ML20199G390

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Proposed Tech Specs Facilitating Treatment of Trip Setpoints as Nominal Values & Correct Certain Typos
ML20199G390
Person / Time
Site: Vogtle  Southern Nuclear icon.png
Issue date: 11/20/1997
From:
SOUTHERN NUCLEAR OPERATING CO.
To:
Shared Package
ML20199G377 List:
References
NUDOCS 9711250169
Download: ML20199G390 (55)
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Text

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. ENCLOSURE 3 VOGTLE ELECTRIC GENERATING PLANT REQUEST TO REVISE TECIINICAL SPECIFICATIONS REACTOR TRIP SYSTEM AND ENGINEERED SAFETY FEATURE ACTUATION SYSTEM INSTRUMENTATION TRIP SETPOINTS MARKED-UP TECIINICAL SPECIFICATION AND BASES PAGES-i l

The following pages from VEGP Unit I and Unit 2 TS LCOs 3.3.1 and 3.3.2 have been marked to show the proposed changes, in addition, clean typed pages reflecting the proposed changes have been provided.

9711250169 971120 "

PDR ADOCK 05000424 P PDR E3 I .

RTS Instrumentation 3.3.1 Table 3.3.1 1 (pepe 1 ef 8)

Reacter Trip system Instrasentation APPLICARLE M(2ES g)g OR OfMER PfCIFIED REQUIRED SURVEILLANCE ALLthdABLE TRIP [n stTPo!WTCj CONDITIONS REOUIREMENTs VALUE FUNCT10N CON 0lfl0Ns CMANNELs

1. menust Reacter 1,2 2 3 st 3.3.1.13 NA NA Trip JI '3, 4I '3, SI *I 2 C st 3.3.1.13 NA mA
2. Power Renee

. heutron flun

    • High 1,2 4 0 st 3.3.1.1 s 111.31 RTP 1991 RTP st 3.3.1.2 st 3.3.1.7 st 3.3.1.11 SR 3.3.1.15 st 3.3.1.1 s 27.3% RTP s 251 RTP
b. Lew 1(b),2 4 E SR 3.3.1.8 st 3.3.1.11 st 3.3.1.15 I g SR 3.3.1.7 s 6.3% RTP 1 RTP
3. Power Renee 1,2 4

,' st 3.3.1.11 with flee th time seutron Flus Ni$ constant constant Positive Rate a 2 sec t 2 see 1(b), 2I 'I F,G st 3.3.1.1 s 31.11 RTP s 251 RTP -

4. Intermediate Renee 2 heutron Flun st 3.3.1.3 st 3.3.1.11 2Id3 2 N sa 3.3.1.1 s 31.11 RTP s 251 RTP

' st 3.3.1.s sa 3.3.1.11 j

(continued) f (a) With Reactor Trip treekers (RTss) cleaed and Red Centret systes capable of red withdrawel.

(b) DeLow the P 10 (Power Renee Woutron Flum) intertecks.

(c) Above the P 6 (Intermediate Renee heutron Flux) intertecks.

(d) Below the P 6 (Intermediate Renee toutron FLw) intertecks.

(n) The Trip Selpids mcur k sd a coamfimk 4e Homiss' ulos os seaswy in depex fop 4d cadious.

l l

l Vogtic Units 1 and 2 3.3-14 Amendment No. 96 (Unit 1)

Amendment No. 74 (Unit 2)

RTS Instrumentation 3.3.1 febte 3.3.1 1 (pese 2 of 83 asector Trip system instrumentation MM

  1. ST,g ataulatp suavtILLAuct AttouAsts talp s*fc!FIED conDl710Ns ataulatatuts VALut stfro!N Func730W couplTIOus chamutts 1,J Sa 3.3.1.1 s 1.4 E5 s 1.0 E5 2(d) 2 eps
5. Source a m sa 3.3.1.8 ces toutten itua sa 3.3.1.11 sa 3.3.1.15 sa 3.3.1.1 s 1.4 E5 1.0 E5 3(*I,4(a),5(*) 2 J,E sa 3.3.1.7 ces ces sa 3.3.1.11 sa 3.3.1.15 NA i

3('),4('3,5(') 1 L sa 3.3.1.1 mA sa 3.3.1.11 l

4 sa 3.3.1.1 Refer to aefer to

6. Onetenswroture 4T 1,2 I mete 1 mete 1 sa 3.3.1.3 sa 3.3.1.6 (Pese (Pese sa 3.3.1.7 3.3 20) 3.3 20)

Sa 3.3.1.10 sa 3.3.1.15 4 E sa 3.3.1.1 Refer to Refer to

7. Overpower of 1,2 mete 2 mete 2 sa 3.3.1.7 sa 3.3.1.10 (Poes (Pese sa 3.3.1.15 3.3 21) 3.3 21)

{sentinued) l I With aTSs closed and med Centrol system capable of red uithdrawel.

l (s)

(d) Selow the P*6 (Intennediate tonee moutron flum) intertecks.

(e) With the af8s apen. In this condition, source rense function does not provide reactor trip but does provide trymat to the mich flist at shutdown t.Lorm system (Lc0 3.3.8) and indicetton.

(n) The Trip Setpoin's mr.y be set more conservative than the Nominal value as necessary in response to plant conditions.

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\

3.3-15 Amendment No. 96 (Unit 1)

Vogtle Units 1 and 2 Amendment No. 74 (Unit 2) l i

I RTS Instrumentation 3.3.1 table 3.3.1 1 (pope 3 of 8)

Reactor trip system Instrumentation

]

^"',',i^g(P" yowwAL.

SPECIFIED REsulRED suaVEILLANCE ALLOWAsLE TRIP FUWCTION CONDITIONS ChAmWELS Coelfl0NS REsulREMENTS VALUE SETPo!N

8. Pressuriser Pressure
a. Law 1(I) 4 M st 3.3.1.1 1 IMO psis a 1N0(8I sa 3.3.1.7 pois BR 3.3.1.10 sa 3.3.1.15
b. alsh 1,2 4 I sa 3.3.1.1 s 23M pois 2385 pois sa 3.3.1.7 sa 3.3.1.10 SR 3.3.1.15
9. Pressuriser Water 1(II 3 M st 3.3.1.1 s 73.91 921 Level - W t sh SR 3.3.1.7 st 3.3.1.10
10. Reactor Coolant F low - Low
e. sinste Loop 1(h) 3 per N SR 3.3.1.1 t 89.41 Loop sa 3.3.1.7 SR 3.3.1.10 sa 3.3.1.15
b. Two Loops 1(I) 3 per M sa 3.3.1.1 a 39.41 toep at 3.3.1.7 SR 3.3.1.10 SR 3.3.1.15 (continued)

(f) Above the P 7 (Lew Power Reactor Trips dicck) Interteck, ts) Time constants utill ed in the f eed tes controller for Pressuriser Pressure Lew are 10 seconds for lead and i second for ies.

(h) Above the Pas (Power Range heutron FluR) laterteck.

(i) Above the Pa7 (Low Power Reactor trips stock) Interlock and below the Pas (Power Range Neutron Flum) interlock.

(n) ne Trip Setpoints may be set more conservative than the Nominal value as necessary in response to plant conditions.

Vogtle Units 1 and 2 3.3-16 Amendment No. 96 (Unit 1)

Amendment No. 74 (Unit 2)

__ _ . ~ . .

1 RTS Instrumentation 3.3.1 Table 3.3.1 1 (pose 4 of 8)

Reactor Trip System Instrumentation 0 ME N

sPECIFIED REGUIRED SURVEILLANCE ALLOWAsLE TRIPJg FUNCTION COWITIONS CNANNELS CONDITIONS REeulkEMENTS VALUE sETPOINF a

11. Undervolteee tif) 2 per M SR 3.3.1.9 sa 3.3.1.10 t 9441 V [9600V RCPs bus sa 3.3.1.15
12. Underfregaency 1(f) 2 per M sa 3.3.1.9 t 57.1 Hz a 57.3 Mr RCPs bus at 3.3.1.10 sa 3.3.1.15
13. steam 1,2 4 per SG E sa 3.3.1.1 2 35.9% 37.8%

Generator (SC) sa 3.3.1.7 Weter Level-Low S3 3.3.1.10 Low st 3.3.1.15 (centinued) l l

(f) Above the P F (Low Power Reactor Tripe Block) Interlock.

l I (n) The Trip Setpoints may be set more conservative than the Nominal value as necessary in response to plant conditions.

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! Vogtle Units 1 and 2 3.3-17 Amendment No. 96 (Unit 1) l Amendment No. 74 (Unit 2)

RTS Instrumentation 3.3.1 Table 3.3.1 1 (pose 5 of 8) teactor Trip system Instrumentation 0 nt N

SPECIFIED REeutRED SURVEILLANCE ALLOW 4sLE TRIP fn FUNCTION CoelTIONS CM4mutLS Comifl0NS REOUIREMENTS VALUE SETPolNU'}

14. Turbine Trip
e. Lou Fluid Ott 10) 3 0 st 3.3.1.10 t 500 psis 580 pois Pressure st 3.3.1.16 e
b. Turbine stop 10) 4 P st 3.3.1.10 t 40e88> 96.7%

SR 3.3.1.14 open open Ve1ve CLoeure

15. safety 1,2 2 traine e at 3.3.1.13 mA mA Injection ($1)

Irput from

. Engineered sefety foeture Actuation system (ESFAS) >

16. Reactor Trip system Interlocks
o. Intermodlate 2(d) 2 R st 3.3.1.11 2 6E 11 esp 1E 10 og Renee neutron SR 3.3.1.12 Flux, P 6
b. Low Power i 1 per s st 3.3.1.5 NA NA Reactor Trips train stock, P 7 4 s st 3.3.1.11 s 50.31 RTP 481 RTP
c. Power Renee g Woutron Flux, SR 3.3.1.12 P8 4 8 st 3.3.1.11 s 52.3% RTP s 50% RTP
d. Power Renee heutron Flux, i st 3.3.1.12 P9 4 R SR 3.3.1.11 (1,m) (t,m)
e. Power Renee Neutron Flux, 1,2 st 3.3.1.12 P 10 and loput to P T 2 s SR 3.3.1.10 s 12.3% 10%

Turbine lopulse 1 SR 3.3.1.12 lopulse lopulse f.

Pressure, P 13 Pressure Pressure E pivalent E pivelent turbine turbine (continued)

(d) setow the P 6 (Intermodlate Renee toutron Flux) interlocks.

I (j) Above the P 9 (Power Renee Neutron Flux) Interlock. QQ 101 RTP.

