REQUIREMENTS The f l o w p a t h p i p i n g has t h e p o t e n t i a l t o d e v e l o p v o i d s a n d p o c k e t s o f e n t r a i n e d a i r . M a i n t a i n i n g t h e pump d i s c h a r g e l i n e s o f t h e HPCS S y s t e m , LPCS S y s t e m , a n d LPCI s u b s y s t e m s f u l l of water e n s u r e s t h a t the systems w i l l perform p r o p e r l y , i n j e c t i n g t h e i r f u l l c a p a c i t y i n t o t h e R C S upon demand. T h i s w i l l a l s o p r e v e n t a w a t e r hammer folloinling a n E C C S i n i t i a t i o n s i g n a l . One a c c e p t a b l e method o f e n s u r i n g t h e l i n e s a r e f u l l i s t o v e n t a t t h e h i g h p o i n t s . The 31 day Frequency i s b a s e d on o p e r a t i n g e x p e r i e n c e , on t h e p r o c e d u r a l c o n t r o l s g o v e r n i n g s y s t e m o p e r a t i o n , and on t h e gradual n a t u r e of void b u i l d u p i n t h e ECCS p i p i n g .

SR 3.5.1.2 V e r i f y i n g t h e c o r r e c t a l i g n m e n t f o r m a n u a l , power o p e r a t e d ,

a n d a u t o m a t i c v a l v e s i n t h e ECCS f l o w p a t h s p r o v i d e s assurance t h a t t h e proper flow p a t h s w i l l ex.ist f o r ECCS o p e r a t i o n . T h i s S R does n o t apply t o v a l v e s t h a t a r e locked, s e a l e d , or otherwise secured i n p o s i t i o n s i n c e these v a l v e s were v e r i f i e d t o be i n t h e c o r r e c t p o s i t i o n p r i o r t o I o c k j n g , s e a l i n g , o r s e c u r i n g . A v a l v e t h a t r e c e i v e s an.

i n i t i a t i o n s i g n a l i s a l l o w e d t o be i n a n o n a c c i d e n t p o s i t i o n provided t h e valve w i l l a u t o m a t i c a l l y r e p o s i t i o n i n t h e p r o p e r s t r o k e t i m e . T h i s SR d o e s n o t r e q u i r e any t e s t i n g o r valve manipulation; r a t h e r , i t involves v e r i f i c a t i o n t h a t t h o s e v a l ves p o t e n t i a 1 l y c a p a b l e o f bei n g mi s p o s i t i o n e d a r e i n t h e c o r r e c t p o s i t i o n . T h i s SR d o e s n o t a p p l y t o v a l v e s t h a t c a n n o t be i n a d v e r t e n t l y m i s a l i g q e d , s u c h a s check Val v e s .

The 31 day Frequency o f t h i s SR was d e r i v e d from t h e I n s e r v i c e i e s t i n g Program r e q u l r e m e n t s f o r p e r f o r m i n g v a l v e t e s t i n g a t l e a s t once e v e r y 9 2 d a y s . The Frequency of 31 days i s f u r t h e r j u s t i f i e d because t h e v a l v e s a r e o p e r a t e d under p r o c e d u r a l c o n t r o l a n d b e c a u s e i m p r o p e r v a l v e a l i g n m e n t would o n l y a f f e c t a s i n g l e s u b s y s t e m . T h i s Frequency has been shown t o be a c c e p t a b l e t h r o u g h c p s r a t i n g experience.

L P C I s u b s y s t e m s may be c o n s i d e r e d O P E R A B L E d u r i n g a 1 ignment I a n d o p e r a t i o n f o r d e c a y h e a t removal w i t h r e a c t o r s t e a m dome p r e s s u r e l e s s t h a n t h e R H R c u t i n p e r n i s s i v e p r e s s u r e i n MOQE 3 , i f GRAN3 GULF E 3.5-9 LDC 06307

E C C S - Shutdcwn B 3.5.2 SASES S U R V E I i LA N C E SR 3.5.2.4 (continued)

REQUIREMENTS i n i t i a t i o n s i g n a l i s a l l o w e d t o be i n a n o n a c c i d e n t p o s i t i o n p r o v i d e d t h e v a l v e wi 1 1 a u t o m a t i c a l l y r e p o s i t i o n i n t h e p r o p e r s t r o k e t i m e . T h i s S R d o e s n o t r e q u i r e any t e s t i n g o r valve manipulation; r a t h e r , i t involves v e r i f i c a t i o n t h a t t h o s e v a l v e s c a p a b l e of p o t e n t i a l l y b e i n g m i s p o s i t i o n e d a r e i n t h e c o r r e c t p o s i t i o n . This SR does not apply t o valves t h a t c a n n o t be i n a d v e r t e n t l y m i s a l i g n e d , s u c h as check v a l v e s . The 31 day Frequency i s a p p r o p r i a t e b e c a u s e t h e v a l v e s a r e o p e r a t e d u n d e r p r o c e d u r a l c o n t r o l and t h e p r o b a b i l i t y o f t h e i r being m i s p o s i t i o n e d during t h i s time p e r i o d i s low.

I n MODES 4 a n d 5 , t h e RHR System may o p e r a t e i n t h e shutdown c o o l i n g mode, o r be a l i g n e d t o a l l o w a l t e r n a t e means t o remove d e c a y h e a t a n d s e n s i b l e h e a t f r o m t h e r e a c t o r .

T h e r e f o r e , RHR v a l v e s t h a t a r e r e q u i r e d f o r L P C I subsystem o p e r a t i o n may be a l i g n e d f o r d e c a y h e a t r e m o v a l . One L P C I s u b s y s t e m of t h e R H R System may be c o n s i d e r e d OPERABLE f o r t h e ECCS f u n c t i o n i f a l l t h e r e q u i r e d v a l v e s i n t h e L P C I f l o w p a t h can be m a n u a l l y r e a l i g n e d ( r e m o t e o r l o c a l 1 t o allold i n j e c t i o n i n t o t h e R P \ I a n d t h e s y s t e m i s n o t o t h e r w i s e inoperable. This w i l l ensure adequate core cooling i f a n i n a d v e r t e n t v e s s e l d r a i ndown s h o u l d o c c u r .

PCIVS B 3.6.1.3 BASES SURVEILLANCE SR 3.6.1.3.3 (continued)

REQUIREMENTS t o e n s u r e t h a t p o s t a c c i d e n t l e a k a g e of r a d i o a c t i v e f l u i d s o r g a s e s o u t s i d e t h e primary containment boundary i s within d e s i g n l i m i t s . For d e v i c e s i n s i d e primary c o n t a i n m e n t ,

d r y w e l l , o r steam t u n n e l , t h e Frequency o f " p r i o r t o e n t e r i n g M O D E 2 o r 3 from MODE 4 , i f n o t performed w i t h i n t h e previous 92 d a y s " , i s appropriate since these devices a r e o p e r a t e d under a d m i n i s t r a t i v e c o n t r o l s a n d t h e probabi 1 it y o f t h e i r mi s a l i gnment i s 1 ow.

Two Notes a r e added t o t h i s SR. The f i r s t Note a l l o w s v a l v e s a n d b l i n d f l a n g e s l o c a t e d i n high r a d i a t i o n a r e a s t o be v e r i f i e d by use of a d m i n i s t r a t i v e c o n t r o l s . Allowing v e r i f i c a t i o n by a d m i n i s t r a t i v e c o n t r o l s i s c o n s i d e r e d acceptable since access t o these areas i s typically r e s t r i c t e d during MODES 1 , 2 , a n d 3 . Therefore, the p r o b a b i l i t y of misalignment o f t h e s e d e v i c e s , once they have been v e r i f i e d t o be in t h e i r proper p o s i t i o n , i s l o w . A second Noce i s i n c l u d e d t o c l a r i f y t h a t P C I V s t h a t a r e open under a d m i n i s t r a t i v e c o n t r o l s a r e r,ot r e q u i r e d t o meet t h e S R d u r i n g t h e t i m e t h a t t h e PCIVs a r e open. T h i s SR does not a p p l y t o v a l v e s t h a t a r e l o c k e d , s e a l e d , o r o t h e r w i s e s e c u r e d i n t h e c l o s e d p o s i t i o n , s i n c e t h e s e were v e r i f i e d to be i n t h e c o r r e c t p o s i t i o n u p o n l c c k i n g , s e a l i n g , or securing.

