GNRO-2002/00083, Technical Specification Bases Update to NRC for Period Dated September 12, 2002

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Technical Specification Bases Update to NRC for Period Dated September 12, 2002
ML022590548
Person / Time
Site: Grand Gulf Entergy icon.png
Issue date: 09/12/2002
From: Bottemiller C
Entergy Operations
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
GNRO-2002/00083
Download: ML022590548 (13)
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Text

ter Waterloo Road P.0. BOX756 Port Gibson, Ails 39150 Tel 601 4376299 rles er Manager Plant Licensing September 12, 2002 U.S. Nuclear Regulatory Commission Washington, D,C. 20555 Attention: Document Control Desk

Subject:

Technical Specification Bases Update to the NRC for Period Dated September 12, 2002 Grand Gulf Nuclear Station Docket No. 50-416 License No. NPF-29 GNRO-2002/00083 Ladies and Gentlemen:

Pursuant to Grand Gulf Nuclear Station (GGNS) Technical Specification 5.5.11, Entergy Operations, Inc. hereby submits an update of all changes made to GGNS Technical Specification Bases since the last submittal (GNRO-2002/00064 letter dated July 23, 2002 to the NRC from GGNS). This update is consistent with update frequency listed in 10CFR50.71(e).

This letter does not contain any commitments.

Should you have any questions, please contact James Owens at (601) 437-6219.

Yours truly, JEO/jeo attachment: GGNS Technical Specification Bases Revised Pages cc: (See Next Page)

September 12,2002 GNRO-2002/00083 PAGE 2 of 2 Hoeg T. L. (GGNS Senior Resident) (w/a)

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

ReynoIds N. S. (w/a)

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

Thomas

~-~ H. L. (w/o)

U.S. Nuclear Regulatory Commission ALL LETTERS ATTN: Mr. E. W. Merschoff (w/2) 61 1 Ryan Plaza Drive, Suite 400 Arlington, TX 7601 1-4005 U.S. Nuclear Regulatory Commission ALL LETTERS - COURIER ATTN: Mr. David H. Jaffe, NRR/DLPM (w/2) DELIVERY (FEDEX, ETC.)

ATTN: ADDRESSEE ONLY ADDRESS ONLY - ***

ATTN: Courier Delivery Only Mail Stop OWFN/7D-1 11555 Rockville Pike Rockville, MD 20852-2378 I

ATTACHMENT to GNRO-2002100083 GGNS Gulf Technical Specification Bases Revised Pages dated September 12,2002 LDC# BASES PAGES AFFECTED TOPIC of CHANGE 02006 B 3.6-64,65, and 65a; B Implementation of Technical Specification Amendment 3.10-38, 39,40,41,42, 154 -Reactor Cavity Pool Draindown

SPMU System B 3.6.2.4 BASES SURVEILLANCE SR 3.6.2.4.2 REQUIREMENTS

( c o n t i nued 1 The upper containment pool water temperature i s r e g u l a r l y monitored t o ensure t h a t t h e r e q u i r e d l i m i t i s s a t i s f i e d .

The 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Frequency was developed based on operating experience r e l a t e d t o upper containment pool temperature v a r i a t i o n s during t h e appl i cab1 e MODES.

SR 3.6.2.4.3 Verifying t h e c o r r e c t alignment f o r manual, power o p e r a t e d ,

a n d automatic valves i n t h e SPMU System flow p a t h provides assurance t h a t t h e proper flow p a t h s w i l l e x i s t f o r system o p e r a t i o n . This SR does n o t apply t o valves t h a t a r e 1 ocked, seal ed, or otherwi s e secured i n posi t i on, s i n c e t h e s e valves a r e 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 being locked, s e a l e d , or s e c u r e d , This SR does n o t r e q u i r e any t e s t i n g or valve manipulation. Rather, i t i n v o l ves 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 capabl e of p o t e n t i a1 l y being m i sposi t i oned a r e i n t h e c o r r e c t posi t i o n .

This SR does n o t a p p l y t o valves t h a t cannot be i n a d v e r t e n t l y misaligned, such as check v a l v e s .

The Frequency of 31 days i s j u s t i f i e d because t h e valves a r e operated under procedural control a n d because improper valve p o s i t i o n w o u l d a f f e c t only a s i n g l e subsystem. This Frequency has been shown t o be a c c e p t a b l e through o p e r a t i n g experience.

