ML18086B514

Control Sys Failures Analysis.

ML18086B514
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Site:	Salem
Issue date:	05/31/1982
From:	Public Service Enterprise Group
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NUDOCS 8206090042
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CONTROL SYSTEMS FAILURES ANALYSIS SALEM GENERATING STATION 8206090042 8 f~-' -

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. MAY 1982 "he Energy Peop~e SALEM GENERATING STATION UNIT. 2 CONTROL SYSTEMS FAILURES ANALYSIS

CONTROL SYSTEMS FAILURES The purpose of this document is to provide an analysis demonstrating that the postulated events in Chapter 14 of the Salem FSAR adequately bound the consequences of single control system failures.

The following analysis consists of postulated failures of major ~SSS con-trol systems and system interrelationships.

The systems reviewed were:

1. Steam Dump.

2. Excore Nuclear Instrumentation.

3. Pressurizer Pressure and Level Control.

4. Feedwater Control.

5. Rod Control.

The systems were evaluated for:

1. Break of common instrument lines.

2. Loss of power to all components powered from a single source, and *

3. Break of any single instrument line.

The enclosed Tables analyze these systems in the following manner:

Table #1 - Break of Instrument Lines This table is comprised of an instrument by instrument analysis evaluating the effect of the individually failed instrument line upon its related con-trol system. The analysis is formulated to incorporate the instrument and channel, its failure mode, the effects of failures (upon all related sys-tems), available redundant functions, the bounding event contained in the FSAR and any necessary remarks.

Table #2 - Break of Common Instrument Lines Within Table #2, the analysis examines the NSSS control system instruments common to the same instrument line. These instruments are evaluated to the same criteria as in Table #1. However, in Table #2, the evaluated analysis encompasses the effects of all instruments common to the related instrument 1i ne.

Table #3 - Failure of Excore Nuclear Instrumentation Table #3 evaluates control system failures in regard to Nuclear Instrumenta-tion only. As in Tables #1, and #2, the Nuclear Instrumentation System is also evaluated to demonstrate that the postulated failure is bounded by the events in Chapter 14 of the FSAR.

Table #4 - Loss of Power Sources Table #4 is an individual analysis of all vital instrument buses affecting each instrument previously analyzed. It is an evaluation of the implied failure resulting from the loss of a particular instrument bus.

Also contained within Table #4, is information inherent to the cumulative affects ensuing from the postulated total loss of a single vital instrument bus. Based upon this information, it is concluded that the postulated failures are bounded by the analyses contained within Chapter 14 of the FSAR.

All aforementioned Tables refer to Appendix A of this analysis. Appendix A depicts all related control system instruments, related power sources, con-trol functions, and process taps for the systems reviewed.

It is concluded that these proposed failures are bounded by the postulated events in Chapter 14 of the Salem FSAR.

I I

I I

CONTROL SYSTEMS FAILURES ANALYSIS - TABLE #1

COITTRO!Jl SYSTF.M Fl\IlJIRES Tl\BJ.E I 1 - BRP..AK OF lNS'l'RlJMEl'l'r LINES SYSTEM: PRffiSURIZER PRESSURE AND LEVEL CXNI'ROL SHEF.'1' 1 FAIWRE INSTJllMENl'S IOJffi EFFttl'S OF FAIWRffi AVAILABLE REOONDANI' fUNCTirn5 Cllannels PT-455 Qi I . low -Palse initiation of: -<llannel III is available as the -'Ihe event is bounded by -Redundancy used to (I) 1/4 Pressurizer low Pressure redumant control channel. the inarlvertent openinq pi:otect against Reactor Trip Signal (llbolle -<llannel III also controls Pres- of a pressurizer safety accidental depres-P7, 2/4 required for Reactor surizar Rlwer Operated Relief valve as associatP.d with sur i zat ion of. the trip). Valve PR.1. the 11.ccidental Depressur- Reactor Coolant (2) 1/4 overtemperaturaAT -<:hannel IV is available as the ization of. the Reactor System.

Reactor Trip am 1/4 redundant relief channel for PR2. OJolant System analysis.

overtemperature .6 T Auto

'l\Jrblne ~nback, blocks auto aoo manual R:Jd Withdrawl.

(3) 1/3 Pressurizer low Pressure Safety Injection Siqnal.

-If Cllannel I ls being used as the controlling channel when the postulated failure occurs, the following FAISE Signals are lilitiated:--

• False Operation of Pressurizer heaters (turns-on).

Ioss of auto operation:

(1) Pressurizer ~r Operated Relief valve PR2.

(2) Pressurizer Spray valves PSl am PS3.

-False low Pressurizer Pressurf!

Annunciation in the Main Control ltxlm. .

Pl'-456 di II low =<ilannel II operates ~r Relief =<ilannel IV Is avaUahle as the re- See PT-455, Sheet Valve PR1 am alaans only. duooant Relief channel.

-If Cllannel II is being used as -<:hannel IV also controls ~r the relief channel when the pos- Operated Relief Yalve PR2.

tulated failure occurs, then the -<flannels I or 111 are available as following FAISE Signals are reilu00ant control chanools.

initiated:--

• cc.ll'ROLS SYS'l'F.M FAIUJRES TABLE 11 - BRFJ\K OF INSTRUMF.N'r LINES SYSTIM: PRF..SSURIZER PRESSURE AND LEVEL CCNl'ROL SHEET 2 FAIWRE INSl'RUMEm'S IOJES EFFEX:TS OF FAIWRES . AVAILABLE REOONDANl' FUOCTIOOS Rml\RKS anne s Pl'-456 -False Initiation of:

. (Cont'd) (11 1/4 Pressurizer IDw Pressure Reactor Trip Signal (above P7, 2/4 required to trip the reactor).

(2) 1/4 overtentierature..QT Reactor Trip and 1/4 overtemperature

.OT Auto 'l\Jrbine Runback, blocks auto and manual ltJd Withdrawal.

(3) 1/3 Pressurizer IDw Pressure safety Injection Signal.

toss of operation for Pressurizer i:u..er (llerated Relief Valve PR1.

-False [Dw Pressurizer pressure annunciation in the Main Control R:x:m.

PT-457 01 III -False Initiation of: -<llannel I is available as the re- See PT-455, Sheet 1 -Redundancy used to (1) 1/4 Pressurizer IDw Pressure dundant control channel (except for protect against Reactor Trip Signal (Above operating PR1). accidental depres-P7, 2/ 4 required for Reactor -<:hannel II is available as a redun- suri zat ion of the trip) dant relief channe1 for operation system.

(2) 1/4 overtenperature.6T lleact- of the Pressurizer R>wer Operated or Trip and 1/4 overteqiera- Relief Valve PR1.

tureAT Auto 'l\Jrbine Runback, -<:hannel IV is available as a redun-blocks auto and manual ltJd dant relief channel for operation Withdrawal. of the Pressurizer lbwer Operated (3) 1/3 Pressurizer low Pressure Relief Valves PR1 and PR2.

safety Injection Siqnal.

-If Olannel III is being used as the controllinq channel when the postulated failure occurs, the following FAISE Siqnals are initiated:--

False initiation of operating the Pressurizer heaters (turns-<>n).

toss of auto operation:

11) Pressurizer i:u..er cp!rated Relief valve PR2. .

(2) Pressurizer Spray Valves PSI and PS3.

(3) Pressurizer i:u..er operated Relief valve PR1 *

.\

<XNJ'llOL.<; SY~ FAIUJRP.8

• TAl'LF. I I - RREAK (lf' INS'J'lll ll'r.N'I' LINF'S SYS'l>>I: PRESSURIZER PRESSURF. AtJll I.FVF.L CCffl'ROI, FAILllRE INSTRlMENI'S KJ)f!S F:FFEr.l'!l OF FAIUIRP.S Olanne s P'l'-457 -False I.ow Pressurizer pressure (Cont'd) annunciation in the Main Control R'.Joni.

- anne I opera es POwer Re e - anne Valves PR1 anit PR2 anit alarrm nur.iant Re]ief channel for Power only. l)>erater'I RP.Jief Valve Pill.

-If Oiannel IV is beillCI used as the --<hannelR I or III are availahle as relief. channel -.tien the posulate<' rer'lundant contro1 cfiannels, an<! aJRO failure occurs, then the followillCI for operation of Power Operate(!

FALSF. Siqnals are initiated: lie.lief Valve PR2.

loss of auto operation for the Pressurizer Power Q:>erated Re1ief Valves PRl and PR2.

-False initiation of 1/4 Pressurizer I.ow Pressure Reactor Trip Siqnal (llhove P7, 2/4 reau!red for React-or Trip).

-False I.ow Pressurizer pressure annunciation in the Main Control lbotn.

LT-459 di I Rlati . -False'(nlElatlon of 1/3 Pressur- -Oiannels n or Ill are availahle izer Hiah Water Level Reactor as the rrounitant crmtro1 channels.

Trip Sianal (7/3 reauirP.<'l for reactor trip).

-If Cllannel I is beillCI used as the controllillCI channel -.tien the pc>s-tulated failure.occurs, the follow-illCI FAL.'lf. Sic;mals are initiaten:

CQITTROLS SYSTEM FAIUJRES TABLE 11 - BREAK OF INSTRUMEN'r LINES SHEET 4 svsim: PRESSURIZER PRESSURE !\ND.LEVEL crnrROL REMMKS FAIWRE AVAILABLE REOONDANl' FUNCTIOOS 1-DJES EFFECI'S OF FAIWRF.S Channels False Operation of Pressurizer LT-459 Backup Heaters (turns-<>n)

(Cont'd) Charging PUmpS decrease flow.

-False High Pressurizer level an-nunciation in the Main Control lbcJn.

n essur-i zer High Water Level Reactor Trip Signal (2/3 required for reactor trip) ..

-If Olannel II is being used as the controlling channel when the postulated failure occurs, the following FALSE Signals are initiated:--

False initiation of Pressurizer Backup Heaters (tums-<>n).

Charging PUmpS decrease flow.

-False High Pressurizer level an-nunciation in the Main Control lbcJn.

-Oiannels I aM!fareaVaITab""Ie as --- see PT-4S"S-, sheet , -------------------------

111'~-__.,..0ic.-il"l"'l"---.nrrl9'"'h..---_...

Fa"'1"s°'e--.l..-n-rlt.--l""'a"'t...,l""on,,....o...,f,.......1,...,/""3,......,Pi..,.e=ssur--

the redundant control channels.

izer High Water Level Reactor Trip Signal (2/J required for reactor trip).

-If Olannel III is being used as the controlling channel when the postulated failure occurs, the following FALSE SiQnals are initiated:-- **

cn1J'ROL.'l SYSTF.M FMIJJRF.S TABLE 11 - BRf'.AK OP INS'l'RllMF.N'r LINES SYSTEM: PRESSURIZER PRESSURE l\tlll LEVP.L CONTOOL SHEF:I' 5 FAIUJRE IOJES EFFOCTS OF FAIWRES AVAilABLE RID!NDA!fl' FUNCTIOOS anne s LT-461 False Initiation of Operatinq the (Cont'd! Pressurizer Backup Heaters (turns-<>n).

Oiarqing Plmt>S decrease flow.

-False High Pressurizer level an-nunciation in the Main Control ltxlln.

LT-459 Cfl I I.ow -If Channel I ls being used as =<llannels 11 or III are available as See Pl'-455, Sheet 1 the controlllnq dlannel when the the reundant control channels.

postulated failure occurs, the following FAISE Siqnals are initiated:--

• All Pressurizer heaters in auto mode de-enerqize.

letdown isolation valves CV277 and CV2 close.

All letdown orifice isolation valves close (CV3, 4, & 51.

-False I.ow Pressurizer level an-nunciat ion in the Main Control IO:Jln.

LT-460 Ch II I.ow See LT-459, Sheet 5 =<llannels I or III are available as See PT-455, Sheet the redundant control channels.

LT-461 di III see LT=459, Sheet 5 =<llannels I or II are available as See pr::455, Sheet the redundant CO(ltrol dlannels.

PT-458 High Nile - ca116ratlon Channel LT-462 High N'Jne - calibration Channel

.:-'t*

CTNl'ROLS SYS'l'F.M FAIUJRES TABLE

• 1 - BREAK OF INS'l'RUMF.NT LINES SYSTEM: PRESSURIZER PRESSURE AND LEVEL <XNI'ROL SHEET 6 FAIWRE INSTRIJMENl'S r-l)()ES EFFECTS OF FAIUJRES AW\IIABLE REOONDANT FUNCTirn5 Channels LT-1649 High -False High Pressurizer Level -Level control system not affected. N/A Alarm at the lbt Shutdown Panel. -<:ontrol !ban alarm capability still available.

Pir-1648 -False I.ow Pressurizer Pressure -Pressure control system not affected. N/A Alarm at the lbt Shutdown Panel. -<:ontrol !ban alarm capability still available.

..~ .

CCNI'ROl.B SYSTEM FAII1JRES

• rJIBLE # l_ - BRF:l\K OF INSTRUMEN'r LINES SYSTEM: FEEJ:l'iATER a:tfl'OOL - STEAM GENERA'IUR STEAM FI.av Sl!EE'I' 7 FAIWRE INSTRUMENl'S f-DDF.'l EFFECT'S OF FAIWRES AVl\ILl\BLE REOONl.Wll' FUNCTIONS DOONDING E.VENl' Rml\RKS Channels SGt21 FT-512 Ch I High -False initiation of: -Fl<M' control for steam generators -Initial increase in steam NOI'E: If nigh level (1) 1/2 High Steam Flew Steam 122, 123, and 124 remain operable. fl<M" decreases as steam detected by 2 out of line isolatiai signal (2/4 -Level controls for all steam gen- pressure decreases. 'l1lis 3 steam generator required and either a lcw erators remain operable. transient is bounded by level transmitters, steamline pressure or lcw -Channel II is available as the the Accidental Depressur- all associated main Tavg required for Reactor redundant channel for steam flCM ization of the Main Steam and bypass feed.olater trip). control. System analysis. valves will close.

(2) 1/2 Steam flcw/feecJ..iater fl<M" mismatch. (This coin-cident with 1/2 l<M" steam generator water level, trips the Reactor).

-If this instnment is being used as the controlling channel when the postulated failure occurs, then the foll<M"ing FALSE signals are initiated: --

False High Steam Fl<M" Signal to feed p!.DllPS and turbine speed con-trol (increases speed).

False High steam flCM signal to associated feecJ..iater control valve (opens Feed.rater valve).

(OOI'E: Mismatch causes steam gen-erator level to increase I.

-False high steam f l0o1 annuncia-tion in the Main Control Roan.

-Failure of this line causes a small steam leak.

-False high steam f l0o1 signal to Safety Injection initiation (Fs>Frefl*

SGt22

-rics22 Ch I High See FT-512, Sheet 7 -Fl<M" control for steam generators See FT-512, Sheet 7 i21, 123, and 124 remain cperable._

See FT-512, Sheet 7

a:Nl'ROL.'l SYSTEM F/\ILUW~'l T/\BLE u - llrul/\K m* INSTRUMEN'r LINES SYSTEM: FEE!l'IATER COO!'OOL - STFJ\M GFNERA'IDR STEAM FLON Sheet 7/\

FAIUJRE EFFECTS OF FAIWRES AVAILABLE REOONDllNT FUNCTIONS IJCUNDING E\IEN'I' REMARKS INS'l'RlJMENl'S OODES Channels SGl23 FT-532 Ch I High See IT-512, Sheet 7 -Flc:M CXJntrol for steam generators See FT-512, Sheet 7

1. 21, #22, and 124 remain operable.

See FT-512, Sheet 7

<XNI'IULS svsrEM FAIWRES Tl\DLE Ill - llREl\K OF' INSTRUMENI' f,INES SYSTEM: FEEll'/A'rER CCNl'IDL - srF.AM GENERAIDR STEAM FUM SHP.F.:l' 8 FAIWRE INS'mlJMENI'S 1-aJES EFFECTS OF FAIWRES AVAILABLE REOONDANT ruNCTIONS REW\RKS Channels SGl24 Pl'-542 Ch I High See FT-512, Sheet 7 -FlCM conti:ol for steam generators see FT-512, Sheet 7

1. 21, #22, and 123 remain operable.

