Text

Forwards Revised Pages of 870311 Reactor Protection Sys Single Failure Analysis,Per 881122 Telcon W/C Trammell. Analysis Revised to Include Nuclear Instrumentation Sys Upgrade Mods Planned for Upcoming Cycle 10 Refueling Outage
	ML13330B434
Person / Time
Site:	San Onofre
Issue date:	11/23/1988
From:	Nandy F; SOUTHERN CALIFORNIA EDISON CO.
To:	; NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
	NUDOCS 8812010345
	Download: ML13330B434 (19)
	v • d • e

Southern California Edison Company P 0.

BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD. CALIFORNIA 91770 F. R. NANDY TELEPHONE MANAGER OF NUCLEAR LICENSING (818) 302-1896 November 23, 1988 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 Gentlemen:

Subject:

Docket No. 50-206 Nuclear Instrumentation System Upgrade San Onofre Nuclear Generating Station Unit 1 In response to a telephone request from Mr. Charles Trammell on November 22, 1988, we are enclosing for your review the revised pages for the Reactor Protection System Single Failure Analysis originally submitted on March 11, 1987. The analysis has been revised to include the Nuclear Instrumentation System upgrade modifications which are planned for the upcoming Cycle 10 refueling outage.

If you have any questions regarding this, please call me.

Very truly your Enclosure cc: C. M. Trammell, NRR Project Manager, San Onofre Unit 1

3. B. Martin, Regional Administrator, NRC Region V F. R. Huey, NRC Senior Resident Inspector, San Onofre Units 1, 2 and 3 Ctill

eo.3 PEPD6

Reactor Protection System Single Failure Analysis San Onofre Unit 1 TABLE 4:

NIS SCRAMS AND PREMISSIVES

REFERENCES:

A.

SYSTEM DESCRIPTIONS:

SD-S01-380 NUCLEAR INSTRUMENT SYSTEM SD-SO1-400 ROD CONTROL SYSTEM SD-SOl-570 REACTOR PROTECTION SYSTEM AND PERM.

B.

DRAWINGS:

5150625 5150884 W 2D33794 5151505 5151506

2D33795 5151507 63714 W 1872650 SH 2-9 5102173 W 2D33791 W 2D33793 NOTES:

A. SOURCE RANGE CHANNELS (NE-1201, NE-1202)

AND PERMISSIVES NOT ASSOCIATED WITH SAFETY FUNCTIONS CREDITED IN THE TRANSIENT ANALYSIS ARE NOT SPECIFICALLY EVALUATED.

SINCE THEIR IMPACTS ON THE SAFETY FUNCTIONS ARE BOUNDED BY THE POSTULATED FAILURES OF THE REMAINING DEVICES.

B. CHANNEL NOTATION FOR THIS ANALYSIS IS BASED ON POWER SUPPLY (TO FACILITATE AUTOMATED SORT FOR SECTIONS 8 AND 9) AS FOLLOWS:

POWER CHANNEL I

NIS CHANNEL NE-1205 (NE-1203)

POWER CHANNEL II NIS CHANNEL NE-1207 (NE-1204)

POWER CHANNEL III NIS CHANNEL NE-1206 POWER CHANNEL IV NIS CHANNEL NE-1208 C. DEVICES FOR INTERMEDIATE RANGE CHANNELS (NE-1203 and NE-1204)

ARE ADDRESSED IN SECTIONS 4.5 AND 4.6 RESPECTIVELY, AND CHANNEL-COMMON DEVICES, INCLUDING BOTH COINCIDENTORS IN SECTION 4.7.

D. THE REDUNDENT A AND B COINCIDENTORS ARE INSTALLED PART OF THE RPS, WHICH IS WHOLLY TRAIN A. WESTINGHOUSE "TRAIN" A & B NOTATION FOR THE A AND B COINCIDENTORS IS THEREFORE NOT APPLICABLE TO THIS INSTALLATION.

E. FAILURE MODES OF THE ROD CONTROL RATE AMPLIFIER ARE NOT SPECIFICALLY ADDRESSED BECAUSE EFFECTS ON THE NIS CHANNELS ARE BOUNDED BY THOSE OF OTHER DEVICES IN THE SAME CHANNEL, OUTPUT FAILURES ARE ISOLATED FROM THE INPUT CHANNEL, AND THE OUTPUT ONLY AFFECTS ROD SPEED SELECTION.

-2 F. THE DROPPED ROD/ROD STOP IS EXPLICITLY EVALUATED IN THIS ANALYSES, SINCE THIS FUNCTION IS CREDITED IN THE TRANSIENT ANALYSES MULTIPLE DROPPED ROD EVENTS.

G. ONLY ONE NIS CHANNEL CAN BE BYPASSED AT A TIME, DUT TO USE OF KEYED BYPASS SWITCHES, ALARMS AND ADMINSTRATIVE CONTROLS.

H. ONLY ONE COINCIDENTOR (A OR B) CAN BE BYPASSED AT A TIME.

2021 L

Page No.

I 11/23/88 REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS SAN ONOFRE UNIT I TABLE 4:

NIS SCRAMS AND PERmISSIVES LOCAL EFFECTS AND METHOD OF INHERENT COMPENSATING ITEM

DEVICE ID FAILURE MDE DEPENDENT FAILURES DETECTION PROVISIONS EFFECT ON RPS REMARKS 4.1.01.1 NE 1205A SIGNAL HIGH 4.1.01.