SR 3.6.1.3.4 V e r i f y i n g t h e i s o l a t i o n time o f each power o p e r a t e d ,

a u t o m a t i c P C i V i s w i t h i n l i m i t s i s r e q u i r e d t o demonstrate OPERABILITY. MSIVs may be excluded from t h i s S R s i n c e MSIV f u l l c l o s u r e i s o l a t i o n time i s d e n o n s t r a t e d b y S R 3 . 6 . 1 . 3 . 6 .

The i s o l a t i o n time t e s t e n s u r e s t h a t t h e v a l v e w i l l i s o l a t e i n a time period l e s s t h a n o r equal t o t h a t assumed i n t h e s a f e t y a n a l y s i s . G e n e r a l l y , PCIVs i n a d i r e c t l e a k p a t h

( o p e n p a t h from containment t o e n v i r o n s ) must c l o s e more r a p i d l y t h a n PCiVs i n i n d i r e c t l e a k p a t h s . Maximum i s o l a t i o n times a r e based o n system p2rformance r e q u i r e m e n t s , equipment q u a l i f i c a t i o n , r e g u l a t o r y r e q u i r e m e n t s , o r o f f s i t e dose a n a l y s e s f o r s p e c i f i c a c c i d e n t s . These requirements e n s u r e t h e r a d i o l o g i c a l consequences d o n o t exceed t h e g u i a e i i n e v a l u e s e s t a b l i s h e d

Secondary Containment B 3.6.4.1 BASES SURVEILLANCE SR 3.6.4.1.3 and SR 3.6.4.1.4 REQUIREMENTS (continued) The SGT System e x h a u s t s t h e secondary containment atmosphere t o t h e environment through a p p r o p r i a t e t r e a t m e n t equipment.

To e n s u r e t h a t a l l f i s s i o n p r o d u c t s a r e t r e a t e d , SR 3 . 6 . 4 . 1 . 3 v e r i f i e s t h a t t h e SGT System w i l l r a p i d l y e s t a b l i s h a n d maintain a p r e s s u r e i n t h e secondary containment t h a t i s l e s s t h a n t h e lowest p o s t u l a t e d p r e s s u r e e x t e r n a l t o t h e secondary containment boundary.

SR 3 . 6 . 4 . 1 . 4 demonstrates t h a t each O P E R A B L E SGT subsystem can m a i n t a i n a reduced p r e s s u r e i n t h e secondary containment s u f f i c i e n t t o a l l o w t h e secondary containment t o be i n thermal e q u i l i b r i u m a t s t e a d y s t a t e c o n d i t i o n s . The t e s t c r i t e r i o n s p e c i f i e d by S R 3 . 6 . 4 . 1 . 4 i n c l u d e s a n allowance f o r b u i l d i n g d e g r a d a t i o n between performances of t h e s u r v e i l l a n c e . This allowance r e p r e s e n t s a d d i t i o n a l b u i l d i n g i n l e a k a g e of 1 2 5 scfm.

As d i s c u s s e d i n B 3 . 6 . 4 . 2 , t h e SGT System has t h e c a p a c i t y t o maintain secondary containment n e g a t i v e p r e s s u r e assuming t h e f a i l u r e of a l l n o n q u a l i f i e d l i n e s 2 i n c h e s a n d s m a l l e r p l u s o t h e r analyzed f a i l u r e s . The number a n d s i z e of t h e s e assumed f a i l u r e s can vary a s p e n e t r a t i o n s a r e added or removed from t h e secondary containment boundary. To account f o r t h e absence of t h e s e assumed f a i l u r e s under t e s t c o n d i t i o n s t h e t e s t c r i t e r i o n s p e c i f i e d by SR 3 . 6 . 4 . 1 . 4 i s modified. These f a i l u r e s could i n c r e a s e secondary containment i n - l e a k a g e by approximately 400 scfm. T o account f o r t h i s a d d i t i o n a l i n - l e a k a g e , a n d i n a d d i t i o n t o t h e requirements o f SR 3 . 6 . 4 . 1 . 4 , each SGT subsystem must maintain 2 0.331 inches of vacuum water gauge i n t h e secondary containment f o r 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months a t a flow r a t e 5 4 0 0 0 cfm.

This value r e p r e s e n t s t h e minimum r e q u i r e d d i f f e r e n t i a l p r e s s u r e a t 5 4000 scfm system f l o w needed t o e n s u r e t h a t t h e i n t e g r i t y of t h e SGT System boundary w i l l meet i t s design requirement of 2 0.25 i n c h e s of vacuum water gauge i n response t o p o s t u l a t e d a c c i d e n t s .

The primary purpose of t h e s e SRs i s t o e n s u r e secondary containment boundary i n t e g r i t y . The secondary purpose of t h e s e SRs i s t o ensure t h a t t h e SGT subsystem, being used f o r t h e t e s t , f u n c t i o n s a s d e s i g n e d . There i s a s e p a r a t e L C O 3 . 6 . 4 . 3 with S u r v e i l l a n c e Requirements which s e r v e s t h e GRAND GULF B 3.6-87 LDC 06007

S e c o n d a r y Containment B 3.6.4.1 BASES SURVEILLANCE SR 3 . 6 . 4 . 1 . 3 a n d SR 3 . 6 . 4 . 1 . 4 (continued)

REQUIREMENTS p r i m a r y p u r p o s e o f e n s u r i n g OPERABILITY o f t h e SGT s y s t e m .

SRs 3 . 6 . 4 . 1 . 3 a n d 3 . 6 . 4 . 1 . 4 need n o t be p e r f o r m e d w i t h e a c h SGT s u b s y s t e m . The SGT s u b s y s t e m used f o r t h e s e Surveillances i s staggered t o ensure t h a t i n addition t o t h e r e q u i r e m e n t s o f L C O 3 . 6 . 4 . 3 , e i t h e r SGT s u b s y s t e m w i l l p e r f o r m t h i s t e s t . The i n o p e r a b i l i t y o f t h e SGT s y s t e m does not n e c e s s a r i l y c o n s t i t u t e a f a i l u r e of t h e s e S u r v e i l l a n c e s r e l a t i v e t o t h e secondary containment OPERABILITY. O p e r a t i n g e x p e r i e n c e has shown t h e s e c o n d a r y containment boundary u s u a l l y p a s s e s these S u r v e i l l a n c e s w h e n p e r f o r m e d a t t h e 18 month F r e q u e n c y . T h e r e f o r e , t h e Frequency was c o n c l u d e d t o be a c c e p t a b l e from a r e l i a b i l i t y standpoint.

REFERENCES 1. UFSAR, Secticln 1 5 . 6 . 5 .

2. UFSAR, S e c t i o n 1 5 . 7 . 4 .

G R A N D GULF B 3.6-87a L D C 06007

SCIVs B 3.6.4.2 APPLICABLE M a i n t a i n i n g SCIVs O P E R A B L E w i t h i s o l a t i o n t i m e s w i t h i n S A F E T Y ANALYSES l i m i t s e n s u r e s t h a t f i s s i o n p r o d u c t s w i l l remain t r a p p e d (continued) i n s i d e s e c o n d a r y c o n t a i n m e n t so t h a t t h e y can be t r e a t e d by t h e SGT System p r i o r t o d i s c h a r g e t o t h e e n v i r o n m e n t .

SCIVs s a t i s f y C r i t e r i o n 3 of t h e N R C P o l i c y S t a t e m e n t LCO SCIVs form a p a r t o f t h e s e c o n d a r y c o n t a i n m e n t b o u n d a r y . The SCIV s a f e t y f u n c t i o n i s r e l a t e d t o c o n t r o l o f o f f s i t e r a d i a t i o n r e l e a s e s r e s u l t i n g from DBAs.