See FT-512, Sheet 7 SGl21 FT-513 Ch II High See FT-512, Sheet 7 -Channel I is available as the redun- See FT-512, Sheet 7 dant channel for steam flCM oontrol.

See F'l'-512, Sheet 7 22 FT-523 Ch II High See F'l'-512, Sheet 7 -channel I is available as the redun- See FT-512, Sheet 7 dant channel for steam flo,.i conti:ol See FT-522, Sheet 7 SGl23 FT-533 Ch II High See F'l'-512, Sheet 7 -Channel I is available as the redun- See FT-512, Sheet 7 dant channel for steam flCM oonti:ol.

See FT-532, Sheet 7A*

SGl2 r'l'=S'43 Ch II High See FT-512, Sheet 7 -Channel I is available as the redun- See F'l'-512, Sheet 7 dant channel for steam flo,.i conti:ol.

See FT-542, Sheet B SGt21 FT-512 Ch I -False initiaticn of 1/2 Steam -Flo,.i conti:ol for steam generators -This event is bounded l:rj flCM/Feedwater flow mismatch (lCM 122, 123, and 124 remain operable. the analysis covering the Feedolater flew). (This coindicent -Level conti:ols for all steam gen- Loss of Normal Feedwater.

with 1/2 lD<i Steam Generator water era tors remain operable.

level trips the reactor). -Channel II is available as the redun-

-If this instrwrent is being used dundant channel for steam flCM conti:ol.

as the oonti:olling channel when the postulated failure occurs, then the follCMing FALsE signals are initiated: --

C<MI'ROl.S SYS'rF.M f'AI IJJRES T/lf!LE u - 13RF.N< Of' INSTRmmr LINES SYSTEM: f'EECWATER CCNl'ROL - STEl\M GENERA'IDR STF'J\M f'LO.'/ SHEIIT 9 FAIWRE INSTRUMEl'll'S MODES EFFECTS OF FAIWRES AVAILl\BLE REOON!Wfl' fUNCTIOOS BOONDING EVENT Rfl'IARKS Channe s SGl21 f'l'-512 False lCM steam flCM signal to (Cont'd) feedpUJ11lS and turbine speed con-trol (decreases speed).

False lo.1 steam flo.1 signal to associated feedwater oontrol valve (closes Feec'Water valve).

(!UI'E: Mismatch causes steam gen-erator level to decrease).

-False !CM steam f!CM annunciation in the Main Control Room.

-Failure of this line causes a small steam leak.

Fl'-522 Ch I I..cw See Fl'-512, Sheet 8 -Flo.1 control for steam generators See Fl'-512, Sheet 7 121, 123, and 124 remain ~rable.

See f'l'-512; Sheet 7 SGl23 FT-532 Ch I [£W See Fl'-512, Sheet 8 -FlCM control for steam generators See f'l'-512, Sheet 7 121, 122, and 124 remain operable.

See f'l'-512, Sheet 7 2

Fl'-542 Ch I I..cw See Fl'-512, Sheet 8 -FlCM control for steam generators See Fl'-512, Sheet 7 121, 122, and 123 remain ~rable.

See Fl'-512, Sheet 7 SGt21 f'l'-513 Ch II I..cw See Fl'-512, Sheet 8 -Channel I is availoable as the redun- See Fl'-512, Sheet 7 dant channel for steam flo.1 control.

See Fl'-512, Sheet 7

aNI'RJlS SYSTEM FAIWRF.S TABLE n - llRF.l\K m* INSTRUMENr LINES SllEF:r 10 SYSTEM: FEE!:WATER CCNl'ROL - STEAM GENERA'IUR STEAM FLCM FAIWRE AVAILABLE REOONDl\Nl' ruNCTIOOS BOUNDIN3 EVEm' REMARKS INSTIUJMEm'S !DDES EFFECTS OF FAIWRES Channels SGl22 -channel I is available as the redun- See FT-512, Sheet 7 FT-523 Ch II UM See FT-512, Sheet 8 dant channel for steam flew control.

See FT-522, Sheet 9 SGl23 -Channel I is available as the redun- See FT-512, Sheet 7 FT-533 Ch II La4 see FT-512, Sheet 8 dant channel for steam fl°'1 control.

see FT-532, Sheet 9 SGl24 -Channel I is available as the redun- See FT-512*, Sheet 7 FT-543 Ch II UM See FT-512, Sheet 8 dant channel for steam fl°'1 control.

See FT-542, Sheet 9

CXlNI'l10l.'l SYR'l'FM FAILllRFS TABLF. I 1 - 11RF.AA OF INS'l'RltlF.N'I' f ,JNF.S SYSTEM: FEE!JolATER CXNI'ROL - STEAM GENERA'IOR r FEE!JolATER Flll'1 SflP.P-1' 11 FAillmE OOIJES EFFECI'S OF FAIIIJ'REi:;

SGl21 f"l'-510 Ch I High -False initiation of 1/2 steam -Flow control for steam qenerators -'!his event is l'Ouncle<'I hv the flow/feedwater flow mismatch. 122, 123, and 124 remain or:ierahle. analysis effecti~a Minor Flr-8924 ('!his coincident with 1/2 low -Level controls for alJ steaJ11 qen- Secondary Svstein Pipe 11reaks.

steam generator water level erators remain operahle.

trips the Reactor). -Channel II is available as the re-

-If these instrunents are beinq dundant channel for feedwater flow used as the controllinq channel control.

t.'hen the postulated failure occurs, then the followilJ!! FAISE siqnals are initiated: --

False hiqh feedwater flow siqnals to associated feedwater control valve (closes feedwater valve).

Failure of Instrument Line causes a srnall feedwater leak.

-False hiah feedwater flow annun-ciation in the Main O::>ntrol R:>an.

N:ll'E: Mismatch causes steam qen-erator level to decrease.

f"l\-520 Qi I High See f"l\-510, Sleet 11 See f"l'-5111, Sleet 11 See FT-51 ll, Etteet 11

-Flow control for steam aenerators Flr-8925 High 121, 123, and 124 remain operahle.

Ch I Hi<lh See FT-510, Sleet 11 See F"l'-510, Sheet 11 See Ft-510, 9leet 11

-Flow control for steam qenerators Flr-8926 High 121, 122, and 1~4 remain operable.

f"l\-540 Ch I High See f"l'-510, Etteet 11 See FT-51 o, Sheet 11 See FT-51 O, Sleet 11

-Flow control for steam aenerators Flr-8927 High 121, 122, and 123 remain operahle.

c::<JNTROIS SYSTEM FAIUJRES TABLE t 1 - BRF.AK OF INSTRUMF.m' LINES SYSTEM: FEEl:MATER CXNl'ROL - STEAM GENERA'IDR, FEECMATER FID'/ SHEET 12 FAIWRE IDlES EFFECTS OF FAIWRES AVAIIABLE REOONDANl' fUNCTICRl anne s SGf21

~11 Ch II High See FT-510, Sheet 11 See FT-510, Sheet 11 See FT-510, Sheet 11

-<llannel I is available as the re-dundant channel for f eedwater control SGf22 FT-S21 Ch II High see FT-510, Sheet 11 See FT-520, Sheet 11 See FT-520, Sheet 11

-Oiannel I is available as the re-dundant channel for feedwater control SGl23 FT-531 Ch II High See FT-510, Sheet 11 See FT-530, Sheet 11 See FT-530, Sheet 11

-Oiannel I is available as the re-dundant channel for feedwater control.

SGt24 FT-541 Ch II High See FT-510, Sheet 11 See FT-540, Sheet 11 See FT-540, Sheet 11

-Oiannel I is available as the re-dundant channel for feedwater control SGf21 FT-510 Ch I -False initiation of 1/2 steam -Flow control for steam qenerators -'Ibis transient is bounded 'Wl'E: If High level flow/feedwater flow mismatch. 122, 123, and 124 remain operable. by the analysis effecting cretected by 2 out of Fir-B924 ('Ibis coincident with 1/2 low -level controls for all steam gen- Excessive Heat Renoval due 3 steam generator Steam Generator Water level erators remain operable. to Feedwater System mal- level transmitters, trips the Reactor). -channel II is available as the re- function. all associated main

-If these instrmients are being dundant channel for feedwater flow and bypass f eedwater used as the controllinq channel control. valves will close.

when the postulated failure occurs, then the following

~signals are initiated:

.~ ..

CONJ'OO[,.<; SYSTF.M FAIUIRES TARLE 11 - BllFAJ< OF INS'l'llllMf.111'1' Lll\TFS SYSTEM: FEE!:WATER CXNI'ROL - STEAM GENEAA'IOR, FEEIJ'IJITF.P FU:W FAIWRE OODES EFFECI'S OF FAIWRF.S A'IAHABI.E REDUNDANT FIJM'.:J'IONS anne s SGt21 F'l'-510 False low feedwater flow sional to FL-8924 associate<! Feedwater control valve (Cont'd) (opens Feedwater valve)

-Failure of Instrument line causes a small feedwater leak.

-False low feedwater f.low annun-ciation in the Main Control Room.

N:JI'E: Mismatch causes steam oen-erator level to increase.

5Gf22 F'l'-520 Ch I Low See F'l'-510, Sheet 12 See F'l'-510, ~eet 1' f:f>e F'l'-5 1O, Sheet 1'

-Flow control for steam oenerators FL-8925 Low t21, *n, am t:;>4 re111ain operahle.

F'l'-530 Ch I Low See F'l'-510, Sheet 12 See F'l'-510, Sheet 12 See F'l'-510, Sheet 11 See Pl'-510, Shl*>t 1~

-Flow control steam aenerators FL-8926 Low 121, 1:;>2, and J24 re!Nlin operable.

Ch I Low See F'l'-510, Sheet 12 See F'l'-510, !:heet 12 f;ee F'J'-5111, ~eet 1?.

-Flow control for steam qenerators FL-8927 Low t21, 122, .anrl t23 re111ain operahle Ch II Low See F'l'-510, Sheet 12 See F'l'-510, Sheet 12 See F'T'-5111, Sheet 12 See F'l'-510, Sheet !:'-

--<llannel I is available as the re-dunc'lant channel for f eedwater control F'l'-521 Ch II Low See F'l'-520, Sheet 13 See F'l'-5211, Sheet 13 See F'l'-520,  !'1t>eet 13

--<llannel I is availahle as the re-nunflant channel for f~ater rontrol.

ONl'ROfAc; sYSTF'11 F'AIUJRES T/IBLE U - RREllK OF' INSTRU111'N'l' UNF.S SYSTrn: FEEll'IA~ CCNl'ROL - STEAM GENERA'IOR, F'EEJ:M/ITER F'LCM RHF'P.l' 14 Fl\IUJRE MJDES EFFECTS OF Fl\IWRF'.S AVAILABLE RFTIJNDJWI' FllNCTIOOS RF'11ARKS Channe s SGl23 FT-531 Ch II See FT-530, Sheet 13 See FT-530, Sheet 13 See FT-530, Sheet 13 See FT-530, Sheet 13

-Channel I is available as the re-dundant channel for feedwater con-trol.

SGl24 FT-541 Ch II See FT-540, Sheet 13 See FT-540, Sheet 13 See FT-540, Sheet 13 See FT-540, Rheet 13

-Channel I is available as the re-dundant channel for feedwater control.

crnrror..s SYS'l'r.M FAIUJRES TARLP. ffl .:. BRF.AK OP INS'l'RUMEN'l' LINP.S SYSTEM: FEEll'IATER CXNI'FOL - STEAM GENERA'IlJR LEVEL, NARROW RJ\N:iE SHP.P.T 15 FAILURE INS'lWMENI'S OODES EFFECT'S OF FAIWRF.S OOUNDING P.VENI' REMJIRKS ellannels

. LT-519 ell II High -False initiation of 1/3 steam gen- -ellannels III or IV are available -'ltlis event is bounded by NCJI'F.:

erator Hi-Hi level turbine trip as redundant channels for steam the analysis effecting ""Hf9h level detection signal. generator level, narra.i range Minor Seoondary System by 2 out of 3 steam

-If this instrunent is being used protection. Pipe Breaks. generator level as the oontrolling channel when transmitters will the postulated Failure occurs, close all assoc~ated then the following FALSE signals main and bypass are initiated: feedwater valves.

False high level signal to its assicated Feedwater Control Valve (closes feedwater valve),

-Failure of this Instrunent line

• causes a small steam leak.

-False high level annunciation in the Main Control Roan LT-529 di I High See LT-519, Sheet 15 (High) See LT-519, Sheet 15 (High) See LT-519, Sheet 15 See L'l'-519, Sheet 15 (Hiqh) (High)

LT-539 di I High See LT-519, Sheet 15 (High) see LT-519, sheet 15 (High) See LT-519, Sheet 15 See LT-519, Sheet 15 (High) (High)

LT-1642 High LT-549 ell II Hi9h See LT-519, Sheet 15 (High) See LT-519, Sheet 15 (High) See LT-519, Sheet 15 (Hi h)

LT-519 II LcM 3 steam gen- - anne s III or IV are ava a e NOl'E:

erator ~Low water level Reac- as redundant channels for steam the analysis effectinq ---rfitigh level is de-tor Trip signal (2/3 required for generator level, narrow range Excessive Heat Removal due tected by 2 out of 3 Reactor trip). protection. to Feedwater System mal- steam generator

-If this instrunent is being used function. level transmitters, as the controlling channel when then all associated the postulated failure occurs, main and bypass then the following FALSE signals feedwater valves are initiated: will close.

CCNJ'roI.'l SY8TEM FAIUIRF.S TAALE u - ARF:AK OF INSTRllMFNT' r.uw.s SYSI'EM: FEE!lolATER CXNl'ROL - STEAM GENERA'IDR LEVEL, NARRCM RAfr.F: SllF:P.l' u; FAILURE INSTR!JMENr.' l'llDF.5 EFFECl'S OF FAILURES AVAILABLE RF.IX.JNDAm' FUNCTictTS Cllanne s LT-Sl9 (Cont'd) False low level signal to its associated Feedwater Control valve (open feedwater valve),

-Failure of this Instrunent line causes a small steam leak.

-False low level annunciation in the Main Control Room.

LT-529 di I Low See LT-519, sheet 15 (Low) See LT-519, Sheet 15 (Low) See LT-519, sheet 15 See LT-519, Sheet 15 (Low) (IDw)

LT-539 Ch I Low See LT-519, sheet 15 (Low) See LT-519, Sheet 15 (Low) See LT-519, Sheet 15 See LT-519, Sheet 15 (Low) (Low)

LT-1642 Low LT-549 di II Low See LT-519, sheet 15 (Low) See LT-519, Sheet 15 (I.owl See LT-519, sheet is (Low) See LT-519, Sheet 15 (Low)

CXNJ'ROIS f:YS'l'F.M FAIWRF.S TABI.F. t 1 - BRF.AK OF INR'l'Rl~f;r.11' LJNF$

SYS'IBM: FEECW\TER CCNl'ROL - STEAM GENERA'IUR, STEAM PRESSlffiF.

FAIWRE KlDES EFFECJ'S OF FAIJ.URES AVAHAflI.F. REDUNMNl' FUNCTIONS anne S P'l'-514 di I Low - False initiation of: - Oiannel II is available as the - 'lhis event is houn<'IP.d t>y (1) 1/3 Low Steamline Differential rl'ilundant channel for pressure the Accinental nt>prPssur-Pressure Siqnal ( 2/3 required control. ization of t.he Main Steam for Reactor trip). System anaJvsis.

(2) 1/2 Low Steam Feedwater Flow mismatch siqnal. ('Ihis coincident with 1/2 [DW Steam Generator Water Level required for Reactor trip).

- If this instrunent is being used as the controllinq channel when the postulated failure occurs, the followil'lQ F.AISE siqnals are initiated: * - -

False low pressure siqnal to feed-water Pl.DP speed control.

False low pressure signal to assoc-iated feedwater control valve.

- Failure of instrument line causes a small steam leak.

- False low pressur;e annunciation in the Main Cbntrol lb:Jm.