NE 1205 SIGNAL SUCHANNEL FLUX SIGNAL (LOOP CONTROL ROOM INDICATION, NONE REUIRED FOR CHANNEL I OVERPOWER TRIPPED, LOGIC P-DEFEAT AND P-DEFEAT LOGIC BECOME DETECTOR

~~~~~~

CURRENT)

TO SHUNT TO CHANNEL

SUMM ING ANN UNCIATION, PER IO D IC TESTING OVERPOW ER TR

IPS, B C M S 1 3 O E A N N A N L.1 3 O E A N N H N E S AMP, TOEV AMP O TD ANALOG OUTPUTS1 LAG REDUNDANT CHANNELS FOR CHANNEL I DROPPED ROD STOP

DISABLED, AP-7, P-B, OVERPOWER P-7, IP-8, DROPPED OD LOGIC BECOMES 1/3 ON REMAINING CHANNELS.

B/STACPORFO TRIPS AND ROD STOPS.

HIGH RATE SIGNAL O

MAY ALSO BE SENT TO ROD CONTROL VIA 4.1.01.2 NE 1205A SIGNAL LOW LOW SU HAE FLUX SIGNAL (LOOP (SAME AS 4.1.1.11 REDUNDANT CHANNELS FOR CHANNEL I OVERPOWER AND DROPPED ROD P-7 DEFEAT AND P-B DEFEAT LOC C

DETECTOR CURRENT) TO SHUNT TO CHANNEL 1: SUMMING OVERPOWER TRIPS AND STOPS DISABLED, LOIC BECOMES 2/3 AND 23 ON REMAINING CHANNELS AMP TO LEVEL AMP TO ANALOG

OUTPUTS, LAG DROPPED ROD

STOPS, NONE 1/3 RESPECTIVELY ON REMAINING CHANNELS AMP, B/S AMPS FOR P-i, P-6, OVERPOWER REQUIRED FOR P-7, P-B TRIPS AND ROD STOPS. NEGATIVE RATE SIGNAL MlAY CAUSE DROPPED ROD STOP.

4.1.02.1 NE 1205A SHUNT OPEN (SANE AS 4.1.1.2)

(SAME AS 4.1.1)

(SAME AS 4.1.1.2)

(SAME AS 4.1.1.2) 4.1.02.2 NE 1205A SHUNT SHORT (SAME AS 4.1.1.1)

(SAME AS 4.1.

(SAME AS 4.1.1.1)

(SAME AS 4.1.1.1) 4.1.03.1 NE 1205B SIGNAL HIGH (SAME AS 4.1.1.1) HIGH RATE SIGNAL MAY (SAME AS 4.1.1.1)

(SAME AS 4.1.1.1)

(SAME AS 4.1.1.1) CHANNEL I HIGH SUR (SAME AS 4.l.1.1) ALSO CONNECTS TON1203 DETECTOR ALSO RESULT To N1203 WIDE RANGE AMP 4.1.0.2TRIP MAY OCCUR IF -7 ON.

INTERMEDIATE RANGE CHANNEL.

VOLT2)

SUPLE INL A SAEA 41i 4.1.03.2 UNE 120I SOTES 411 3 W RATG E AS (SAME AS 4.1.1.2)

(SAME AS 4.1.1.2) CHANNEL IHIGH SUR DEETO LO EUT ON10 ID AGEAPTRIP DISABLED, LOGIC BECOMES 1/1 ON IAEA...12 4.1.04.1 NE 1205B SHUNT OPEN (SAME AS 4.1.1.2)

(SAME AS 4.1.1.)

(SAME AS 4.1.1.2)

O RA E 4.1.04.2 E 1205 SHNT SHORT (SAME AS 4.1.1.1)

(SAME AS 4.11.1)

(SAME AS 4.1.1.1)

(SAME AS 4.1HR1.T (SAME AS 4.1.1.2) 4.1.07.

NE 1205A IGH VOLTS HIGH (SAME AS

(.1.1.1)

(SAME AS 4.11.1)

(SAME AS 4.1.1.1)

VOLTAGE SUPL (AEA... )

S S4111 SM S4111 SM S4111 VOL5AG E 125&

HG OTSZR (AEA 4112 (SAME AS 4.1.1.1)

(SAME AS 4.1.1.2)

(SAME AS 4.1.1.2) 4106.1 SUMMING AMP I OPEN (SAME S 4.1.1.2)

(SAXE AS 4.1.1.1)

(SAME AS 4. 1. 1.2)

(SAME AS 4.1.1.2)

(SAME AS 4.1.1.E) 4.1.06.2 SUMMING AMP I SHORT (SAME AS 4.1.1)

(SAME AS 4.1.1.1)(

4. 1.07.5 1 LEVEL AMP I SA E A.1 1 ')(

AM Sg1 1 - )(

A E AS 4 1 1,

4.1.07.1 N V 41 P I INPUT OPEN LOW CHANNEL I FLUX SIG TO ANLOG (SAME AS 4.1.1.1)

(SAME As 4.1.1.2)

(SAME AS 4.1.1.

(SAME AS 4.1. 1.2

OUTPUTS, LPG AMP, B/S AMPS FOR P-7, P-8 2

4.1.07.2 LEVE AMP I INPUT SHORT (SAME AS 41.7.1) LOOP CURRENT AY (SME AS 4.1.1.1)

SAME AS 4.1.12)

(SAME AS LOCML EFFECTS1.ND

INCREASE, RESULTING HIGH RATE SIGNAL TO ROD CONTROL VIA I/NN A AND 4.1.07.3 LEVEL AMP I OUTPUT HIGH HIGH CHANNEL I FLUX SIGNAL To ANALOG (SAME AS 4.1.1.1)

(SAME AS 4..)

(SAMIE AS 4.1.1.!)

OUTPUTS, LAG AMP, B/S AMPS FOR P-, P-R 4.-0.4LEELAM I

OUPU LW VEPORTRIPS AND ROD STO IH AS IG 4 1 7 4 L VE AM I OUP T L W(SAME AS 4.1.7.)1)

(SAME AS 4.1.1.1 (SAME AS 4.1.1.2)

(SAME AS 4.1.1 2)

(S AE AS 4.1.1.2) 4.1.07.5 LEVEL AMP I TEST (SAME AS 4.1. 7.

1)

ANNUNCIATION (NAp-1200-I) (SANE AS 4.1.1.2)

(SAME AS 4.1.1.1 (SAME AS 4.1.1.2) TEST/CALIBRATE SWITCH 4.1.0Y.1 NI 41A INPUT OPEN LOSS OF % FP INDICATION FOR NE-1205 CONTROL ROOM INDICATION NONE REQUIRED NONE 4.1.08.2 NI 41A INPUT SHORT (SAME AS 4.1.7.1)

(SAME AS 4.1.1.1)

(SAME AS 4.1.1.2)

(SAME AS 4.1.1.2) DRAWER INDICATOR BON48S SHND DI INUERENTIATOTHE 4.1.09.1 NC-41P BISTABLE TRIPPED CHANNEL I LOW-RANGE OVERPOWER TRIP ANNUNCIATION, PERIODIC TESTING NONE REQUIRED IF LOW RANGE SELECTED, CHANNEL I C-AONPER RNGEVE ONVEWE BABM MP CHANNELBIHDNVICESFNULEVILGAMP OUTPU SIGNAL TO COINCIDENTOR VIA RANGE SWITCH N

-OVERPOWER TRIPPED, LOGIC BECOMES 1/3 ON IREMAINING CHANNELS.

IF MID OR HI RANGE, NO) EFFECT

Pane No.

2 11/23/88 REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS

.4 ', ISANONDFRE UNIT I TABLE 4:

NIS SCRAMS AND PERMISSIVES LDCALEFFETS AD MEHODO INHERENT COMPENSATING ITEM #

DEVICE ID FAILURE MODE DEPENDENT FAILURES DETECTION PROVISIONS EFFECT ON RPS REMARKS 4.1.09.2 NC-41P BISTABLE UNTRIPPED LOSS OF CAPABILITY TO TRIP CH I PERIODIC TESTING IF LOW RANGE SELECTED, IF LOW RANGE

SELECTED, CHANNEL I

OVERPOWER RELAYS IN COINCIDENTOR WHEN REDUNDANT CHANNELS.

IF OVERPOWER

DISABLED, LOGIC BECOMES 2/3 ON NCS-1200-1 IS IN LOW RANGE MID DR HI RANGE, NONE REMAINING CHANNELS.

IF MID OR HI RANGE, REQUIRED NO EFFECT 4.1.10.1 NC-41J BISTABLE TRIPPED CHANNEL I MID-RANGE OVERPOWER TRIP ANNUNCIATION, PERIODIC TESTING NONE REQUIRED 4..1. NCI4 BISTABL UNTRIPCANEPED-0%PWR AG OEPOE ISAL SIGNAL TO COINCIDEN4OR VIA RANGE SWITCH OVERPOWER TRIPPED. LOGIC ECOMES 1/3 ON AMP NCS-41L0-E REMAINING CHANNELS.

IF LOW OR Hi RANGE, NO EFFECT 4.1.10.2 NC-4J BISTABLE UNTRIPPED LOSS OF CAPABILITY TO TRIP CH I PERIODIC TESTING IF MID RANEE SELECTED, IF MID RANGE

SELECTED, CHANNEL I

OVERPOWR RELAYS IN COINCIDENTOR WHEN REDUNDANT CHANNELS. I F OVERPOWER DISABLED. LOGIC BECOMES 2/3 ON NCS-12.* -11 IN MID RANGE LOW OR Hl RANGE, NONE REMAINING CHANNELS. IF LOW OR HI RANGE, REQUIRED NO EFFECT 4.1.11.1 NC-41R BISTABLE TRIPPED CHANNEL I HI-RANGE OVERPOWER TRIP SIGNAL ANNUNCIATION, PERIODIC TESTING NONE REQUIRED IF HI RANGE