(t)I for the P 10 Irpu? to P 7, the Attowebte Vetue la 512.3% RTP and the rip setpoint is t

(m) for the Power Renee Neutron Flux, P 10, the Atloweb's Vetue is t 7.7% RTP and the, Trip setpoint is 6 101 RTP. g (n) The Trip Setpoints may be set more conservative than the Nominal value as necessary in response to plant conditions.

Vogtle Units 1 and 2 3 3-18 Amendment No. 96 (Unit 1)

Amendment No. 74 (Unit 2) l

RTS Instrumentation 3.3.1 table 3.3.1 1 (pose 6 of 8)

Rewtor f elp System Instrumentstion YE ALLOWASLE TRIP SPECIFIED REGUIRED SURVEILLANCE 83 REeulREMENTS VALUE SETPOIN  %

CONDif10NS CNAeufLS CONDIT!DNS FUNCTION NA 1,2 2 tralm 1,Y SR 3.3.1.4 NA

17. Reactor 1[lp treekersi 3 st 3.3.1.4 NA NA 3(a), g(e),$(s) 2 trains C SR 3.3.1.4 NA NA
18. Reacter trip 1,2 1 each U,V treeker per RTS Uruterveltage and nA thet Trip 3(*I, 4(*I, 5(*I 1 each C st 3.3.1.6 NA tochantees Mr RTB NA 19 Automatic Trip 1.2 2 treins e,y sa 3.3.1.5 NA Letic sa 3.3.1.5 NA NA 3(a), 4(a), 5(*I 2 trains C (0) With RTBs cieced end Red Centret System capable of red withdrawal.

(k) including any reacter trip bypees breakers that are rocked in and cleted for imiessing en A78. ,

(n) The Trip Setpoints may be set more conservative than the Nominal value as necesery in response to plant conditions.

Vogtle Units I and 2 3.3-19 Amendment No. 96 (Unit 1)

Amendment No. 74 (Unit 2)

RTS Instrumentation L 3.3.1 febte 3.3.1 1 (pose 7 of 8) teactor Trip system Instru'entation hate it owetemperatuee Dette*T 041M ip Setpoint defined t,y the following The Overtemperature Dette.T pmetion Alloweble Vetue shall not exceed the esatten by more then 2.25% of RTP.

(1

  • f4SI 1 g AT (1 * ? tSI 1 g ,g 7 -T' - Ka>#-PI- f (AFD) t A1, (1
  • v gs) 11
  • t a*8 3

II

  • Tt *I , II
  • T e SI j Idhere: 41 seesured loop specific RC$ differentist temperature, degrees F AT, Indicated loop speelfic BCS differentist et RTP, degrees F l'igt need leg cenpensator en sensured differentist temperature 1*t go time constents utitlaed in Leed Les compensetor for dif forentist toeperatures eg a 8 seconds, ti e 's e , s 3 seconds 1

1 *' 38 L*# 88'pensator en enesured differentist tosperature T, time constant utillred 1 og compensator for difforentist temperature, s 2 seconds Ki fwuammentet setpoint, 121 ITP modi'ler f or temperature, a 2.241 RTP per degree f K2 1.*241 1*fgs tsed tog cempensetor on dynamic tanperature cempensetien te, fg time constants utilized in Leed Leg campensator for temperature compensations fe t 28 secones, f6 3 4 seconds T

measured loop specific RCS everage temperature, destees F 1

tag compensator en asseured everage temperature 1*Tes time constant utilized in Les compensator for everage tosperature, e 0 seconds to indicated Loop specific RC everage toeperature et RTP, 4 degrees F T'

Kg modifier for pressure, 0.1151 RTP per pois P

esesured RCS pressuriter pr sure, psig P' reference pressure, 2235 pais e Leptoce transform verlebte, inwree seconds fg(AFD) modifier for Amlet flui Olfference (AFD): *

1. for AFD between 321 and *101, = 01 RTP
2. for each 1 AFD is below 321, the trip setpoint shett be redJced by 3.251 RTP
3. for each 1 AFD la abow *101, the trip setpoint shett be reeaced by 2.71 RTP 3.3-20 Amendment No. 96 (Unit 1)

Vogtle Units 1 and 2 Amendment No. 74 (Unit 2)

l RTS Instrurtentetion I 3.3.1 f .

l febte 3.3.1 1 (pope 8 of 8)

Reactor Trip System instrumentation este 2r oveetmsee Delta T 8fl The Overpower Dette T Function ALLOW 48LE VALut shall not exceed the Trip setpoint defined ty the following ogastion by more then 2.851 of RTP.

1 T - K,T -T # -f (AFD) 2 100s .# " * 'o u . g . K[4-Kg n .,,o n .,, u . ..e , o .es Weret af measured loop specific RCS differentist temperature, degrees F ATg Indicated loop specific BCS differentist et ATP, degrees F J,.+1g1 leeJ tes compensator en sessured differentist temperature 1+vas tg, v2 time constents util(tod in teed tog compeneetor for dif ferentist temperatures fg a 8 seconds, e s 3 secones 1

1+13e too compensator on measured dif ferentist temperature flee constant utillied og compensator for dif f erentlet temperature, s 2 seconds

'a K4 forusementet setpoint. 09.51 2TP modifier for temperature change: 21 RTP per degree F for increasing temperature, t 01 RTP Kg per degree F for decreasing tempe ture

.!.11.

1+tys rate tes conpensator en dynamic temperature compensation ty tieu constant utilised in rate los compensator for temperature compensation, t to seconds i

measured loop speelfic RCS ewrese temperature, degrees F i

too compermator en meesured over temperature 1+v.s time constant utill ed in tag suponsetor for eversee temperature, = 0 seconds To endifler f or tosperature: 0.205 RTP per degree F for i > T' = 01 tTP for i s T' K,

88.4 degrees F T' indicated loop specific RCS eversee temperature et RTP, s Leptoce transform variebte, inverse seconds f 2(AFD) modiller for Aalet Flut Dif ference (AFD), m 01 RTP for ett Att 3.3-21 Amendment No. 96 (Unit 1)

Vogtle Units 1 and 2 Amendment No. 74 (Unit 2)

ESFAS Instrumentation 3.3.2 febte 3.3.2 1 (pese 1 of 7)

Engineered Safety f eature Actuetten system Instrumentation APPLICA8LE 1 3 SPECIFIED REOUIRED SLmVEILLANCE ALLOWA8LE ft!P /*

fuMCTION CONDITIONS CNANNELS CONDITIONS REaulatnENTS VALUE SETPo!NT4}

1. Safetyinjection
s. honust inittetten 1,2,3,4 2 s SR 3.3.2.6 m M
b. Automatic 1,2,3,4 2 C SR 3.3.2.2 M M Actuation teste SR 3.3.2.3 and Actuation SR 3.3.2.5 teleys
c. Centairment 1,2,3 3 D SR 3.3.2.1 5 4.4 pois s .8 pois Pressure - Mish 1 sa 3.3.2.4 SR 3.3.2.7 la 3.3.2.8
d. Pressuriser 1,2,3(e) 4 0 Sa 3.3.2.1 t 1854 pois t 1870 pois Pressure - Low SR 3.3.2.4 SR 3.3.2.7 SR 3.3.2.8 i
e. Steam Line 1,2,3(e) 3 per D SR 3.3.2.1 570N t N

Pressure Law steen SR 3.3.2.4 pois Line SR 3.3.2.7 [psig SR 3.3.2.8 (setinuse)

(e) Above the P 11 (Pressuriser Pressure) interteck.

(b) flee constants med in the Leed/tes contretter are tg a 50 seconds eruf t2 s 5 secoruss.

Theconditions.

plant Trip Setpoints may be set more conservative than the Nominal value as necessary in respo Vogtle Units 1 and 2 3.3-30 Amendment No. 96 (Unit 1)

Amendment No. 74 (Unit 2)-

ESFAS Instrumentation 3.3.2 Table 3.3.2 1 (pose 2 of 7)

Enstneered safety Feature Actuation System Instrumentation APPLICAsLE NEn REsulRED SURVEILLANCE ALLOWAsLE TRsP SPECIFIED CONDITIONS CHANNELS CDMDITIONs REeulREMEWis VALUE stTPCINT FUNCTIDW

2. Contalrument sprey
e. mareast inittetton 1,2,3,4 2 I st 3.3.2.6 NA mA
b. Autenstic 1,2,3,4 2 C sa 3.3.2.2 MA mA Actuation Logic sa 3.3.2.3 and Actuetten SR 3.3.2.5 Reteys
c. Centalrument

. Pressure 1,2,3 4 E st 3.3.2.1 5 22.4 pais s 21.5 psis

  1. f sh - 3 sa 3.3.2.4 sa 3.3.2.7 sa 3.3.2.8 (continued)

,.5 The Trip Setpoints may be set more conservative than the Nominal value as necessary in response to

(),J plant conditions.

Vogtle Units 1 and 2 3.3-31 Amendment No. 96 (Unit 1)

Ar.sndment No. 74 (Unit 2)

1 l

ESFAS Instrumentation 3.3.2 febte 3.3.2 1 (pose 3 of 7)

Engineered Saf ety feature Actuotton System instrumentetlun I

APPLICA4LE NODES OR ppg lhh ,

DTHER TalP SURVEILLANCE ALLOWA8LE SPECIFIED REOUIRED REGUIaEMENf5 VALUE StTPOINT CONDITIONS CMANNEL5 COND1TIONS FUNCfION

3. Phase A Centainment leetetten sa 3.3.2.6 mA mA 1,2,3,4 2 s (a) menuel Initiation 1,2,3,6 2 trains C st 3.3.2.2 NA NA (b) Automatic sa 3.3.2.3 Actuation Logic and Actuotten sa 3.3.2.5 meteys (c) Safety injection Refer to F mction 1 (lefety injection) for ELL inittstion functions eM rooJirements.
4. Stees Line teoletim NA
e. herual Initiation 1,2(c) 3(c)

, 2 7 sa 3.3.2.6 NA NA

b. Automatic 1,2(c) 3(c) 2 G so 3.3.2.2 NA Actuellen Logic st 3.3.2.3 and Actuation sa 3.3.2.5 Retsys (continued)

(c) Encept when one win eteem isolation volve and essectated bypees (seletion velve per steem tine is closed.

The Trip 5etpoints may be set more conservative than the Nominal value as necessary in response to plant conditions.

(

3.3-32 Amendvent No. 96 (Unit 1)

Vogtle Units I and 2 Amendment No. 74 (Unit 2)

ESFAS Instrumentation 3.3.2 f ebte 3.3.21 (pspe 4 of 7)

Instreered letety Iesture Actuetten Svstem Instrumentetten APPLitASLt tute fIIP FUNCflok SPtClIlft CouDittout itDUIRfD CNAustLS COM0!fl0NS

$UtVIILLANCE REtulatMENTS ALLOWA4LE VALut SETPolW )

4 iione ti- isoisii.