Pl'-524 di I Low See P'l'-514, Sleet 17 See P'I'-514, illeet 17 See P'J'-514 , illeet 17 P'IL534 Qi I LOW see J5'1L514, Sieet 17 see P'l'-514, Sheet 17 Ree P'iL514, §Ii pet 17 P'IL544 Qi I row see J5'1L514, §ieet 17 see P'I'-514, §ieet 17 see p>jL t; 14, Sheet 17 Pl'-515 di II Low See P'l'-514, Sleet 17  ::a1annel I Is available as the See P'I'- ~ 14, Sheet 17 redundant channel for pressure control.

crnT!lOLS SYSTF.M FAIUJRF'B TARLF: tl - ARF.l\K OF INSTRUl'IFNT LINF:S SYSTEM: FEEll'IATER CXNl'ROL - STF..AM GENERA'IUR, STFJ\H PRF.SSURE SHF:P.I' lR FAIWRE INSTHJMmrS MJDES EFFECTS OF FAILURF.S AVAILABLE RF.OONllANI' FUNCTICllS ro!JNDING F.llFNI' RFMAAKS Channels Pl'-525 Ch II Low See P'l'-515, Sheet 17 See P'l'-515, Sheet 17 See P'l'-515, Sheet 17 Pl'-535 di II Low See P'l'-515 , Sheet 17 See P'l'-515, sheet 17 See P'l'-515, Sheet 17 Pl'-545 di II Low See P'l'-515, Sheet 17 See P'l'-515, Sheet 17 See P'l'-515, Sheet 17

l rorrnoL.'l SVSTFl1 FAUJIRl'S T.1\11T,F. 11 .:. nru::l\K OF INSTRlllf'N'r r,rnr.s SYSTEM: .STF.AM OOMP SllF.P.I' 19 FAIWRE fol)OJ'll EFFECTS OF FAILURES AVAILABLE REOONill\m' FllNCTICl'IS OO!INnIOO F.VFMr Rfll/\RKS Channels PT-507 Low -If these instrunents are being -All al:JllJspheric steam relief valves, N/11 -steam Olm'1 \.ontrol

• Plr727 N/A used when the postulated failure MS lO's, remain operahle. is not a safety re-occurs, a false low pressure -All steam safety valves remain lated system and signal to steam duip is initiated. operable. therefore doeR not

-False low pressure annunciation, require redundancy.

locally and in the Main Control lb:m.

-Failure of inst:runent line causes a snall stean leak.

-False low pressure signal to the feed punps and turbine speed control.

l"l'-508 -If this lnstr1m1ent Is being used N/A when the postulated failure occurs, a false low pressure signal to the feed pmps and turbine speed control is initiated.

-False low pressure annunciation in the Main Control lb:m.

CONTROL SYSTEMS FAILURES ANALYSIS - TABLE #2

cnrmJL SYSTEM FAllJIRES TABLE 12 - BREA!( OF ~ INS'rnlJMENl' LINES SYSTEM: PRESSURIZER PRESSURE AND LEVEL CXNl'RJL SHEET 1 FAIUJRE KDES EFFECI'S OF FAIWRES AVAILABLE REIJJNlll\Nl' EUNCTIOOS RE11ARKS Channels Pl'-455 Ch I low - Failure of: - Channel III ls available as the - 1bls event is bounded by - 1bis event causes a L'l'-45!1 Ch I Hiqh (1) 2/4 Pressurizer low Pressure redundant channel for pressure the inadvertent openinq of Reactor Trip (above Pl'-474 Ch IV low Signal (Jeactor Trip above control. a pressurizer safety valve P7).

P7). - Channels II or III are available as associate<! with the (2) 1/3 Hiqh Water level Reactor as the redundant channels for llccidental Depressurlzation Trip Signal (2/3 required level control. of the Reactor Coolant System for Reactor trip). - Channel II ls available as a analysis.

(3) 1/3 Pressurizer low Pressure redundant dtannel for control Safety Injection Signal. relief o~ Rlwer Operated RP.lief

- If these instrmients are beinq Valve PR1.

used as the controlling channels when the postulated failure occurs, then these instruments initiate the followinq FAISE signals: --

False operation of the Pressurizer Heaters (turns-on)

• False hiqh level siqnal decreases charging puq> flow.

- False low pt"essure (Ch's I ' IV) am False high level (Ch II annun-ciations in the Hain Control ltxxn.

- loss of operation for:

(1) Pressurizer*~r Operated Jelief Valves PR1 am PR2.

( 2) Spray Valves PSI am PS3.

Pl'-456 Ch II low - False initiatioo of1 - Channel IV is available as the See above - 1bis event will not L'l'-460 Ch II High (1) 1/4 Pressurizer low Pressure redundant channel for control cause a Reactor Trip.

. Reactor Trip Signal (2/4 relief of tuwer Operated llelief required for lleactor Trip). Valves PR1 and PR2.

(2) 1/3 Hiqh Water level Reactor Trip Signal (2/3 required to Trip Reactor).

(3) 1/3 Pressurizer low Pressure Safety Injectioo Signal.

TABLE *2 - BllFJllC OP ~ ItJITTlllJ.ll'NI' J,JJllF.S SYSI'EH: PIIBSSURIZER PRESSURE AND LEVEL <nfl'ROL FAIWRE K>DES EFFF.Cl'S OF FAIUJRES Rflo!AlllStulated failure occurs, - OJannels I or III are available then these instrlJTl!!nts as the redundant channels for initiate the followina pressure control.

FALSE siqnals:

False operation of the Backup heaters (hiqh level - turns-on).

False hiqh level si911al decreases cha1:9ina ptJTp flow.

- loss of (\'.leration of Pressurizer Power ~rated Relief Valve PR1.

- False low pressure (OJ II) and False high level (<ll III annun-ciations in the Main Cbntrol lhom.

(OOIB: Channel II low press-ure does not effect pressurizer heaters).

P'l'-457 OJ III lDw - False initiation of: - <llannel I is available as a See !lleet 1 - 'l!lis event will not P'l'-458 N/A ffiqh (1) 1/4 Pressurizer lDw Pressure redunrtant channel for pressure cause a Reactor Trip.

LT-462 N/A High Reactor Trip Siqnal (l\bove control.

LT-°'461 OJ III Hiqh P7, 2/4 reQUired for Reactor - Channels I or II are available LT-1649 ffiqh Trip). as the redundant channels for PT-1648 1.oW (2) 1/3 Hiqh Water Level Reactor level control.

Trip Siqnal ( 2/3 reQUired - OJannel II is availahle as a for Reactor Trip). redumant channel for control (3) 1/3 Pressurizer IDw Pressur relief of Power q:>erated Relief Safety Injection Siqnal. Valve PRI.

- If these instrlJTl!!nts are - Channel IV is availahle as a beinq used the control- redumant channel for cnntrol ling channels when the relief of Power q:>erated Relief postulated failure occurs, Valves PR1 and PR~.

then the followina FALSE; siqnals are initiatecr=-

False operation of the pressurizer heaters (turns-on I .

crnrROI, S'lSTFl1 FAIIJIRES TADLE 12 - .BREAK OF CXJ1l1JN ltlb'TR!JMFNI' I.INF.S SllEF.T l SYSfF11: PRESSURIZER PRESSURE AUD LE\TEL OJNl'ROL FAIWRE AVAILADLE REOONDANl' FUNCTIONS mwiKs OODES EFFECI'S OF FAIWRES Channels PT-457 Loss of operation:

Pl'-458 Ill Pressurizer PcMer Operated LT-462 Relief Valves PRl and PR2.

LT-461 (2) Spray Valves PSl and PSJ.

LT-1649 False high level signal decreases P!rl648 charging PJll> flow.

(Cont'd) - False low pressure (Ch III) and False high level (Ch Ill) Annun-ciations in the Main Control Roan.

CCN!'ROL SYSTEM FAIWRES TABLE 12 - BREAK OF CGM:N INSTRllMENT LINES SYSTF.M: STEAM DUMP SHEET 4 FAIUJRE MCDES EFFEC'l'S OF FAIWRES AVAILABLE REOONDANl' RnCI'IONS Channels SGl21 Pi'=ST6A Ch I I.ow - False indication of 1/4 low - All other atm:>spheric steam N/A - Failure of atm:>spheric Pl'-516 Ch I Cow steamline pressure (2/4 relief valves, 122, 123, and reliefs do not pose a Pl'-1644 Cow required and 2/4 high 124 MS 10 remain operable. problem due to avail-steam line flow required - All steam safety valves remain ability of the steam to trip reactor). operable. safety valves.

- Failure of associated steam 'IVI'E: S.I. initiated generator atm:>spheric relief 'fiY!/3 low steam line valve M.SlO (valve closes). differential pressure.

- Failure of this instrunent line causes a small steam leak.

• SGl22 Pl'-526A Ch II I.ow See SGl21 - All other atm:>spheric steam relief N/A See SGl21 Pl'-526 Ch II I.ow valves, 121, 123, and 124 HS 10 Pl'-1645 I.ow remain operable.

- All steam safety valves remain operable.

&;123 Pi'=Sl6A Ch III I.ow See SGt21 - All other atm:>spheric steam relief N/A See SGl21 Pl'-536 Ch III I.ow valves, 121, 122, and _124 MS 10 Pl'-1646 I.ow remain operable.

- All steam safety valves remain operable.

SGl24 PiC5t6A Ch IV I.ow See SGt21 - All other atm:>spheric steam relief N/A See &;121 Pl'-546 Ch IV I.ow valves, 121, 122, and 123 M.S 10 Pl'-1647 I.ow remain operable.

- All steam safety valves remain operable.

CCNl'IUL SYSTEM FAIWRES TADLE #2 - BREAK OF CDHJN INSTR!JllENT LINF'..S SHEET 5 SYS'l'EH: FEEl:MATER eotn'IDL - REAClDR am..J\Nl' TEMPERA'IUE FAIWRE REMARKS r-l)DES EFFECTS OF FAIWRES AVAILABLE REOONDANI' FUNCTIONS INSTRlJMENI'S Channels SGt24 - All reactor coolant tenperature - The transient is bounded - Deviation alarms alert TE-441A OI IV - If these instruments are being the operator when any used when the postulated failure instruments in hot and ex>ld legs I=!{ the analysis resulting TE-4418 Ch IV in actuation of ~rgency one loop's temperature occurs, the folla.1ing FALSE for loops 121, 122, 123 remain Signals are transmitt~the operable. Core Cooling caused I=!{ the is abnormally la.1 com-loss of Reactor Coolant pared to the auction-Reactor Protection System: eered high Tavg or False initiation of: fran small ruptured pipes.

high AT signal.

(1) 2/4 I..c:w Tavg Signal (prevent suboooling and loss of shut do,.in margin on a reactor trip I=!{ isolation of feed-water system).

(2) 2/4 Low-Low Tavg Signal (establishes Pl2 permissive; used in ex>incidence with high steamline flCM as indication of steamline break and generation of safety injection signal).

(3) LoOpAT-Overtenperature

,6T trip (2/4 ex>incident) used as a measure of reactor pCMer.

(4) OVerpCMer ll.T trip (2/4 ex>incident)-used as a measure of reactor pCMer.

Also acts to la.1er the base trip setpoint established for full PQ<ler Tavg.

(5) LCX>p Tavg-overtenperature AT Trip (2/4 ex>incident)-

acts to la.1er the base trip setpoint established for full pCMer Tavg.

- Failure to this 2" reactor coolant line casues a small UXA.

CONTROL SYSTEl'1 FAil1JRES TABLE #2 - BREAK OF crnMOO INSTRIJMENl' LINES SHEffi' 6 SYSTEl'1: FEE!l'IATER CXNI'ROL - REACIIJR COOLANT TEl'1PERATURE FAIUJRE BOUNDI~ EVENT INSTRlJMENl'S OODES EFFECTS OF FAIWR&S AVAILABLE REIJUNDANl' FUNCTIOOS Oiannels SGl23" See TE-441A-B Sheet 5 TE-431A Ch III low See TE-441A-B Sheet 5 - All reactor ooolant tenperature TE-431B Ch III low instruments in hot and cold legs for loops 121, 122 and 124 remain operable.

SGl22 See TE-441A-B Sheet 5 TE-421A Ch II low See TE-441A-B Sheet 5 - All reactor ooolant tenperature TE-421B Ch II low instruments in hot and cold legs for loops 121, 123, and 124 remain operable.

SGl21 See TE-441A-B Sheet 5

'IB-411A Ch I low See TE-441A-B Sheet 5 - All reactor ooolant tenperature TE-4118 Ch I low instruments in hot and cold legs for loops 122, 123, and 124 remain operable.

CCNI'ROL SYSTF.M FAIUJRES TABLE 42 - BREAK OF ~ INSTRIJMEtn' LINES SYSTF.M: STEAM DUMP SHEET 7 FAIUJRE l'DJES EFFECTS OF FAIUJRES AVAILABLE REDUNDAm' ruNCTIOOS REMARKS Cllannels Pl'-505 Cll I low - If these instruments are being - Cllannel II is available as a N/A - Steam dump control PL-183 low used for control INhen the postu- redundant channel for steam is not a safety re-PA-8529 low lated failure occurs, the fol- dump control. lated system and PD-459 low lowing FALSE Signals are therefore does not initiatecr.- require redundancy.

If Steam Pressure is controlling Steam IAJrnp then the false low pressure signal is sent to the condenser dlJlli> valves. (IAJrnp Valves nr:idulate to equalize turbine and reactor loads).

If Tavg is controlling Steam IUnp then a False low Tavg signal is used in a control of load rejection. (!Unp valves respond to F.qualize Tavg and Tref).

- False low signal for first stage turbine irr{lulse pressure to steam dump control.

- False low signal for load rejec-tion in Electro-hydraulic Control.

- False low signal for turbine trip in Electro-hydraulic Control.

- False low pressure annunciation, locally and in *the main control roan.

- Failure of instrument line causes a small steam leak.

- False low signal blocks rod with-drawals Pl'-506 Cll II low - If these instruments are being - Cllannel I is available as a redun- N/A See Pl'-505, Sheet 7 PA-6110 N/A used for control INhen the postu- dant channel for steam dump control.

lated failure occurs, a false low signal for the first stage turbine imp.llse pressure to steam dump control is initiated.

CXNI'ROL SYSTEM FAIWRES TABLE 12 - DREAK OF (J)tfil'I lNSTRUMENT LINES SYSTE?l: STEAM llJMP SHEP.I' 8 FAIWRE AVAILABLE REOONDANI' ruNCTIOOS REMARKS r-DDES *---E=F""F"'E"'CTSc=_O""F'-~F°":AI=WRES==-

Channels Pl'-506 - False low ~ssure annunciation in PA-6110 the main control roan.

(Cont'd) - Failure of instrument line causes a small stean leak.

CONTROL SYSTEMS FAILURES ANALYSIS - TABLE #3

CTWroL SYS'J'F.H FAJWRFS TAllLF. #3 - FAIWRE OF F.XCORE NUCLFJ\R JNSTRIJMFNI'ATIGI SYSTEM: NUCLEAR INS'l'RUMENI'ATIOO SHRP.P 1 FAIWRE MODF.S F.FFECl'S OF FAILURES AVAILARLE RF.OONlW'1'I' FllNCI'IOOS Channels NEl-35 Ch I High -If this channel is being used when -Channel II is available as the -'!'he event is bounded by the postulated failure occurs, the redundant channel for protection. the Uncontrolled Rod following FAI..5E signals are trans- Cluster Control Assembly mitted: - - Bank Withdrawal at Power.

(1) 1/2 High Neutron* Flux Reactor trip signal. ('Ibis coincident with the pc:Mer above P-6 but less than P-10 trips the Reactor).

(2) 1/3 High Neutron Flux Rod Stop signal (Block Rod Withdrawal).

('Ibis coincident with an unini-tiated Trip Bypass and Rod Stop Block provides Rod Step).

(3) 1/2 P-6 permissive Signal. ('Ibis coincident with Manual Rod Block provides block of High Neutron Flux Reactor Trip).

(4) False high Neutron Flmc annunciation in the Main Control Roan.

NB-36 Ch II High See NE-35, (High) Sheet 1 -Channel I is available as the re- See NFl-35 (High), f:heet 1 dundant channel for protection.