The power o p e r a t e d a u t o m a t i c i s o l a t i o n dampers a n d v a l v e s a r e c o n s i d e r e d O P E R A B L E when t h e i r i s o l a t i o n t i m e s a r e w i t h i n l i m i t s . A d d i t i o n a l l y , power o p e r a t e d a u t o m a t i c dampers a n d v a l v e s a r e r e q u i r e d t o a c t u a t e on a n a u t o m a t i c i sol a t i on signal .

The n o r m a l l y c l o s e d i s o l a t i o n dampers a n d v a l v e s , r u p t u r e d i s k s , o r b l i n d f l a n g e s a r e c o n s i d e r e d O P E R A B L E when m a n u a l dampers a n d v a l v e s a r e c l o s e d o r open i n a c c o r d a n c e w i t h a p p r o p r i a t e a d m i n i s t r a t i v e c o n t r o l s , a u t o m a t i c dampers a n d valves a r e d e - a c t i v a t e d and secured i n t h e i r closed position, rupture d i s k s o r b l i n d flanges are in place. The SCIVs c o v e r e d by t h i s LCO, a l o n g w i t n t h e i r a s s o c i a t e d stroke times, i f applicable, are listed i n the applicable pl a n t procedures.

A P P L I C A B I L I T 'i In M O D E S 1 , 2 , a n d 3 , a D B A c o u l d l e a d t o a f i s s i o n p r o d u c t r e l e a s e t o t h e primary containment t h a t l e a k s t o t h e s e c o n d a r y c o K t a i n m e n t . T n e r e f o r e , O P E R A B I L I T Y o f SCIVs i s requi r e d .

I n MODES 4 a n d 5 , t h e p r o b a b i l i t y and consequences of t h e s e e v e n t s a r e r e d u c e d due t o p r e s s u r e a n d t e m p e r a t u r e l i m i t a t i o n s i n t h e s e MODES. T h e r e f o r e , m a i n t a i n i n g SCIVs O P E R A B L E i s n o t r e q u i r e d i n MODE 4 o r 5 , e x c e p t f o r 3 t h e r s i t u a t i o n s under which s i g n i f i c a n t r e l e a s e s o f r a d i o a c t i v e m a t e r i a l can be p o s t u l a t e d , such as d u r i n g o p e r a t i o n s w i t h a p o t e n t i a l f o r d r a i n i n g thr? r e a c t o r v e s s e l ( O P D R V s ) o r d u r i n g movement of r e c e n t l y i r r a d i a t e d f u e i a s s e m b l i e s ! i . e . , f u e l t h a t has o c c u p i e d p a r t of a c r i t i c a l r e a c t o r c o r e w i t h i n t h e p r e v i o u s 2 4 h o u r s ) . Moving r e c e n t l y i r r a d i a t e d f u e l assemblies i n t h e p r i m a r y o r s e c o n d a r y c o n t a i n m e n t n a y a l s o occur i n MODES 1 , 2 , a n d 3 .

G R A N D C1JLF B 3.6-96 LDC 06007

SCIVS B 3.6.4.2 BASES SU RV E I L L A N C E SR 3.6.4.2.1 (continued)

REQUIREMENTS r e l a t i v e l y e a s y , t h e 31 d a y Frequency was chosen t o p r o v i d e added a s s u r a n c e t h a t t h e S C I V s a r e i n t h e c o r r e c t p o s i t i o n s .

T w o Notes have been added t o t h i s SR.. The f i r s t Note a p p l i e s t o v a l v e s , dampers, r u p t u r e d i s k s , a n d b l i n d f l a n g e s l o c a t e d i p h i g h r a d i a t i o n a r e a s and a l l o w s them t o be v e r i f i e d by u s e of a d m i n i s t r a t i v e c o n t r o l s . Allowing v e r i f i c a t i o n by a d m i n i s t r a t i v e c o n t r o l s i s c o n s i d e r e d acceptable, since access t o these areas i s t y p i c a l l y r e s t r i c t e d d u r i n g M O D E S 1 , 2 , and 3 f o r A L A R A r e a s o n s .

T h e r e f o r e , t h e p r o b a b i l i t y of m i s a l i g n m e n t o f t h e s e SCIVs, once t h e y have been v e r i f i e d t o be i n t h e p r o p e r p o s i t i o n ,

i s low.

A second Note has been i n c l u d e d t o c l a r i f y t h a t SCIVs t h a t a r e open under a d m i n i s t r a t i v e c o n t r o l s a r e n o t r e q u i r e d t o meet t h e S R d u r i n g t h e t i m e t h e S C I V s a r e o p e n .

SR 3.0.4.2.2 V e r i f y i n g t h e i s o l a t i o n t i m e of e a c h power o p e r a t e d , I a u t o m a t i c SCIV i s w i t h i n l i m i t s i s r e q u i r e d t o d e m o n s t r a t e OPERABILITY. The i s o l a t i o n t i m e t e s t e n s u r e s t h a t t h e SCIV w i l l i s o l a t e i n a t i m e p e r i o d l e s s t h a n o r equal t o t h a t assumed i n t h e s a f e t y a n a l y s e s . G e n e r a l l y , SCIds must c l o s e w i t h i n 120 s e c o n d s t o s u p p o r t t h e f u n c t i o n i n g o f t h e Standby Gas T r e a t m e n t System. SCiVs may have a n a l y t i c a i c l o s u r e t i m e s based on a f g n c t i o n o t h e r t h a n s e c o n d a r y c o n t a i n m e n t i s o l a t i o n , i n wh5ch c a s e t h e more r e s t r i c t i v e t i m e a p p l i e s .

The Frequency o f t h i s SR i s i n a c c o r d a n c e w i t h t h e I n s e r v i c e T e s t i n g Program.

SR 3.6.4.2.3 V e r i f y i n g t h a t each a u t o m a t i c SCIV c l o s e s o n a s e c o n d a r y c o n t a i n m e n t i s o l a t i o n s i g n a l i s r e q u i ' r e d t o p r e v e n t 1 eakag?

o f r a d i c a c t i v e m a t e r i a l from s e c o n d a r y c o n t a i n m e n t f o l l o w i n g a DBA o r o t h e r a c c i d e n t s . T h i s S R e n s u r e s t h a t each a u t o m a t i c S C I V w i l l a c t u a t e t o t h e i s o i a t i o n p o s i t i o n on a s e c o n d a r y c o n t a i n m e n t i s o l a t i o n s i g n a l . The L O G I C SYSTEM F L i r Y C T I O N A L T E S T i n S R 3.3.6.2.6 o . i e r l a p s t h i s S R t o p r o v i d e complete t e s t i n g 3f t h e s a f e t y f ~ i r c t i ~ ~T ,h.~ j18 m o n t h

D rywe 1 1 I so 1 a t i on Va 1ve s 1 B 3.6.5.3 BASES SURVEILLANCE SR 3.6.5.3.3 REQUIREMENTS (continued) V e r i f y i n g t h a t t h e i s o l a t i o n t i m e of e a c h power o p e r a t e d ,

automatic drywell i s o l a t i o n valve i s w i t h i n l i m i t s i s r e q u i r e d t o d e m o n s t r a t e OPERABILITY. The i s o l a t i o n t i m e t e s t ensures t h e valve will i s o l a t e i n a time period l e s s t h a n o r e q u a l t o t h a t assumed i n t h e s a f e t y a n a l y s i s . The i s o l a t i o n t i m e a n d Frequency of t h i s S R a r e i n a c c o r d a n c e w i t h t h e I n s e r v i c e T e s t i n g Program.