(centiruJed) 1.P(8I, 3 0 et 3.3.2.1 s 15.4 pals 14.5 pels

8. Centelement Preneure - Nigh 2 sa 3.3.2.6 3gg) sa 3.3.2.7 to 3.3.2.8
d. Steen Lire Pressure .

1,2(8I, 3 per 0 se 3.3.2.1 1 $70 (DI 585 (b)

(1) Lew puts pels 3(gggg) steen la 3.3.2.4 Line la 3.3.2.7 la 3.3.2.8 (2) Weoettve 3(8I(8I 3 per 0 sa 3.3.2.1 s 125 I'I 100 I'I Rote = Wish stoon la 3.3.2.4 pel/6ec rel/ set tlne at 3.3.2.7 ta 3.3.2.8 teens triese) to) above the P*11 (Pressurtser Pressure) intertect.

(b) flee cenetents used in the need/tes controtter are tg a 50 seconds and te s 5 sece.

(c) Escs.st when ern sein steem tootetten volve and essectated trypass tsetetten volve per steen line is closed.

(d) setow the P*11 (Pressurtter Pressure) interteck.

(e) Time constant utilised in the rete /tes controlter is * $0 seconde.

($) The Trip Setpoints may be set more conservative than the Nominal value as necessary in res plant conditions.

Vogtle Units 1 and 2 3.3-33 Amendment No. 96 (Unit 1)

Amendment No. 74 (Unit 2)

b- ESFAS Instrumentation 3.3.2 table 3.3.2 1 tpose 5 of 7)

Engineered lefety f eature Actuotten Systee Instrumentation APPLICABLt i a setCIFl[D RtaVittD suavtlLLANCE ALLtWAsLt falP / -

REOUIREMfMTS VALUE stTPolNt, FUNCil0N CON 0lfl0NS CHANNELS CONDifl0NS

5. Turbine Irlp and .

Fosesster isoletten

a. Automatic 1,2 0I 2 trela N sa 3.3.2.2 NA NA Actuetten Logic sa 3.3.2.3 and actuetten et 3.3.2.5 3.te,.

f

b. Low RCS tavs 1,2 0I 4 I sa 3.3.2.1 2 541.5 't hSM 'F M 3.3.2.4 sa J.3.2.7 Coincident with Refer to f atten ne for ELL P 4 rewirements.

Seector trip, P 4 1,2 0I 4 per SG l sa 3.3.2.1 s 87.9% 36.01

c. 30 Water sa 3.3.2.4 LoveL - Nish Mith (P 14) sa 3.3.2.7 sa 3.3.2.s W. Safety injection befer to f atten t (sofety injectlan) for ett initletten f atione and rewirements.
6. Aunillery f eechester
s. Automat ic 1,2,3 2 treine G sa 3.3.2.2 mA mA Actuetten Losic sa 3.3.2.3 and Actuet ten sa 3.3.2.5 teleys 1,2,3 4 per sc 0 sa 3.3.2.1 a 35.91 37.81
b. 50 Water sa 3.3.2.4 Level - Lew Low at 3.3.2.7 sa 3.3.2.s (centinued)

(f) tacept whei, one MFly er MFtV, and its essectated bypots volve per feedseter Line le closed and aloectivoted or tsetated by a cleted snartel volve.

(d) The Trip Setpoints may be set more conservative than the Nominal value as necessary in tupo plant conditions.

Vogtle Units 1 and 2 3.3-34 Amendment No. 96 (Unit 1)

Amendment No. 74 (Unit 2)

ESFAS Instrumentation 3.3.2 Table 3.3.2 1 (pape 6 of 73 Ergineered Safety f eature Actuotten Erstem Instrumentation I l

APPLICASLE i a b

ALLinABLE TRIP SPttiflED Ritultt0 SutVtlLLANCE MTPolv CnAustLS ConDifl0NS RiegletMtwfs yAtut FWCfl0W ConDifl0ml

6. Awillery f eesheeter l (eentirased)
c. Safetyinjection Refer to function 1 (Safety injectlan) for all inittetten fimettens and rewireemets.

1 per J ta 3.3.2.4 4A mA

d. Telp of all kein 1.2(83 f oesheeter Paes map
7. Seel.outsestic Switchever to Centairement See h4 mA
e. Automet h 1,2,3,4(h) 2 C se 3.3.2.2 Act ~..en Logic sa 3.3.2.3 i and Actuetten at 3.3.2.5 l seleye t 364.9 in. 275.3 in. l
b. Refueling Weter 1,2,3,4 & E sa 3.3.2.1 storeee lenk sa 3.3.2.4

(# WET) trvel - Low at 3.3.2.7 Low sa 3.3.2.8 Coincleont with gefer to function 1 (lefety injection) for ett initletion Safety injection timettens and rosestrosents.

tcentirmsso)

(g) When the kein f eesheeter System 8a operating to empty the $Gs.

(h) In IGE 4, only 1 train is rosesired to be OPitASLE to sweert emeleeutsenstic evitchever for the RNA puup that is rossaired to be OPERABLE in eccertence with Specification 3.5.3 Eccs.shuteewn.

.1 l 'the Trip Setpoints may be set more conservative than the Nominal value as necessary in tesponse to (4 '

plant conditions.

Vogtle Units 1 and 2 3.3-30 Amendment No. 96 (Unit 1)

Amendment No. 74 (Unit 2)

ESFAS Instrumentation 3.3.2 fette 3.3.t 1 (nepe ? ef 7)

Insineered Sefety Feeture actuetien systom Instrumentetten APPLICA4LE OtME H0MtML SPECIFit0 Attu1 BED SURVIILLANCE ALLOWASLE TRIP l FUNCflou Couplfl0ml CMAWWELS COM0!fl0NS RFOU18tMWil VALUE BETPolN /

8. ISFAB Intertecks
a. Reector felp, P 4 1,2,3 1 per F M 3.3.2.9 mA siA train, 2 treins
b. Pressuriser Pressure, 1,2,3 3 L st 3.3.2.4 s 2010 pais 2000 pois P+11 M 3.3.2.7 f .1 I / j The Trip Serpoints may be set more conservative than the Nominal value as necessary in response to k plant conditions.

Vogtle Units 1 and 2 3.3-36 Amendment No. 96 (Unit 1)

Amendment No. 74 (Unit 2)

. RTS Instrumentaticn [

, B 3.3.1 i

BASES i l i SACKGROUND Reactor Trin Switchaear (continued)  ;

. - i i trip mechanism is sufficient by itself, thus providing a  ;

diverse trip mechanism. .

The decision logic matrix fun tions are described in the-  !

functional diagrams included ha Reference 1. In addition to the reactor trip or ESF, these diagrams also describe the  !

4 various "pemissive interlocks" that are associated with 'i unit conditions. Each train has a built in testing device _ l that can automatically test the decision logic matrix  !

Functions and the actuation devices while t3e unit is at *

power. When any one train is taken out of service for i

testing, the other train is capable of providing unit i monitoring and protection until the testing has been i

- completed. The testing device is semiautomatic to minimize  :

L testing time.

APPLICABLE' The RTS functions to maintain the SLs duri mitigatestheconsequencesofDBAsinallballA00sandES in LCO, and SAFETY ANALYSES, l l LCO, and which the RTBs are closed.

APPLICABILITY

Each of the analyzed accidents and transients can be L detected by one or more RTS Functions. The accident
analysis described in Reference 3 takes credit for most RTS

. trip Functions. RTS trip Functions not spccifically  !

credited in the accident analysis are qualitatively credited ,

in the safety analysis and the NRC staff approved licensing basis for the unit. These RTS trip Functions may provide protection for conditions that do not require dynamic transient analysis to demonstrate Function perfomance. .

They may & Iso serve as backups to RTS trip Functions that 1

were credited in the accident analysis. '

1 The LC0 requires all instrumentation performing an RTS '

, Function, listed in Table 3.3.1-1 in the accompanying LCO, c to be OPERABLE. Failure of any instrument renders the j affected channel (s) inoperable and reduces the reliability

of the affected Functions. A

/h N The LCO generally requires hPERABILITY of four or three 7 channels in each instrumentation Function, two channels of Manual Reactor Trip in each logic Function, and two trains in each Automatic Trip Logic Function. Four OPERABLE I

(continued) l Vogtle. Units 1 and 2 B 3.3-7 Revision No. O

___ _._ ._. _ _ _u - .._ __ _ _ _ _ _ _ _ . - . . _ . _ . _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ -

INSERT FOR llASES PAGE H 3.3-7

'lhe Nominal Trip Setpoint column is modified by a Note that allows the Trip Setpoint to be set more conservatively than the nominal value. The conservative directic" is established by the direction of the inequality applied to the Allowable Value. For example, the Power Range Neutron Flux Iligh trip setpoint may be set to a value less than 109 % during initial startup following a refueling outage until a sufficiently high reactor power is achieved so that the power range channels may be calibrated, in addition, certain Required Actions may require that the Power Range Neutron Flux liigh trip setpoints be reduced based on plant conditions.

RTS Instrumentation

.- B 3.3.1 BASES APPLICABLE 6. Overtemperature AT (continued)

SAFETY ANALYSES, LCO, and This results in a two-out-of-four trip logic. Section APPLICABILITY 7.2.2.3 of Reference 1 discusses control and protection system interactions for this function. Note that this Function also provides a signal to generate a turbine runback prior to reaching the Trip Setpoint.

A turbine runback will reduce turbine power and reactor power. A reduction in power will normally alleviate the Overtemperature AT condition and may  ;

prevent a reactor trip.

Delta T , as : sed in the overtemperature and overpower AT trip,s, represents the 100% RTP value as measured '

. for each loop. This norinalizes each loop's AT trips

to the actual operating conditions existing at the i

time of measurement, thus forcing tha trip to reflect '

the equivalent full power condit<ons as assumed in the accident analyses. These differences in RCS loop AT can be due to several factors, e.g., differences in ,

RCS loop flows and slightly asymmetric power-

, distributions between quadrants. While RCS loop flows are not expected to change with cycle life, radial

.! power redistribution between quadrants may occur, resulting in small changes in loop sr 41fic AT values.

Therefore, loop specific AT, values are measured as no6ded to ensure they represent actual core conditions. ,

he L.C0 requires all four channels of the M/JMY Overtemperature AT trip Function to be OPERABLE.i Note l 9 that the Overtemperature AT Function receives input f/ from channels shared with other RTS Functions.

Failures that affect multiple Functions require entry into the Conditions applicable to all affected Functions.