SELECTED, CHANNEL 1

70-100% POWER RANGE OVERPOWER BISTABLE TO COINCIDENTOR VIA RANE SWITCH OVERPOWER TRIPPED, LOGIC BECOMES 1/3 ON AMP NCS-120-REMAINING CHANNELS.

IF LOW OR MID

RANGE, NO EFFECT 4.1.11.2 NC-41R BISTABLE UNTRIPPED LOSS OF CAPABILITY TO TRIP CH I PERIODIC TESTING IF HI RANGE SELECTED, IF Hi RANGE

SELECTED, CHANNEL 1

OVERPOWER RELAYS IN COINCIDENTOR WHEN REDUNDANT CHANNELS.

IF: OVERPOWER

DISABLED, LOGIC BECOMES 2/3 ON NCS-1200-l IS IN HI1 RANGE LOW DR MID RANGE, NONE REMAINING CHANNELS.

IF LOW OR MID REQUI RED

RANGE, NO EFFECT 4.1.12.1 NC-41M BISTALBE TRIPPED CHANNEL I P-7 RELAYS ACTUATED IN ANNUNCIATION REDUNDANT CHANNELS FOR P-7 DEFEAT LOGIC BECOMES 2/3, ALL SCRAM P-7 BISTABLE AMP COINCIDENTOR P-7 DEFEAT FUNCTIONS REMAIN UNAFFECTED

4. 1.12.2 NC-41M BISTABLE UNTRIPPED LOSS OF CAPABILITY TO ACTUATE CHANNEL I PERIODIC TESTING REDUNDANT CHANNELS FOR P-7 DEFEAT LOGIC BECOMES 1/3, ALL SCRAM P-7 RELAYS IN COINCIDENTOR P-7 SUR SCRAM CUT-IN FUNCTIONS REM4AIN UNAFFECTED 4.1.13.1 NC-41N BISTABLE TRIPPED CHANNEL I P-B RELAYS ACTUATED IN ANNUNCIATION REDUNDANT CHANNELS FOR P-B DEFEAT LOGIC BECOMES 2/3,.ALL SCRAM P-B BISTABLE AMP COINCIDENTOR P-B DEFEAT FUNCTIONS REMAIN UNAFFECTED 4.1.13.2 NC-41N BISTABLE UNTRIPPED LOSS OF CAPABILITY TO ACTUATE CHANNEL I

PERIODIC TESTING NONE REQUIRED P-B DEFEAT LOGIC BECOMES 1/3, ALL SCRAM P-8 RELAYS IN COINCIDENTOR FUNCTIONS REMAIN UNAFFECTED

4. 1.14.1 NC-41K BISTABLE TRIPPED CHANNEL I DROPPED ROD STOP SIGNAL TO ANNUNCIATION NONE REQUIRED ROD STOP COINCIDENTOR 4.1.14.2 NC-I)

BISTABLE UINTiRIPPEEED LOSS OF CAPABILITY TO TRIP CHANNEL I

PERIODIC TEST REDUNDANT CHANNELS CHANNEL I DROPPED ROD SOP DISABLED DROPPED RD STOP RELAYS IN COINCIDENTOR LOGIC BECOMES 1/3 ON REMAINING CHANNELS 4.1.15.1 N 1205 LOW VOLTS HIGH (SAME AS 4.1.7.3)

(SAME AS 4. 1.

1.1)

(SAME AS 4.1.1.1)

VOLTAGE SUPPLY 4.1.15.2 N 1205 LOW VOLTS ZERO LOSS OF POWER TO CHANNEL I OVERPOWER, ANNUNCIATION (SAME AS 4.1.1.1)

(SAME AS 4.1.1.1)

VOLTAGE SUPPLY P-7, P-B AND ROD STOP BISTABLES.

4.1.16.1 NC-41PJRTAI A TRIP CHANNEL I OVERPOWER TRIP SIGNAL IN ANNUNCIATION (NCS-12 D S-6) NONE REQUIRED CHANNEL I OVERPOWER TRIPPED, LOGIC NC-41PJRTBI COINCIDENTOR BECOMES 1/3 ON REMAINING CHANNELS 4.1.16.2 NC-41PJRTAI 9 UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL I

PERIODIC TESTING REDUNDANT CHANNELS CHANNEL I OVERPOWER

DISABLED, LOGIC NC-41PJRTBl OVERPOWER TRIP IN COINCIDENTOR BECOMES 2/3 ON REMAINING CHANNELS 4.1.17.1 NO-4IMTAI &

TRIPPED CHANNEL I P-7 ACTUATION SIGNAL IN (SAME AS4.1.I2. ID (SAME AS 4.1.12.1)

(SAME AS 4.1.12.1)

P-7 RELAYS NC-41MI COINCIDENTOR

4. 1.17. 2 NC-41MTAI &

UNTRIPPED LOSS OF CAPABILITY FOR CHNEL I P-7 (SAME AS 4.1.12.2)

(SAME AS 4.1.12.2)

NC-4DMTBI ACTUATION IN COINCIDENOR 401.1A.1I NC-41NTAI &

TRIPPED CHANNEL I P-B ACTUATION SIGNAL IN (SAME AS 4.1.13.1)

(SAM AS 4.1.13.1)

(SAME AS 4.1.13.1)

P-B RELAYS NC-41NTBI COINCIDENTOR 4.1.18.2 NC-41NTA1 UNTRIPPED LOSS OF CAPABILITY FOR C NNEL I P-B (SAME AS 4.1.13.2)

(SAME AS 4.1.13.2)

NC-41NTBI ACTUATION IN COINCIDENTOR

F Page No.

3 11/23/88 REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS SAN ONOFRE UNIT 1 TABLE 4:

NIS SCRAMS AND PERMISSIVES LOCAL EFFECTS AND METHOD OF INHERENT COMPENSATING ITEM I DEVICE ID FAILURE MODE DEPENDENT FAILURES DETECTION PROVISIONS EFFECT ON RPS REMARKS 4.1.19.1 NC-41PJRXAl&2 & TRIPPED CHANNEL I OVERPOWER TRIP IN COINCIDENTOR (SAME AS 4.1.16.1)

(SAME AS 4.1.16.1)

NC-41PJRXBl&2 B RELAYS MUST TRIP FOR CHANNEL TRIP TO 4.1.19.2 NC-41PJRXP142 & UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL I

(SAME AS 4.1.16.2)

OCCUR NC-41PJRXBl&2 OVERPOWER TRIP IN COINCIDENTOR 4.1.20.1 NC-41MXA &

TRIPPED CHANNEL I P-7 TRIP IN COINCIDENTOR (SAME AS 4.1.17.)

(SAME AS 4.1.17.1)

NC-41MXB 4.1.20.2 NC-41MXA UNTRIPPED LOSS OF CAPABILITY FOR CHAEL I P-7 (SAME AS 4.17.2)

(SAE AS 4.1.17.2)

(SAME AS 4.1.17.2)

NC-41MXB ACTUATION IN COINCIDENTOR 4.1.21.1 NC-41NXA TRIPPED CHNEL I P-8 TRIP IN COINCIDENTOR (SAME AS 4.1.18.)

(SA AM AS 4.1.18.1)

NC-4NXBTRIP FOR CHANNEL TRIP TO OCCUR 4.1.21.2 NC-41NXA &

UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL I P-8 (SAME AS 4.1.18.2)

(SAME AS 4.1.18.2)

NC-41NXB ACTUATION IN COINCIDENTOR 4.1.22.1 NC-41KXA &

TRIPPED CHANNEL I DROPPED ROD STOP IN ANNUNCIATION NONE REUIRED ROD STOP BOTH DROPPED ROD STOP A & B RELAYS MUST NC-41KXB COINCIDENTOR 4.1.22.2 NC-41XA &

UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL I DROPPED PERIODIC TEST REDUNDANT CHANNELS CHANNEL I DROPPED ROD STOP

DISABLED, NC-41KXB ROD STOP IN COINCIDENTOR 4.1.23.1 REG SUPL I VOLTS ZERO OR LGCRMIIGCANL 4..3. EGSP I

VLT ER R LOSS OF POWER TO CHANNEL 1 (N-1203 AND CONT ROL ROOM INDICATION, (SAME AS 4. 1. 1.1)

(SAME AS 4.1.1.1) REACTOR TRIP ON (SANE AS 4. 1.1. 1)

(NIS)

GROUNDED N-1205) HIGH, LOW AND AUX VOLTAGE ANNUNCIATION CHANNELIHIGHSURIFP-7ISON 4.2.01.1 NE 1207A SIGNAL HIGH HIGH SURCHANNEL FLUX SIGNAL (LOOP CONTROL ROOM INDICATION, NONE REQUIRED FOR CHANNEL II OVERPOWER TRIPPED. LOGIC P-7 DEFEAT AND P-8 DEFEAT LOGIC BECOME DETECTOR CURRENT)

TO SHUNT TO CHANNEL 11:

ANOCAIN PERIODIC TESTING OVERPOWER