NEJ-35 Ch I If this channel is being used when -Channel II is available as the See NFJ-35 (High), Sheet 1 the postulated failure occurs, the redundant channel for protection.

follCMing FALSE signals are transmittea=-

(1) 1/2 LCM Neutron Flux Reactor Trip Signal.

(2) 1/3 LCM Neutron Flux Rod Stop Signal.

(3) 1/2 LCM P-6 permissive signal.

(4) False LCM Neutron Flux annunciation in the Main Control Roan.

CCNrRIJL SYSTF.M FAIUIRF.S TABLE 13 - FAIUIRE OF EXOORE NUCLEAR INSTRUMEm'ATICJil SYSTEM: NUCLEAR INSTHJMEm'ATICJil SHEET 2 FAIUJRE IOJES EFFECTS OF FAIUJRES AVAIUtBLE REIXlNDl\Nl' FUOCTICJilS BOONDING EVEm' Channels NE-36 di II Low. See NE-35, (low) Sheet 1 -channel I is available as the re- See NE-35 (Hiqh), Sheet dundant channel for protection.

NE-41 CH I High -If this diannel is being used When -Olannels II, III, and 'N are avalla- see NE=lS (H1qh), Sheet the postulated failure O<.."'Cllrs; the ble as redundant channels for pro-followinq FALSE signals are trans- tection.

mitted: - -

(1) 1/4 High Neutron Flux Rate Reactor Trip Signal (2/4 re-quired for trip).

(2) 1/2 High OU'erpower ~ Stop signal. ('nlis coincident with uninitiated Manual Bypass blocks Autanatic and Manual ~ With-drawal).

(3) 1/4 P-8 permissive High siqnal (2/4 required for P-8 permissive).

( 4) 1/4 P-7 and P-10 permissive High signals (2/4 required for P-7 and P-10 permissive).

(5) 1/4 Hiqh Neutron Flux Reactor trip siqnal-High Setpoint (2/4 required for Reactor trip).

(6) 1/4 Hiqh Neutron Flux Reacto~

Trip signal-Low Setpoint (2/4 required for Reactor trip).

(7) 1/4 False High siqnal to Upper and IDWer Flux l'inplifiers which supply inputs to the CNertemper-ature~ T and CNerpower.AT Reactor Trips, (2/4 each is required for trip), and to the CNertemperature

.AT and CNerpower AT Auto Tl.lrbine Runback and Block Auto. and Manual ~ Withdrawal (2/4 each is required).

(8) False High Neutron Flux annun~

elation in the Main Control

!ban.

CONl'ROL SYSTF.'1 FAIIJJRES TABLE .13 - FAHJJRE OF EXalRE NUCLEAR INSTR!lMENl'ATIOO SYSTEM: NOCLFAR INSTRlJMENI'ATIOO SHEET 3 FAIWRE INS'l'RllMElfi'S !ol)OES EFFF.CTS OF FAIIJJRES AVAILABLE REDClNllAm' FmCJ'IOOS BOONDIOO EVEm' diannels NE-42 Cl"I II High. See NE-41, Sheet 2 -channels I, III, and IV are availa- See NE-35 (High), Sheet ble as redundant channels for pro-tection.

NE=43 di III High See NE-41, Sheet 2 =<::flannels I, II, alii IV are availa- see NE-35 (Hiqh), Sheet ble as redundant channels for pro-tection.

NE=44 Qi IV High see NE-41, Sheet 2 =<l'iannels I, II, aiil III are availa- see NE-35 (High) , Sheet ble as redundant channels for pro-tection.

NE-41 di I -If this Channel Is being used iJlen =tfiannels II, III, ai'rl IV are availa- See NE-35 (High), sheet the postulated failure occurs, the ble as redundant channels for pro-following FALSE signals are trans- tect ion.

mitted: - -

( 1) 1/ 4 row Neutron Flux Rate Reactor Trip Signal.

( 2) 1/2 low Ollerpower lbd Stop Signal.

(3) 1/4 P-8 permissive IDw signal.

(4) 1/4 P-7 and P-10 permissive low signals.

(5) 1/4 low Neutron Flux Reactor

• trip signal - High Setpoint.

(6) 1/4 IDw Neutron Flux Reactor trip signal - Iow Setpoint.

(7) 1/4 False low signal to Upper and rower Flux Amplifiers wich supply inputs to the Oller-temperature /jT and Ollerpower AT Reactor trips, and to the Oller-power .!lT Auto. 'l\Jrbine Runback and Block Auto and Manual lbd Withdrawal.

(8) False row Neutron Flux annun-ciation in the Main Control

!ban.

CDll'ROL SYSTEM FAIUJRES TABLE 13 - FAIUJRE OF EXOORE NUCLF.J\R INSTruJMEtll'ATION SYSTEM: WCLEAR INSTRUMENTATION SHEP.l' 4 FAIWRE INSTRUMENIS MOOES EFFOCTS OF FAIUJRF.S AVAIUIBLE REIXlNDIWl' FUOCTIONS BOONDING EllENl' REMARKS Oiannels NE-42 Oi II row See NE-41, Sheet 3 -channels I, III, and r.v are availa- Se NE-35 (High), Sheet ble as redundant channels for pro-tection.

NE-43 Of III row see NE-41, Sheet 3  ::Channels I, II, aiii r.v are availa- see NE-35 (High), Sheet ble as redundant channels for pro-tection.

NE Qi IV I.ow See NE-41, Sheet 3 :cliannels I, II, and III are availa- flee-NE-35 (High), Sheet ble as redundant channels for pro-tect ion.

-:-'t*

CONTROL SYSTEMS FAILURES ANALYSIS - TABLE #4

CONTl!OL SYSTEM FAILURES Sheet TABLE H4 - LOSS OF POWER SOURCES SYSTEM: PRESSURIZER PRESSURE AND LEVEL CONTROL INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels PT-455 Ch. I A If Channel I is being used as the Channel III is available as the These events are Ref:

control channel when the postu- redundant control channel. bounded by the Appendix A-pages 1, lA, lated failure occurs, the follow- Channels II and IV are also available analysis asso- 5 and 7.

ing happens: for reJundant control of Auto Turbine ciated with the

-Loss of related operation of: Runback and Block Auto and Manual Rod Acci den ta 1 De-(1) Heater Control-Variable pressuri za tion Signal. Iii thdrawa 1. of the Reactor (2) Spray Valves PSl and PS3. Coolant System.

(3) Group 21 and 22 Back~up Heaters.

(4) Power Operated Relief Valve PR2. .

(5) Auto Turbine Runback and Block Auto & Manual Rod Wi thdrawa 1.

B None None c If Channel I is being used as the control channel when the postu-lated failure occurs, the follo~i None ing happens:

-Loss of related operation of:

(1) Heater Control-Variable Signal.

(2) Spray Valves PSI and PS3.

(3) Group 21 and 22 Back-up Heaters.

(4) Power Operated Relief Valve PR2.

D If Channe 1 I is being used as the control channel when the postu-1a ted failure occurs, the fo 11 owing None happens:

-Loss of related operation of Power Operated Relief Valve PR2.

CONTROL SYSTEM FAILURES Sheet 2

. TABLE #4 - LOSS OF POWER SOURCES SYSTEM: PRESSURIZER PRESSURE AND LEVEL CONTROL INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels PT-456 Ch. II A If Channel II is being used as the See PT-455, Ref:

relief channel when the postulated Sheet #1. Appendix A-pages 2, 2A, failure occurs, the following None 5 and 8.

happens:

-Loss of related operation of Power Operated Relief Valve PRl.

B If Channei II is being used as the Channels I, III and IV are available relief channel when the postulated for redundant control of Auto Turbine failure occurs, the following Runback and Block Manual and Auto Rod happens: Wi thdrawa 1.

-Loss of related operation of:

(1) Power Operated Relief Valve PRI.

(2) Auto Turbine Runback and Block Auto and Manual Rod Withdrawal.

c If Channel II is being used as the relief channel when the postulated failure occurs, the following Ncine happens:

-Loss of related operation of Power Operated Relief Valve PRl.

D None None

CONTROL SYSTEM FAILURES Sheet 3 TABLE 04 - LOSS OF POWER SOURCES SYSTEM: PRESSURIZER PRESSURE AND LEVEL CONTROL INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels PT-457 Ch. Ill A If Channel III is being used as the See PT-455, Ref:

control channel when the postulated Sheet #1 .~ppendix A-pages 3, 3A, failure occurs, the following None 5 and 9.

happens:

-Loss of related operation of Power Operated Relief Valve PRl.

B If Channel III is being used as the control channel when the postulated failure occurs, the following None happens:

-Loss of related operation of Pm~er Operated*Relief Valve PRl.

c If Channel Ill is being used as the Channels I, II and IV are also available control channel when the postulated for redundant control of Auto Turbine failure occurs, the following Runback and Block Auto and Manual Rod happens: l~i thdrawa l.

-Loss of related operation of:

(1) Power Operated Relief Valves PRl and PR2.

(2) Heater Control-Variable Signal.

(3) Spray Valves PSl and PS3.

(4) Group 21 and 22 Back-up Heaters.

(5) Auto Turbine Runback and Block Auto and Manual Rod Hithdrawa l.

D If Channel III is being used as the Channel II is available as the redundant control channel when the postulated channel for operation of Power Operated failure occurs, the following Relief Valve PRl.

happens:

-Loss of related operation of Power Operated Relief Valves PRl and PR2.

CONTROL SYSTEM FAILURES Sheet 4 TABLE #4 - LOSS OF POWER SOURCES SYSTEM: PRESSURIZER PRESSURE AND LEVEL CONTROL INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels PT-474 Ch. IV A If Channel IV is being used as the Channel III is available as the re- See PT-455; Ref:

relief channel when the postulated dundant channel for operation of Power Sheet #1 ~ppendix A-pages 4. 4A, failure occurs, the following Operated Relief Valve PR2. 5 and 10.

happens:

-Loss of related operation of Power Operated Relief Valves PRl and PR2.

B If Channel IV is being used as the relief channel when the postulated failure occurs, the following None happens:

-Loss of related operation of Power Operated Relief Valve PRl. *

c. If Channel IV is being used as the relief channel when the postulated fa i1 ure occurs, the fo 11 owing None happens:

-Loss of related operation of Po~1er Operated Relief Valves PR! and PR2.

D If Channel IV is being used as the Channel II is available as the re-relief channel when the postulated dundant channel for operation of Power failure occurs, the following Operated Relief Valve PR!.

happens: Channels I, II and III are available

-Loss of related operation of: for redundant contra l of Auto Turbine (1) Power Operated Relief Valves PRl and PR2. Runback and Block Auto and Manual Rod (2) Auto Turbine Runback and Block Wi thdra1*1a 1.

Auto and Manual Rod Withdrawal.

CONTROL SYSTEM FAILURES Sheet 5 TABLE H4 - LOSS OF POWER SOURCES SYSTEM: PRESSURIZER PRESSURE AND LEVEL CONTROL INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS .

(Loss)

Channels LT-459 Ch. I A If Channel I is being used as the Channels II and Ill are available as See PT-455,' Ref:

control channel when the postulated redundant control channels. Sheet #1 Appendix A-pages 6, nA, failure occurs; the fo 11 owing 45 and 46. NOTE: Worst happens: case-lo~s of VP" signal

-Loss of related operation of: to heaters. *

(I) Channel I operation.

(2) Block *Auto Control and opera-tion of Group 21 and 22 Back-up Heaters.

(3) Speed Signal to Charging Pump.

(4) Block Closed Letdown Isolation Valves CV 2, 3, 4, 5 and 277.

B If Channel I is being used as the Channel III is available as the redun-control channel when the postulated dant control channel except for operation failure occurs, the following of Letdown Isolation Valve CV277.

happens:

-Loss of related operation of:

(1) Block Auto Control and opera- (NOTE: Channel I operation is only partially tion of Group 21 and 22 Back- available.)

up Heaters.

(2) Speed Signal to Charging Pump.

(3) Block Closed Letdown Isolation Valves CV 3, 4, 5 and 277.

c If Channel I is being used as the Channel II is available as the redundant control channel when the postulated control channel for Letdown Isolation failure occurs, the following Valve CV 3, 4, 5 and 277 and Block opera-happens: tion of Group 21 and.22 Back-up Heaters.

-Loss of related operation of:

(1) Block Auto Control and opera- (NOTE: Channel 1 operation is tion of Group 21 and 22 Back- only partially available.)

up Heaters.

(2) Speed Signal to Charging Pump.

(3) Block Closed Letdown Isolation Valves CV 2, 3, 4 and 5.

CONTROL SYSTEM FAILURES Sheet 6 TABLE 04 - LOSS OF POWER SOURCES SYSTEM: PRESSURIZER PRESSURE AND LEVEL CONTROL INSTRUMENTS VITAL BUS EFFECTS.OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels LT-459 Ch. I D If Channel I is being used as the Channels II and III are available as (Cont'd) control channel when the postulated redundant contra l channe 1s for Let-failure occurs, the following down Isolation Valves CV 3, 4, 5 and happens: 277 and Block operation of Group 21

-Loss of related operation of: and 22 Back-up Heaters.

(1) Block Auto Control and opera-tion of Group 21 and 22 Back-up Heaters. (NOTE: Channel I operation is only (2) Speed Signal to Charging Pump. partially available.)

(3) Block Closed Letdown Isolation Valves CV 2, 3, 4 and 5.

LT-460 Ch. II A If Channel II is being used as the Channel III is ~vailable as the redun- See PT-455, Ref:

control channel when the postulated dant control channel. Sheet #1 Appendix A-pages 6, 6B, failure occurs, the following 45 and 46. !!QU:_: Wars t happens: case-loss of S/P signal

-Loss of related operation of: (NOTE: Channel II operation is only to heaters.

(1) Block Auto Control of Group 21 partially available.)

and 22 Back-up Heaters.

(2) Speed Signal to Charging Pump.

B If Channel II is being used as the Channels I and III are available as control channel when the postulated redundant control channels except for failure occurs, the following operation of Letdown Isolation Valve happens: CV277.

-Loss of related operation of:

(1) Channel II operation. .

(2) Block Auto Control and opera-tion of Group 21 and 22 Back-up Heaters.

(3) Block Closed Letdown Isolation Valves CV 2, 3, 4, 5 and 277.

(4) Speed Signal to Charging Pump.

CONTROL SYSTEM FAILURES Sheet 7

. TABLE 04 - LOSS OF POWER SOURCES SYSTEM: PRESSURIZER PRESSURE AND LEVEL CONTROL INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUllDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels LT-460 Ch. II c If Channel II is being used as the Channel I is available as the redun- See PT-455,"

(Cont'd) control channel when the postulated dant control channel for Letdown Sheet #1 failure occurs, the following Isolation Valves CV 3, 4, 5 and 277 happens: and Block operation of Group 21 and

-Loss of related operation of: 22 Back-up Heaters.

(1) Block Auto Control and opera-tion of Group 21 and 22 Back-up Heaters. .

(2) Block Closed Letdown Isolation (NOTE: Channel II operation is only Valves CV 2, 3, 4 and 5. partially available.)

(3) Speed Signal to Charging Pump.

D If Channel II is being used as the Channels I and ill are available as control channel when the postulated the redundant control channels for failure occurs, the following Letdown Isolation Valves CV 3, 4, 5 happens: and 277, and Block operation of Group

-Loss of related operation of: 21 and 22 Back-up Heaters.

(1) Block Auto Control and opera-tion of Group 21 and 22 Back-up Heaters. (NOTE: Channel II operation is only (2) Speed Signal to Charging Pump. partially available.)

(3) Block Closed Letdown Isolation Valves CV 2, 3, 4 and 5.

LT-461 Ch. III A If Channel III is being used as the Channel II is available as the redun- See PT-455, Ref:

control channel when the postulated dant control channel. Sheet #1 Appendix A-pages 6, 6C, failure occurs, the following 45 and 46. NOTE:

happens: Uors t case-I oss Ci"fS/P

-Loss of related operation of: (NOTE: Channel III operation is only signal to heaters.