In M00E 1 or 2 the Overtemperature AT trip must be OPERABLE to prevent DNB. In MODE 3, 4, 5, or 6, this i trip Function does not have to be OPER%LE because the reactor is not operating and there is insufficient  :

heat production to be concerned about DNB.

4 4

(continued)

Vogtle-units 1 and 2 B 3.3-16 Revision No. 0

. .,__., _ .,.._..__i .~ ... __ , _ . -., .., ... _ _. .._.. .L.. __ ._..__._,_.__....__.,_.,__m.. . _ , . . . . . . - , , . - . . . . , . , . . _ . - - .

INSERT FOR llASES PAGE B 3.3-16 i

The values for K i, K .2 K), T', and P' may be treated as nominal values (br the purpose of l performing a CilANNEl, CAllBRATION. The direction of conservatism for these values is as follows:

Ki sidentified Value K22 Identified Value K 32 Identified Value T' s identified Value P' % Identified Value Note that K i is the principle setpoint gain, since it defines the function offset. K 2and K3 define the temperature gain and pressure gain respectively. The values for T' and P' are key reference parameters corresponding directly to plant safety analyses initial conditions assumptions for the Overtemperature AT Function. The as left settings for these parameters should be as close as possible or conservative with respect to tne identified values, in order to ensure that the Overtemperature AT setpoint is consistent with the assumptions of the safety analyses,it is necessary to verify during the CilANNEL OPERATIONAL TEST, that the Overtemperature AT setpoint is within the appropriate calibration tolerances for conditions where the temperature input is equal to T' and the pressure input is equal to P', and that appropriate penalties are generated to reduce the setpoint for a temperature input greater than T', and again for a pressure input less than P' (Ref. 9)

l RTS Instrumentatien 8 3.3.1 t

BASES f APPL 1.'4LE 7. Overoower AT (continued)

SAFET', ANALYSES,

- LCO, and Delta-T , as used in the overtemperature and overpower

APPLICABILITY AT trip,s, represents the 100% RTP value as measured
  1. for each loop. This nomalizes each loop's AT trips to the actual operating conditions existing at the time of measurement, thus forcing the trip to reflect

' the equivalent full power conditions ns assumed in the accident analyses. These differences in RCS loop AT c n be due to several factors, e.g., difference in RCS loop flows and slightly asymmetric power distributions between quadrants. While RCS loop flows are not

expected to change with cycle life, radial power redirtribution between quadrants may occur, resulting in small changes in loop specific AT values.

Therefore, loop specific AT, values are measured as

' needed to ensure they represent actual core conditions.

r '

~ The LCO requires four channels of the Over>ower AT

/N5/N trip Function to be OPERABLE.\ Note that tie Overpower AT trip Function receives input frna channels shared Failures that affect d/M with other RTS Functions.

multiple Functions require entry into the Conditions applicable to all affected Functions.

In M00E 1 or 2, the Overpower AT trip Function must be OPERABLE. These are the only times that enough heat is generated in the fuel to be concerned about the heat generation rates and overheating of the fuel. In MODE 3, 4, 5, or 6 this trip Function does not have to be OPERABLE because the reactor is not operating i

' and there is insufficient heat productica to be concerned about fuel overheating and fuel damage.

8. Pressurizer Pressure

)

The same sensors (PI-0455A, 8. & C. PI-0456 PI-0456A, l

PI-0457. PI-0457A, PI-0458 PI-0458A) provide input to the Pressurizer Pressure - High and - Low trips and

" the Overtemperature AT trip. Since the Pressurizer Pressure channels are also used to provide input to 1

the Pressurizer Pressure Control System, the actuation logic must be able to withstand an input failure to (continued) 8 3.3-18 Revision No. 0 Vogtle Units 1 and 2

INSERT FOR IIASES PAGE 113.318 The values for K 4, K ,3 K ,6 and T" may be treated as nominal values for the purpose of perfonning a CilANNEL CAllllRATION. The dircetion of conservatism for these values is as follows:

K 4 s identified Value K32 Identified Value K6hidentified Value T" sidentified Value Note that for K in 5

the case of decreasing temperature, the gain setting must be > 0 to prevent generating setpoint margin on decreasing temperature rates. Similarly, the setting for K 6is required to be equal to O for conditions where T s T". The value for T" is a key reference parameter corresponding directly to plant safety analyses initial conditions assumptions for the Overpower AT Function. The as left settings for these parameters should be as close as possible or conservative with respect to the identified values. In order to ensure that the Overpower AT setpoint is consistent with the assumptions of the safety analyses, it is necessary to verify during the Cil ANNEL OPERATIONAL TEST, that the Overpower AT setpoint is within the appropriate calibration tolerances for conditions where the temperature input is equal to T", and that the appropriate penalties are generated to reduce the setpoint for a temperature input greater than T" (Ref. 9).

  • ESFAS Instrumentaticn 1 8 3.3.2 BASES BACKGROUND Seouencer Outout Relavs (continued) sequencer and are part of the control circuitry of these ESF loads. There are two independent trains of sequencers and each is powered by the respective train of 120-Vac ESF electrical power supply. The power supply for the output relays is the secuencer power supply. The applicable output relays are testec and in the slavewith in particular, in conjunction relay testing the procedures, specific slave re lay also required to actuate to energize the applicable ESF load. l l

APPLICABLE Each of the analyzed accidents can be detected by one or SAFETY ANALYSES, more ESFAS Functions. One of the ESFAS Functions is the LCO, AND primary actuation signal for that accident. An ESFAS APPLICABILITY Function may be the primary actuation signal for more than one type of accident. An ESFAS Function may also be a secondary, or backup, actuation signal for one or more other accidents. For example Pressurizer Pressure - Low is a rimaryactuationsignalforsmalllossofcoolantaccidents g7Ag Mfhp[7f/p LOCAs) and a backup actuation signal for steam line breaks ,

/ SLBs) outside containment. Functions such as manual

$~ g / p v/4 [ G /h p 4 nitiation, not specifically credited in the accident safety

. ' I analysis, are qualitatively credited in the safety analysis .

j p[ kd/t f.J.2-/ and the NRC staff approved licensing basis for the unit.

These Functions may provide protection for conditions that

/3 No/I'//e,tT A,jj( do not require dynamic transient analysis to demonstrate Function performance. These Functions may also serve as

/\/,/t h f 4 // w J l backups to Functions that were credited in the accidene analysis (Ref. 3).

kl ffit N}0ieb f r The LCO requires all instrumentation performing an ESFAS f /4g $g[jyort.- Function to be OPERABLE. Failure of any instrument renders JL the affected channel (s) inoperable and reduces the d34.54tV4///l TN#I reliabilityoftheaffectedFunctions.J Nf UW/4/! !W' The LC0 generally requires OPERABILITY of four or three

$ f @ ggr yg/j,g, channels in each instrumentation function and two channels in each logic and manual initiation function. The C///CC//f4 /J two-out-of-three and the two-out-of-four configurations gg/gf//,5 $ u allow one channel to be tripped during maintenance or testing without causing an ESFAS initiation. If an

/ '

instrument channel is equipped with installed bypass M t d//tC//f4 capability, such .that no jumpers or lifted leads are g g j4f // -

ap y It w 4 Me jf// N d h d f d W6 9 (continued)

Vogtle Units 1 and 2 8 3.3-66 Revision No. 0

RTS Instrumentation

. B 3.3.1 BASES REFERENCES 2. FSAR, Chapter 6.

(continued)

3. FSAR, Chapter 15.
4. IEEE-279-1971.
5. 10 CFR 50.49.
6. WCAP-11269, Westinghouse Setpoint Methodology for Protection Systems.
7. WCAP-10271-P-A, Supplement 2, Rev. 1. June 1990.
8. FSAR, Chapter 16.

4 (Ales llnabDuri h#er GP-16696. NoendwS, in2 a '

t Vogtle Units 1 and 2 B 3.3-60 Revision No. 0

1 ESFAS Instrumentation B 3.3.2 i BASES SURVEILLANCE SR 3.3.2.8 (continued)

REQUIREMENTS verification of these devices every 18 months. The 18 month Frequency is consistent with the typical refueling cycle and is based on unit operating experience, which shows that random failures of instrumentation components causing serious response time degradation, but not channel failure, are infrequent occurrences.

This SR is modified by a Note that clarifies that the turbine driven AFW pus) is tested within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after reaching 900 psig in tie SGs.

1 3.3.2.9 SR i SR 3.3.2.9 is the perfomance of a TADOT as described in SR 3.3.2.6 for the P-4 Reactor Trip Interlock, and the l

Frequency is once per 18 months. This Frequency is based on operating experience. The SR is modified by a note that excludes verification of setpoints during the TADOT. The function tested has no associated setpoint.

REFERENCES 1. FSAR, Chapter 6.

2. FSAR, Chapter 7.
3. FSAR, Chapter 15,
4. IEEE-279-1971.
5. 10 CFR 50.49.
6. WCAP-11269. Westinghouse Setpoint Methodology for .

Protection Systems.

7. WCAP-10271-P-A, Supplement 2, Rev. 1. June 1990.
8. FSAR, Chapter 16,
9. Wish/towsc f.t//W M- IC&K AldmberS Mf2 '

V B 3.3-109 Revision No. O Vogtle Units:1 and 2

RTS Instrumentation 3.3.1 9

isble 3.3.1 1 (pese 1 of 8)

Reacter irlp System Instroentation Futtil0N APeticaaLE N ets REeulRE0 coNolitous suaVEILLANCE ALLOW 8LE WoNINAL l  ;

~

REGUltENENTS VALUE TRIP SfiPolNT W OR OTNEa CNANNELS SPECIFIED l CONelitous i

1,2 SR 3.3.1.13 NA NA

1. Manuel Reactor 2 8 l

Trip 3I '), A I *), $ *)

I 2 c SR 3.3.1.13 NA hA

2. Power R Neutron f wa Nigh 1,2 4 0 SR 3.3.1.1 s 111.3% RTP 109% RTP l a.

De 3.3.1.2  !

la 3.3.1.7 sa 3.3.1.11

' SR 3.3.1.15

b. Low 1(b) 2, 4 E sa 3.3.1.1 s 27.3% RTP 25% RTP l sa 3.3.1.8 .

Sa 3.3.1.11 sa 3.3.1.15 l l

3. Power Renes 1,2 4 E SR 3.3.1.7 s 6.3% RTP 5% RTP l t.ith time 1

1 Neutron Flum Nlsh SR 3.3.1.11 Ntth time Peeltive Rete cinstant constant t 2 see t 2 sec

4. Intermodlate Renee 1(b), II *I 2 FG SR 3.3.1.1 s 31.1% RTP 25% RTP l ,

i- Neutron Flum- sa 3.3.1.8 .