TRIPS, BECOMES 1/3 ON REMAINING CHANNELS. 1/3 ON REMAINING CHANNELS SUMM~ING AMP TO LEVEL AMP TO ANALOG

.REDUNDANT CHANNELS FOR CHANNEL 11 DROPPED ROD STOP

DISABLED, OUTPUTS LAG AMP, B/S AMPS FOR P-7, P-B, P-7, P-8 DROPPED ROD LOGIC BECOMES 1/3 ON REMAINING CHANNELS OVERPOWER TRIPS AND ROD STOPS. HIGH STOP RATE SIGNIAL MAY ALSO BE SENT TO ROD CONTORL VIA I/N-48A AND DIFFERN 4.2.01.2 NE 1207A SIGNAL LOW LOW SUBHANNEL FLUX SIGNAL (LOOP (SAME AS H2.I1.1)

REDUNDANT CHANNELS FOR CHANNEL II OVERPOWER AND DROPPED ROD P-DEFEAT AND P-B DEFEAT LOGIC BECOME DETECTOR CURRENT)

TO SHUNT TO CHANNEL II:

OVERPOWER TRIPS AND STOP

DISABLED, LOGIC BECOMES 2/3 AND 1/3 2/3 ON REMAINING CHANNELS SUMMING AMP To LEVEL AMP TO ANALOG DROPPED ROD

STOPS, NONE RESPECTIVELY ON REMAINING CHANNELS OUTPUTS LAG AMP, B/S AMPS FOR P-7, P-B, REQUIRED FOR P-7, P-B OVERPOWER TRIPS AND ROD

STOPS, NEGATIVE RATE SIGNAL MAY CAUSE DROPPED ROD STOP 4.2.02.1 NE 1207A SHUNT OPEN (SAME AS 4.2.1.2)

(SAE AS 4.2.1.1)

(SAME AS 4.2.1.2)

(SAME AS 4.2.1.2) 4.2.04.2 NE 12078 SHUNT SHORT

& AS421) 4..22N 2iASUTSOT(SAME AS 4. 2.1i.1)

(SAME AS 4.2.1.1)

(SAME AS 4...)(SANE AS 4.2. 1.1)

(SAME AS 4.2.1.1) 4.2.03.1 NE 1207B SIGNAL HIGH (SAE AS 4.2.1.1) HIGH RATE SIGNAL MAY (SAME AS 4.2.1.1)

(SAME AS 4.2.1.1)

DET CT R LSO RE UL T N-20 W DE AN E MPT R IP MAY OCCU R IF P -7 IS ON N -1204 IN TERM ED IA TE RANGE CHA N NEL 4.2.03.2 NE 1207B SIGNAL LOW (SAM AS 4.2.1.2) LOW RATE SIGNAL MAY (SAME,-

AS 4.2.1.1)

(SAME AS 4.2.1.2)

(SAME AS 4.2.1.2) CHANNEL 1I HIGH SUR (SAME AS 4.2.1.2)

DETECTOR ALSO RESULT TO N-1204 WIDE RANGE AMP DISABLED, LOGIC BECOMES

!/I ON OTHER 4.2.04.2 NE 12078 SHUNT SHORT (SAME AS 4. 2. 1.1)

(SAME AG 4.2.1.1)

(SANE AS 4.2.1.1)

(SAME AS 4.2.1.1)

(SANE AS 4.2.1.1) 4.2.05.1 NE 1207A&B HIGH VOLTS H-IGH (SAME AS 4.2.1.1i)

(SAME AS 4.2.1.1)

(SANE AS 4.2.1.1)

(SAME AS 4.2.1.1)(SMAS421)

VOLTAGE SUPL

(

4.2.05.2 NE 1207A&B HIGH VOLTS ZERO (SAME AS 4.2.1.2)

(SAME AS 4.2.1.1)

(AME AS 4.2.1.2)

(SAME AS 4.2.1.2)

VOLTAGE SUPL 4.2.06.1 SUMMING AMP II OPEN (SAME AS 4.2.1.2)

(SAE AS 4.2.1.1)

(SAM AS 4.2.1.2)

(SA AS 4.2.1.2)

(SAME AS 4.2.1.2) 4.2.06.2 SUMMING AMP II SHORT (SAME AS 4.2.1.1)

(SAME AS 4.2.1.1)

(SAME AS 4.21.1)

CHANNEL1 IEE PVERP ER TRIME IN C4NIDND.2.E1S41.6.1)AES41.61 4.2.07.1 LEVELOFCPAIITNPUT OPEN LOW CHANNEL II FLUX SIGNAL TO ANALOG (SAME AS 4.2.1.1)

(SAME AS 4.2.1.2)

(SAME AS 4.2.

OUTPUTS LAG AMP, B/S AMPS FOR P-7, P-8, SM S4212 OVERPOWER TRIPS AND ROD STOPS

Page No.

4 11/23/88 REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS SAN ONOFRE UNIT I TABLE 4: NIS SCRAMS AND PERMISSIVES LOCAL EFFECTS AND METHDD OF INHERENT COMPENSATING ITEM I DEVICE ID FAILURE MODE DEPENDENT FAILURES DETECTION PROVISIONS EFFECT ONRPS REMARKS.

4.2.07.2 LEVEL AMP ]1 INPUT SHORT (SAME AS 4.2.7.t) LOOP CURRENT MAY (SAME AS 4.2.1.1)

(SAME AS 4.2.1.2)

(SAME AS 4.2.1.2) CHANNEL 11 HIGH SUR (SAME AS 4.2.1.2)

INCREASE AND RESULT IN HIGH RATE SIGNAL TRIP MAY OCCUR IF P-7 IS ON 4O ROD CONTROL VIA INN-4PA AND DIFFERENTIATOR 4.2.07.3 LEVEL AMP II OUTPUT HIGH HIGH CHANNEL 1 FLUX SIGNAL TO ANALOG (SAME AS 4.2.1.1)

(SAME AS 4.2.1.1)

OUTPUTS LAS AMP, B/S AMPS FOR P-7, P-B 1

OVERPOWER TRIPS AND ROD STOPS 4.2.07.4 LEVEL AMP II OUTPUT LOW (SAME AS 4.2.7.11 (SAME AS 4.2.1.!)

(SAME AS 4.2.1.2)

(SAME AS 4.2.1.2) 4.2.07.5 LEVEL AMP II TEST (SAME AS 4.2.7.1)

ANNUNCIATION (NA-1200-I(

(SAME AS 4.2.1.2)

(SAME AS 4.2.1.2) TEST/CALIBRATE SWITCH 4.2.08.1 NI-42A INPUT OPEN LOSS OF % FP INDICATION FOR NE-1207 CONTROL ROOM INDICATION NONE REQUIRED NONE 4.2.06.2 NI-42A INPUT SHORT (SAME AS 4.2.7.1)

(SAME AS 4.2.1.1 (SAkE AS 4.2.1.2)

(SAME AS 4.2.1.2)

(SAME AS 4.2.1.2) DRAWER INDICATOR, BOUNDS SHORT IN INPUT OF ANY OTHER CHANNEL 0 DEVICES ON LEVEL AMP OUTPUW 4.2.10.1 NC-42P TRIPPED CHANNEL 11 LOW-RANGE OVERPOWER TRIP ANNUNCIATION, PERIODIC TESTING NONE REQUIRED IF LOW RANGE

SELECTED, CHANNEL 11 0-10% POWER RANGE OVERPOWER BISTABLE AMP SIGNAL TO COINCIDENTOR VIA RANGE SWITCH OVERPOWER TRIPPED, LOGIC BECOMES 1/3 ON NCS-1200-4 REMAINING CHANNELS.

IF MID OR HI RANGE, NO EFFECT 4.2.0.2 NC-42P UNTRIPPED LOSS OF CAPABILITY TO TRIP.

!I PERIODIC TESTING IF LOW RANGE SELECTED, IF LOW RANGE SELECTED, CHANNEL II OVERPOWER RELAYS IN COINCIDENTOR WHEN REDUNDANT CHANNELS.

IF OVERPOWER

DISABLED, LOGIC BECOMES 2/3 ON NCS-1200-1 IS IN LOW RANGE

-MID OR HI RANGE, NONE REMAINING CHANNELS.

IF MID OR HI RANGE, REQUIRED NO EFFECT 4.2.10.1 NC-42J TRIPPED CHANNEL II MID-RANGE OVERPOWER TRIP ANNUNCIATION, PERIODIC TESTING NONE REQUIRED IF MID RANGE

SELECTED, CHANNEL 11 10-70% POWER RANGE ORPOWER BISTABLE S42NAL TO COINCIDENTOR VIA RANG SWITCH OVERPOWER TRIPPED, LOGIC BECOMES 1/3 ON AMP NCSE-200-1 REMAINING CHANNELS.

IF LOW OR HIRANGE, NO EFFECT 4.2. 10.2 NC-42J UNTRIPPED LOSS OF CAPABILITY TO TRIP &N 11 PERIODIC TESTING IF MID RANGE SELECTED, IF MID RANGE

SELECTED, CHANNEL 11 OVERPOWER RELAYS IN COINCIDENTOR WHEN REDUNDANT CNELS.

IF OVERPOWER DISABLED, LOGIC BECOMES 2/3 ON NCS-1200-L IS INMID RANGE LOW OR HI RANGE, NONE REMAINING CHANNELS.

IF LOW OR HI RANGE, REQUIRED NO EFFECT 4.2.11.O1 NC-42R TRIPPED CHANNEL ITI i-RANGE OVERPOWER TRIP ANNUNCIATION, PERIODIC TESTING NONE REQUIRED F HI RANGE

SELECTED, CHANNEL 70-120% POWER RANGE OVERPOWER ISTABLE SIGNAL TO COINCIDENTOR VIA RANGE SWITCH OVERPOWER TRIPPED, LOGIC BECOMES 1/3 ON AMP NCS-1200-1 REMAINING CHANNELS.