SR 3.6.5.3.4 Verifying t h a t each automatic drywell i s o l a t i o n valve c l o s e s on a drywe71 i s o l a t i o n s i g n a l i s r e q u i r e d t o p r e v e n t b y p a s s l e a k a g e from t h e d r y w e l l f o l l o w i n g a D B A . T h i s SR e n s u r e s each automatic drywell i s o l a t i o n v a l v e w i l l a c t u a t e t o i t s i s o l a t i o n p o s i t i o n on a d r y w e l l i s o l a t i o n s i g n a l . The L O G I C SYSTEM F U N C T I O N A L T E S T i n SR 3 . 3 . 6 . 1 . 7 o v e r l a p s t h i s S R t o p r o v i d e c o m p l e t e t e s t i n g o f t h e s a f e t y f u n c t i o n . The 18 month Frequency i s b a s e d on the need t o p e r f o r m t h i s S u r v e i l l a n c e under t h e c o n d i t i o n s t h a t a p p l y d u r i n g a p l a n t o u t a g e a n d t h e p o t e n t i a i f o r a n unplanned t r a n s i e n t i f t h e s u r v e i l l a n c e were performed w i t h t h e r e a c t o r a t power, s i n c e i s o l a t i o n of p e n e t r a t i o n s would e l i m i n a t e c o o l i n g w a t e r f l o w a n d d i s r u p t t h e normal o p e r a t i o n o f many c r i t i c a l components. O p e r a t i n g e x p e r i e n c e has shown t h e s e components u s u a l l y p a s s t h i s S u r v e i l l a n c e when p e r f o r m e d a t t h e 18 month F r e q u e n c y . T h e r e f o r e , t h e Frequency was c o n c l u d e d t o b e a c c e p t a b l e from a r e l i a b i l i t y s t a n d p o i n t .

REFERENCES 1. LIFSAR, S e c t i o n 6.2.C.

2. GNRI-96/00162, I s s u a n c e o f Amendment N o . 126 t o F a c i l i t y O p e r a t i n g L i c e n s e No. N P F - 2 9 - Grand Gulf N u c l e a r S t a t i o n , U n i t 1 ( T A C No. M941751, d a t e d August 1 , 1 9 9 6 .

B 3.6-119

C K F A System B 3.7.3 BASES APPLICABLE The C R F A System i s assumed t o i s o l a t e t h e c o n t r o l room i n SAFETY ANALYSES r e s p o n s e t o m a n u a i i n i t i a t i o n f o l l o w i n g a l o s s of c o o l a n t (continued) a c c i d e n t , m a i n steam l i n e b r e a k , o r c o n t r o l rod d r o p a c c i d e n t . A n a l y s e s of t h e s e e v e n t s have assuDed t h e c o n t r o l room would be i s o l a t e d f o r a t l e a s t t h r e e d a y s . A t t h a t t i m e , i s o l a t i o n was t e r m i n a t e d a n d t h e c o n t r o l room was again ventilated w i t h f i l t e r e d ( i . e . , HEPA) outside a i r .

S a f e t y a n a l y s i s o f t h e f u e l h a n d ) i n g a c c i d e n t has d e m o n s t r a t e d t h a t c o n t r o l room i s o l a t i o n i s n o t r e q u i r e d f o r t h i s a c c i d e n t . The r a d i o l o g i c a l d o s e s t o c o n t r o l room p e r s o n n e l a s a r e s u l t of t h e v a r i o u s DBAs a r e summarized i n R e f e r e n c e 4 . No s i n g l e a c t i v e o r p a s s i v e f a i l u r e w i l l c a u s e t h e l o s s of o u t s i d e o r r e c i r c u l a t e d a i r from t h e c o n t r o l room.

The C R F A System s a t i s f i e s C r i t e r i o n 3 o f t h e NRC P o l i c y Statement.

LCO Two reduridant s u b s y s t e m s o f t h e C R F A System a r e reqirired t o be O P E R A B L E t o e n s u r e t h a t a t l e a s t one i s a v a i l a b l e ,

assuming a s i n g l e f a i l u r e d i s a b l e s t h e o t h e r subsysteiii.

T o t a l s y s t e m f a i l u r e c o u l d r e s u l t i n a f a i l u r e t o meet t h e d o s e r s a u i r e m e n t s o f GDC 1 9 i n t h e e v e n t of a D B A .

The C R F A System i s c o n s i d e r e d O P E R A B L E when t h e i n d i v i d u a l components n e c e s s a r y t o c o n t r o l o p e r a t o r e x p o s u r e a r e OPERABLE i n both subsystems. A subsystem i s considered O P E R A B L E when i t s a s s o c i a t t i d :

a. Fan i s OPERABLE;

0. HEPA f i l t e r i s n o t excessively r e s t r i c t i n g f i g & and i s capable of performing i t s f i l t r a t i o n f u n c t i o n s ; a n d

c. G e m i s t e r , d u c t w o r k , v a l v e s , arid dampers a r e O P E R A B L E , I a n d a i r c i r c u l a t i o n can be m a i n t a i n e d .

I n a d d i t i o n , t h e c o n t r o l r o o m boundary must be m a i n t a i n e d ,

j n c l u d i n g t h e i n t e g r i t y of t h e w a l l s ! f l o o r s , c e i l i n g s ,

d u c t w o r k , a n d a c c e s s d o c r s . T h e c o n t r o l room boundary i s m a i n t a i n e d when t h e boandary can be r a p i d l y i s o l a t e d a n d e s t a b l i s h e d t o ineet i n - l e a k a g e l i m i t s as o u t l i n e d i n R e f . 6 .

( c o n t i nued j 5 3.7-12 l a c 050.50

CRFA System s 3.7.3 BASES ACT IONS E.:

i c o n t i nued 1 D u r i n g O P D R V s , w i t h t i v o CRFA s u b s y s t e m s i n o p e r a b l e , a c t i o n mu,st b e t a k e n i m m e d a t e l y t o s u s p e n d a c t i v i t i e s t h a t p r e s e n t a potential f o r releasing r a d i o a c t i v i t y t h a t might require i s o l a t i o n o f t h e c o n t r o l room. T h i s p l a c e s t h e u n i t i n a condition t h a t minimizes r i s k .

If a p p l i c a b l e , a c t i o n s m u s t b e i n i t i a t e d i r m e d i a t e l y t o suspend OPDRVs t o m i n i m i z e t h e p r o b a b i l i t y o f a v e s s e l d r a i n d o w n a n d s u b s e q u e n t p o t 2 n t i a l for f i s s j o n p r o d u c t r e l e a s e . A c t i o n s m u s t c o n t i n u e u n t i l t h e OPDRVs a r e suspended.

SURVEILLANCE SR 3.7.3.1 REQUIREMENTS T h i s S R v e r i f i e s t h a t a s u b s y s t e m i n a s t a n d b y mode s t a r t s f r o m t h e c o n t r o l r o o m on demand a n d c o n t i n u e s t o o p e r a t e .

S t a n d b y systems s h o u l d b e c h e c k e d p p r i o d i c a l l y t o e n s u r e t h a t t h e y s t a r t a n d f u n c t i o n p r o p e r l y . As t h e e n v i r o n m e n t a l and n o r m a l o p e r a t i n g c o n d i t i o n s o f t h i s s y s t e m a r e n o t s e v e r e , t e s t i n g e a c h s u b s y s t e m o n c e e v e r y m o n t h p r o v i d e s an a d e q u a t e check on t h i s s y s t e m . F U r t h f r m D f E , t h e 31 d a y I F r e q u e n c y i s b a s e d c n t h e known r e l i a b i l i t y o f t h e e q u i p m e n t and t h e t w o s u b s y s t e m r e d t i n d a n c y a v a i l a b l e .

s:! 3.7.3.2 T h i s S R v e r i f i e s t h a t t h e r e q u i r e d CP.Fk t e s t i n g i s p e r f o r m e d i n a c c o r d a n c e w i t h t h e V e n t i 1 a t i o n F i 1 t e r i e s t i ncj P r o g r a m (VFTF). The JFTP i n c l u d e s t e s t i n g HEPk f i 1 t e r p e r f o r m a n c e ,

and m i n i m u m s s t e r n flow r a t e . S p e c i f i c t e s t f r e q u e n c i e s and a d d i t i o n a l i n f o r m a t i o n a r e d i s c u s s e d i n d e t a i l i n t h e VFTP.