SR 3.6.2.4.4 The upper containment p o o l has two g a t e s used t o s e p a r a t e t h e p o o l i n t o d i s t i n c t s e c t i o n s t o f a c i l i t a t e fuel t r a n s f e r a n d maintenance during r e f u e l i n g o p e r a t i o n s a n d two a d d i t i o n a l g a t e s i n t h e s e p a r a t o r pool weir wall e x t e n s i o n ,

which, when i n s t a l l e d , l i m i t personnel exposure a n d ensure adequate water submergence of t h e s e p a r a t o r when t h e s e p a r a t o r i s s t o r e d i n t h e p o o l . The SPMU System dump l i n e p e n e t r a t i o n s a r e l o c a t e d i n t h e steam s e p a r a t o r s t o r a g e s e c t i o n of t h e pool. To provide t h e required SPMU System dump volume t o t h e suppression p o o l , t h e g a t e s must be removed ( o r placed i n t h e i r s t o r e d p o s i t i o n ) t o allow communi c a t i on between t h e vari ous pool s e c t i o n s . The S u r v e i l l a n c e i s modified by a Note t h a t allows leaving I GRAND G U L F B 3.6-64 LDC 02006

S P M U System B 3.6.2.4 BASES SURVEILLANCE SR 3.6.2.4.4 (continued)

REQUIREMENTS t h e g a t e s i n s t a l l e d i f t h e Suppression Pool Low Level l i m i t i s i n c r e a s e d t o 18 f t 5 1/12 i n c h e s . (See Reference 3 ) .

The 31 d a y Frequency i s a p p r o p r i a t e because t h e g a t e s a r e moved under procedural c o n t r o l a n d o n l y t h e i n f r e q u e n t movement of t h e s e g a t e s i s required i n MODES 1, 2 , a n d 3 .

The provision t o allow g a t e i n s t a l l a t i o n i n MODES 1, 2 , a n d 3 r e s u l t s i n i s o l a t i n g a portion of t h e SPMU System dump volume. This p r o v i s i o n does n o t a p p l y t o t h e s e p a r a t o r pool weir wall extension g a t e s . These g a t e s a r e n o t r e a d i l y a c c e s s i b l e w i t h t h e upper containment pool a t i t s r e q u i r e d l e v e l . Supporting a n a l y s e s have shown t h a t i n c r e a s i n g t h e minimum suppression pool l e v e l adequately compensates f o r water trapped by i s o l a t i n g t h e f u e l s t o r a g e and/or f u e l t r a n s f e r canal a r e a s .

SR 3.6.2.4.5 This SR r e q u i r e s a v e r i f i c a t i o n t h a t each SPMU subsystem automatic valve a c t u a t e s t o i t s c o r r e c t p o s i t i o n on r e c e i p t of a n a c t u a l o r simulated automatic i n i t i a t i o n s i g n a l . This i ncl udes v e r i f i c a t i o n of t h e c o r r e c t automati c p o s i t i o n i n g of t h e valves a n d of t h e o p e r a t i o n of each i n t e r l o c k a n d t i m e r . As noted, a c t u a l makeup t o t h e suppression pool may be excluded. The L O G I C SYSTEM FUNCTIONAL TEST i n SR 3 . 3 . 6 . 4 . 6 o v e r l a p s t h i s SR t o provide complete t e s t i n g of t h e s a f e t y f u n c t i o n . The 18 m o n t h Frequency i s based on t h e need t o perform 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 during a p l a n t outage a n d t h e p o t e n t i a l f o r a n u n p l anned t r a n s i e n t i f t h e Survei 1 1 ance were performed w i t h t h e r e a c t o r a t power. Operating experience has shown t h a t t h e s e components u s u a l l y pass t h e S u r v e i l l a n c e when performed a t t h e 18 m o n t h Frequency. T h e r e f o r e , t h e Frequency was concluded 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.

This SR i s modified by a NOTE t h a t excludes makeup t o t h e suppression pool . Since a1 1 a c t i v e components a r e t e s t a b l e ,

makeup t o t h e suppression p o o l i s n o t r e q u i r e d .