IF LOW OR MID

RANGE, NO EFFECT 4.2.C11.2 NC-42R UNTRIPPED LOSS OF CAPABILITY TO TRIP ON II PERIODIC TESTING IF HI RANGE SELECTED, IF HI RANGE SELECTED, CHANNEL I!

OVERPOWER RELAYS IN COINCIDENTOR WHEN REDUNDANT CHANNELS.

IF OVERPOWER

DISABLED, LOGIC BECOMES 2/3 ON NCS-1200-1 IS IN HI RANGE LOW OR MID RANGE, NONE REMAINING CHANNELS.

IF LOW OR MID REQUIRED

RANGE, ND EFFECT 4.2.12.1 NC-42M TRIPPED CHANNEL II P-7 RELAYS ACTUATED IN ANNUNCIATION REDUNDANT CHANNELS FOR P-7 DEFEAT LOGIC BECOMES 2/3, ALL SCRAM P-7 BISTABLE AMP COINCIDENTOR P-7 DEFEAT FUNCTIONS REMAIN UNAFFECTED

4. 2. 12. 2 NC-42M UNTRIPPED LOSS OF CAPABILITY TO ACTUATE CH II P-7 PERIODIC TEST REDUNDANT CHANNELS FOR P-7 DEFEAT LOGIC BECOMES 1/3, ALL SCRAM RELAYS IN COINCIDENTOR P-7 SUR SCRAM CUT-IN FUNCTIONS REMAIN UNAFFECLD 4.2.13.1 NC-42N TRIPPED CHANNEL I P-RELAYS ACTUATED IN ANNUNCIATION REDUNDANT CHANNELS FOR P-DEFEAT LOGIC BECOMES 2/3, ALL SCRAM P-B BISTALE AMP COINCIDENTOR P-8 DEFEAT FUNCTIONS REMAIN UNAFFECTED

4. 2. 13. 2 NC-42N UNTRIPPED LOSS OF CAPABILITY TO ACTUATE CH 1i P-B PERIODIC TESTING NONE REQUIRED P-8 DE 'FEAT LOGIC BECOMES 1/3, ALL SCRAM RELAYS IN COINCIDENT0R FUNCTIONS EMAIN UNAFFECTED 4.2. 14.1 NC-42K BITABLE' TRIPPED CHANNEL II DROPPED RED STOP TO ANNUNCIATION NONE REQUIRED ROD STOP SINCOINCN JDR 4.2. 14.2 NC-42K BISTABLE UINTRIPPED LOSS OF CAPABILITY TO TRIP CHANNEL 1I PERIODIC TEST REDUNDAN7 CHANNELS CHANNEL 11 DROPPED ROD STOP

DISABLED, DROPPED ROD STUP RELAYS IN COINCIDENTOR LOGIC BECOMES 1/3 ON REMAINING CHANNELS

Th Page Nc 5

11/23/88 REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS SAN ONOFRE UNIT I TABLE 4:

NIS SCRAMS AND PERMISSIVES LOCAL EFFECTS AND METHOD OF INHERENT COMPENSATING ITEM I DEVICE ID FAILURE MODE DEPENDENT FAILURES DETECTION PROVISIONS EFFECT ON RPS REMARAS 4.2.15.1 N 1207 LOW VOLTS HIGH (SAME AS 4.2.7.3)

(SAME AS 4.2.i.1)

(SAME AS 4.2.1.1)

VOLTAGE SUPL 4.2.15.2 N 1207 LOW VOLTS ZERO LOSS OF POWER TO CHANNEL I-OVERPOWER, ANNUNCIAT'ON 2.1.1)

(SAME AS 4.2.1.i)

(SANE AS 4.2.1.

VOLTAGE SUPL P-7, P-8 AND RUD STOP BISTABLES.

4.2.16.1 NC-42PJRTAI I. TRIPPED CHANNEL Ii OVERPOWER TRIP SIGNAL IN ANNUNCIATION NONE REQUIRED CHANNEL 11 OVERPOWER TRIPPED, LOGIC NC-42PJRT81CINIEiT]

4.2.16.2 NC-42PJRTA1 &

UNTRIPPED BECOXES 1/3 ON REMAINING CHANNELS 4.2162 C-2PRT1 UTRPPD OS 0CAPABI LITY FOR CHANNEL 11 PERIODIC TESTING REDUNDANT CHANNELS, CHANNEL II OVERPOWER DISABLED, LOGIC NC-42PJRTBI OVERPOWER TRIP IN COTNCIDENTOR BECOMES 2/3 ON REMAINING CHANNELS 4.2.17.1 NC-42MTAI &

TRIPPED CHANNEL 71 P-7 ACTUATION SIGNAL IN (SANE AS 4.2,121)

(SANE AS 4.2.42.1)

(SANE AS 4.2.12.1)

P-7 RELAYS NC-42MTB1 COINCIDENTOR 4.2.17.2 NC-42MTA, &

UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL I P-7 (SAME AS 4.2,12.2)

(SANE AS 4.2.12.2)

NC-42MTB1 ACTUATION IN COINCIDENTOR 4.2.18.1 NC-42NTAI &

TRIPPED CHANNEL 1IP-B ACTUPTION SIGNAL IN (SAME AS 4.2,13.1)

(SANE AS 4.2.13.1)

P-8 RELAYS NC-42NTB1 COINCIDENTOR 4.2.18.2 NC-42NTA1 &

UNTRIPPED LOSSOF CAPABILITY FOR CHANNEL II P-B (SANE AS 4.2.13.2)

(SAE AS 4.2.13.2)

(SANE AS 4.2.13.2)

NC-42NTB1 ACTUATION IN COINCIDENTOR 4.2.19.1 NC-42PJRXA192 & TRIPPED CHANNEL 1l OVERPOWER TRIP IN (SAME AS 4.2.16.1)

(SANE AS 4.2.16.1)

(SAME AS 4.2.16.1)

BOTH OVERPOWER SCRAM COINCIDENTOR A & El NC-42PJRXBI&2 COINCIDENTOR RELAYS MUST TRIP FOR CHANNEL TRIP TO 4.2.19.2 NC-42PJRXAI&2 & UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL II (SANE AS 4.2.16.21 (SANE AS 4.2.16.2)

(SAME AS 4.2.16.2)

NC-42PJRXB12 OVERPOWER TRIP IN COINCIDENTOR 4.2.20.1 NC-42MXA TRIPPED CHANNEL 1i P-7 TRIP IN COINCIDENTOR (SAME AS 4.2. 17.1)

(SAME AS 4.2. 17. 1)

(SAME AS 4.2.17.1)

BOTH P-7 COINCIDENTOR A & B"RELAYS MUST.

NC-42MXB 4.2.20.2 NC-42MXA UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL 1I P-7 (SAME AS 4.2.17.2)

(SANE AS 4.2.17.2)

(SAME AS 4.2.17.2)

NC-42MXB ACTUATION IN COINCIDENTOR 4.2.21.1 NC-42NXA &

TRIPPED CHANNEL IP-B TRIP IN CIINCIDENTOR (SAME AS 4.2.18.1)

(SAME AS 4.2.18.1)

(SANE AS 4.2.18.1)

BOTH P-B COINCIDENTOR RELAYS A & B MUST NC-42NXB TRIP FOR CHANNEL TRIP TO OCCUR 4.2.21.2 NC-42NXA &

UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL l1P-8 (SAME AS 4.2.18.2)

(SAME AS 4.2.18.2 NC-42NXB ACTUATION IN COINCIDENTOR 4.2.22.1 NC-42KXA &

TRIPPED CHANNEL II DROPPED ROD STOP IN ANNUNCIATION NONE REQUIRED ROD STOP BOTH DROPPED ROD STOP A & B RELAYS NC-42KXB COINCIDENtOR TRIP FOR CHANNEL TRIP TO OCCUR 4.2.22.2 NC-42KXA &

UNTRIPPED LOSS OF CAPABILITY FOR CANNEL Ii PERIODIC TEST REDUNDANT CHANNELS CHANNEL 11 DROPPED ROD STOP NC-42KXB

IDIAL, NC421BDROPPED ROD STOP -N CINCiDENTOR LOGIC BECOMES 1/3 ON REMAINING CHANNELS 4.2.23.1 REG SUPL II VOLTS ZERO OR LOSS OF POWER TO CHANNEL

!I (N-1204 AND CONTROL ROOMINDICATION, (SAME AS 4.2.1.1)

(SAME AS 4.2.1.1) REACTOR TRIP ON (SAME AS 4.2.1.1)

(NIS)

GROUNDED N-i207) HIGH, LOW AND AUX VOLTAGE ANNUNCIATION CHANNEL 11 HIGH SUR IF P-7 IS ON SUPPLIES AND 10 STABLES 4.3.01.1 NE 1206A SIGNAL HIGH HIGH SUCHANNEL FLUX SIGNAL (LOOP CONTROL ROOM INDICATION, NONE RELWIRED FOR CHANNEL III OVERPOWER

TRIPPED, OGIC P-7 DEFEAT AND P-B DEFEAT LOGIC BECOME DETECTOR CURRENT)

O SHUNT TO CHANNEL III ANNUNCIATION, PERIUDIC TESTING OVERPOWER