Sa 3.3.1.11 2(d) 2 N SR 3.3.1.1 s 31.11 RTP 25% RTP l

' SR 3.3.1.8 sa 3.3.1.11 (contlnued)

(a) With Reactor Trlp Brookers (RTBs) closed and Rod Control System capable of rod ulthdrawal, (b) Detow the P 10 (Power Renee Neutron Flual interlocks.

s (c)' Above the P-6 (Intermediate Renee Neutron Flus) Interlocks. ,

(d) Delow the P 6 (Intermodlate Renee Neutron Flua) Interlocks.

(n) . The Trip letpelnte may be set more conservative then the nominst value es necessary in response to plant cendttione.

i Vogtle Uatts l'and 2- 3.3-14 Amendment No. (Unit 1)

Amendment No. (Unit 2) t

,, . . . . . . - _ _ _ . _ , _ . _ - - . . - - . . . - ._ m._.- . . _ _ . - .- . , - . - . .._.__.:__ . - _ . ,_.a.-

RTS Instrumentation 3.3.1 l

l table 3.3.1 1 (pe,)e 2 of 8) i Reactor Trip System Instrumentation -

l FWWCTION APPLICABLE NODES REOJIRED - CONDilloul SURVtlLLANCE ALLOWABLE WOMINAL l OR diner CHANNELS REQUIV MENTS VALUE TRIP SPfCIFIED StiPolNT Ud l CouDI1lowl

5. Source Renee 2(d) 2 1.J SR 3.3.1.1 s 1.4 t$ 1.0 El cps l Woutron flun $R 3.3.1.8 cpe SR 3.3.1.11 st 3.3.1.15 3I '), 4(a), $(a) 2 J,K SR 3.3.1.1 s 1.4 15 1.0 E5 eps l

$R 3.3.1.7 cpe

$R 3.3.1.11 SR 3.3.1.15 3('), 4), 5(') 1 L SR 3.3.1.1 NA NA SR 3.3.1.11

6. Overte p reture AT 1,2 4 t tR 3.3.1.1 Refer to Refer to le 3.3.1.3 Note 1 Note 1 (Page la 3.3.1.6 (Pape 3.3 20) sa 3.3.1.7 3.3 20)

SR 3.3.1.10 SR 3.3.1.15

7. Overpower AT 1,2 4 t $R 3.3.1.1 Refer to Refer to SR 3.3.1.7 Note 2 Note 2 (Page

, SR 3.3.1.10 (Page 3.3 21)

SR 3.3.1.15 3.3 21)

(continued)

(a) With RTBs closed and Rod Control System capable of rod withdrawal.

(d) Below the P 6 (Intermedlete Renee Neutron Flum) interlocks.

(e) With the Rits open. In this condition, source ranee F metion does not provide reactor trip but does provide input to the Niyh Flux et shutdown Alarm System (LC0 3.3.8) and indication.

(n) The Trip Setpoints may be set more conservative than the nominal value as necessary in resposite to plant l l

~

conditions.

Vogtle Units 1 and 2 3.3-15 Amendment No. (Unit 1)

Amendment No. (Unit 2)

, . . , . . . . . . , n ..n-~ .-,.n,- - . - - - , . . . . - - - - . , - . . . . .

RTS Instrumentation 3.3.1 Table 3.3.1+1 (page 3 of 8) teactor Trip $rstem Instrunentation FUNC110N APPLICA8LE MODES ttouintD CON 011. t 1 $URVtlLLANct ALLOWABLE WOMINAL l

REQUlttMEWil VALUE TRIP On OlNER CHANNELS

$tfP0lWT W

$PECIFIED l CON 0lil0NS

8. Pressuriser Pressure
e. Low 1(I) 4 M SR 3.3.1.1 t 1950 psig 1960%' l SR 3.3.1.7 psig SR 3.3.1.10 SR 3.3.1.15
b. High 1,2 4 E sn 3.3.1.1 s 2395 psig 2385 psig l SR 3.3.1.7 SR 3.3.1.10 SR 3.3.1.15
9. Pressuriser Water IIII 3 M SR 3.3.1.1 SR 3.3.1.7 s 93.9% 92% l Level = Hlsh sa 3.3.1.10
10. Reactor Coolant flow -Low
a. Single Loop IIh3 3 per N SR 3.3.1.1 t 89.4% 90% l toop SR 3.3.1.7

$t 3.3.1.10

$2 3.3.1.15

b. Two Loopa 1(II 3 per M st 3.3.1.1 t 89.4% 90% l l cop SR 3.3.1.7 tt 3.3.1.10 i st 3.3.1.15 1

(continued)

(f) Above the P 7 (Low Power Reactor irlps Block) inttrlock.

(g) time constante utilised in the lead leg controller for Pressuriter Pressure Low are ' ands for lead and 1 second for lag.

(h) Above the P 8 (Power Range Neutron flum) interlock.

(I) Above the P 7 (Low Power teactor Tripe Block) Interit.ck and below the P 8 (Power Range Neutron Flux) Interlock.

(n) The trip Setpoints may be set more conservative than the nominal value as necessary in response to plant conditions.

Vogtle Units 1 and 2 3.3-16 Amendment No. (Unit 1)

Amendment No. (Unit 2)

l I

i RTS Instrumentation 3.3.1 febte 3.3.1 1 (pope 4 of 8) teactor Trip System Instenanntation i

l APPLICA4LE 11388 kleulRED ConDIllows SURVEILLAmCC ALLOWASLE NON!hAL l FUNC180M OR Otuta CNAmetLS- REGUIREMENTS VALUE TRIP H l SPEtifitt OffPOINT l

' Couplilout

11. Undervettees- III) 2 per M SR 3.3.1.9 a 9481 Y 9600 V l '

RCPs bus - st 3.3.1.10 '

SR 3.3.1.15

12. Underfrequency 1(f) 2 per M ta 3.3.1.9 t 57.1 N 57.3 Na l j BCPs bue sa 3.3.1.10 -

SR 3.3.1.15

13. Steen 1,2 4 per to t sa 3.3.1.1 2 35.9K -37.8% l Generator (SG) SR 3.3.1.7 '

Weter Level - Low te 3.3.1.10 Low $4 3.3.1.15

-(continued)

(f) . Above the P.T (Low Power Reactor felps Block) Interlock.

(n) The Trip tetpoints may be set more conservettve then the nominal .value as necessary in response to plant l conditions. I i

1 1

Y t

3-Vogtle Units 1 end 2 3.3 Amendment No. (Unit 1)

Amendment No. (Unit 2)

.: = _:-_-- ,-

RTS Instrumentation 3.3.1 table 3.3.1 1 (pase 5 of 8)

Reactor irlp system Instrumentation FUNCilow APPLICAttt le0 des Atoultto CouDiflows SURVilLLANCE ALLOW 48LE WOMihAL l OR Othf R CHAWW(LS Rt0VIREMENTS VALUE TRIP W

$PitiffED SETP0 INT l

Couplilows

14. Turbine trip
a. Low fluid olt 1(II 3 0 SR 3.3.1.10 t 500 pels 580 psip l Pressure SR 3.3.1.16
b. Turbine Stop IIII 4 P st 3.3.1.10 t 90% open 96.7% open l Valwe Ciosure SR 3.3.1.14
15. Safety 1,2 2 tralne e SR 3.3.1.13 NA NA Injectlen($1)

Ityut from Engineered Safety f eature Actuation System (ESFAS)

16. Reector trip System Interlocks
a. Intermodlate 2(d) 2 R sa 3.3.1.11 t 6t 11 anp it 10 amp l Renee neutron $t 3.3.1.12 flun, P 6
b. Low Power 1 1 per s SR 3.3.1.5 h4 NA Reactor trips train Olet t, P T
c. Power tense 4 s sp 3.3.1.11 s 50.3% RTP 48% RTP l j

heutron Ftum, st 3.3.1.12 P8

d. Power Renee 4 5 SR 3.3.1.11 s 52.3% RTP 50% RTP l Neutron ftun, 1 SR 3.3.1.12 P9
e. Power Range 4 R SR 3.3.1.11 (1,m) (t,m)

Neutron Flux, 1,2 SR 3.3.1.12 P*10 and input to P*T 2 $ SR 3.3.1.10 s 12.3% 10% l

f. Turbine lopulse 1 st 3.3.1.12 Impulse lopulse Pressure, P 13 Pressure Pressure Equivalent Equivalent turbine turbine (continued)

(d) Below the P 6 (Intermediate Renee heutron flux) Interlocks.

(j) Above the P 9 (Power Renee Neutron Flux) Interlock.

(L) For the P 10 tryut to P 7, the Alloweble VeLue is 512.3% RTP and the Nominal fl ip $etpoint is 10% RTP. l

' (m) For the Power Ranee heutron Flus, P 10, the Allowable Value is t 7.7% RTP and the Nominal Trip Setpoint is 10% RTP.

(n) The Trip setpoints may be set more conservative than the nombat value as recessary in response to plant conditions.

Vogtle Units 1 and 2- 3.3-18 Amendment No. (Unit 1)

Amendment No. (Unit 2)

E w .-,y -- -ws- - -, . -

y -- ,

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

0 RTS Instrumentation 3.3.1 table 3.3.1 1 (pape 6 of 8)

Reactor trip System Instrsmentation FUNCil0N APPLICABLE MONS REQUIRED ConDiflous tuRVIILLANCE ALLOWABLE NOMihAL l Rt0UltiMEN15 VALUE 1 RIP OR OTHER CHANNELS MTP0lNT W

9PECIFit0 l Couplil0ml

17. . keector gp 1,2 2 trains 7,V tR 3.3.1.4 WA hA Dreakers 3I 'I, 4I '), $I *) 2 trains C $R 3.3.1.4 h4 hA
18. Reector trip 1,2 1 each U,Y st 3.3.1.4 NA h4 Brooker per Rip undervoltese and o u t Trip 3(a),4(e),$(s) 1 each C st 3.3.1.4 NA h4 Itechenless per RTS 19 Autenstle Trip 1,2 2 tralne 0,Y SR 3 3.1.$ NA NA Leelt 3I 'I, 4(e), $I *I 2 trains C SR 3.3.1.5 WA NA GB (4) With Rits closed and Rod Control System capable of rod withdrawal.

(6) including any reactor trip bypass breakers that are rocked in and closed for bypassing en RTI.