AC Sources-Ooerating B 3.8.1 BASES SERVE1LLANCE SR 3.8.1.9 (continued)

REQUIREMENTS

2) t r i p p i n g i t s a s s o c i a t e d s i n g l e l a r g e s t l o a d with t h e DG s c l e l y supplying t h e bus.

I f t h i s l o a d w e r e t o t r i p , i t would r e s u l t i n t h e l o s s o f t h e D G . As r e q u i r e d by IEEE-338 ( R e f . 131, The l o a d r e j e c t i o n t e s t i s a c c e p t a b l e i f r;he i n c r e a s e i n a i e s e l s p e e d d o e s n o t e x c e e d 7 5 % of t h e d i f f e r e n c e between s y c c h r o n o u s s p e e d a n d t h e o v e r s p e e d t r i p s e t p o i n t , o r 15%

above s y n c h r o n o u s s p e e d , w h i c h e v e r i s l o w e r . For t h e Grand Gulf N u c l e a r S t a t i o n t h e l o w e r v a l u e r e s u l t s from t h e f i r s t criteria.

The 18 month F r e q u e n c y i s c o n s i s t e n t \with t h e recommendati o n o f Regul a t o r y Guide 1 . 9 ( R e f . 3 ) .

T e s t i n g performed f o r t h i s SR i s normally conducted with t h e DG b e i n g t e s t e d ( a n d t h e a s s o c i a t e d s a f e t y - r e l a t e d d i s t r i b u t i o n subsystem) connected t o one o f f s i t e s o u r c e ,

d h i l e t h e remaining s a f e t y - r e l a t e d systems a r e a l i g n e d t o a n o t h e r o f f s i t e s o u r c e . T h i s m i n i m i z e s t h e p o s s i b i l i t y of common c a u s e f a i l u r e s r e s u l t i n g froiri o f f s i t e / g r i d v o l t a g e perturbations.

T h i s S R has been m o d i f i z d by two N o t e s . Note 1 s t a t e s ;

C r e a i t may be t a k e n f o r unplanr,ed e v e n t s t h a t s a t i s f y t h i s SR. Exarnpies o f u n p l a n n e d e v e n t s may i n c l u d e :

11 UnexpectFd o p e r a t i o n a ? e v e c t s which cailse t h e equipment t o perform t h e f i ; m 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 ilihich adequate documentation o f t h e r e y u i r e d p e r f o r m a n c e i s a v a i 1 a b ? n ; and 21 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 , p r o v i d e d t h e ma; n t e n a n r e was r e c u i r e d ,

o r perfcrmed i n conjunction w ' t h maintenance required t o m a i n t a i n OPERA3ILITY c r r e l i a b i l i t y .

Note 2 er-lsLires t h a t t h e 3G ' s t e s t e d under l e a d c c n d i t < c , n s t h a t a r e as close t o design basis conditions as possible.

Mhen s y n c h r o n i z e d w i t h o f f s i t e power, t e s t i n g s h o u l d be p e r f o r m e d a t a pr;wer f a c t o r o f 5 0 . 9 f o r DG 11 a n d DG 13 a n d s 0.89 f o r DG 1 2 . These power f a c t o r s a r e r e p r e s e n t a t i v e o f t h e a c t u a l i n d u c t i v e : o a d i r ; g t h e DGs would s e e u n d e r d e s i g n

A C Sources - 0 p e r a t - r , g B 3.8.1 BASES SURVEILLANCE SR 3.8.1.9 (ccntinued)

REQUIREMENTS b a s i s a c c i d e n t c o n d i t i o n s . Under c e r t a i n c o n d i t i o n s ,

however, Note 2 a l l o w s t h e s u r v e i l l a n c e t o be conducted a t a power f a c t o r above t h e l i m i t . These c o n d i t i o n s occur when g r i d v o l t a g e i s h i g h , a n d t h e a d d i t i o n a l f i e l d e x c i t a t i o n needed t o g e t t h e power f a c t o r t o w i t h i n t h e l i m i t s r e s u l t s i n v o l t a g e s on t h e emergency busses t h a t a r e t o o h i g h . Under t h e s e c o n d i t i o n s , t h e p o w e r ' f a c t o r should be m a i n t a i n e d as c l o s e as p r a c t i c a b l e t o t h e l i m i t w h i l e s t i l l m a i n t a i n i n g a c c e p t a b l e v o l t a g e l i m i t s an t h e emergency b u s s e s . I n o t h e r c i r c u m s t a n c e s , t h e g r i d v o l t a g e may be such t h a t t h e D G e x c i t a t i o n l e v e l s needed t o o b t a i n t h e s p e c i f i e d power f a c t o r may n o t cause u n a c c e p t a b l e v o l t a g e s on t h e emergency b u s s e s , b u t t h e e x c i t a t i o n l e v e l s a r e i n e x c e s s o f t h o s e recommended f o r t h e D G . I n such c a s e s , t h e power f a c t o r s h a l l be maintained as c l o s e a s p r a c t i c a b l e t o t h e l i m i t w i t h o u t exceeding t h e DG excitation limits.

SR 3.8.1.10 This S u r v e i l l a n c e demonstrates t h e D G c a p a b i l i t y t o r e j e c t a f u l l l o a d , i . e . , m a x i m u m expected a c c i d e n t l o a d , w i t h o u t overspeed t r i p p i n g or exceeding t h e predetermined v o l t a g e l i m i t s . The D G f u l l l o a d r e j e c t i o n may occur because o f a system fau1 t or' i n a d v e r t e n t b r e a k e r t r i p p i n g . This S u r v e i l i a n c e e n s u r e s proper engine g z n e r a t o r l o a d r e s p o r s e under t h e s i m u l a t e d t e s t c o n d i t i o n s . This t e s t s i m u l a t e s t h e l o s s of t h e t o t ? : cov,nected l o a d t h a t t h e DG experiences followins a f u l l l o a d rejecticn a n d v e r i f i e s t h a t t h e D G does riot t r i p u p o n l o s s o f t h e l o a d . These a c c e p t a n c e c r i t e r i a provide D G dainage p r o t e c t i o n . While t h e D G i s n o t expected t o e x p e r i e n c e t h i s t r a n s i e n t d u r i n g a n e v e n t a n d c o n t i n u e t o be a v a i l a b l e , t h i s response enstires t h a t t h e DG i s n o t degraded f o r f u t u r e a p p l i c a t i o n ,

i n c l u d i n g r e c o n n e c t i o n t o t h e bus i f t h e t r i p i n i t i a t o r can be c o r r e c t e d o r i s o l a t e d .

I n o r d e r t o e n s u r e t h a t t h e D G i s t e s t e d under l o a d c o n d i t i o n s t h a t a r e as c l o s e t o d e s i g n b a s i s c o n d i t i o n s as p o s s i b l e , t e s t i n g must be performed using a power f a c t o r 5 0.9. This power f a c t o r i s chosen t o be r e p r e s e n t a t i v e of t h e a c t u a l d e s i g n b a s i s i n d u c t i v e l o a d i n g t h a t t h e DG w o u l d experience.

(ccntiuueai

4C S o u r c e s - O p e r a t i n g a 3.5.1 BASES SURVEILL4NCE SR 3.8.1.10 (continued)

REQUIREMENTS The 18 month Frequency i s c o n s i s t e n t w i t h t h e recommendation o f R e g t i l a t o r y Guide 1 . 9 ( R e f . 3 ) a n d i s i n t e n d e d t o be c o n s i s t e n t w i t h 2 x p e c t e d f u e l c y c l e l e n g t h s .