(1) Block Auto Control of Group 21 partially available.)

and 22 Back-up Ilea ters.

(2) Speed Signal to Charging Pump.

CONTROL SYSTEM FAILURES Sheet 8

_TABLE U4 - LOSS OF POWER SOURCES SYSTEM: PRESSURIZER PRESSURE AND LEVEL CONTROL INS TRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels LT-461 Ch. I I I B If Channe 1 I I I is being used as the Channel I is available as the redund-(Cont'd) control channel when the postulated ant control channel except for Let-failure occurs the following down Isolation Valve CV277.

happens:

-Loss of related operation of:

(1) Block Auto Control and opera- (NOTE: Channel III operation is only tion of Group 21 and 22 Oack- partially available.)

up Ilea ters.

(2) Speed Signal to Charging Pump.

(3) Block Closed Letdown Isolation Valves CV 3, 4, 5 and 277.

c If Channel III is being used as the Channel II is available as the redund-control channel when the postulated dant control channel for Letdown Iso-failure occurs, the following lation Valves CV 3, 4, 5 and 277 and happens: Block operation of Group 21 and 22

-Loss of related operation of: Back-up Heaters.

(1) Block Auto Control and opera-tion of Group 21 and 22 Back-up lleaters.

(2) Speed Signal to Charging Pump.

(3) Block Closed Letdown Isolation Valves 2, 3, 4 and 5.

(4) Channel III operation.

D If Channel III is being used as the Channels I and II are available as re-control channel when the postulated dundant control channels for Letdown failure occurs, the following Isolation Valves CV 3, 4, 5 and 277 and happens: Block operation of Group 21 and 22

-Loss of related operation of: Back-up Heaters.

(1) Block Auto Control and opera-tion of Group 21 and 22 Back-up Heaters. (NOTE: Channel III operation is only (2) Speed Signal to Charging Pumps. partially available.)

(3) Block Closed Letdown Isolation Valves CV 2, 3, 4 and 5.

CONTROL SYSTEM FAILURES Sheet 9 TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEDWATER COIHROL - REACTOR COOLANT TEllPERATURE INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels TE-411A Ch. I A If Channel I is being used as the Channels II, III and IV are available These events Ref:

control channel when the postulated as redundant control channels, except are bounded by Appendix A-pages 1, 7, 7A, failure occurs, the following for related Steam Dump. the analyses 40, 44, 45 and 46.

happens: covering exces-

-Loss of related operation of: Loops #22, #23 and #24 remain operable. sive Heat Re-( 1) Channel I operation. moval due to (2) Auto Turbine Runback and Block Feedwater System Auto and Manual Rod Withdrawal. malfunction and/

(3) Rod Control. or Loss of Normal (4) Modulation of Feedwater Valves Feedwater.

(11 & 12 BF 19 &40).

(5) Steam Dump.

(6) Speed Signal to Charging Pump.*

(7) Block Auto Control of Group 21 and 22 Back-up Heaters.

B None Channels III and IV are available as redundant control channels.

Loops #21, #23 and #24 remain operable.

(NOTE~ Channel I is only partially available.)

c If Channe 1 I is being used as the Channels II and IV are redundant control control channel when the postulated channels for Auto Turbine Runback and failure occurs, the following Block Auto and Manual Rod llithdrawal.

happens: All Loops (#21, #22, #23 and #24) are

-Loss of related operation of: unavailable. *

(1) Rod Control.

(2) Modulation of Feed11ater Valves (NOTE: Channel I is only partially (11 & 12 BF 19 & 4D). available.)

(3) Steam Dump.

(4) Speed Signal to Charging Pump.

(5) Block Auto Control of Group 21 and 22 Back-up Heaters.

CONTROL SYSTEM FAILURES Sheet 10

.TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEDWATER CONTROL - 1\EACTOR COOLANT TEMPERATURE INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels TE-tlllA Ch. I D If Channel I is being used as the Channels II and III are available as (Cont'd) control channel when the postulated redundant control channels for Auto failure occurs, the following* Turbine Runback and Block Auto and happens: 11anual Rod Withdrawal, Modulation of

-Loss of related operation of: Feedwater Valves (11 & 12 BF 19 & 40)

(1) Rod Control. and related Steam Dump.

(2) Steam Dump.

(3) Speed Signal to Charging Pump. Loops #21, #22 and #23 remain operable.

(4) Block Auto Control of Group (NOTE: Channel I is only partially 21 and 22 Back-up Heaters. available.)

TE-411B Ch. I A If Channel I is being used as the Channels II, III and IV are available These events are Ref:

control channel when the postulated as redundant control channels. bounded by the Appendix A-pages 1, 7, failure occurs, the following analyses cover- 7A, 40, 44, 45 and 46.

happens: ing excessive

-Loss of related operation of the Heat Removal due Auto Turbine Runback and Block to Feedwater Auto and Manual Rod IJithdrawal. System malfunc-

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - tion and/or Loss B None Channels III and IV are available as of Normal Feed~*

redundant control channels. water.

Channel I remains operable.

c None Channels II and IV are available as redundant control channels.

Chaunel I remains operable.

D None Channels II and III are available as redundant control channels.

Channel I remains operable.

CONTROL SYSTEM FAILURES Sheet 11 TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEDWATER CONTROL - REACTOR COOLANT TEMPERATURE INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels TE-42IA Ch. II A If Channel II is being used as the Channels III and IV are available as See TE-411A, Ref:

control channel when the postulated redundant control channels, except Sheet #9 Appendix A-pages 2, 8, failure occurs, the following for related Steam Dump. SA, 41, 44, 45 and 46.

happens:

-Loss of related operation of Steam Loops #22, #23 and #24 remain operable.

Dump. (NOTE: Channel II is only partially available.)

B If Channel* II is being used as the Channels I, III and IV are available control channel when the postulated as redundant control channels.

failure occurs, the following happens: Loops #21, #23 and #24 remain operable.

-Loss of related operation of:

(I) Channel II operation.

(2) Auto Turbine Runback and Block Auto and Manual Rod Withdrawal.

(3) Rod Control.

(4) Modulation of Feedwater Valves (11 & 12 BF 19 & 40).

(5) Steam Dump.

(6) Speed Signal to Charging Pump.

(7) Block Auto Control of Group 21 and 22 Back-up lleaters.

c If Channel II is being used as the Channels I and IV are available as re-control channel when the postulated dundant control channels for Auto failure occurs, the following *Turbine Runback and Block Auto and happens: Manual Rod Withdrawal*.

-Loss of related operation of:

(1) Rod Control. All Loops (#21, #22, #23 and #24) are (2) Modulation of Feedwater Valves unavailable.

(11 & 12 BF 19 & 40). (NOTE: Channel II is only partially (3) Steam Dump. available.)

(4) Speed Signal to Charging Pump.

(5) Block Auto Control and Group 21 and 22 Back-up Ilea ters.

CONTROL SYSTEM FAILURES Sheet 12

.TABLE U4 - LO~S OF POWER SOURCES SYSTEM: FEEDWATER CONTROL - REACTOR COOLANT TEMPERATURE INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels TE-421A Ch. II D If Channel II is being used as the Channels I and Ill are available as control channel when the postulated redundant control channels for Auto failure occurs, the following Turbine Runback and Block Auto and happens: Manual Rod Withdrawal, Modulation of

-Loss of related operation of: Feedwater Valves (11 & 12 BF 19 & 40)

(1) Rod Control. and related Steam Dump.

(2) Steam Dump. Loops #21, #22 and #23 remain operable.

(3) Speed Signal to Charging Pump.

(4) Block Auto Control of Group (NOTE: Channel II is only partially 21 and 22 Back-up Heaters. available.)

TE-42IB Ch. II A None Channels Ill and IV are available as See TE-411A, Ref:

redundant control channels. Sheet #9 Appendix A-pages 2, 8, BA, 41, 44, 45 and 46.

Channel II remains operable.

B If Channel II is being used as the Channels I, Ill and IV are available as control channel when the postulated redundant control channels.

failure occurs, the following happens:

-Loss of related operation of the Auto Turbine Runback and Block Auto and 1-lanua l Rod fJithdrawa l.

c None Channels.I and.IV are available as re-dundant control channels.

Channel II remains operable.

D None Channels I and III are available as redundant control channels.

Channel II remains operable.

CONTROL SYSTEM FAILURES Sheet 13

_TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEDWATER CONTROL - REACTOR COOLANT TEMPERATURE INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels TE-431A Ch. III A If Channel III is being used as the Channels II and IV are available as See TE-411A,' Ref:

control channel when the postulated redundant control channels, except for Sheet #9 Appendix A-pages 3, 9, failure occurs, the follm*1ing Steam Dump.

• 9A, 4 2, 44 , 45 and 46.

happens: Loops #22, #23 and #24 remain operable.

-Loss of related operation of Steam Dump. (NOTE: Channel III is only partially available.)

B None Channels I and IV are available as redundant control channels.

Loops #21, #23 and #24 . .remain operable.

(NOTE: Channel III is only partially available.)

c If Channel III is being used as the Channels I, II and Ill are available as control channel when the postulated redundant control channels for Auto failure occurs, the following Turbine Runback and Block Auto and happens: Manual Rod Withdrawal.

-Loss of related operation of: All Loops (#21, #22, #23 and #24) are (1) Channel Ill operation. unavailable.

(2) Auto Turbine Runback and Block Auto and Manual Rod Withdra~ia l.

(3) Rod Control.

(4) Speed Signal to Charging Pump.

( 5) Steam Dump.

(6) Modulation of Feedwater Valves (11 & 12 BF 19 & 40).

(7) Block Auto Control of Group 21 & 22 Back-up Heaters.

CONTROL SYSTEM FAILURES Sheet 14

.TABLE H4 - LOSS OF POWER SOURCES SYSTEM: FEEDWATER CONTROL - REACTOR COOLANT TEMPERATURE INSTRUMEtlTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels TE-431A Ch. I II D If Channel Ill is being used as the Channels I and II are available as control channel when the postulated redundant control channels for re-failure occurs, the following lated Steam Dump, to modulate feed-happens: *water Valves (11 & 12 BF 19 & 40),

-Loss of related operation of: and Auto Turbine Runback and Block (1) Rod Control. Auto and Manual Rod l'li thdrawa l.

(2) Steam Dump. Loops #21, 1122 and #23 remain operable.

(3) Speed Signal to Charging Pump.

(4) Block Auto Control of Group (NOTE: Channel III is partially 21 and 22 Back-up Heaters available.)

TE-4316 Ch. III A None Channels II and IV are available as See TE-411A, Ref:

redundant control channels. Sheet #9 Appendix A-pages 3, 9, Channel III remains operable. 9A, 42, 44, 45 and 46.

B None Channels I and IV are available as redundant control channels.

Channel Ill remains* operable.

c If Channel III is being used as the Channels I, 11* and IV are available as control channel when the postulated redundant control channels.

failure occurs, the follm~ing happens:

-Loss of related operation of the Auto Turbine Runback and Block Auto and Manual Rod Withdrawal.

D None Channels I and II are available as re-dundant control channels.

Channel Ill remains operable.

CONTROL SYSTEM FAILURES Sheet 15

• TABLE 04 - LOSS OF POWER SOURCES SYSTEM: FEEDWATER CONTROL - REACTOR COOLANT TEMPERATURE INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT . REMARKS (Loss)

Channels TE-*141A Ch. IV A If Channel IV is being used as th,e Channels II and III are available as See TE-411A, Ref:

control channel when the postulated redundant control channels, except Sheet #9 Appendix A-pages 4, 10, failure occurs, the following for related Steam Dump. lOA, 43, 44, 45 and 46.

happens: Loops #22, #23 and #24 remain operable.

-Loss of related operation of Steam Dump. (NOTE: Channel IV is only partially available.)

B None Channels I and III are available as redundant control channels.

Loops #21, #23 and #24 remain operable.

(NOTE: Channel IV is only partially available.)

c . If Channel IV is being used as the Channels I and II are available as re-control channel when the postulated dundant control channels for Auto failure occurs, the following Tur*bi ne Runback and Block Auto and happens: 11anua l Rod llithdrawa l.

-Loss of related operation of: A11 Loops ( #21, #22, #23 and #24) are (1) Rod Control. unavailable.

(2) Modulation of Feedwater Valves

. (11 & 12 BF 19 & 4D). (NOTE: Channel IV is only partially

( 3) Steam Dump. available.

(4) Speed Signal to Charging Pump.

(5) Block Auto Control of Group 21 and 22 Back-up Heaters.

CONTROL SYSTEM FAILURES Sheet 16 TABLE 04 - LOSS OF POWER SOURCES SYSTEM: FEEDWATER CONTROL - REACTOR COOLANT TEMPERATURE

. INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels TE-441A Ch. IV D If Channel IV is being used as the Channels I, II and III are available control channel when the postulated as redundant control channels for Auto failure occurs, the following Turbine Runback and Block Auto and happens: Manual Rod Withdrawal and to Modulate

-Loss of related operation of: Feedwater Valves (11 & 12 BF 19 & 40).

(1) Channel IV operation.

(2) Auto Turbine Runback and Block Loops #21, #22 and #23 remain avail-.

Auto and Manual Rod Withdrawal. able.

(3) Rod Control.

(4) Modulation of Feedwater Valves (11 & 12 BF 19 & 40).

( 5) Steam Dump.

(6) Speed Signal to Charging Pump.

(7) Block Auto Control of Group 21 and 22 Back-up Heaters.

TE-4418 Ch. IV A None Channels II and III are available as See TE-411A, Ref:

redundant control channels. Sheet 9 Appendix.A-pages 4, 10,

hanne l IV remains operable. lOA, 43, 44, 45 and 46.

B None Channels I and Ill are available as redundant control channels.

Channel IV remains operable.

C None Channels I and II are available as redundant control channels.

Channel IV remains operable.

D If Channel IV is being used as the Channels I, II and III are available as control channel when the postulated redundant control channels.

failure occurs, the following happens:

-Loss of related operation of the Auto Turbine Runback and Block Auto and Manual Rod IH thdrawa l.

CONTROL SYSTEM FAILURES Sheet 17 TABLE H4 - LOSS OF POWER SOURCES SYSTEM: FEEDWATER CONTROL - STEAM GENERATOR, FEEDWATER FLOW/STEAM FLOW INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG#21 Channels FT-510 Ch. I A If Channel I is being used as the These events Ref:

control channel when the postulated a ri> bounded by Appendix A-pages 11, llA, failure occurs, the following In Steam Generators #21, #22, #23 and the analysis 13, 27 and 31.

happens: #24 all other level protection remains covering Exces-

-Loss of related operation of: operable. sive Heat Re-(1) Channel I operation. moval due to (2) Feedwater Control Valve Feedwater System (21 BF 19). malfunction.

B If Channel I is being used as the control channel when the postulated

,failure occurs, the following In Steam Generators #21, #22, #23 and happens: #24 all other level protection remains

-Loss of related operation of Feed- operable.

water Control Valve (21 BF 19).

(NOTE: Channel I is only partially available.)

C, 0 If Channel I is being used as the Steam Generators #21, #22, #23 and #24 control channel when the postulated le*vel protection remains failure occurs, the following available.

happens: tlOTE:

-Loss of related operation of Feed- (1) Channel I is only partially avail-water Control Valve (21 BF 19). able.

(2) Part of all other Steam Generators' level protection is unavailable (each bus implies different avail-able level protection).

CONTROL SYSTEM FAILURES Sheet 18

. TABLE 04 - LOSS OF POWER SOURCES SYSTEM: FEEDWATER CONTROL - STEAM GENERATOR, FEEDWATER FLOW/STEAM FLOW INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG #21 Channels FT-511 Ch. II A If Channel II is being used as the Steam Generators #21 and #24 control See FT-510, Ref:

control channel when the postulated and level protection remains operable. Sheet #17 Appendix A-pages 12, 12A, failure occurs, the following In Steam Generators #21, #22, #23 and 13, 27 and 31.

happens: #24, all other level protection remains

-Loss of related operation of Feed- operable.

water Control Valve (21 BF 19).

(NOTE: Channel II is only partially available.)