(e) the trip letpoints may be set more conservative then ths noelnel value es necessary in response to plant l conditione, i Vogtle Units 1 and 2 3.3-19 Amendment No. (Unit 1)

Amendment No. (Unit 2)

+

RTS Instrument 8 tion 3.3.1 ,

febte 3.3.1 1 (pese T of 4)

Reactor Trip system instrumentetton i mate it overt- eture bette T The Overtemperature Dette f Fmetlen Allowable Value sheit not exceed the Nominst Trip letpoint defined by the l feltowIre opetten by more then 2.25% of ATP.

I I 100.#."##' J Kg -K,"o +,,'o t a + ,,o

.f'

- KaIP *PI*f t(AfD) n o + ,,w n + ,,o Where: 41 measured loop specific RCs differentlet temperature, degrees F 470 Indicated loop specific RCs differentist et RTP, degrees F lttit lead tes cogensator on sneeured dif ferential temperature 1+fge t i , fg time constante utill ed in teed les cooperm. tor for differentist temperatures e, t 8 seconde, fa a 3 seconds.

i 1+fas top compensator on measured dif forential temperature fa time constant utillied in tog ccmpeneetor for dif ferentist togerature, s 2 seconde Kg -fundamentet setpoint, 112% RTP g Kg modiffer for temperature, 2.24% RTP per degree F g 1*148 1+fte teed tes cogeneetor on dynamic temperature compensation f 4 , f, time constante utilf red in lead leg compensator for temperature compensations f4 t 28 seconde, es s 4 seconde i measured loop specific RC$ eversee temperature, degrees F 1

1+tes tog tegensator on meessred eversee temperature to time constant utilf red in leg compensator for everage temperature, = 0 seconds le trulicated loop specific RCS aversee temperature et RTP, $88.4 degrees F K3 modifier for pressure, 0.115% RTP per pels l

P measured C8 presourtser pressure, pelg P' reference pressure, 2235 pelg I

s Laplace transform verlebte, inverse seconds fg(AFD) modifier for Axlet Flum Difference (AFD):

1. for AFD between 32% and +10%, 0% RTP
2. for each X AFD is belou 32%, the trip setpoint shall be reduced by 3.25% RTP
3. for each 1 AFD.ls above +10%, the trip setpoint shall be reduced by 2.7% RTP Vogtle Units 1 and 2 3.3-20 Amendment No. (Unit 1)

Amendment No. .(Unit 2)

e RTS Instrumentation 3.3.1 febte 3.3.1 1 (page 8 of 8) keector Trip $rstem Instrumentation hote Pt Dvgicower Dette T The Overpower Dette T Fmetton ALLOWAtt! VALUE shalt not exceed the Nominst Trip Setpoint defined by the following l egantion ty eore then 2.85% of ATP.

Ifys) 1

- Ty -f 2(AIDI 100 M (1+ti s) 1 1

s K4- K, II

  • f SI Il ' V 83 1 -K e I SO II
  • Yt *I II
  • f3"I 7 8 , I *fel Whores 41 measure] toop specific tt$ differentlet temperature, degrees F AT O Indicated loop specific RCS differentlet et RTP, degrees F l'1,3 teed tog compensator on eessured dif forentist teaterature 1+tge t,13 i

time constante utill ed in lead tes ccmpensator for dif ferentist tenperatures vi t 8 seconds, e s 3 seconds i

las les conpensator on sensured dif ferentist tenperature v3 time constant utillied in tog conpensator for dif ferentlet tenperature, s 2 seconds fundamentet setpoint,109.5% RTP l K4 Kg sodifier for temperature change: 21 RTP per degree F for increasing tenperature, t 0% tiP per l degree F for decreeping tenperature

.1?L t+tye rate leg ccmpensator on dynamic tenperature conpensation ey ties constant uttllied in rete +tep conpensator for tenperature conpensation, t 10 seconds i eensured loop specific RCS everage tenperature, degrees F 1

1+fge leg conpensator on sessured everage tenterature to time constant utilized In tag ccmpensator for everage toeperature, O socords Ke sodifier for temperature: 0.20% RTP per degree F foi i e 18, = 0% RTP for i s 18 l 18 indicated loop specific kCS everage teaterature et RTP, $88.6 degrees F l s Laplete transfore verlebte, inverse seconds i g(AFD) modifier for Aalel flux Difference (AFD), s 0% RTP for ett AFD Vogtle Units 1 and 2 3.3-21 Amendment No. (Unit 1)

Amendment No. (Unit 2)

ESFAS Instrumentation 3.3.2 febte 3.3.2 1 (page 1 of 7)

Engineered Safety feature Actuetten System Instrumentation -

PUNCil0N APPLICANT ateUlst0 Coupl110Nt tuRVilLLANCE ALLOWASLE IKallhAL - l INDES OR CHANNELS REGUlstelttil VALUE TalP SETPOINI N

01sta l BPEClfit0 CouDIT10N3

1. Safety injectlen
e. 16ernmL initletten 1,2,3,4 2 e la 3.3.2.6 NA NA
b. Automatic 1,2,3,4 2 C sa 3.3.2.2 NA NA Actuntlen logic sa 3.3.2.3-and Actuation M 3.3.2.5 Relays
c. Centelreent 1,2,3  !! O ta 3.3.2.1 s 4.4 pels 3.8 pois l Pressure - Nigh 1 ta 3.3.2.4 la 3.3.2.7 -

sa 3.3.2.8

~ d. Prosaurlier 1,2,3(*) 4 0 la 3.3.2.1 t 1856 pels 1870 pois l Pressure Lew Sa 3.3.2.4 la 3.3.2.7 sa 3.3.2.8 e, steen Line 1,2,3(a) 3 per 0 SR 3.3.2.1 1 570(b) $g5(b) p.g, l Pressure . Lou steen la 3.3.2.6 pets line sa 3.3.2.7 la 3.3.2.8 (continued)

(a) Above the P.11 (Prosouriser Pressure) interts.V

-(b) fles constante used in the toed /tes controller are t, t 50 seconde and t, s 5 seconk.

(l) The trip letpointe may be set more conservative then the naminal value as necessary in response to plant conditlene.

Vogtle Units'l and 2 3.3-30 Amendment ~No. (Unit 1)

Amendment No. (Unit 2)

ESFAS Instrumentation 3.3.2 I

inble 3.3.21 (page 2 of 7)

Engineered $sfety f eature Actuation System Instrumentation FUNCil0N APPLICABLE R10Ulkt0 CONDlil0NS SURVilLLANCE ALLOWABLE NOMINAL l MODES OR CHAhWELS REQUIREMthil VALUE TRIP OTHER StiPolNI N l

$PEClfl[D CONDifl0NS

2. Contalrwent Spray
e. Maruel Initiation 1,2,3,4 2 e st 3.3.2.6 NA NA
b. Automatic 1,2,3,4 2 C $t 3.3.2.2 NA NA Actuation Logic SR 3.3.2.3 and Actuation st 3.3.2.5 Relays
c. Cont eirment Pressure H i gh - 3 1,2,3 4 E $R 3.3.2.1 s 22.6 pels 21.5 psig l SR 3.3.2.4

$R 3.3.2.7 SR 3.3.2.8 (continued)

(1) The Irlp Setpointe may be set more conservative then the nominal value as necessary in response to plant l ;

i conditione. I Vogtle Units 1 and 2 3.3-31 Amendment No. (Unit 1)

Amendment No. (Unit 2)

1 ESFAS Instrumentation l 3.3.2 febte h $.2 1 (pose 3 cf 7)

Engineered Safety Feature Actuetten System instroentation ConDiflows tu VtlLLAhCE ALLOWABLE NOMihAL l <

funcitou APPLicasLE hieUIRED IRIP NODil DA CHAWWELS tieUIREMENTS VAtut OTME $tiPolNI N l l r

SPECIFitD CouDifl0bl

3. Phe6e A Centalement lootetten (a) menuel initiation 1,2,3,4 2 8 64 3.3.2.6 NA NA (b) Automatic 1,2,3,4 2 tralne C sa 3.3.2.2 NA NA Actuellen Logic la 3.3.2.3  ;

and Actuetten sa 3.3.2.5 Releye (c) Safety injection Ref er to function 1 (Safety injection) for all Initiation fum tione and requiremente.

4. Steam Line Isolation
e. Manuel Initletion 1,2I83,3I8) 2 F st 3.3.2.6 NA NA
b. Automatic 1,2I 'I 3I 'I 2 G sa 3.3.2.2 NA NA Actuellen Loste la 3.3.2.3 and Actuetten sa 3.3.2.5 Releys (continued)

(c) tacept when ore main steen lactation velve and associated bypass isolation volve per steen line is closed.

(I) The Trip Setpointo may be set more conservative then tie nominal value es necessary in response to plant conditions.

Vogtle Units 1 and 2 3.3 Amendment No. (Unit 1)

Amendment No. (Unit 2) l

i ESFAS Instrumentation  !

3.3.2 febte 3.3.2 1 (pose 4 of F)

Engitwered Safety feature Actuotton system Instrumentation >

FUNCTION APPLICABLE RfeUlktD CONDITIONS SURytlLLANCE ALLOW 48tt h0MINAL l MODil OR CNAthtLS RiOUIREMENTS VALUE TRIP SETP0lNT N

Ofutt l SPECIFIED CONDITIONS I

4. tteen Line lootetten (conttrwed)
c. ContcInsent 1,2(8) , 3 0 SR 3.3.2.1 s 15.4 pels 14.5 psig -l Pressure - Nigh 2 3gg) la 3.3.2.4 st 3.3.2.7 SR 3.3.2.8
d. steen Line Pr essure 1,2(*), 3 per $R 3.3.2.1 t 570 (b) $gg (b) l (1) Low D psig steen SR 3.3.2.4 pela 3(e)(c) IIne SR 3.3.2.T SR 3.3.2.8 100 (')  !

(2) seestive 3(d)(8) 3 per D st 3.3.2.1 s 125 (*)

Rete - NIsh ateen st 3.3.2.6 pel/see pel/see tine SR 3.3.2.7 SR 3.3.2.8 (continued)

(a) Above the P.11 (Pressurlaer Pressure) Interlock.

(b) flee constants usec in the teed /tes controlter are t, t 50 seconds and t, s 5 seconds.

(c) Encept then one main steem isolation valve end associated bypass isolation volve per steem line is closed.

(d) Below the P 11-(Pressuriter Pressure) interlock.

(e) Time constant utill ed in the rete /tes controtter is t 50 seconde.

(1) The Trip letpoints may be set more conservative then the nominst value as necessary in response to plant l conditions.