T e s t i n g performed f o r t h i s S R i s normally conducted with t h e DG being t e s t e d ( a n d t h e a s s o c i a t e d s a f e t y - r e l a t e d d i s t r i b u t i o n s u b s y s t e m ) c o n n e c t e d t o one o f f s i t e s o u r c e ,

while t h e remaining s a f e t y - r e l a t e d systems a r e a l i g n e d t o a n o t h e r o f f s i t e s o u r c e . This minimizes t h e p o s s i b i l i t y of common c a u s e f a i l u r e s r e s u l t i n g from o f f s i t e / g r i d v o l t a g e perturbations.

T h i s SR h a s been m o d i f i e d by a two N o t e s . Note 1 s t a t e s t h a t c r e d i t may be t a k e n 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 of unplanned e v e n t s may i n c l u d e :

1) Unexpected o p e r a t i o n a l e v e n t s which c a u s e t h e e q u i p m e n t t o p e r f o r m 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 a d e q u a t e d o c u m e n t a t i o n o f t h e required performance i s a v a i l a b l e ; a n d

2) P o s t m a i n t e n a n c e t e s t i n g t h a t reqLiires p e r f o r m a n c e 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 , p r o v i d e d t h e m a i n t e n a n c e 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 r e q u i r e d t o maintain OPERABILITY o r r e l i a b i l i t y .

N o t e 2 e n s u r e s t h a t t h e DS i s t e s t e d u n d e r l o a d c o n d i t i o n s t h a t a r e as c l o s e t o d e s i g r i b a s i s c o n d i t i o n s a s p o s s i b l e .

When s y n c h r o n i z e d w i t h o f f s i t e power, t e s t i n g s h o u l d be p e r f c r n e d a t a power f a c t c r o f 5 0 . 9 f o r C G 11 a n d D G 13 a n d 5 0 . 8 9 f o r D G 1 2 . These power f a c t o r s a r e r e p r e s e n t a t i v e of t h e a c t u a l i n d u c t i v e l o a d i n g t h e DGs would s e e under d e s i g n b a s i s a c c i d e n t c o n d i t i o n s . Under c e r t a i n c o n d i t i o n s ,

however, Note 2 a l l o w s t h e s u r v e i l l a n c e t o be c o n d u c t e d a t a poiwer f a c t o r above t h e l i m i t . These c o n d i t i o n s o c c u r when g r i d v o l t a g e i s h i g h , a n d t h e a d d i t i o n a l f i e l d e x c i t a t i o n needed t o g e t t h e power f a c t o r t o w i t h i n t h e l i m i t s r e s u l t s i n v o l t a g e s zrr t h e e n e r g e n c y b u s s e s t h a t a r e t o g high. Under t h e s e c a n d i t i c n s , t h e power f a c t o r s h 3 u l d be m a i n t a i n e d a s c l o s e a s p r a c t i c a b l e t o t h e l i m i t w h i l e s t i l l m a i n t a i n i n g a c c e p t a b l e v o l t a g e l i m i t s on t h e emergency b u s s e s . I n o t h e r c i r c L m s t a n c e s , t h e g r i d v o l t a g e (coqtinued)

hC SoJrces - Operati n s a 3.8.:

BASES SURVEILLANCE SR 3.8.1.10 (continued)

REQUIREMENTS may b e s u c h t h a t t h e D G e x c i t a t i o n l e v e l s n e e d e d t o o b t a i n t h e s p e c i f i e d p o w e r f a c t o r may n o t c a u s e u n a c c e p t a b l e v o l t a g e s on t h e emergency busses, b u t t h e e x c i t a t i o n l e v e l s a r e i n e x c e s s o f t h o s e r e c c m m e n d e d f o r t h e DG. I n s u c h c a s e s , t h e power f a c t o r s h a l l be m a i n t a i n e d as c l o s e a s p r a c t i c a b l e t o t h e l i m i t w i t h o u t e x c e e a i n g t h e DG excitarLion l i m i t s .

SR 3.8.1.11 As r e q u i r e d b y R e g u l a t o r y G u i d e 1 . 9 ( R e f . 3 1 , t h i s S u r v e i l l a n c e d e m o n s t r a t e s t h e as d e s i g n e d o p e r a t i o n o f t h e s t a n d b y power sources d u r i n g loss o f t h e o f f s i t e s o u r c e .

T h i s t e s t v e r i f i e s a l l a c t i o n s e n c o u n t e r e d from t h e l o s s o f o f f s i t e power, i n c l u d i n g s h e d d i n g o f t h e D i v i s i o n 1 and 2 n o n e s s e n t i a l l o a d s and e n e r g i z a t i o n o f t h e emergency buses and r e s p e c t i v e l o a d s f r o m t h e DG. It f u r t h e r d e m o n s t r a t e s t h e c a p a b i l i t y o f t h e DG t o a u t o m t i c a l l y a c h i e v e t h e r e q u i r e d v o l t a g e and f r e q u e n c y w i t h i n t h e s p e c i f i e d t i m e .

T h e DG a u t o - s t a r t t i x e o f 10 s e c o n d s i s d e r i v e d f r o m requirements o f t h e accident a n a l y s i s t o respond t o a d e s i g n b a s i s l a r g e b r e a k LOCA. T h e S u r v e i l l a n c e s h o u l d b e c o n t i n u e d f o r a minimum o f 5 m i n u t e s i n o r d e r t o d e m o q s t r a t e t h a t a l l s t a r t i v g t r a n s i e n t s have decayed and s t a b i l i t y has b e e n a c h i e v e d .

T h e r e q u i r e m e n t t o v e r i f y t h e c o n n e c t i o n a n d po'fler s u p p l y o f permanent and a u t o - c o n n e c t e d l o a d s i s i n t e n d e d t o s a t i s f a c t o r i l y show t h e r e l a t i o n s h i p o f t h e s e ; o a d s t o t h e DG l o a d i n g l o g i c . I n c e r t a i n c i r c b m s t a n c e s , mz;riy o f t h e s e l o a d s c a n n o t a c t u a l l y b e c o n n e c t e d o r l o a a e d w i t h o u t undue hardship or potential f o r undesired operation. For i n s t a n c e , E C C S i n j e c t i o n v a l v e s a r e n o t d e s i r e d t o be s t r o k e d open, systems a r e n o t c a p a b l e o f b e i n g c p e r a t e d a t f u l l f l o w , o r RHR s y s t e m s p e r f o r m i n g a d e c a y h e a t r e m o v a l f u n c t i o n a r e n o t d e s i r e d t o b e r e a l i g n e d t o t h e E C C S mode of o p e r a t i o n . I n l i e u o f a c t u a l d e m o n s t r a t i o n o f t h e c o n n e c t i o n and l o a d i n g o f t h e s e l o a d s , t e s t i n g t h a t a d e q u a t e l y shol.is t h e c a p a b i l i t y o f t h e D G s y s t e m t o p e r f o r n t h e s e f u n c t i o n s i s a c c e p t a b l e . T h i s t e s t i n g may i n c l u d e any s e r i e s o f s e a u e n t i a l , o v e r l a p p i n g , o r t o t a l s t e p s s o t h a t t h e e n t i r e c o n n e c t i o n and l o a d i n g sequence i s

' y F r i f ie d .

AC Sources-Operating E 3.8.1 SU R\i E I L LA N C E SR 3.8.1.12 (continued:

REQUIREMENTS t h a r . could c h a l l e n g e continued steady s t a t e o p e r a t i o n and, a s a r e s u l t , p l a n t s a f e t y s y s t e m s . C r e d i t may be t a k e n f o r unplanned e v e n t s t n a t s a t i s f y t h i s S R . Examples o f Lin31 anned e v e n t s may i ncl ude:

1) Unexpected o p e r a t i o n a l e v e n t s which c a u s e t h e equipment t o p e r f o r m 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 a d e q u a t e d o c u m e n t a t i o n o f t h e requi red performance i s avai 1 a b l e ; a n d

2) P o s t m a i n t e n a n c e t e s t i n g t h a t r e q u i r e s p e r f o r m a n c e of 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 , p r o v i d e d t h e m a i n t e n a n c e 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 r e q u i r e d t o maintain OPERABILITY or r e l i a b i l i t y .