(continued)

GRAND G U L F B 3.6-65 LDC 02006

SPMU System B 3.6.2.4 BASES (continued)

REFERENCES 1. UFSAR, S e c t i o n 6 . 2 .

2. UFSAR, C h a p t e r 1 5 .
3. GNRO-2002/00011.

GRAND GULF B 3.6-65a LDG 02006 I

THIS PAGE INTENTIONALLY LEFT BLANK Suppression Pool Makeup-MODE 3 3.10.9 I B 3.10 S P E C I A L OPERATIONS 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 Containment Pools w i l l l e a d t o d e l a y s i n completing outage 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 advent of t h i n g s l i k e Noble Metal a d d i t i o n technology h a s 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 a n d 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 of Table 1.1-1.

The purpose of 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 allow 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 below i t s normal l e v e l such t h a t c e r t a i n r e f u e l i n g a c t i v i t i e s can proceed p r i o r t o r e a c h i n g MODE 4 . These a c t i v i t i es i ncl ude i n s t a l 1 a t i on of 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 a n d t h e upper containment ( f u e l s t o r a g e p o o l ) a n d completely d r a i n i n g t h e reactor cavity.

APPLICABLE S u p p o r t i n g a n a l y s e s a n d engi n e e r i n g c a l cul a t i o n s determi ned SAFETY ANALYSES t h e required water inventory t o ensure t h a t the suppression pool 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 of 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 met.

S u p p o r t i n g a n a l y s e s d i f f e r from 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 of 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 s u p p r e s s i o n pool w i t h t h e remainder a v a i l a b l e from t h e s e p a r a t o r s t o r a g e pool p o r t i o n of t h e Upper C o n t a i n m e n t Pool. 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 nment s p r a y f u n c t i o n of R H R i s n o t requi red f o l 1 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 containment given t h e reduced t e m p e r a t u r e a n d 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 hold-up volume t h a t woul d 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 nventory i f containment 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 p r e s s u r e 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 s p r a y .

I n a d d i t i o n t o t h e design b a s i s a n a l y s e s , drywell bypass c a p a b i l i t y a n a l y s e s ( R e f e r e n c e 1) i n d i c a t e t h a t containment p r e s s u r e could exceed t h e containment 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 . S t e a m bypass l e a k a g e a n d 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 Reference 4 . For t h e GRAND G U L F B 3.10-38 LDC 02006

Suppression Pool Makeup-MODE 3 3.10.9 BASES APPLICABLE most 1 imi t i n g 1 arge break bypass 1 eakage capabi 1 i t y analysi s SAFETY ANALYSES (Ref. 11, operator a c t i o n t o control reactor water level i s (continued) c r e d i t e d i n ensuring t h a t s u f f i c i e n t inventory i s avai 1 able f o r containment spray o p e r a t i o n .

The contai nment 1 oads eval uati on performed f o r t h i s speci a1 operati on i ncl udi n g t h e el evated suppression pool 1 evel s demonstrates t h a t a t t h e decay time a n d reactor pressure s p e c i f i e d by t h e LCO, t h e containment loads are bounded by those ca7culated f o r the DBA LOCA.

S p e c i f i c analyses demonstrate containment temperature a n d pressure as well as radiological consequences a r e bounded by those following l a r g e a n d small break LOCAs a t f u l l power conditions. The appl i cab1 e analyses supporting t h e LCO a r e contained in References 1 , 2 a n d 3 . During these events, the SPMU System i s r e l i e d upon t o dump the separator pool water t o m a i n t a i n drywell horizontal vent coverage a n d a n adequate suppression pool heat sink volume t o ensure t h a t the primary containment i n t e r n a l pressure a n d temperature stay within design l i m i t s .

As described in LCO 3 . 0 . 7 , compliance with t h i s Special Operations LCO i s o p t i o n a l , a n d t h e r e f o r e , no c r i t e r i a of the NRC Policy Statement apply. Speci a 1 Operations LCOs provide f l exi bi 1 i t y t o perform c e r t a i n operations by appropri ate1 y modifying requi rements of other LCOs. A discussion of t h e c r i t e r i a s a t i s f i e d f o r the other LCOs i s provided in t h e i r respective Bases.