TRIPS, BECOMES 1/3 O REMAINING CHANNELS. 1/3 ON REMAINING CHANNELS S,ING AMP TO LEVEL AMP ANALOG OUTPUTS REDUNDANT CHANNELS FOR CHANNEL

!I DROPPED ROD STOP

DiSABLED, LAG AMP, B/S AMPS FOR P-7, P-8, P-7, P-B, DROPPED ROD LOGIC BECOMES 113 ON REMAINING CHANNELS OVERPOWER TRIPS AND ROD STOPS.

HING RATE STOP SIGNAL MAY ALSO BE SENT TO ROD CONTROL VIA I/N-48A AND DIFFERENTIATER 4.3.01.2 NE 1206A SIGNAL LOW LOW SUBCHANNEL FLUX SIGNAL (LOOP (SAME AS 4.3.1.1)

REDUNDANT CHANNELS FOR CHANNEL III OVERPOWER AND DROPPED ROD P-7 DEFEAT AND P-B DEFEAT LOGIC BECOyNE DETECTOR CURRENT) TO SHUNT TO CHANNEL III:

OVERPOWER TRIPS ARE STOP

DISABLED, LOGIC BECOMES 2/3 AND 1/3 Z21/3 ON REMAINING CHANNELS SUMING AMP TO LEVEL AMP TO ANALOG DROPPED ROD STOP, NONE RESPECTIVELY ON RMAINING CHANNELS OUTPUTS LAG AMP, B/S AMPS FOR P-7, P-8, REQUIRED FOR P-7, P-B OVERPOWER TRIPS, AND ROD STOPS.

NEGATIVE R7A SIGNAL MAY CAUSE DROPPED ROD ROD STEP

Page No.

6 11/23/88 REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS SAN ONOFRE UNIT I TABLE 4:

NIS SCRAMS AND PERMISSIVES LOCAL EFFECTS AND METHOD OF INHERENT COMPENSATING ITEM #

DEVICE ID FAILURE MODE DEPENDENT FAILURES DEIECTION PROVISIONS EFFECT ON RPS REMARKS 4.3.02.1 NE 1206A SHUNT OPEN (SAME AS 4.3.1.2)

(ANAS 4.3.1.1)

(SAME AS 4.3.2)

(SAME AS 43)

(SAME AS 4.3.i.2) 4.3.02.2 NE 1206A SHUNT SHORT (SAE AS 4.3.1.1)

SAME AS 43.1.1)

SAYE AS 1.3.1.1)

(SAME AS 4.3.1.1)

(SAE AS 4.3.1.1) 4.3.03.1 NE 12068 SIGNAL HIGH (SAE AS 4.3,1.1(

(SAME AS 4.3.!.!)

(SAKE AS 4.3.1.1)

(SME AS 4.3.1.1)

(AME AS 4.3.1.

4.3.03.2 NE 12069 SIGNAL LOW AS 4.1 (SAME AS 4.3.1.2)

(AME AS 4.3.1.')

4.3.04.1 NE 12068 SHUNT OPEN SANE AS 4.3.i2)

(SAME AS 4,3.1.1)

SAME S 4.3.1.2)

(SAME AS 43.1.21 (SANE AS 4.3.1.2) 4.3.04.2 NE 1206B SHUNT SHORT (SAME AS 4.311.1)

(SAME AS 4.3.1.1)

(SAE AS 4.3.1.11 4.3.05.1 NE 1206AAB HIGH VOLS HIGH (AE AS 4.3.1.1 (S A S 4.3.1.)

(ANE S 4.3.1.1)

(SAE AS 4.3.1.11 (SANE AS 4.3..1)

VOLTAGE SUPL 4.3.05.2 NE 1206A&B HIGH VOLTS ZERO (SANE AS 4.3.1.2)

(SAME AS 4.3.1.))

(SAE AS 4.3.1.21 (SAE AS 4.3.1.2)

SAE AS 4.3.1.2)

VOLTAGE SUPL 4.3.06.1 SUMMING AMP III OPEN (SANE PS 4.3.1.2)

(SAME AS 4.3.1.1)

(SAME AS 4.3.1.2)

(SAE AS 4.3.1.21 4.3.06.2 SUMMING AMP III HRT AME AS 4,3.1.t)

(SAE AS 4.3..)

(SAME AS 4.3.1.1)

(SHOE AS 4.3.1.11 (SAE AS 4.3.1.11 4.3.07.1 LEVEL AMP III INPUT OPEN LOW CHANNEL III FLUX SIGW, TO ANALOG (SAME AS 4,11)

(SANE AS 4.3.1.2)

(SAME AS 4,11.2)

(SAME AS 4.3.1.21

TPUTS, LAG AMP E/S AMPS FOR P-7, P-O OVERPOWER TRIPS AND ROD STOPS 4.3.07.2 LEVEL AMP III NPUT SHORT (SAMEAS 4.3.7.1) LP iR ENT MAY (SAE AS 4.3.1.1)

(ME AS 4.3.1.2)

(SAME AS 4.3.1.2)

HSAGE AS 4.3.1.2)

INCREASE AND RESULT IN HIGFH RATE SIGNAL To ROD CONTROL I/N-48P. AND 4.3.07.3 LEVEL AMP III OUTPUT HI GH HIG-H CHAINNEL IlI FLUX SIGNAL To ANALOG, (SAME AS 4. 3. 1.1)

(SANE AS 4.3.1.1)

(SAME AS 4.3.1.1)

(SANE AS 4.3. 1.1 OUTPU TS, LAG AMP, 8/S AMPS FOR P-7, P-B, OVERPOWER TRIPS AND ROD STOPS 4.3.07.4 LEVEL AMP III OUTPUT LOW (SAE AS 4.3.7.11 (AE AS 4.3..1)

(SAE AS 4.3.1.2)

(SAME AS 4.3.1.2)

(SAE AS 4.3.1.2) 4.3.07.5 LEVEL AMP Il TEST (SAE AS 4.3.7.1 ANNUNCIATION (NA-200-1 (SAME AS 4.3.1.2 (SAE AS 4.3. 1.2 (SAE AS 4.3. 1.

EST/CALIBRATE SWICH 4.3.08.1 NI 43A INPUT OPEN LOSS OF % FP INDICATION FOR NE-12%

CONTROL ROOM INDICATION NONE REQUIRED NONE 4.3.08.2 NI 43A INPUT SHORT (SAE AS 4.3.7.1)

(SAE AS 4.3.1.1)

(SAME AS 4.3.1.2)

E AS 4.3.1.01 DRAWER INDICATOR, POUNDS SHORT IN INPUT OF ANY OTHERl 4.3.03.1 NC-43P BISTABLE TRIPPED CHANNEL I11 LOW-RNGE OVERPOWER TRIP ANNUNCIATION, PERIODIC TESTIkG NONE REQUIRED IF LOW RANGE

SELECTED, CHANNEL 111 0-10% POWER RANGE OVERPOWER BTSLE AMP SIGNAL TO COINCIDENTOR VIA RANGE SWITCH OVERPOWER TRIPPED, LOGIC BECOMES 1/3 ON N4S-1200-1 REMAINING CHANNELS. IF MID OR HI RANGE, NO EFFECT 4.3.09.2 NC-43P BISTABLE UNTRIPPED LOSS OF CPABILITY TO TRIP CH III PERIODIC TESTING IF LOW RANGE SELECTED, IF LOW RANG SELECTED, CHANNEL Ill OVERPOWER RELAYS IN COINCIDENTOR WHEN REDUNDANT CHANNELS.

IF OVERPOWER

DISABLED, LOGIC BECOMES 213 ON NCS-1200-: IS IN LOW RANGE MID DR HI RANGE, NONE REMAINING CHANNELS. IF MID OR HI RANGE, RE AUIRED2NO EFFECT 4.3. 10.1 NC-43J PISTAGLE TRIPPED CHANNEL i1l IMID-RANGE OVERPOWER TRIP ANWNNIATION, PERICDIC TESTING NONE REQUIRED IF MID RANGE

SELECTED, CHANNEL Ill 10-70% POWER RANGE OVERPOWER BISTABLE SIGNAL TO COlINCIDENTOR VIA RANGE SWITCH OVERPOWER TRIPPED, LOGIC BECOmES 1/3 ON AM P NCS-1200-REMAINING CHANNELS. IF LOW OR HI RANGE, NO EFFECT 4.3.10.2 NC-43J BISTABLE UNTRIPPED LOSS OF CAPABILITY TO TRIP CH II PERIODIC TESTINGIF MID RANGE SELECTED, IF MID RANGE

SELECTED, CHANNEL OVERPOWER RELAYS IN COINCIDENTOR WHEN REDUNDANT CHANNELS.

IF OVERPOWER

DISABLED, LOGIC BECOMES 2/3 ON NCS-1200-1 IS IN MID RANGE LOW OR HI RANGE, NONE REMAINING CHANNELS.

IF LOW OR HI RANGE, REQUIRED NO EFFECT 4.3.11.1 NC-43R BISTABLE TRIPPED CHANNEL III HI-RANGE OVERPOWER TRIP ANNUNCIATION, PERIODIC TESTING NONE REQUJIRED IF HI RANGE

SELECTED, CHANNEL Ill

.70-120% POWER RANGE OVERPOWER BISTABLE SIGNAL TO COINCIDENTOR VIA RANGE SWITCH OVERPOWER TRIPPED, LOGIC BECOMES 1/3 ON AMP j.NCS-120C0-l REMAINING CHANNELS.

IF LOW OR MID U'R, NO EFFECT

Page No.

7 11/23/88 REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS SAN DNOFRE UNIT I TABLE 4:

NIS SCRAMS AND PERMISSIVES LOCAL EFFECTS AND METHOD OF INHERENT COMPENSATING ITEM 8 DEVICE ID FAILURE MODE DEPENDENT FAILURES DETECTION PROVISIONS EFFECT ON RPS REMARKS 4.3.11.2 NC-43R BISTABLE UNTRIPPED LOSS OF CAPABILITY TO TRIP CH III PERIODIC TESTING IF HI RANE SELECTED, IF HI RANGE

SELECTED, CHANNEL I

OVERPOW~ER RELAYS IN COiNCIDENTOR WHEN RELDUNOANT CHANNEL S. IF OVERPOWER DISABLELICBOMS/3N 4.3.12.1-NC43 IITNL TRIPPED

,LGI ECME

/3O NCS2001 S I H RAuELOW OR MID RANGE, NONE REMAINING CHANNELS, IF LOW OR MID REGUIRED

RANGE, NO EFFECT 4.3.12.1 NC-43M BISTABLE TRIPPED CHANNEL !!I P-7 RELAY IN COINCIDENTOR ANNUNCIATION REDUNDANT CHANNELS FOR P-7 DEFEAT LOGIC BECOMES 2/3, ALL SCRPM P-7 BISTABLE AMP ACTUATED P-7 DEFEAT FUNCTIONS REMAIN UNAFFECTED 4.3. 12.2 NC-43M BISTALBE UNTRIPPED LOSS OF CAPABILITY TO ACTUATE

'H III P-7 PERIODIC TESTING REDUNDANT CHANNEL-S FOR P-7 DEFEAT LOGIC BECOMES 1/3, ALL SCRAM RELAYS IN COINCIDENTOR P-7 SUR SCRAM, CUT-IN FUNCTIONS REMAIN UNAFFE CED 4.3.13.1 NC-43N BiSTABLE TRIPPED CHANNEL I11 P-8 RELAY IN COINCIDENTOR ANNUNCIATION REDUNDANT CHANNELS FOR P-8 DEFEAT LOGIC BECOMES 2/3, ALL SCRAM P-8 BISTABLE AMP ACTUATED P-8 DEFEAT FUNCTIONS REMAIN UNAFFECTED 4.3.13.2 NC-43N BISTABLE UNTRIPPED LOSS OF CAPABILITY TO ACTUATE CH III P-8 PERIODIC TESTING NONE REQUIRED P-8 DEFEAT LOGIC BECOMES 113, ALL SCRAM RELAYS IN COINCIDENTOR FUNCTIONS REMAIN UNAFFECTED 4.3.14.1 NC-43K BISTABLE TRIPPED CHANNEL I! DROPPED ROD STOP SIGNAL TO ANNUNCIATION NONE REQUIRED ROD STOP COINCIDENTOR 4.3.14.2 NC-43K BISTABLE UNTRIPPED LOSS OF ABILITY TO TRIP CHANNEL iI PER T DROPPED ROD STOP RELAYS INCOINCiDENTOR LOGIC

!/3 ON REMAINING CHANNELS 4.3.15.1 N 1206 LOW VOLTS HIGH (SAME AS 4.3.7.3)

(SAME AS 4.3.1.1)

VOLTAGE SUPL 4.3.15.2 N 1206 LOW VOLTS ZERO LOSS OF POWER TO CHANNEL III OIERPOWER.

ANNUNCIATION (SAME AS 4.3.1.1 (SAME kq 4.3.1.

VOLTAGE SUPL P-7, P-8 AND ROD STOP BISTABLES.

4.3.16.1 NC-43PJRTAI &

TRIPPED CHANNEL III OVERPOWER TRIP SIGNAL IN ANNUNCIATION (NCS-I200-6)

NONE REQUIRED CHANNEL III OVERPOWER

TRIPPED, LOGIC NC-43PJRTBI COINCIDENTO BECOMES 1/3 ON REMAINING CHANNELS 4.3.16.2 NC-43PJRTAI &

UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL III PERIODIC TESTING REDUNDANT CHANNELS CHANNE 111 OVERPOWER DISABLED, LOGIC NC-43PJRTB1 OVERPOWER TRIP IN COINCIDENTOR BECOMES 2/3 ON REMAINING CHANNELS 4.3.17.1 NC-43MTA TRIPPED CHANNEL III P-7 ACTUATION SIGNAL IN (SAME AS 4.3.12.1)

(AME AG 4.3.12.11 (SAME AS 4.3.12.1)

P-7 RELAYS NC-43MTBI COINCIDENTOR 4.3.17.2 NC-43MTR1 I

UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL III P-7 (SAME AS 4.3.12.2)

(SAME AS 4.3.12.2)

NC-43MTBI ACTUATION IN COINCIDENTOR 4.3.18.1 NC-43NTAl A TRIPPED CHANNEL III P-8 ACTUATION SIGNAL IN (SAME AS 4.3.13.1)

(SAME AS 4.3.13.1)

P-8 RELAYS NC-43NTB1 COINCIDENTOR 4.3.18.2 NC-43NTA1 &

UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL III P-B (SAME AS 4.3.13.2)

(SAME AS 4.3.13.21 (SAE AS 4.3.13.2)

NC-43NTB1 ACTUATION IN COINCIDENTOR 4.3.19.1 NC-43PJRXAI&2 4 TRIPPED CHANNEL III OVERPOWER TRIP IN (SAME AS 4.3.16.11 (SAME AG 4.3.16.1)

(SAME AS 4.3.16.1)

BOTH OVERPOWER SCRAM COINCIDENTOR A

NC-43PJRXBI&2 COINCIDENTR RELAYS MUST TRIP FOR CHANNEL TRIP TO OCCUR 4.3.19.2 NC-43PJRXAlt2 4 UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL

!!I (SAME AS 4.3. 16.21 (SAME AS 4.3.16.2)

(SAME AS 4.3.16.2)

NC-43PJRXBI&2 OVERPOWER TRIP IN COINCIDENTOR 4.3.20.1 NC-43MXA I

TRIPPED CHANNEL III P-7 TRIP IN COINCIDENTOR (SAME AS 4.3.17.11 (SAME AS 4.3.17.1)

(SAME AS 4. 3. 17. 1)

BOTH P-7 COINCIDENTOR A & B RELAYS MUST NC-43MXB TRIP FOR CHANNEL TRIP TO OCUR 4.3.20.2 NC-43MXA 4

UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL III P-7 (SAME AS 4.3.17.21 (SAME AS 4.3. 17.2)

(SAME AS 4.3. 17.2)

NC-43MXB ACTUATION IN COINCIDENTOR 4.3.21.1 NC-43NXA.&

TRIPPED CHANNEL III P-8 TRIP IN COINCIDENTOR (SAKE AS 4.3.18.11 (SAME AS 4.3-18.1)

(SAME AS 4.3.18.1)

BOTH P-8 COINCIDENTOR A & B RELAYS MUST NC-43NXB TRIP FOR CHANNEL TO OCCUR 4.3.21.2 NC-43NXA UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL III P-8 (SAME AS 4.3.18.2)

(SAME AS 4.3.121 (SAME AS 4.3.18.2)

(SAME AS 4.3.18.21 NC-43NXB ACTUATION IN COINCIDENTOR 4.3.22.1 NC-43KXA TRIPPED CHANNEL III DROPPED ROD STOP IN ANNUNCIATION NO REQUIRED ROD STOP BOTH DROPPED ROD STOP A 9 B RELAYS MUST NC-43KXB COINCIDENTOR TRIP FOR CHANNE TRIP TO OCURR k1.22.2 NC-43KXA A

UNTRIPPED LOSS OF CAPABILITY FOR TRIPEL III PERIODIC TEST REDUNDANT CHANNELS CHANNEL III DROPPED ROD STP DISABLED, NC-43KXB DROPPED ROD STOP IN OINCIDENTOR LOGIC BECOMES 1/3 ON REMAINING CiNELS

Page No.

8 11/23/88 REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS SAN ONOFRE UNIT I TABLE 4:

NIS SCRAMS AND PERMISSIVES LOCAL EFFECTS AND METHOD OF INHERENT COMPENSATING ITEM #

DEVICE iD FAILURE NODE DEPENDENT FAILURES DETECTION PROVISIONS EFFECT ON RPS REMARAS 4.3.23.1 REG SUPL III VOLTS ZERO OR LOSS (F POWER TO CHANNEL III (N-1208)

L T

(NIS)

GROUNDED HIGH AND LOW VOLTAGE SUPPLIES.

ANNUNCIATION 4.4.01.1 NE 1208A SIGNAL HIGH HIGH SUBCHANNEL FLUX SIGNAL (LOOP CONTROL ROOM INDICATION, NONE REQUIRED FOR CHANNEL IV OVERPOWER TRIPPED, LOGC P-7 DEFEAT AND P-8 DEEAT OGIC BECOE CURRENT)

TO SHUNT TO CHANNEL IV:

ANNUNCIATION, PERIODIC TESTING OVERPOWER TRIPS, BECOMES / ON REMAININ CHANNELS. 1/3 ON REMAININGOPEL SUKAING AMP TD LEVEL AMP TO ANALOG REDUNDANT CHANNELS FOR CHANNEL IV DROPPED ROD STOP