SR 3.8.1.13 T h i s S u r v e i l l a n c e d e m o n s t r a t e s t h a t DG n o n - c r i t i c a l protective functions:

Generator 1 oss o f e x c i t a t i o n ,

G e n e r a t o r r e v e r s e power, High j a c k e t w a t e r 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 vol, t a g e r e s t r a i n t ,

Bus u n d e r f r e q u e n c y ( D G 11 arld DG 1 2 o n l y ) ,

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

L O W t t i r b o c h a r g e r o i l p r e s s u r e (DG 11 a n d D G 1 2 only),

High v i b r a t i o n ( D G 11 a n d DG 1 2 o n l y ) ,

H i g h l u b e o i l t e m p e r a t u r e (DG 11 a n d D G 1 2 o n l y ) ,

Low l u b e o i l p r e s s u r e !DG 13 o n l y ) ,

High c r a n k c a s e p r e s s u r e , a n d G e n e r a t o r ground o v e r c u r r e n t ( D G 11 a n d D G 1 2 o n l y )

a r e bypassed on a n E C C S i n i t i a t i o n t e s t s g n a l . The non-c r i t i c a l t r i p s a r e blypassed d u r i n g 0 B . 4 ~a n d p r o v i d e a l a r m s o n a n abnormal e n g i n e c o n d i t i o n s . T h e s e a l a r m s p r o v i d e t h e operator with necessary information t o r e a c t a p p r o p r i a t e l y .

The OG 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 protecting the engire agairlst

AC Sources-Operating 6 3.8.1 SU R l i E I i LA N C E SR 3.8.1.14 (continued)

REQU I REMENTS 5 0.9. T h i s power f a c t o r i s chosen t o be r e p r e s e n t a t i v e of t h e a c t u a l d e s i g n b a s i s i n d u c t i v e l o a d i n g t h a t t h e !IG c o u l d e x p e r i e n c e . During t h e t e s t t h e g e n e r a t o r v o l t a g e a n d f r e q u e v c y i s 4169 F 4 1 6 v o l t s a n d 2 58.8 Hz a n d I 5 3 Hz w i t h i n 10 s e c o n d s a f t e r t h e s t a r t s i g n a l a n d t h e s t e a d y s t a t e generator voltage a n d freauency i s maintained w i t h i n 4160 C 416 v i s i t s a n d 60 I 1 . 2 H z f o r t h e d u r a t i o n of t h e test.

T h e 18 month Frequency i s c o n s i s t e n t w i t h t h e recommendations o f R e g u l a t o r y Guide 1 . 9 ( R e f . 3 ) t a k e s i n t o c o n s i d e r a t i o n p l a n t c o n d i t i o n s r e q u i r e d t o perform t h e S u r v e i l l a n c e ; a n d i s i n t e n d e d t o be c o n s i s t e n t w i t h expected fuel c y c l e 1 engths.

T h i s S u r v e i l l a n c e i s m o d i f i e d by t h r e e N o t e s . Note 1 I s t a t e s t h a t momentary t r a n s i e n t s d u e t o c h a n g i n g bus l o a d s do n o t i n v a l i d a t e t h i s t e s t . The DG 11 a n d i2 l o a d b a n d i s p r o v i d e d t o a v o i d r o u t i n e o v e r l o a d i n g o f t h e TDI D G .

R o u t i n e o v e r l o a d i n g may r e s u l t i n more f r e q u e n t teardown i n s p e c t i o n s i n a c c o r d a n c e w i t h vendor recommendatiops i n Grder t o m a i n t a i n D G O P E R A E I L I T Y . S i m i l a r l y , momentary poip;er f a c t o r t r a n s i e n t s above t h e l i m i t d o n o t i n v a l i d a t e t h e t e s t . Note 2 s t i p u l a t e s t h a t c r s d i t nay be Laken 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 S R . Examples o f unplanned e v e n t s may i n c l u d e :

1) Unexpected o p e r a t i o n a l e v e n t s which caiise 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 n i s S u r v e i l l a n c e , f o r which a d e q u a t e d o c u n e n t a t i o n of t h e r e q u i red performance i s a v a i i a b l e ; a n d 21 P o s t m a i n t e n a n c e 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 , p r o v i d e d t h e m a i n t e n a n c e 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 m a i n t e n a n c e r e q u i r e d t o m a i n t a i n OPERABILITY o r r e l i a b i l i t y .

Note 3 e n s u r e s t n a t t h e G G i s t e s t e d under lead c o n d i t j o n s t h a t a r e a s c l o s e t o d e s i g n b a s i s c o n d i t i o n s as p o s s i b l e .

When s y n c h r o n i z e d w i t h o f f s i t e power, t e s t i n g s h o u l d be performed a t a power f a c t o r of 5 0 . 9 f o r DG 11 ar!d D G 13 a n d 5 0.89 f o r D G 12. These power f a c t o r s a r e r e p r e s e n t a t i v e c f i c o n t i nued;

AC S o u r c e s - O p e r a t i n g

[! 3 . 8 . 1 BASES SURVEILLANCE SR 3.8.1.14 ( c o n t i n u e d )

R E Q U i REMENTS t h e a c t u a l i n d u c t i v e l o a d i n g t h e DGs w o u l d s e e u n d e r d e s i g r b a s i s a c c i d e n t c o n d i t i o n s . Under c e r t a i n c o n d i t i o n s ,

however, Note 3 a l l o w s t h e s u r v e i l l a n c e t o be conducted a t a power f a c t o r above t h e l i m i t . These c o n d i t i o n s o c c u r when g r i d v o l t a g e i s h i g h , a n d t h e a d d i t i o n a l f i e l d e x c i t a t i o n needed t o g e t t h e power f a c t o r t o w i t h i n t h e l i m i t s r e s u l t s i n v o l t a g e s on t h e emergency busses t h a t a r e t o o h i g h . Under t h e s e c o n d i t i o n s , t h e power f a c t o r s b o u l d b e m a i n t a i n e d a s c l o s e as p r a c t i c a b l e t o t h e l i m i t w h i l e s t i l l m a i n t a i n i n g a c c e p t a b l e v o l t a g e l i m i t s on t h e emergency busses. I n other circumstances, t h e g r i d voltage may b e s u c h t h a t t h e DG e x c i t a t i o n l e v e l s n e e d e d t o o b t a i n t h e s p e c i f i e d p o w e r f a c t o r may n o t c a u s e u n a c c e p t a b l e v o l t a g e s o n t h e emergerlcy b u s s e s , b u t t h e e x c i t a t i o n l e v e l s a r e i n e x c e s s o f t h o s e recommended f o r t h e D G . I n such c a s e s , t h e power f a c t o r s h a l l be m a i n t a i n e d as c l o s e a s p r a c t i c a b l e t o t h e l i m i t w i t h o u t e x c e e d i n g t h e DG e x c i t a t i o n 1i m i t s .

When t h i s S u r v e i l l a n c e i s c o n d u c t e d d u r i n g Mode 1 o r 2 , t h e following special administrative controls are placed i n e f f e c t ( R e f . 16):

1) O n l y o n e DG may b e t e s t e d i n p a r a l l e l t o t h e o f f s i t e g r i d a t a time,

2) No a d d i t i a r i a l m a i n t e n a n c e o r t e s t i n g inay b e p e r f c r q e d o r p i a n n e d t o b e p e r f G r m e d on r e q u i r e d s a f s t y s y s t e m s , s u b s y s t e m s , t r a i n s o r components and d e v i c e s t h a t d e p e n d oi t h e r e r r a i n i n g DGs 6 s -sour;es a?

emergency power, and

3) P r e c a u t i o n s s h o u l d be t a k e n t o a v o i d c o n d u c t i n g t h e t e s t d u r i n g periods o f severe weather, unstable o f f s i t e g r i d c o n d i t i o n s , o r m a i n t e n a n c e and o t h e r t e s t C o n d i t i o n s t h a t h a v e an a d v e r s e e f f e c t on t h s test.