B If Channel II ls being used as the Steam Generators #22 *and *#23 control.

control channel when the postulated and level protection remains operable.

failure occurs, the following In Steam Generators #21, #22, #23 and happens: #24, all other level protection remains

-Loss of related operation of: operable.

(1) Channel II operation.

(2) Feedwater Control Valve (21 BF 19).

C, D If Channel II is being used as the Steam Generators #21, #22, #23 and #24 control channel when the postulated level protection remains failure occurs, the following operable.

happens: NOTE:

-Loss of related operation of Feed- (1) Channel II is only partially avail-water Control Valve (21 BF 19). able.

(2) Part of all other Steam Generators' level protection is unavailable (each bus implies different avail-able level protection).

CONTROL SYSTEM FAILURES Sheet 19

.TABLE 114 - LOSS OF POWER SOURCES SYSTEM: FEEDWATER CONTROL - STEAM GENERATOR, FEEDWATER FLOl.J/STEAM FLOl4 INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG #21 Channels FT-512 Ch. I A If Channel I is being used as the Steam Genera tors #21 and #24 control These events Ref:

control channel when the postulated and level protection remains operable. are bounded by Appendix A-pages 11, 118, failure occurs, the following In Steam Generators #21, #22, #23 and the a~alysis 13, 23, 27 and 31.

happens: #24, all other level protection remains E~veri~gNthe

-Loss of related operation of: operable. ss o onna 1 (1) Channel I operation. Feedwater.

(2) Feed Pumps and Turbine Speed Channel II is available for redundant Control. control of Feed Pumps and Turbine Speed (3) Feedwater Control Valve Control.

(21 BF 19).

B If Channel I is being used as the Steam Generators* #22 and #23 control control channel when the postulated and level protection remains operable.

failure occurs, the following In Steam Generators #21, #22, #23 and happens: #24, all other level protection remains

-Loss of related operation of Feed- operable.

water Control Valve (21 BF 19).

(NOTE: Channel I is only partially available.)

C, D If Channel I is being used as the Steam Generators #21, #22, #23 and #24 control channel when the postulated level protection remains failure occurs, the following available.

happens: flOTE:

-Loss of related operation Feed- (1) Channel I is only partially avail-water Control Valve (21 BF 19). able.

(2) Part of all other Steam Generators 1 level protection is unavailable (each bus implies different level protection).

CONTROL SYSTEM FAILURES Sheet 20

_TABLE 04 - LOSS OF POWER SOURCES SYSTEM: FEEm-JATER CONTROL - STEAM GENERATOR, FEEDWATER FLOW/STEAM FLOll INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (loss)

Channels SG #21 FT-513 Ch. II A If Channel II is being used as the In Steam Generators #21, #22, #23 and See FT-512, Ref:

control channel when the postulated #24, all other level protection remains Sheet #19 Appendix A-pages 12, 12B, failure occurs, the following operable. 13, 24, 27, 31 and 32.

happens: (NOTE: Channel II operation is only

-Loss of related operation of Feed- partially available.)

water Control Valve (21 BF 19).

B If Channel II is being used as the In Steam Generators #21, #22, #23 and control channel when the postulated #24, all other level protection remains fa i1 ure occurs, the fo 11 o~li ng operable.

nappens: Channel I is available for redundant

-Loss of related operation of: control of Feed Pumps and Turbine Speed (1) Channel II operation. Control.

(2) Feed Pumps and Turbine Speed Control.

(3) Feedwater Control Valve (21 BF 19).

C, D If Channel II is being used when Steam Generators #21, #22, #23 and #24 the postulated failure occurs, the level *protection remains operable.

following happens: NOTE:

-Loss of related operation of Feed- (1) Channel II is only partially avail-water Control Valve (21 BF 19).

(2) ~~~~*of all other Steam Generators 1 level protection is unavailable (each bus implies different avail-able level proteGtion.)

CONTROL SYSTEM FAILURES Sheet 21

.TABLE 04 - LOSS OF POWER SOURCES SYSTEM: FEEOWATER CONTROL - STEAM GENERATOR, FEEDWATER FLOH/STEAM FLOW INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG #22 Channels FT-520 Ch. I A If Channel I is being used as the Steam Generators #21 and #24 control See FT-510, Ref:

control channel when the postulated and level protection remains operable. Sheet #17 Appendix A-pages 14, 14A, failure occurs, the following In Steam Generators #21, #22, #23 and 16, 28, and 31.

happens: #24, all other level protection remains

-Loss of related operation of: operable.

(1) Channel I operation.

(2) Feedwater Control Valve (22 BF 19).

B None Steam Generators #22 and #23 control and level protection remains operable.

In Steam Generators #21, #22, #23 and

1. 24, all other level protection remains operable.

(NOTE: Channel I operation is available.)

C, D If Channel I is being used as the Steam Generators #21, #22, #23 and #24 control channel when the postulated control and level protection remains failure occurs, the following operable.

happens: NOTE:

-Loss of related operation of Feed- (1) Channel I is only partially avail-water Control Valve (22 BF 19). able.

(2) Part of all other Steam Generators' level protection is unavailable (each bus implies different avail-able level protection).

CONTROL SYSTEM FAILURES Sheet 22

.TABLE 04 - LOSS OF POWER SOURCES SYSTEM: FEEm~ATER CONTROL - STEAM GENERATOR, FEEDWATER FLOW/STEAM FLOH INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss}

SG #22 Channels FT-521 Ch. II A If Channel II is being used as the Steam Generators #21 and #24 control See FT-510, Ref:

control channel when the postulated and level protection remains operable. Sheet #17 Appendix A-pages 15, 15A, failure occurs, the following 16, 28, and 31.

happens: In Steam Generators #21, #22, #23 and

-Loss of related operation of Feed- #24, all other level protection remains water Control Valve (22 BF 19). operable.

(NOTE: Channel II is only partially available.)

B If Channel II is being used as the Steam Generators #22 and #23 control control channel when the postulated and level protection remains operable.

failure occurs, the following In Steam Generators #21, #22, #23 and happens: #24, all other level protection remains

-Loss of related operation of: operable.

(1) Channel II operation.

(2) Feedwater Control Valve Channel :r is available as the redun-(22 BF 19). dant control channel.

C, D If Channel II is being used as the Steam Generators #21, #22, 923 and #24 control channel when the postulated level protection remains failure occurs, the following operable.

happens: NOTE:

-Loss of related operation of Feed- (1) Channel II is only partially avail-water Control Valve (22 BF 19).- able.

(2) Part of all the Steam Generators' level protection is unavailable (each bus implies different avail-able level protection).

CONTROL SYSTEM FAILURES Sheet 23 TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEDl~ATER COflTROL - STEAM GENERATOR, FEEDWATER FLOW/STEAM FLOW INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG #22 Channels FT-522 Ch. I A If Channel I is belng used as the Steam Generators #21 and #24 control See FT-512, Ref:

control channel when the postulated and level protection remains operable. Sheet #19 Appendix A-pages 14, 148, failure occurs, the following 16, 23, 28, and 31.

happens: In Steam Generators #21, #22, #23 and

-Loss of related operation of: #24, all other level protection remains (ll Channel I operation. operable.

(2 Feed Pumps and Turbine Speed Channel II is available as the redun-Control. dant control channel for Feed Pumps (3) Feedwater Control Valve and Turbine Speed Control.

(22 BF 19).

B None Steam Generators.#22 and #23 control and level protection remains operable.

In Steam Generators #21, #22, #23 and

1. 24, all other level protection remains operable.

(HOTE: Channel I remains operable.)

C, D If Channel I is being used as the Steam Generators #21, #22, #23 and #24 control channel when the postulated level protection remains failure occurs, the following operable.

happens: tlOTE:

-Loss of related operation of Feed- (I) Channel I is only partially avail-water Control Valve (22 BF 19). able.

(2) Part of all other Steam Generators' level protection is unavailable (each bus implies different level protection).

CONTROL SYSTEM FAILURES Sheet 24 TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEDWATER CONTROL - STEAM GENERATOR, FEEDHATER FLOlUSTEAM FLOW INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG #22 Channels FT-523 Ch. I I A If Channel II is being used as the Steam Generators #21 and #24 control See FT-512, Ref:

control channel when the postulated and level protection remains operable. Sheet #19 Appendix A-pages 15, 15B, failure occurs, the following In Steam Generators #21, #22, #23 and 16, 25, 28, 31, and 32.

happens: #24, all other level protection remains

-Loss of related operation of Feed- operable.

water Control Valve (22 BF 19).

(NOTE: Channel II is only partially available.)

B If Channel II is being used as the Steam Generators #22 and #23 control control channel when the postulated and level protection remains operable.

failure occurs, the following In Steam Generators #21, #22, #23 and happens:

-Loss of related operation of: #24, all other level protection remains (1) Channel II operation. operable.

(2) Feed Pumps and Turbine Speed Channel I is available as the redundant Control. control channel.

(3) Feedwater Control Valve (22 BF 19).

C, D If Channel II is being used as the Steam Generators #21, #22, #23 and #24 control channel when the postulated level protection remains failure occurs, the follm~ing operable.

happens: NOTE:

-Loss of related operation of Feed- (1) Channel II is only partially avail-water Control Valve (22 BF 19). able.

(2) Part of all the Steam Generators'.

level protection* is unavailable (each bus implies different avail-able level protection).

CONTROL SYSTEM FAILURES Sheet 25

.TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEDWATER CONTROL - STEAM GENERATOR, FEEDWATER FLOfl/STEAM FLOU INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG #23 Channels FT-530 Ch. I A If* Channel I is being used as the Steam Generators #21 and #24 control See FT-510, Ref:

control channel when the postulated and level protection remains operable. Sheet #17 Appendix A-pages 17, 17A, failure occurs, the following In Steam Generators #21, #22, 1123 and 19, 29, and 31.

happens: #24, all other level protection remains

-Loss of related operation of: operable.

(1) Channel I operation.

(2) Feedwater Control Valve (23 BF 19).

B None Steam Generators #22 and #23 control and level protection remains operable.

In Steam Generators #21, 022, ~23 and

1. 24, all other level protection remains operable.

(NOTE: Channel I operation is available.)

c None Steam Generators #21, #22, #23 and #24 level protection remains operable.

NOTE:

(1) Channel I remains operable.

(2) Part of all other Steam Generators' level protection is unavailable.

(3) Channel II is available as the re-dundant contro 1 channe 1. .

D If Channel I is being used as the Steam Generators #21, #22, #23 and #24 control channel when the postulated level protection remains failure occurs, the following operable, happens: NOTE:

-Loss of related operation of Feed- (1) Channel I is only partially avail-water Control Valve {23 BF 19). able.

(2) Part of all other Steam Generators' level protection is unavailable.

CONTROL SYSTEM FAILURES Sheet 26 TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEDl~ATER CONTROL - STEAM GENERATOR, FEEDl~ATER FLOW/STEAM FLOW INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels Ch. JI A If Channel Iris being used as the Steam Generators #21 and #24 control See FT-510, Ref:

control channel 1~hen the postulated and level protection remains operable. Sheet #17 Appendix A-pages lB, IBA, failure occurs, the following In Steam Generators #21, #22, #23, and 19, 29, and 31.

happens: . #24, all other level protection remain

-Loss of related operation of Feed- operable.

water Con'trol Valve (23 BF 19).

(NOTE: Channel II is only partially available.)

B If Channel II is being used as the Steam Generators #22 and #23 control control channel when the postulated and level protection remains operable.

failure occurs, the following In Steam Generators #21, #22, #23 and happens:

-Loss of related operation of: #24, all other level protection remains (1) Channel II operation. operable.

(2) Feedwater Control Valve Channel I is available as the redundant (23 BF 19). control channel.

c None Steam Generators #21, #22, #23 and # 24 level protection remains operable.

NOTE:

(1) Channel II remains operable.

(2) Channel I is available as the re-dundant control channel.

(3) Part of all other Steam Generators' level protection in unavailable.

D If Channel:II:is being used as the Steam Generators #21, #22, #23 and #24 control channel when the postulated level protection remains failure occurs, the following operable.

happens: NOTE:

-Loss of related operation of Feed- (1) Channel JI is only partially water Control Valve (23 BF 19). available.

(2) Part of all other Steam Generators 1 level protection is unavailable.

CONTROL SYSTEM FAILURES Sheet 27 TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEDWATER CONTROL - STEAM GENERATOR, FEEDWATER FLOH/STEl\M FLOfl INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG #23 Channels fT-532 Ch. I A If Channel I is being used as the Steam Generators #21 and #24 control See FT-512, Ref:

control channel when the postulated and level protection remains operable. Sheet #19 Appendix A-pages 17, 17B, fa i1 ure occurs, the fo 11 owing In Steam Generators #21, #22, #23 and 19, 26, 29, and 31.

happens: #24, all other level protection remains

-Loss of related operation of: operable.

(1) Channel I operation.

(2) Feed Pumps and Turbine Speed Channel II is available as the redun-Control. dant control channel for Feed Pumps (3) Feedwater Control Valve and Turbine Speed Control.

(23 BF 19).

B None Steam Generators #22 and #23 control and level protection remains operable.

In Steam Generators #21, #22, #23 and

1. 24, all other level protection remains operable.

(NOTE: Channel I remains operable.)

c None Steam Generators #21, #22, #23 and #24 level protection remains operable.

NOTE:

( 1) Channel I remains operable. 1 (2) Part of all other Steam Generators level protection is unavailable.

D If Channel I is being used as the Steam Generators #21, '122, #23 and #24 control channel when the postulated level protection remains failure occurs, the following operable.

happens: NOTE:

-Loss of related operation of Feed- (1) Channel I is only partially water Control Valve (23 BF 19). available.

(2) Part of all other Steam Generators1 level protection is unavailable.

CONTROL SYSTEM FAILURES Sheet 28

.TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEDl~ATER CONTROL - STEAM GENERATOR, FEEDl-IATER FLOW/STEAM FLOU INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG 1123 Channels FT-533 Ch. II A If Channel I I is being used as the Steam Generators #21 and #24 control See FT-512, Ref:

control channel when the postulated and level protection remains operable. "heet #19 1\jipendix A-pages 18, 188, failure occurs, the following In Steam Generators #21, #22, 1123 and 19, 24, 29, 31, and 32.

happens: #24, all other level protection remains

-Loss of related operation of Feed- operable.

• water Control Valve (23 BF 19).

(NOTE: Channel II is only partially available.)

B If Channel II is being used as the Steam Generators #22 and #23 control control channel when the postulated and level protection remains operable.

failure occurs, the following In Steam Generators #21, #22, #23 and happens: #24, all other level protection remains

-Loss of related operation of: operable.

(1) Channel II operation.

(2) Feed Pumps and Turbine Speed Channel I is available as the redundant Contra l. control channel.

(3) Feedwater Control Valves (23 BF 19).

c None Steam Generators #21, #22, #23 and #24 level protection remains operable.

NOTE:

(1) Channel II remains operable.

(2) Channel I is available as the re-dundant control channel.

(3) Part of all other Steam Generators 1 level protection is unavailable.

D If Channel II is being used as the Steam Generators #21, #22, 1123 and #24 control channel when the postulated level protection remains failure occurs, the following operable.

happens: NOTE:

-Loss of related operation of Feed- (1) Channel II is only partially water Control Valve (23 BF 19). available.

(2) Part of all other Steam Generators' level protection is unavailable.

CONTROL SYSTEM FAILURES Sheet 29 TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEDl-JATER CONTROL - STEAM GENERATORS, FEEDHATER FLOW/STEAtl FLOH INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG #24 Channels FT-540 Ch. I A If Channel I is being used as the Steam Generators #21 and #24 control See FT-510, Ref:

control channel when the postulated and level protection remains operable. Sheet #17 Appendix A-pages 20, 20A, failure occurs, the following In Steam Generators #21, #22, #23 and 22, 30 and 31.

happens: #24, all other level protection remains

-Loss of related operation of: .operable.

(1) Channel I operation.

(2) Feedwater Control Valve (24 BF 19).

B If Channel I is being used as the Steam Generators #22 and #23 control control channel when the postulated and level protection remains operable.

failure occurs, the following In Steam Generators #21, #22, #23 and happens: #24, all other level protection remains

-Loss of related operation of Feed- operable.

water Control Valve (24 BF 19).