Vogt!? Units 1 and 2 3.3-33 Amendment No. (Unit 1)

Amendment No. (Unit 2)

ESFAS Instrumentation

  • 3.3.2 table 3.3.2 1 (page 5 of 7)

Engineered safety f eature Actuetten system Instrtamentation

$URVElLLANCE Alt 0WABLE NOMINAL l APPLICABLE REQUIRID CONDITIOWs

' FUNCil0N REQUIREMtWfs VALUE TRIP MODis OR CHANNELS

$[1PolWi "

i l

Ot h(R SPECif tt0 COND1110Ns

5. turbine irlp and f eedwater isoletten 1,2 III 2 tralne N st 3.3.2.2 kA WA
e. Automatic st 3.3.2.3 Actuation Logic sa 3.3.2.5 and Actuation Retore st 3.3.2.1 t 561.5 *f $64 'F l
b. Low RCS f avs 1,2(II & I

$R 3.3.2.4 st 3.3.2.7 Coincident with Refer to function 8e for ett P.4 recpirements.

Reactor trip, P.4 st 3.3.2.1 s 87.9% 86.0% l

c. 50 Water 1,2(II 4 per SG I SR 3.3.2.4 Level - Niph Nigh SR 3.3.2.7 (P.14) st 3.3.2.8
d. safety injection Refer to fmetton 1 (se.'ety injection) f or ett inittetton funetione and requiremente.
6. AuxlLlery f eedwater NA 1,2,3 2 tralne G st 3.3.2.2 NA
a. Autreat ic SR 3.3.2.3 Actuation Logic st 3.3.2.5 and Acteation Retsya st 3.3.2.1 t 35.9% 37.8% l 1,2,3 4 per SG D b, so Water $R 3.3.2.4 tevet Low Low SR 3.3.2.7 st 3.3.2.8 (continued)

(f) Estept when one MFIV or MFRV, and its associated bypass valve per feedwater line le closed and deactivated or laoleted by a closed manuel volve.

(t) The Irlp setpoints may be set more conservative than the nominal veLue se necessary in response to plant conditione.

Vogtle Units 1 and 2 3.3-34 Amendment No. (Unit 1)

Amenciment No. (Unit 2)

ESFAS Instrumentation 3.3.2 Table 3.3.2*1 (page 6 of 2)

Engineered $4fety f eature Actuation System Instrumentation FUNCil0N APPLICABLE REQUIRED CONDIT10Nl SURVEILLANCE ALL0aABLE WOMINAL l MODES OR CHAWWELS REQUIREM Wil VALUE TRIP OTHER SETPolNT'" l SPEClflED CONDITIONS

6. Aunittery Feochester (cont trued)
c. Safety injection Refer to Fmetion 1 (sofety injection) for att initiation functions and requirements.
d. Trip of att Main 1,2(8) 1 per J st 3.3.2.6 NA NA feedwater Pupps puip
2. Feel.outomatic Switchover to Contaltunent Susp
a. Autcastic 1,2,3,4(h) 2 C SR 3.3.2.2 NA NA Actuation Logic SR 3.3.2.3 and Actuation SR 3.3.2.5 meteys Refueling Water 1,2,3,4 4 K $R 3.3.2.1 t 264.9 in. 275.3 in. l b.

Storage lenk SR 3.3.2.4 (RW51) Level - Low SR 3.3.2.T Low

$R 3.3.2.8 Coincident with Refer to Function 1 (lefety injection) for all initiation safetyinjection functions and requirements.

(continued)

(g) When the Main feedwater System is operating to supply tho SCs.

(h) In Mabt 4, only 1 train is required to be OPERABLE to support semi automatic switchover for the RHR pufp that is regJired to be OPERABLE in accordance with specification 3.5.3, Eccs shutdcun.

(1) the Trip Satpoints may be set more conservative than the nominal vetue as necessary in response to plant l I

ronditions.

Vogtle Units 1 and 2 3.3-35 Amendment No. (Unit 1)

Amendment No. (Unit 2)

9 ESFAS Instrumentation f .

3.3.2 feble 3.3.2 1 (page 7 of 7)

Engineered Safety f eature Actuetton System Instrumentation fubC110N APPLICABLE tt0VittD CON 0lil043 tutVEILLANCE ALLOWABLE NOMik t. l 140 DES OR CHAhWELS RtoultfMthil VALUC itlP 01Mt StiPolki"' l

$PECiftt0 CON 0lfl0NS

8. EstAs interlocks
a. Reactor Trlp P 4 1,2,3 1 per f SR 3.3.2.9 kA NA train, 2 trains
b. Presourtser Prt$wre, 1,2,3 3 L st 3.3.2.4 s 2010 ps:s 2000 pels l Pall $t 3.3.2.7 (1) The trip Setpoints my be set more conssrvettve than the nom!nal value as necessary in re:ponse to plant l I

conditions.

Vogtle Units 1 and 2 3.3-36 Amendment No. (Unit 1)

Amendment No. (Unit 2)

RTS Instrumentation B 3.3.1 BASES BACKGROUND Reactor Trio Switchaear (continued) .

trip mechanism is sufficient by itself, thus providing a diverse trip mechanism.

The decision logic matrix Functions are described in the functional diagrams included in Reference-1. In addition to the reactor trip or ESF, these diagrams also describe the various " permissive interlocks" that are associated with unit conditions. Each train has a built in testing device that can automatically test the decision logic matrix Functions and the actuation devices while the unit is at power. When any one train is taken out of service for testing, the other train is capable of providing unit monitoring and protection until the testing has been completed. The testing device is semiautomatic to minimize testing time.

APPLICABLE The RTS functions to maintain the SLs during all A00s and -

SAFETY ANALYSES, mitigates the consequences of DBAs in all MODES in LCO, and LCO, and which the RTBs are closed.

APPLICABILITY Each of the analyzed accidents and transients can be detected by one or more RTS Functions. The accident analysis described in Reference 3 takes credit for most DTS trip Functions. RTS trip Functions not specifically credited in the accident analysis are qualitatively credited in the safety analysis and the NRC staff approved licensing basis for the unit. These RTS trip Functions may provide protection for conoittons that do not require dynamic transient analysis to demonstrate Function performance.

They may also serve as backups to RTS trip Functions that were credited in the accident analysis.

The LCO requires all instrumantation performing an RTS Function, listed in Table 3.3.1-1 in the accompanying LCO, to be OPERABLE. Failure of any instrument renders the affected channel (s) inoperable and reduces the reliability of tha affected Functions. The Nominal Trip Setpoint column is modified by a Note that allows the Trip Setpoint to be set more conservatively than the nominal value. The conservative direction is established by the direction of (continued)

Vogtle Units 1 and 2 B 3.3-7 Revision No.

4 RTS Instrumentation B 3.3.1 BASES APPLICABLE the inequality applied to the Allowable Value. For example, SAFETY ANALYSES, the Power Range Neutron Flux High trip setpoint may be set LCO, and to a value less than 109% during initial startup following a APPLICABILITY refueling outage until a sufficiently high reactor power is (continued) achieved so that the power range channels may be calibrated.

in addition, certain Required Actions may require that the Power Range Neutron Flux High trip setpnints be reduced based on plant conditions.

The LCO generally requires OPERABILITY of four or three channels in each instrumentation Fs;;ction, two channels of Manual Reactor Trip in each logic Function, and two trains in each Automatic Trip Logic Function. Four OPERABLE (continued)

Vogtle Units 1 and 2 B 3.3-7a Revision No,

. .. _ _ _ . .-_ .,_ , . ._._ .._ .. . ..__ . - - _m. . . . .

4e- ,

=#

RTS Instrumentation:

M*

B 3.3.1- ,

BASES; a

1 1

This page intentionally left blank.

3 n

4 (covitinued)

D Vogtle-Units 1 and 2; B 3.3-7b Revis',on No.

0-h

+ e - , ,- . . - - - , .- . . . , * + ,

l ..

I ,

_RTS Instrumentation B-3.3.1 BASES APPLICABLE 6. Overtemoerature AT (continued)

SAFETY ANALYSES, LCO, and This results in a two-out-of-four trip logic. Section

, APPLICABILITY 7.2.2.3 of Reference I discusses control and protection system interactions for this function. Note that this Function also provides a signal to generate a turbine runback prior to reaching the Trip Setpoint.

A turbine runback will reduce turbine power and-rea: tor power. A reduction in power will_ normally alleviate the Overtemperature AT condition and may prevent a reactor trip.

Delta-T , as used in the overtemperature and overpower AT trips, represents the 100% RTP value as measured for each loop. This normalizes each loop's AT trips to the actual operating conditions existing at the time of measurement, thus forcing the trip to reflect the equivalent full power conditions as assumed in the accident analyses. These differences in RCS loop AT can be due to several factors, e.g., differences in RCS loop flows and slightly asymmetric power distributions between quadrants. While RCS loop flows are not expected to change with cycle life, radial power redistribution between quadrants may occur, resulting in small changes in loop specific AT values.

Therefore, loop specific AT, values are measured as needed to ensure they represent actual core conditions.

The values for K i , K,, K3 , T', and P' may be treated as nominal values for the purpose of performing a CHANNEL-CALIBRATION. The direction of conservatism for these values is as follows:

K, f Identified Value K,2 Identified Value K,2 Identified Value T' s Identified-Value

- P' 2-Identified Value Note that K is the principle setpoint gain, since it 3

defines the function offset. K,. and K 3 define the temperature gain and pressure gain respectively. The values for T' and P' are key reference parameters corresponding directly to plant safety analyses (continued)

Vogtle Units-1 and 2 B 3.3-16 Revision No.

RTS Instrumentation B 3.3.1 BASES APPLICABLE 6. Overtemoerature AT (continued)

SAFETY ANALYSES, LCO, and initial conditions assumptions for the Overtemperature APPLICABILITY AT Function. The as left settings for these parameters should be as close as possible or conservative with respect to the identified values.

In order to ensure that the Overtemperature AT setpoint is consistant with the assumptions of the safety analyses, it is necessary to verify during the CHANNEL OPERATIONAL TEST, that the Overtemperature AT setpoint is within the appropriate calibration tolerances for condit:;ns where the temperature input is equal to T' and the pressure input is equal to P',

and that appropriate penalties are generated to reduce I

r the setpoint for a temperature input greater than T',

l and again for a pressure input less than P' (Ref. 9).

The LCO requires all four channels of the Overtemperature AT trip Function to be OPERABLE. Note that the Overtemperature AT Function receives input from channels shared with other RTS Functions.

l Failures that affect multiple Functions requira entry l

l l

L (continued)

Vogtle Units 1 and.2 B 3.3-16a Revision No.

RTS Instrumentation B 3.3.1 BASES APPLICABLE 6. Overtemoerature AT -(continued)-

SAFETY ANALYSES.-

- LCO, and .

into the Conditions applicable to all affected APPLICABILITY Functions.