LCO A s described in LCO 3 . 0 . 7 , compliance with t h i s Special Operations LCO i s o p t i o n a l . Operation with the Upper Containment Pool l e v e l s below those specified in SR 3 . 6 . 2 . 4 . 1 c a n be achieved by e x i t i n g t h e condition where L C O 3.6.2.4 a p p l i e s . Operation with elevated suppression pool l e v e l s i s a l s o optional as operation a t l e v e l s above those specified in LCO 3.6.2.2 can be achieved by e x i t i n g the condition where the LCO a p p l i e s .

Compl i ance wi t h the Fi gure 3.10.9 - 1 1 evel requi rements ensure t h a t t h e r e i s s u f f i c i e n t overlap with t h e requirements of L C O 3.6.2.2 a n d 3.6.2.4 such t h a t the volume in containment during t h e t r a n s i t i o n t o a drained r e f u e l i n g GRAND GULF B 3.10-39 LDC 02006

Suppression Pool Makeup-MODE 3 3.10.9 BASES LCO c a v i t y f u l f i 1 1 s t h e contai nment water i n v e n t o r y requi rements (continued) assumed i n t h e a n a l y s i s . Once t h e l e v e l of t h e weir wall s e p a r a t i n g t h e r e f u e l i n g c a v i t y from t h e s e p a r a t o r s t o r a g e pool i s reached, Figure 3.10.9-1 only a p p l i e s t o t h e s e p a r a t o r pool. Supporting analyses assume t h a t t h e weir wall g a t e s a r e n o t i n s t a l l e d .

Maintaining t h e f u e l s t o r a g e a n d t r a n s f e r canal area pools e n s u r e s t h a t water t r a p s i n s i d e containment a r e minimized consi s t e n t with t h e supporting analysi s .

The r e a c t o r subcri t i cal time, suppressi on p o o l average t e m p e r a t u r e , a n d r e a c t o r steam dome p r e s s u r e a r e assumptions of t h e supporting analyses.

Entry i n t o MODE 4 operation does n o t r e q u i r e t h e use of t h i s Special Operations LCO or i t s ACTIONS.

APPLICABILITY The MODE 3 requirements may o n l y be modified f o r allowing e a r l y drain-down of t h e Upper Containment Pool while performing Noble Metal a d d i t i o n or during a r e a c t o r cool down f o r a r e f u e l i n g outage. The requirements of t h i s LCO provide conservatism i n t h e response of t h e u n i t t o a n y event t h a t may occur. Operations i n a l l o t h e r MODES a r e unaffected by t h i s LCO.

ACTIONS A Note has been provided t o modify t h e ACTIONS r e l a t e d t o drain-down of Upper Containment Pools-MODE 3. Section 1 . 3 ,

Completion Times, s p e c i f i e s once a Condition has been e n t e r e d , subsequent d i v i s i o n s , subsystems, components, or v a r i a b l e s expressed i n t h e Condition discovered t o be i n o p e r a b l e or n o t within l i m i t s , will n o t r e s u l t i n s e p a r a t e e n t r y i n t o t h e Condition. Section 1 . 3 a l s o s p e c i f i e s t h a t Required Actions of t h e Condition c o n t i n u e t o apply f o r each a d d i t i o n a l f a i 1 u r e , with Completion Times based on i ni t i a 1 e n t r y i n t o t h e Condition. However, t h e Required Actions f o r each requirement of t h e LCO n o t met provide a p p r o p r i a t e compensatory measures f o r s e p a r a t e requirements t h a t a r e n o t met. As such, a Note has been provided t h a t allows s e p a r a t e e n t r y f o r each requirement of t h e LCO.

GRAND G U L F B 3.10-40 LDC 02006

Suppression Pool Makeup -'MODE 3 3.10.9 BASES ACTIONS -

A. 1 (continued)

With t h e requirements of 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 of t h e Upper Containment Pool i s t o be suspended. Thereby, a worsening of t h e circumstances w i l l be prevented.

I f one or more of t h e requirements of t h i s Special Operations LCO a r e n o t met, t h e immediate implementation of t h e Requi red Action commences a c t i vi t i e s , which wi 11 r e s t o r e o p e r a t i o n consi s t e n t w i t h t h e Speci a1 Operations LCO. 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.