(NOTE: Channel is only partially available.)

c None Steam Generators #21, #22, #23 and #24 level protection remains operable.

NOTE:

(1) Channel I remains operable.

(2) Part of all other Steam Generators' level protection is unavailable.

D If Channel I is being used as the Steam Generators #21, #22, 923 and #24 control channel when the postulated level protection remains failure occurs, the following operable.

happens: NOTE:

-Loss of related operation of Feed- (1) Channel I is only partially water Control Valve (24 BF 19). available.

(2) Part of all other Steam Generators 1 level protection is unavailable.

I

CONTROL SYSTEM FAILURES Sheet 30

_TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEDHATER CONTROL - STEAM GENERATORS, FEEDllATER FLOIUSTEAM FLO:-/

INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG #24 Channels FT-541 Ch. II A If Channel II is being used as the Steam Generators #21 and #24 control See FT-510, Ref:

control channel when the postulated and level protection remains operable. Sheet #17 Appendix A-pages 21, 21A, failure occurs, the following In Stearn Generators #21, #22, #23 and 22, and 31.

happens: #24, all other level protection rearnins

-Loss of related operation of Feed- operable.

water Control Valve (24 BF 19).

(NOTE: Channel II is only partially available.)

B If Channel II is being used as the Steam Generators #22 and #23 control control channel when the postulated and level protection remains operable.

failure occurs, the following In Steam Generators #21, #22, #23 and happens: #24, all other level protection remains

-Loss of related operation of: operable.

(1) Channel II operation.

(2) Feedwater Control Valve (24 BF 19).

c None Steam Generators #21, #22, #23 and #24 level protection remains operable *.

NOTE:

(1) Channel II remains operable.

(2) Part of all other Steam Generators'

• level protection is unavailable.

D If Channel II is being used as the Steam Generators #21. #22, #23 and #24 control channel when the postulated level protection remains failure occurs, the following operable:

happens: NOTE:

-Loss of related operation of Feed- (1) Channel II is only partially available.

water Control Valve (24 BF 19). ( 2) Pa rt of a11 other Steam Genera tors 1 level protection is unavailable.

CONTROL SYSTEM FAILURES Sheet 31

.TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEDVJATER CONTROL - STEAM GENERATOR, FEEDl~ATER FLOW/STEAM FLOW INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG #24 Channels FT-542 Ch. I A If Channel I is being used as the Steam Generators #21 and #24 control See FT-512, Ref:

control channel when the postulated and level protection remains operable. Sheet #19 Appendix A-pages 20, 208, failure occurs, the following 22, 26, and 31.

happens: In Steam Generators #21, #22, #23 and

-Loss of related operation of: #24, all other level protection remains (1) Channel I operation. operable.

(2) Feed Pumps and Turbine Speed Control.

(3) Feedwater Control Valve (24 BF 19).

B If Channel I is being used as the Steam Generators #22 and #23 control control channel when the postulated and level protection remains operable.

failure occurs, the following happens: In Steam Generators #21, #22, #23 and

-Loss of related operation of Feed- #24, all other level protection remains water Control Valve (24 BF 19). operable.

(NOTE: Channel I is. only partially available.)

c None Steam Generators #21, #22, #23 and #24 level protection remains available.

flOTE:

(1) Channel I remai11s operable.

(2) Part of all other Steam Generators' level protection is available.

(3) Channel II is available as the re-dundant control channel.

D If Channel I is being used as the Steam Generators #21, #22, ..'.'23 and #24 control channel when the postulated level protection remains failure occurs, the fallowing available.

happens: llOTE:

-Loss of related operation of Feed- (1) Channel I is only partially water Control Valve (24 BF 19). available.

(2) Part of all other Steam Generators'

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

level protection is unavailable.

CONTROL SYSTEM FAILURES Sheet 32

.TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEm~ATER CONTROL - STEAM GENERATOR, FEEDHATER FLOIUSTEAl1 FLOfJ INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG #24 Channels FT-543 Ch. II A If Channel If is being used as the Steam Generators #21 and #24 control See FT-512, Ref:

control channel when the postulated and level protection remains operable. Sheet #19 Appendix A-pages 21, 21B, failure occurs, the following In Steam Generators #21, #22, #23 and

• 22, 25, 30, and 32.

happens: #24, all other level protection remains

-Loss of related operation of Feed- operable.

water Control Valve (24 BF 19).

B If Channel II is being used as the Steam Generators #22 and #23 control control channel when the postulated and level protection remains operable.

failure occurs, the following In Steam Generators #21, #22, #23 and happens: f.124, all other level protection remains

-Loss of related operation of: operable.

(1) Channel II operation.

(2) Feed Pumps and Turbine Speed *Channel I is available for redundant Control. control of Feed Pumps and Turbine Speed (3) Feedwater Control Valve Control.

(24 BF 19).

c None Steam Generators #21, #22, #23 and #24 level protection remains operable.

NOTE:

(1) Channel II remains operable. 1

( 2) Part of a 11 other Steam Genera tors level protection is unavailable.

D If Channel II is being used as the Steam Generators #21, #22, #23 and #24 control channel when the postulated level protection remains failure occurs, the following operable.

happens: NOTE:

-Loss of related operation of Feed- (1) Channel II is only partially water Control Valve (24 BF 19). available.

(2) Part of all other Steam Generators 1 level protection is unavailable.

CONTROL SYSTEM FAILURES Sheet 33

. TABLE U4 - LOSS OF POWER SOURCES SYSTEM: FEEmlATER CONTROL - STEAM GENERATOR, STEAM PRESSURE INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels PT-514 Ch. I A If Channel I is being used as the Channel II is available for redundant These events "are Ref:

control channel when the postulated control of Feed Pumps and Turbine bou11tled by the Aopendix A-pages 11, 13, failure occurs, the following Speed Control. ana lys 1s cover- 23, 23A, 27, and 31.

happens: Also see FT-512, Sheet #19. ing the Loss of

-Loss of related operation of: Nonna] Feedwater.

(1) Channel I operation.

(2) Feed Pumps and Turbine Speed Control.

(3) Feedwater Control Valve (21 BF 19).

B If Channel I is being used as the Channel I remains available except for control channel when the postulated operation of Feedwater Control Valve failure occurs, the following (21 BF 19).

happens: Also see FT-512, Sheet #19.

-Loss of related operation of Feed-water Control Valve (21 BF 19).

C, D If Channel I is being used as the Channels I and II are only partially control channel when the postulated avail.able for .control operation.

failure occurs, the following Also see FT-Gl2, Sheet #19.

happens:

-Loss of related operation of Feed-

~iater Control Valve (21 BF 19).

,.J

CONTROL SYSTEM FAILURES Sheet 34

_TABLE 04 - LOSS OF POWER SOURCES SYSTEM: FEED:.IATER CONTROL - STEAM GENERATOR, STEAM PRESSURE INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels PT-515 Ch. II A If Channel II is being used as the Channel II is available for control of See PT-514,

• Ref:

control channel when the postulated Feed Pumps and Turbine Speed Control. Sheet #33 Appendix A-pages 12, 13, failure occurs, the following Also see FT-513, '.;heet #20 24, 24A, 27, 31, and 32..

happens:

-Loss of related operation of Feed-water Control Valve (21 BF 19).

B If Channel II is being ~sed as the Channel I is available as redundant control channel when the postulated control for Feed Pumps and Turbine failure occurs, the following Speed Control.

happens:

-Loss of related operation of: Also see FT-513, Sheet #20.

(1) Channel II operation.

(2) Feed Pumps and Turbine Speed Control.

(3) Feedwater Control Valve (21 BF 19).

C, D If Channel II is being used as the Channel I and II are available for control channel when the postulated con tf'.O 1 of Fef!d Pumps and Turbine failure occurs, the following Speed Control.

happens: Also see FT-513, Sheet #20.

-Loss of related operation of Feed-water Control Valve (21 BF 19).

CONTROL SYSTEM FAILURES Sheet 35

.TABLE H4 - LOSS OF POWER SOURCES SYSTEM: FEEm~ATER CONTROL - STEAM GENERATOR, STEAM PRESSURE INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels *I PT-524 Ch. I A If Channel I is being used as the Channel II is available as redundan~ See PT-514, Ref:

control channel when the postulated control of Feed Pumps and Turbine Sheet #33 Appendix A-~ages 14, 16, failure occurs, the following Speed Control. 23, 238, 28, and 31.

happens:

-Loss of related operation of: Also see FT-522, Sheet #23.

(1) Channel I operation.

(2) Feed Pumps and Turbine Speed Control.

(3) Feedwater Control Valve (22 BF 19).

B None Channel I remains operable.

Also see FT-522, Sheet #23.

C, D* If Channel I is being used as the Channels I and II remain operable for control channel when the postulated control of Feed Pumps and Turbine fa i1 ure occurs, the fo 11 o~ii ng Speed Contra 1.

happens:

-Loss of related operation of Feed- Also see FT-522, Sheet #23.

water Control Valve (22 BF 19).

CONTROL SYSTEM FAILURES Sheet 36 TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEDflATER CONTROL - STEAM GEllERATOR, STEA11 PRESSURE INSTRUMENTS VITAL BUS

• EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels PT-525 Ch. I I A If Channel II is being used as the Channel II is only partially available. Si:e PT-514," Ref:

control channel when the postulated Sheet #33 ~ppendix A-pages 15, 16, failure occurs, the following Also see FT-523, Sheet #24.

25, 25A, 28, 31, and 32.

happens:

-Loss of related operation of Feed-water Control Valve (22 BF 19).

B If Channel II is being used as the Channel I is available as the redundant control channel when the postulated control channel.

failure occurs, the following happens: Also see FT-523, Sheet #24.

-Loss of rela.ted operation of:

(1) Channel II operation.

(2) Feed Pumps and Turbine Speed Control.

(3) Feed~1ater Control Valve (22 BF 19).

C, D If Channel II is being used.as the Channels I and II are available for control channel when the postulated control of Feed Pumps and Turbine failure occurs, the follm1ing Speed Control.

happens:

.~lso see FT-'i23, Sheet #24.

-Loss of related operation of Feed-water Control Valve (22 BF 19).

CONTROL SYSTEM FAILURES Sheet 37 TABLE H4 - LOSS OF POWER SOURCES SYSTEM: FEEDl~ATER CONTROL - STEAM GENERATOR, STEAM PRESSURE INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels PT-534 Ch. I A If Channel I is being used as the Channel II is available as redundant See PT-514; Ref:

control channel when the postulated control for Feed Pumps and Turbine Sheet #33 Appendix A-pages 17, 19, failure occurs, the following Speed Control. 26, 26A, 29, and 31.

happens: Also see FT-532, Sheet #27.

-Loss of related operation of:

(1) Channel I operation.

(2) Feed Pumps and Turbine Speed Control.

(3) Feedwater Control Valve (23 BF 19).

B, .C None Channel I remains operable.

Also see FT-532, Sheet #27.

o. If Channel I is being used as the Channels I and II remain operable for control channel when the postulated control of Feed Pumps and Turbine Speed failure occurs, the following Control.

happens: Also see FT-532, Sheet #27.

-Loss of related operation of Feed-water Control Valve (23 BF 19).

CONTROL SYSTEM FAILURES Sheet 38 TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEDWATER CONTROL - STEAM GENERATOR, STEAM PRESSURE INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REOUNOANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels PT-535 Ch. II A If Channel II is being used as the Channel II is only partially available. See PT-514, Ref:

control channel when the postulated Sheet #3~ Appendix A-pages 18, 19, failure occurs, the following Also see FT-333, Sheet #28.

happens: 24, 24B, 29, 31, and 32.

-Loss of related operation of Feed-water Control Valve (23 BF 19).

B If Channel II is being used as the Channel I is available as redundant control channel when the postulated control for Feed Pumps and Turbine failure occurs, the following Speed Contra l.

happens:

-Loss of related operation of: Also see FT-533, Sheet #28.

(1) Channel II operation.

(2) Feed Pumps and Turbine Speed Control.

(3) Feedwater Control Valve (23 BF 19).

c None Channel I is available as the redundant control

. channel.

Also see FT-533, Sheet #28.

D If Channel II is being used as the Channel I and II are available for control channel when the postulated control of Feed Pumps and Turbine failure occurs, the following Speed Control.

happens:

-Loss of related operation of Feed- Also see FT-533, Sheet #28.

water Control Valve (23 BF 19).

CONTROL SYSTEM FAILURES Sheet 39

. TABLE #4 - LOSS OF POWER SOURCES SYSTLM: FEEDliATER CONTROL - STEAM GENERATOR, STEAM PRESSURE INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT (Loss) REMARKS Channels PT-544 Ch. I A If Channel I is being used as the Channel II is available as redundant See PT-514~ Ref:

control channel when the postulated control for Feed Pumps and Turbine Sheet #33 Appendix A-pages 20, 22, failure occurs, the following Speed Control. 26, 26B, 30, and 31.

happens:

-Loss of related operation of: Also see FT-342, Sheet #31.

(1) Channel I operation.

(2) Feed Pumps and Turbine Speed Control.

(3) Feedwater Control Valve (24 BF 19).

B If Channel I is being used as the Channel I is only partially available.

control channel when the postulated failure occurs, the following Also see FT-542, Sheet #31.

happens:

-Loss of related operation of Feed-water Control Valve (24 BF 19).

c None Channel II is available as the redun-dant control channel.

Also see FT-542, Sheet #31.

D If Channel I is being used as the Chann2l II is avail~ble as the redunant control channel when the postulated control of Feed Pumps and Turbine Speed failure occurs, the following Centro l.

happens:

-Loss of related operation of Feed- Also see FT-542, Sheet #31.

water Control Valve (24 BF 19).

CONTROL SYSTEM FAILURES Sheet 40

. TABLE #4 - 1.0SS OF POWER SOURCES SYSTl.H: FEEmlATER CONTROL - STEAM GENERATOR, STEAM PRESSURE INS TRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels PT-545 Ch. II A If Channel II is being used as the Channel II is only partially available. See PT-514, Ref:

control channel when the postulated Also see FT-543, Sheet #32. Sheet #33 Appendix A-pages 18, 19, failure occurs, the following 24, 24B, 29, and 31.

happens:

-Loss of related operation of Feed-water Control Valve (24 BF 19).

B If Channel II is being used as the Channel I is available as the redundant control channel ~1hen the postulated control channel for Feed Pumps and failure occurs, the following Turbine Speed Control.

happens: Also see FT-343, Sheet #32.

-Loss of related operation of:

(1) Channel II operation.

(2) Feed Pumps and Turbine Speed Control. *

(3) Feedwater Control Valve (24 BF 19).

c None Channels I and II remain operable.

Also *see FT-543, Sheet #32.

If Channel II is being used as the Channel I and II are only partially control channel when the postulated available.

fa i1 ure occurs, i:he following Also see FT-543, Sheet #32.

happens:

-Loss of related operation of Feed-water Control Valve (24 BF 19).

CONTROL SYSTEM FAILURES Sheet 41

_TABLE #4 - LOSS OF POWER SOURCES SYSTEM: FEEm~ATER COtlTROL - STEAM GENERATOR LEVEL, ilARROW RANGE INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG #21 Channels LT-519 Ch. I I A If Channel II is being used as the In Steam Generators #21, 1122, 323 and These events are Ref:

control channel when the postulated #24, all other level protection remains bounded by the Appendix A-pages 11, 12, failure occurs, the following available. analysis cover- 13, 27, 27A, and 31.

happens: ing excessive

-Loss of related operation of Feed- Heat Removal due water Control Valve (21 BF 19). to Feedwater

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ' i y s t e m malfunc-B lf Channel II is being used as the

• Steam Generators #22, and #23 control tion.

control channel when the postulated and level protection remains available.

failure occurs, the following In Steam Generators #21, #22, lj23 and happens: 324, all other level protection remains

-Loss of related operation of Feed- available.

water Control Valve (21 BF 19).