T h i s S u r v e i l l a n c e d e m o n s t r a t e s t h a t t h e d i e s e l e n g i n e can r e s t a r t f r o n a h o t c o n c i t i c n , s s c h as s u b s e q u e n t t o shutdown f r o m n o r m a l S u r v e i l l a n c e s , ar,d a c h i e v e t h e y p q z i r e d t.jo1 t a g e

AC Sources-ShutdoNn B 3.8.2 EASES LCO support, assumirg a loss o f the o f f s i t e c i r c u i t . S i m i l a r l y ,

(continued) when t h e h i g h p r e s s u r e c o r e s p r a y C H P C S ) i s r e q u i r e d t o be OPERABLE, a s e p a r a t e o f f s i t e c i r c u i t t o t h e D i v i s i o n 3 C 1 ass 1 E o n s i t e e l e c t r i c a l power d i s t r i b u t i o n s u b s y s t e m , o r an OPERABLE D i v i s i o n 3 D G , e n s u r e an a d d i t i o n a l s o u r c e o f power f o r t h e H P C S . T h i s a d d i t i o n a l s o u r c e f o r D i v i s i o n 3 i s n o t n e c e s s a r i l y r e q u i r e d t o be c o n n e c t e d t o b e OPERABLE.

E i t h e r t h e c i r c u i t r e q u i r e d by LCO I t e m a , o r a c i r c u i t r e q u i r e d t o meet LCO I t e m c may be c o n n e c t e d , w i t h t h e second s o u r c e a v a i l a b l e f o r c o n n e c t i o n . Together, O P E R A B I L I T f o f t h e r e q u i r e d o f f s i t e c i r c u i t ( s 1 and DG(s1 e n s u r e s t h e a v a i l a b i l i t y of s u f f i c i e n t A C s o u r c e s t o o p e r a t e t h e p l a n t i n a s a f e manner and t o m i t i g a t e t h e consequences o f p o s t u l a t e d e v e n t s d u r i n g shutdown ( e . g . , f u e l h a n d l i n g accidents i n v o l v i n g recently i r r a d i a t e d f u e l , reactor vessel d r a i n d o w n ? . Automatic i n i t i a t i o n o f t h e r e q u i r e d DG d u r i n g shutdown c o n d i t i o n s i s s p e c i f i e d i n L C O 3 . 3 . 5 . 1 , E C C S I n s t r u m e n t a t i o n , and L C O 3 . 3 . 8 . 1 , LOP I n s t r u m e n t a t i o n .

The q u a l i f i e d o f f s i t e c i r c u i t ( s ) m u s t be c a p a b l e o f inai K t a i n i n g r a t e d f r e q u e v c y and vo1 t a g e w h i 1 e c o n n e c t e d t o t h e i r r e s p e c t i v e E S F b u s ( e s ) , and a c c e p t i n g r e q u i r e d l o a d s d u r i n g an a c c i d e n t . Q u a l i f i e d o f f s i t e C i r c u i T s a r e t h o s e t b a t a r e d e s c r i b e d i n t h e U F S A R and a r e p a r t o f t h e j i c e n s i n g b a s i s f o r t h e p l a n t . The o f f s i t e c i r c u i t c o n s i s t s o f i n c o m i n g b r e a k e r s and d i s c o n n e c t s t o t h e E S F t r a q s f o r r n e r s and t n e r e s p e c t i v e c i r c u i t p a t h i n c l u d i n g f e e d e r b r e a k e r s t o a l l 4 . 1 6 kV E S F buses r e q u i r e d by L C O 3 . 8 . 8 .

T h e r e c j t i i r e d DG must be c a p a b l e o f s t a r t i n g , a c c e l e r a t i n g to r a t e d speed and v o l t a g e , and c o n n e c t i n g t o i t s r e s p e c t i v e E S F b u s on d e t e c t i o n o f bus u n d e r v o l t a g e , and a c c e p t i n g r e q u i r e d l o a d s . T h i s sequence must b e a c c o m p l i s h e d w i t h i n 10 s e c o n d s . Each DG m u s t a l s o b e c a p a b l e o f a c c e p t i n g r e q u i r e d l o a d s w i t h i n t h e assumed l o a d i n g sequence i n t e r v a l s , and must c o n t i n u e t o c p e r a t e u n t i l o f f s i t e p o d e r can be r e s t o r e d t o t h e E S F b u s e s . These c a p a b i l i t i e s a r e r e q u i r e d t o be met f r o m a v a r i e t j a: i n i t i a l c o n d i t i o n s s u c h as: DG i n s t a n d b y K i t h t h e e n g i r e h o t and D G i n s t a n d b y w i t h t h e e n g i n e a t a m b i e n t c o n d i t i o n s . A d d i t i a n a l DG c a p a b i 1 it i es m u s t be d e m o n s t r a t e d t c m e e t r e q u i red S u r v e i l l a n c e s , e . g . , c a p a b i l i t y o f t h e DG t o r e v e r t t o s t a n d b y s t a t u s on an E C C S s i g n a l w h i l e o p e r a t i n g i n p a r a i l e l t e s t mode.

A C Sources - Shuzdown B 3.8.2 BASES LCO Proper sequencing o f 1 o a d s , incl udi n g t r i opng o f I (ccntinued) nonessential l o a d s , i s a required function f o r DG OPERABILITY. I n a d d i t i o n , proper l o a d sequence o p e r a t i o n i s

A C S c u r c e s - Shutdown 3 3.2.2 BASES SURLE! LL>A.NCE SR 3.8.2.1 (continued) 2EQU I R E M E N T S w i t h t h e D G i s ) t h a t i s n c t r e q u i r e d t o b e O P E W E L E . Refer t o t h e corresp2nding Bases f o r LCO 3 . 8 . 1 f o r a d i s c u s s i o n o f each SR.

This SR i s n o d i f i e d by t d o Notes. The reason f o r t h e Note 1 i s t o p r e c l u d e r e q u i r i n g t h e O P E R A B L E D G ( s ) from being p a r a i l e i e d iniitii t h e o f f s i t e p o w e r network c r c t h s r w i s e reridered inoperable c u r i n g t h e performance o f S R s , a n d t o preciude d e - e n e r g i z i n g a r e q u i r e d 4100 V ESF b u s o r d i s c o n n e c t i n g a req-iired o f f s i t e c i r c u i t d u r i n g performance of S R s . M i t h l i m i t e d AC s e u r c e s a v a i l a b l e , a s i n g l e event c o u l d compromise both t h e r e q u i r e d c i r c u i t a n d t h e DG. It i s t h e i n t e n t t h a t t h e s e SRs must s t i l l be c a p a b l e o f being met, b u t a c t u a l performance i s n c t r e q u i r e d d u r i n g p e r i o d s when t h e DG a n d o f f s i t e c i r c u i t i s r e a u i r e d t o be O P E R A B L E .

N o t e 2 s t a t e s t h a t S R s 3 . 8 . 1 . 1 2 a n d 3 . 8 . 1 . 1 9 ? r e not r e q u i r e d to be n e t when i t s a s s o c i a t e d E C C S subsystem(s) a r e n c t r e q u i r e d to b e O P E R A B L E . T h e s e SRs demonstrate t h e DG response tr? a n E C C S s i g n a l ( e i t h e r a l o n e i;r i n c o n j u n c t i o n w i t h a l o s s - o f - p o w e r s i g n a l 1. T h j s i s c o n s i s t e n t w i t h t h e E C C S i n s t r u m e n t a t i o n requrernents t h a t d o n o t r e q u i r e E C C S s i g n a l s whsn t h e E C C S s y s t l ~ ni s R o t r e q u i r e d t o b e OPEi;.,4i;LE per iC0 3 . 5 . 2 , ECCS-Shutdwn.

GNRO-2006/00008, Technical Specification Bases Update to the NRC for Period Dated February 16, 2006

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GNRO-2006/00008, Technical Specification Bases Update to the NRC for Period Dated February 16, 2006

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