Required Action A . 2 . 2 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 of Required Action A . 2 . 1 t o r e s t o r e compliance with t h e normal MODE 3 requirements, thereby e x i t i n g t h i s Speci a1 Operations LCOs Appl i cabi 1 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 sh compl i ance with t h e appropri a t e Technical Specification.

B.2 I f t h e requirements of t h i s Special Operations LCO o r t h e normal MODE 3 requirements cannot be met within 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 n o t 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 with t h e time provided i n LCO 3 . 0 . 3 f o r reaching MODE 4 from MODE 3.

( c o n t i nued 1 GRAND GULF B 3.10-41 LDC 02006

Suppress! on Pool Makeup - MODE 3 3.10.9 BASES (continued)

SURVEILLANCE SR 3 . 1 0 . 9 . 1 a n d SR 3.10.9.2 REQUIREMENTS V e r i f i c a t i o n of t h e Suppressi o n Pool t e m p e r a t u r e a n d Steam Dome p r e s s u r e e n s u r e s t h a t a s s u m p t i o n s of t h e s u p p o r t i n g a n a l y s e s f o r t h i s Speci a1 Operations LCO a r e c o n t i n u a l l y met. T h e r e f o r e , t h e p l a n t response t o a n a c c i d e n t while i n t h i s Special Operations LCO w i l l remain bounded by t h e Design Basis Loss of Coolant Accident.

The Frequency of 1 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> i s based on e n g i n e e r i n g judgement a n d i s c o n s i d e r e d adequate due t o t h e u n l i k e l y e v e n t of unknowingly a d d i n g h e a t t o t h e Suppression Pool o r i n c r e a s i n g Reactor p r e s s u r e .

SR 3.10.9.3 V e r i f i c a t i o n of t h e requi red Upper Containment Pool a n d Suppression Pool l e v e l s t o be w i t h i n l i m i t s e n s u r e s t h a t t h e e n g i n e e r i n g assumptions f o r t h e c a l cul a t i o n s s u p p o r t i n g t h i s Special O p e r a t i o n s LCO a r e c o n t i n u a l l y met. These assumptions e n s u r e s u f f i c i e n t i n v e n t o r y i s a v a i l a b l e such t h a t Drywell v e n t submergence a n d Suppression Pool h e a t s i n k requi rements a r e met.

The Frequency of 1 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> i s based on e n g i n e e r i n g judgement a n d i s c o n s i d e r e d adequate i n view of t h e l a r g e volume of water a n d t h e normal procedural c o n t r o l s on v a l v e p o s i t i o n s ,

which make s i gni f i c a n t unpl anned 1 eve1 changes unl i kel y .

SR 3 . 1 0 . 9 . 4 V e r i f i c a t i o n of t h e r e q u i r e d Fuel S t o r a g e a n d T r a n s f e r Canal Pool l e v e l s t o be w i t h i n l i m i t s e n s u r e s t h a t t h e e n g i n e e r i n g assumptions f o r t h e c a l cul a t i o n s s u p p o r t i n g t h i s Speci a 1 Operations LCO a r e c o n t i n u a l l y met. These assumptions e n s u r e s u f f i c i e n t i n v e n t o r y i s a v a i l a b l e such t h a t Drywell v e n t submergence a n d Suppression Pool h e a t s i n k requirements a r e met.

The Frequency of 1 2 h o u r s i s based on e n g i n e e r i n g judgement a n d i s c o n s i d e r e d adequate i n view o f t h e l a r g e volume of water a n d t h e normal procedural c o n t r o l s on v a l v e p o s i t i o n s ,

which make s i g n i f i c a n t unplanned l e v e l changes u n l i k e l y .

( c o n t i nued GRAND GULF B 3.10-42 LDC 02006

S u p p r e s s i o n P o o l Makeup-MODE 3 3.10.9 BASES (continued)

REFERENCES 1. C a l c u l a t i on XC-QlM10-01012, MODE 3 C o n t a i n m e n t A n a l y s i s a t Reduced R e a c t o r P r e s s u r e .

2. C a l c u l a t i o n XC-QlE30-01004, S u p p r e s s i o n P o o l Makeup System - MODE 3 .
3. C a l c u l a t i o n XC-Q1111-01011, MODE 3 LOCA Dose A n a l y s i s .
4. UFSAR 6 . 2 . 1 . 1 . 5 .

GRAND GULF B 3.10-43 LDC 02006

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