C, D If Channel II is being used as the In Steam Generators #21, #22, #23 and control channel when the postulated 124, all other level protection remains failure occurs, the following available.

happens: NOTE: Part of all Steam Generators' level

-Loss of related operation of Feed- protection is unavailable (each bus water Control Valve (21 BF 19). implies different level protection).

CONTROL SYSTEM FAILURES Sheet 42 TABLE #4 - LOSS OF POWER SOURCES SYSTLM: FEEDWATER CONTROL - STEAM GENERATOR LEVEL, NARROW RANGE INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG #22 Channels LT-529 Ch. I A If Channel I is being used as the In Steam Generators #21, #22, #23 and See LT-519; Ref:

control channel when the postulated #24, all other level protection remains Sheet #41 Appendix A-pages 14, 15, failure occurs, the following available. 16,* 28, 28A, and 31.

happens:

-Loss of related operation of Feed-water Control Valve (22 BF 19).

B None Channel I remains operable.

C,

• D If Channel I is being used as the In Steam Generators #21, #22, #23 and control channel when the postulated #24, all other level protection remains failure occurs, the following available.

happens: NOTE: Part of all Steam Generators' level

-Loss of related operation of Feed- protection is unavailable (each bus water Control Valve (22 BF 19). implies different level protection).

CONTROL SYSTEM FAILURES Sheet 43

. TllBLE U4 - LOSS OF POWER SOUllCES SYSTEM: STEAM GENERATOR LEVEL, 1IARROW RANGE INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

SG #23 Channels LT-539 Ch. I A, D If Channel I is being used as the In Steam Generators #21, #22, #23 and See LT-519, Ref:

control channel when the postulated #24, all other level protection remains Sheet #41 Appendix A-pages 17, 18, failure occurs, the following available. 19, 29, 29A, and 31.

happens: tlOTE: Part of a 11 Steam Generators*

-Loss of related operation of Feed- level protection is unavailable (each water Control Valve (23 BF 19). bus implies different level protection).

B, C None Channel I remains operable.

LT-549 Ch. II A, D If Channel II is being used as the In Steam Generators #21, 922, n3 and See LT-519, Ref:

control channel when the postulated #24, all other level protection remains Sheet #41 Appendix A-pages 20, 21, failure occurs, the following

• available. 22, 30, 30A, and 31.

happens: NOTE: Part of all Steam Generators'

-Loss of related operation of Feed- level protection in unavailable (each water Control Valve (24 BF 19). bus implies different 1evel protection).

B If Channel II is being used as the Steam Generators #22 and #23 control and control channel when the postulated level protection remain available.

failure occurs, the following In Steam Generators #21, #22, #23 and happens: #24, all other level protection remains

-Low of related operation of Feed- avail ab 1e.

water Control Valve (24 BF 19).

c None Channel II remains operable.

(

CONTROL SYSTEM FAILUrtES Sheet 44 Tl\DLE 04 - LOSS OF POWEn sotmCES SYSTEM: STEAM DUMP INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels PT-505 Ch. I A If Channel I is being used as the Channel II is available for redundant N/A Ref:

control channel when the postulated Iii-Steam Flow Protection and related Appendix A-pages 11, 13, failure occurs, the following Steam Dump (Load Rejection). 14, 16, 17, 19, 20, 22, happens: 31, 31A, 44, and 46.

-Loss of related operation of:

(1) Channel I operation.

(2) #21, #22, #23 and #24 Feed-11a ter Control Valves.

(3) Rod Control.

( 4) Steam Dump (Load Rejection).

B None Channel I remains operable.

c If Channel I is being used as the Channels I and II remain available for control channel when the postulated control of Hi-Steam Flow Protection, Rod failure occurs, the following Control, and related Feed11ater Control happens: Valves.

-Loss of related operation of Steam Dump (Load Rejection).

D If Channel I is being used as the Channel II is available for redundant control channel when the postulated Hi-Steam Flow Protection and related failure occurs, the following Steam Dump (Load Rejection).

happens:

-Loss of related operation of:

(1) #21, #22, #23 and #24 Feed-water Control Valveso (2) Rod Control.

(3) Steam Dump (Load Rejection).

CONTROL SYSTEM FAILURES Sheet 45

. TABLE #4 - LOSS OF POWER SOURCES SYSl EM: STEAM DUMP INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels PT~506 Ch. I I A, D None Channel II remains operable. fl/A Ref:

Appendix A-pages 12, 15, 13, 21, 32, and 32A.

B If Channel II is being used as the Channel I is available as the redundant control channel when the postulated control channel.

failure occurs, the following happens:

-Loss of related operation of:

(1) Channel II operation.

(2) Steam Dump (Load Rejection).

c If Channel II is being used as the Channels I and II are available for control channel when the postulated Hi-Steam Flow Protection, Rod Control, failure occurs, the following and related Feedwater Control Valves.

happens:

-loss of related operation of

_Steam Dump (Load Rejection).

PT-507 A,B,D None Instrument remains operable. N/A c If this instrument is being used All atmospheric steam relief valves Ref:

when the postulated failure occurs, (MSlO's) and steam safety valves remain Appendix A-pages 33 and the following happens: operable. 33A.

-Loss of related operation of:

( 1) Condenser Steam Dump Valves (21 & 22 HS 31, 33, 35, 37, 39 & 41).

(2) Feed Pumps and Turbine Speed Control.

CONTROL SYSTEM FAILURES Sheet 46 TABLE #4 - LOSS OF POWER SOURCES SYST[M: STEAM DUMP INSTRUMENTS VITAL BUS -EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REM/IRKS (Loss)

Channels PT-508 A,B,C None Instrument remains operable. N/A Ref:

Appendix A-page 33 and 33B.

D If this instrument is being used when the postulated failure occurs, the following happens:

-loss of related operation of Feed Pumps and Turbine Speed Control.

PT-516A Ch. A If Channel I is being used as the Channels II, III and IV remain operable. N/A Ref:

control channel ~1hen the postulated All steam safety valves remain operable. Appendix A-pages 34 and failure occurs, the follm~ing 34B.

happens:

-Loss of related operation of atmo-spheric steam dump valve (21 MS lD).

B, C None Channels I and IV are available for atmospheric steam dump.

All steam safety valves remain operable.

D If Channel I is being used as the Channels II and III remain operable.

control channel when the postulated All steam safety valves remain operable.

failure occurs, the following happens:

-Loss of related operation of atmo-spheric steam dump valve (21 MS 10).

CONTROL SYSTEM FAILURES Sheet 47

. TABLE 04 - LOSS OF POWER SOURCES SYSTEM: STEAM DUMP INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AV/\ILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels PT-526A Ch. II A, D None Channels II and III remain operable. :I/A Ref:

All steam safety valves remain operable. Appendix A-pages 35 and 35B.

B If Channel II is being used as the Channels I, III and IV remain operable.

control channel when the postulated All steam safety valves *remain operable.

failure occurs, the following happens:

-Loss of related operation of atmo-spheric steam diimp valve (22 MS 10).

c If Channel II is being used as the Channel I is available for atmospheric control channel when the postulated steam relief.

failure occurs, the following All steam safety valves remain operable.

happens:

-Loss of related operation of atmo-spheric steam dump valve (22 llS 10).

PT-536A Ch. III A None Channels II, III and IV are available N/11 Ref:

for atmospheric steam relief. Appendix A-pages 36 and All s*team safety valves remain available. 36B.

B None Channels I, III and IV are available for atmospheric steam relief.

/Ill steam safety valves remain operable.

c If Channel III is being used as the Channel I is available for atmospheric control channel when the postulated steam dump.

failure occurs, the following All steam safety valves remain operable.

happens:

-Loss of related operation of atmo-spheric steam dump valve (23 MS 10).

D None Channels I, II and III are available for atmospheric steam relief.

All steam safety valves remain operable.

CONTROL SYSTEM FAILURES Sheet 48 TABLE 04 - LOSS OF POWER SOURCES SYSTEM: STEAM DUMP INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT (Loss) REMARKS Channels PT-546A Ch. IV A None Channels II, III and IV remain operable. N/A Ref:

All steam safety valves remain operable. Appendix A-pages 37 and 37B.

B None Channels I, III and IV r~nain operable.

All steani safety valves remain operable.

c If Channel IV is being used as the Channel I is available for atmospheric control channel when the postulated steam dump.

• failure occurs, the following happens: All steam safety valves remain operable.

-Loss of related operation of atmo-spheric steam dump valve (24 MS 10).

D If Channel IV is being used as the Channels II and III remain operable for control channel when the postulated atmospheric steam dump.

failure occurs, the following happens: All steam safety valves remain operable.

-Loss of related operation of atmo-spheric steam dump valve (24 MS 10).

~ .

CONTROL SYSTEM FAILURES Sheet 49 TABLE #4 - LOSS OF POWER SOURCES SYSTEM: NUCLEAR INSTRUMENTATION INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels NE-35 Ch. I A If Channel I is being used as the Channel II is available as the redun- These events are Ref:

control channel when the postulated dant control channel. bounded by the Appendix A-page 38.

failure occurs, the following analysis cover-happens: ing the Uncon-

-Loss of related operation of trolled Rod Channel I Intermediate Range Cluster Control Detector. Assembly Bank Hithdrawa l at B,C,D None Channel remains operable. Power.

NE-36 Ch. II A,C,D None Channel II remains operable. See NE-35, Ref:

Sheet #49 Appendix A-page 39.

B If Channel II is being used as the Channel I is available as the redun-control channel when the postulated dant control channel.

failure occurs, the following happens:

-Loss of related operation of Channel II Intermediate Range Detector.

CONTROL SYSTEM FAILURES Sheet 50 TABLE #4 - I OSS OF POWER SOURCES SYSTEM: NUCLEAR INSTRUMENTATION INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels i~E-41 Ch. I A If Channel I is being used as the Channels II, Ill and IV are available See NE-35, ' Ref:

control channel when the postulated as redundant control channels. Sheet #49 Appendix A-pages 7, 40, failure occurs, the fa 11 owing

• and 44.

happens:

-Loss of related operation of:

(1) Channel I operation.

(2) Auto Turbine Runback and Block Auto and Manual Rod Withdrawal.

(3) Rod Control.

B None Channels Ill and IV are available as redundant control channels.

Channel I remains operable.

c None Channels II and IV are available as redundant control channels-Channel I remains operable.

D None Channels II and III are available as redun~ant control channels.

Channel I r;,emains operable.

CONTROL SYSTEM FAILURES Sheet 51

. TABLE #4 - LOSS OF POWER SOURCES SYSTEM: NUCLEAR INSTRUMENTATION INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE RFDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels NE-42 Ch. II A None Channels Ill and IV are available as See NE-35, . Ref:

redundant control channels. Sheet #49 Appendix A-pages 8, 41, Channel II remains operable. and 44.

B If Channel II is being used as the Channels I, Ill and IV are available control channel when the postulated as redundant control channels.

failure occurs, the following happens:

-Loss of related operation of:

(1) Channel II operation.

(2) Auto Turbine Runback and Block Auto and Manual Rod Withdrawal.

(3) Rod Control.

C None Channels I and IV are available as redundant control channels.

Channel II remains operable.

D None Channels I and III are available as redundant control channels.

Channel II remains operable.

CONTROL SYSTEM FAILURES Sheet 52 TABLE #4 - LOSS OF.POWER SOURCES SYSTCM: NUCLEAR INSTRUMENTATION INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels NE-43 Ch. III A None Channels II and IV are available as See NE-35, Ref:

redundant control channels. Sheet #49 Appendix A-pages 9, 42, Channel III remains operable. and 44.

B None Channels I and IV are available as redundant control channels.

Channel III remains operable.

C If Channel III is being used as the Channels I, II and IV are available as control channel when the postulated redundant control channels.

failure occurs, the following happens:

-Loss of related operation of:

(1) Channel III operation.

(2) Auto Turbine Runback and Block Auto and Manual Rod Wi thdrawa 1.

(3) Rod Control.

D None Channels I and II are available as re-dundant control channels.

Channel III remains operable.

CONTROL SYSTEM FAILURES Sheet 53 TABLE #4 - LOSS OF POWER SOURCES SYSTEM: NUCLEAR INSTRUMENTATION INSTRUMENTS VITAL BUS EFFECTS OF FAILURES AVAILABLE REDUNDANT FUNCTIONS BOUNDING EVENT REMARKS (Loss)

Channels NE-44 Ch. IV A None Channels II and III are available as See NE-35,. Ref:

redundant control channels. Sheet #49 Appendix A-pages IO, 43, Channel IV remains operable. and 44.

B None Channels I and Ill are available as redundant control channels.

Channel IV remains operable.

C None Channels I and JI are available as re-dundant control channels.

Channel IV remains operable.

D If Channel IV is being used as the Channels I, II and III are available as control channel when the postulated redundant control channels.

failure occurs, the following happens:

-Loss of related operation of:

(I) Channel IV operation.

(2) Auto Turbine Runback and Block Auto and Manual Rod Withdrawal.

(3) Rod Control.

CONTROL SYSTEMS FAILURES APPENDIX A

APPENDIX A TABLE OF. CONTENTS System: Pressurizer Pressure and Level Control t Instrument Page Pressurizer Pressure. PT-455 CH I l,lA,5 r Protection and Control PT-456 CH II 2,2A,5 PT-457 CH III 3,3A,3B,5 1 PT-474. CH IV 4,4A,5 I'

Pressurizer Level LT-459 Prot I 6,6A Protection and Control , LT-460 Prot II 6,6B LT-461 Prot III 6,6C,6D System: Reactor Coolant Temperatures Instrument Page Jl.T and Tavg Protections TE-411 A Loop 21 7,7A TE.;..411 B 7 TE-421 A Loop 22 8,8A

~ TE-421 TE-431 B

A Loop 23 8

9 TE-431 B 9,9A

'1 TE-441 A Loop 24 10 TE-441 B 10,lOA System: Feedwater Control Instrument Page 1 Stearn Generator Feedwater FT-510 SG#21 Prot I 11,llA ,13 Flow Protection FT-512 11,llB,13 FT-520 SG#22 Prot I 14,14A,16 FT-522 14,14B,16 FT-530 SG#23 Prot I 17,17A,19 FT-532 17,178,19 FT-540 SG#24 Prot I 20,20A,22 FT-542 20,20B,22 Steam Generator Steam FT-511 SG# 21 Prot II 12,12A,13 Flow Protection FT-513 12,12B,13 FT-521 SG#22 Prat II 15,lSA,16 FT-523 15,158,16 FT-531 SG#23 Prot II 18,18A,19 FT-533 18,lSB,19 FT-541 SG#24 Prat II 21,2.lA,22 FT-543 21,21B,22

System: Feedwater Control (Cont'd)

Instrument Paqe Steam Generator Steam Line PT-514 SG#21 Prot I 23,23A Pressure Protection PT-524 SG#22 23,23B

~\ PT-515 SG#21 Prot II 24,24A PT-535 SGt23 24,24B

, PT-525 PT-545 PT-534 SG#22 SG-i¥24 SG#23 Prot II Prot I 25,25A 25,25B 26,26A PT-544 SG#24 26,26B I Steam Generator Level LT-519 LT-529 SG#21 SG#22 Prot Prot II I

27,27A 28,28A LT-539 SG#23 Prot I 29,29A,29B LT-549 SG#24 Prot II 30,30A r

System: Steam Dump High Steam Flow Instrument PT-505 CH I Paqe 31,31A,31B PT-506 CH II 32,32A,32B Steam Generator Header Pressure PT-507 33 Steam Generator Inlet Header Pressure PT-508 33 Steam Sump to Atmosphere PT-516A SG#21 CH I 34,34A,34B PT-526A SG#22 CH II 35,35A,35B PT-536A SG#23 CH III 36,36A,36B PT-546A SG.# 24 CH IV 37,37A,37B System: Nuclear Instrumentation Instrument Paqe Intermediate Range #1 Detector NE35 38 Intermediate Range t2 Detector NE36 39 Power Range Detector NE41A 40 l NE41B NE42A 41 NE42B NE43A 42 I NE43B

System: Nuclear Instrumentation (Cont'd)

Instrument* Page Power Range Detector (cont' a) NE44A 43 NE44B System: Rod Control Page 44 System: Tavg and Steam Dump Page 45 and 46

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