In MODE 1 or 2, the Overtemperature AT trip must be .

OPERABLE to prevent DNB. In MODE 3, 4, 5, or 6, this trip Function ~does not have to be OPERABLE because the reactor is not operating and there is insufficient heat production to be concerned about DNB.  ;

4 (continued)

Vogtle Units 1 and 2- B 3.3-16b Revision No.

RTS. Instrumentation j B 3.3.11 ,

' BASES-APPLICABLE . 7. Overnower AT ,

- SAFETY ANALYSES,.

, LCO, and- The Overpower AT trip Function (TDI-0411B,.TDI-04218, APPLICABILITY = TDI-04318. TDI-0441B, TDI-0411A, TDI-0421A, TDI-0431A . 1

' (continued) TDI-0441A) ensures that protection is provided to ensure the integrity of the fuel-(i.e., no fuel pellet melting and .less than 1% cladding strainL under'all possible overpower. conditions. This trip Function also limits the required range.'of the Overtemperature -

AT trip Function and provides a backup to the Power.

  • Range Neutron Flux - High Setpoint trip. The Overpower

-AT trip Function ensures that the allowable heat generation rate (kW/ft) of the fuel is' not exceeded. '

it uses the AT of.each loop-as a measure of reactor power with a setpoint that is automatically varied

. with the following parameters:

  • -reactor coolant average temperature - the Trip Setpoir.t is varied to correct for changes in coolant density and specific heat capacity with 1

changes-in coolant temperature; and

- temperature -including dynamic compensation for RTD response time delays.

The Overpower AT trip Function is calculated for each loop as per Note 2 of Table 3.3.1-1.- Trip occurs if -

Overpower AT is indicated in two loops. Since the temperature signals are used for other control functions, the actuation logic must be able to withstand an input failure to the control system, which may then require the protection function actuation and a single failure in the remaining channels providing the protection function actuation.

This results in a-two-out-of-four trip logic. Section.

7.2.2.3 of Reference 1 discusses control and

- protection' system interactions for this function.

Note that this Function also provides a signal to-

- generate a turbine-runback prior to reaching the Allowable Value. A turbine runback will-reduce turbine power and reactor power. A-reduction in_ power

'wil1 normally alleviate the Overpower AT condition:and

. may prevent a reactor trip.

(continued) ,

Vogtle Units 1 and 2 B 3.3-17 Revision No. O.

' u--*- - e*= -- ---t- --p "vf

RTS Instrumentatien B 3.3.1 BASES APPLICABLE 7. Overoower AT (continued)

SAFETY ANALYSES, LCO, and Delta-T., as used in the overtemperature and overpower APPLICABILITY AT trips, represents the 100% RTP value as measured for each loop. This normalizes each loop's AT trips to the actual operating conditions existing at the time of measurement, thus forcing the trip to reflect the equivalent full power conditions as assumed in the accident analyses. These differences in RCS loop AT can be due to several factors, e.g., difference in RCS loop flows and slightly asymmetric power distributions between quadrants. While RCS loop flows are not expected to change with cycle life, radial power redistribution between quadrants may occur, resulting in small changes in loop specific AT values.

Therefore, loop specific AT values are measured as needed to ensure they represent actual core conditions.

The values for K., K., K., and T" may be treated as nominal values for the purpose of performing a CHANNEL CAllBRATION. The direction of conservatism for these values is as follows:

K, s Identified Value K.1 Identified Value K.1 identified Value T" s Identified Value Note that for K, in the case of decreasing temperature, the gain setting must be 2 0 to prevent generating setpoint margin on decreasing temperature rates.

Similarly, the setting for K, is required to be equal to 0 for conditions where T s T". The value for T" is a key reference parameter corresponding directly to plant safety analyses initial conditions assumptions for the Overpower AT Function. The as left settings for these parameters should be as close as possible or conservative with respect to the identified values, in order to ensure that the Overpower AT setpoint is consistent with the assumptions of the safety analyses, it is necessary to verify during the CHANNEL OPERATIONAL TEST, that the Overpower AT setpoint is within the appropriate calibration tolerances for conditions where the temperature input is equal to T",

and that the appropriate penalties are generated to (continued)

Vogtle Units 1 and 2 B 3.3-18 Revision No.

RTS Instrumentation B 3.3.1 I

BASES APPLICABLE 7. Overoower AT (continued)

SAFETY ANALYSES, LCO, and reduce the cet;>oint for a temperature input greater APPLICABILITY than T" (Ref. 9).

The LC0 requires four channels of the Overpower AT trip Function to be OPERABLE. Note that the Overpower AT trip . i .. tion receives input from channels shared with other RTS Functions. Failures that affect multiple Functions require entry into the Conditions applicable to all affected Functions.

In MODE 1 or 2, the Overpower AT trip Function must be OPERABLE. These are the only times that enough heat is generated in the fuel to be concerned about the heat generation rates and overheating of the fuel. In MODE 3, 4, 5, or 6, this trip Function does not have to be OPERABLE because the reactor is not operating and there is insufficient heat production to be concerned about fuel overheating and fuel damage.

8. Pressurizer Pressure The same sensors (PI-0455A, B, & C, PI-0456, PI-0456A, PI-0457, PI-0457A, PI-0458, PI-0458A) provide input to the Pressurizer Pressure - High and - Low trips and the Overtemperature AT trip. Since the Pressurizer Pressure channels are also used to provide input to the Pressurizer Pressure Control System, the actuation logic must be able to withstand an input failure to (continued)

Vogtle Units 1 and 2 B 3.3-18a Revision No.

I RTS Instrumentation:

'-. B 3.3.1:1 i l

r BASES-t

. (This page intentionally left blank.)

1 i

i E.

i (continued) ._

Vogtle' Units 1 and 2 B 3.3-18b- Revision No.

4 a - , - ~ - - __ ________.

__________m ____._____________.____._.___.________1____m. . _ . _ _ _ _ _ . _ _ . _ _ _ _ _ _ _ _ . _ _ _

4 RTS Instrumentation B 3.3.1 BASES REFERENCES 2. FSAR, Chapter 6.

(continued) 3.- .FSAR, Chapter 15.

4. IEEE-279-1971.
5. 10 CFR 50.49.
6. WCAP-ll269, Westinghouse Setpoint Methodology for -

Protection Systems.

7. -WCAP-10271-P-A, Supplement 2, Rev. 1, June 1990.
8. FSAR, Chapter 16.
9. Westinghouse Letter GP-16696, November 5, 1997. l t

l i

I.

I l

L i- ~

.Vogtle Units .1 and 2 - B 3.3-60 Revision No.

l + - - . - - - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

O ESFAS Instrumentation B 3.3.2 BASES BACKGROUND Seauencer Output Relty.1 (continued) sequencer and are part of the control circuitry of these ESF loads. There are two independent trains of sequencers and each is powered by the respective train of 120-Vac ESF electrical )ower supply. The power supply fo the output relays is tie secuencer power supply. The applicable output relays are testec in the slave relay testing procedures, and in particular, in conjunction with the specific slave relay also required to actuate to energize the applicable ESF load.

APPLICABLE Each of the analyzed accidents can be detected by one or SAFETY ANALYSES, more ESFAS Functions. One of the ESFAS Functions is the LCO, AND primary actuation signal for that accident. An ESFAS APPLICABILITY Function may be the primary actuation signal for more than one type of accident. An ESFAS Function may also be a secondary, or backup, actuation signal for one or more other accidents. For example, Pressurizer Pressure - Low is a primary actuation signal for small loss of coolant accidents (LOCAs) and a backup actuation signal for steam line breaks (SLBs) outside containment. Functions such as manual iaitiation, not specifically credited in the accident safety analysis, are qualitatively credited in the safety analysis and the NRC staff approved licensing basis for the unit.

These Functions may provide protection for conditions that do not require dynamic transient analysis to demonstrate Function performance. These Functions may also serve as backups to functions that were credited in the accident analysis (Ref. 3).

The LCO requires all instrumentation performing an ESFAS Function to be OPERABLE. Failure of any instrument renders the affected channel (s) inoperable and reduces the reliability of the affected Functions. The Nominal Trip Setpoint column of Table 3.3.2-1 is modified by a note that allows the Trip Setpoints to be set more conservatively than the nominal value. The conservative direction is established by the direction of the inequality applied to the Allowable Value.

(continued)

Vogtle Units 1 and 2 B 3.3-66 Revision No.

o o

ESFAS Instrumentation B 3.3.2 BASES

' APPLICABLE The LCO generally requires OPERABILITY of four or three SAFETY ANALYSIS, channels in each instrumentation function and two channels LCO, AND in each logic and manual initiation function. - The APPLICABILITY two-out-of-three and the two-out-of-four configurations (continued) allow one channel.to be tripped durir>g maintenance or testing without causing an ESFAS initiation. If :n-instrument channel is equipped with installed bypass capability, such that no jumpers or lifted leads are (continued)

Vogtle Units 1 and 2- B 3.3-66a Revision No.

m. _ _ . . - - , ,
-. i#' ESFAS Instrumentation B 3.3.2 BASES-i 4

4 4

(This page intentionally left blank.)

e.

t 5

m F

t (continued)

Vogtle Units 1.and 2: B 3.3-66b . Revision No.

t ,

t v -c v- . .,--+e -w--.. --. ,- - , - - - - , - . -

  • ESFAS Instrumentation B 3.3.2 l

BASES SURVEILLANCE SR 3.3.2.8 (continued)

REQUIREMENTS verification of these devices every 18 months. The 18 month Frequency is consistent with the typical refueling cycle and is based on unit operating experience, which shows that random failures of instrumentation components causing serious response time degradation, but not channel failure, are infrequent occurrences.

This SR is modified by a Note that clarifies that the turbine driven AFW pum) is tested within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after reaching 900 psig in tie SGs.

SR 3.3.2.9 SR 3.3.2.9 is the performance of a TAD 0T as described in SR 3.3.2.6 for the P-4 Reactor Trip Interlock, and the Frequency is once per 18 months. This Frequency is based on operating experience. The SR is modified by a note that {

excludes verification of setpoints during the TA00T. The function tested has no associated setpoint.  ;

REFERENCES 1. FSAR, Chapter 6.

2. FSAR, Chapter 7.
3. FSAR, Chapter 15.
4. IEEE-279-1971.
5. 10 CFR 50.49.
6. WCAP-ll269, Westinghouse Setpoint Methodology for Protection Systems.
7. WCAP-10271-P-A, Supplement 2, Rev.1, June 1990.
8. FSAS, Chapter 16.
9. Westinghouse Letter GP-16696, November 5, 1997. l Vogtle Units 1 and 2 B 3.3-109 Revision No.

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