DISABLED, OUTP-UTS, LAG AMP, B/S AMPS FOR P-7, P-8, P-7, P-B, DROPPED ROD LOGIC BECOMES 1/3 IN REMAINING CH ANNELS.

OVERPOWER TRIPS AND ROD STOPS STOP 4.4.01.2 NE 1208A SIGNAL LOW LOW SUBCHANNEL FLUX SIGNAL (LOOP (SANE AS 4.4.1.1)

RDUNDANT CHANNELS FOR CHANNEL IV OVERPOWER AND DROPPED ROD P-7 DEFEAT AND P-8 DEFEAT LOGIC BECOME CURRENT)

TO SHUNT TO CHANNEL IV:

OVERPOWER TRIPS AND STOP DISABLED, LOGIC BECOMES 2/3 AND 1/3 2/3 ON REMAINING CHANNELS SUMMING AMP TO LEVEL AMP TO ANALOG DROPPED ROD

STOP, NONE RESPECTIVELY ON REMAINING CHANNELS

OUTPUTS, LAG AMP, B/S AMPS FOR P-7, P-8, REQUIRED FOR P-7, P-8 OVERPOWER TRIPS AND ROD STOPS.

NEGATIVE RATE SIGNAL MAY CAUSE DROPPED ROD STOP 4.4.04.1 NE 1208A SHUNT OPEN (AME AS 4.4.1.2)

(SAME AS 4.4.1.1)

(SAME AS 4.4.1.2)

(SAME AS 4.4.1.2) 4.4.02.2 NE 1208A SHUNT SHORT (SAME AS 4.4.1.1(

(SAME AS 4.4.1.1)

(SAE AS 4.4.1.1)

(SAE AS 4.4.1.1) 4.4.05.1 NE 1208AB H IGL HIGH(SMAS4,11(A,

4..3 1 E I OB I NA I H(S M S...)

S M AS 4.4. 1.

1)

(SAME AS 4.4.1.1)

(SAME AS 4.4.1.1) 4.4.03.2 NE 1208B SIGNAL LOW (SANE AS 4.4.1.2)

(SAME AS 4.4.1,1)

(SAME AS 4.4.1.2)

(SANE AS 4.4.1.2)

(SAME AS 4.4.1.2) 4.4.04.1 NE 1208B SHUNT OPEN (SAME AS 4.4.1.2)

(SAIME AS 4. 4.

1.1)

(SAME AS 4.4.1.2)

(GAME AS 4.4.1.2)

(SAME AG 4.4.

1.2) 4.4.04.2 NE I208B SHUNT SHORT (GAME AS 4.4.1.1)

(SAME AS 4.4.1.1)

(SANE AS 4.4.1.1)

(SAME AS 4.4.1.1) 4.4.05.1 NE I20BA&B HIGH VOLTS HIGH (SAME AS 4.4.1.1)

(SAME AS 4.4.1.1)

(SAKE AG 4.4.1.1)

(SAME AS 4.4.1.1)

VOLTAGE SUPL 4.4.05.2 NE 120BA&B HIGH VOLTS ZERO (SAME AS 4.4.1.2)

(SAE AS 4.4.1.1)

(AME AS 4.4.1.2)

(SAME AS 4.4.1.2)

VOLTAGE SUPL 4.4.06.1 SUMMING PMP IV OPEN (SAME AS 4.4.1.2)

(SAME AS 4.4.1.1)

(SAE AS 4.4.1.2)

-(AME AS 4.4.1.2)

(SAME AS 4.4.1.2 4.4.06.2 SUMMING AMP IV SHORT (SAME AS 4.4.1.1)

(SAME AS 4.4.1.1)

(SAE AS 4.4.1.)

(SAE AS 4.4.1;1)

(SAME AS 4.4.1.1) 4.4.07.1 LEVEL AMP IV INPUT OPEN LOW CHANNEL IV FLU) SIGNAL TO ANALOG (SAME AS 4.4.1.1)

(SAE AS 4.4.1.2)

(SAME AS 4.4.1.2)

(SAE AS 4.4.1.2)

OUTPUTS, LAG AMP, B/S AMPS FOR P-7 P-8, OVERPOWER TRIPS AND ROD STOPS 4.4.07.2 LEVEL AMP IV INPUT HORT (SAME AS 4.4.7.1) LOOP CURRENT MAY (SAME AS 4.4.1.1)

(SAME AS 4.4.1.2)

INCREASE, RESULTING 4N HIGH RATE SIGNAL TO ROD CONTROL VIA I/N-48A AND DIFFERENTiATOR 4.4.07.3 LEVEL AMP IV OUTPUT HIGH HIGH CHANNEL IV FLUX SIGNAL TO ANALOG (SAME AS 4.4.1.1)

(SAME AS 4.4.1.1)

OUTPUTS, LAG AMP, B/S LAMPS FOR P-7, P-D, OVERPOWER TRIPS AND ROD STOPS 4.4.07.5 LEVEL AMP IV TEST (SAME AS 4.4.7.1)

ANNUNCIATION (NA-1200-1(

(SAME AS 4.4.1.2)

(SAME AS 4.4.i.2)

(SANE AS 4.4.1.2) TEST/CALIBRATE SWITCH 4.4.08.1 NI 44A INPUT OPEN LOSS OF % FP INDICATION FOR NE-1208 CONTROL ROOM INDICATION NONE REQUIRED NONE

4. 4.OB. 2 NI 44A INPLUT SHORT (SAME AS 4. 4.7.)

(SAME AS 4.4.7.1)

(SANE AS 4.4.7.1)

(SAME AS 4.4.7.1) BOUNDS SHORT IN INPUT OF ANY OTHER CHANNEL IV DEVICES ON LEVEL U NAMP OUTPUT 4.4. 09.O1 NC-44P BISTABLE TRIPPED CHANNEL IV LOW-RANGE OVERPOWER TRIP ANNUNCIATION, PERIODIC TESTING NONE REUIRED IF LOW RANGE

SELECTED, CHANNEL IV 0-10% POWER RANGE OVERPOWER BISTABLE AMP SIGNAL TO COINCIDENTOR VIA RNGE SWITCH OVERPOWER TRIPPED, LOGIC BECOMES 1/3 ON NCS-1200-1 REMAINING CHANNELS.

IF MID OR HI RANGE, NO EFFECT 4.4.09.2 NC-44P BISTABLE UNTRIPPED LOSS OF CAPABILITY TO TRIP CHANGE IV PERIODIC TESTING IF LOW RANGE SELECTED, IF LOW RANGE

SELECTED, CHANNEL IV OVERPOWER RELAYS IN COINCIDENTOR WHEN REDUNDANT CHANNELS.

IF OVERPOWER

DISABLE, LOGIC BECOMES 2/3 ON NCS-1200-1 IS IN LOW RANGE MID OR HI RANGE, NONE REMAINING CH1ANNELS.

IF MID OR HI RANGE, REQUIRED NO EFFECT

11/23/AS REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS SAN ONOFRE UNIT I TABLE 4:

NIS SCRAMS AND PERMISSIVES LOCAL EFFECTS AND METHOD OF INHERENT COMPENSATING ITEM #

DEVICE ID FAILURE MODE DEPENDENT FAILURES DETECTION PROVISIONS EFFECT ON RPS REMARKS 4.4,10.1 NC-44J BISTABLE TRIPPED CHANNEL IV MID-RANGE OVERPOWER TRIP ANNUNCIATION, PERIODIC TESTING NONE REQUIRED IF MID RANGE

SELECTED, CHANNEL IV 10-70% POWER RANGE OVERPOWER BISTABLE SIGNAL TO COINCIDENTOR VIA RANGE SWITCH OVERPOWER TRIPPED, LOGIC BECOMES 1/3 ON AMP NCS-1200-4 REMAINING CHANNELS. IF LOW OR HI RANGE, 4.4.10.2 NC-44J BISTABLE UNTRIPPED LOSS OF CAPABILITY TO TRIP CHANNEL IV PERIODIC TESTING IF MID RANGE SELECTED, IE 4.413.

NC-44 BISTABL TRPPEDCHANEI OVERPOWER RELAYS IN COINCIDENTOR WHEN REDUNDqlNT CHANNELS. I F OVERPOW1ER

DISABLED, LOGIC BECOMES 2/3 ON NCS-12O0-l IS IN MID RANGE LOW UR HIl RANGE, NONE REMAINING CHANNELS.' IF LOW OR HI RANGE, RE44IRED NO EFFECT 4.4.11.1 NC-44R BISTABLE TRIPPED CHANNEL IV Hi-RANGE OVERPOWER TRIP ANNUNCIATION, PERIODIC TESTING NONE REQUIRED IF HI RANGE SELECTED, CHANNEL IV 7&-120% POWER RANGE OVERPOWER BI'ABLE SIGNAL TO COINCDENTOR VIA RANGE SWITCH OVERPOWER TRIPPED, LOGIC BECOMES 1/3 ON AMP NCS-1200-4 REMAINING CHANNELS.

IF LOW OR MID

RANGE, NN EFFECT 4.4.11.2 NC-44R BISTABLE UNTRIPPED LOSS OF CAPABILITY TO TRIP CHANNEL IV PERIODIC TESTING IF HI RANGE SELECTED IF HI RANGE SELECTED, CHANNEL IV OVERPOWER RELAYS IN COINCIDENTOR WHEN REDUNDANT CHANNELS.

'IF, OVERPOWER DISABLED, LOGIC BECOMES 2/3 ON NCS-1200-1 IS IN HI RANGE LOW OR MID RANGE, NONE REMAINING CHANNELS.

IF LOW OR MID 4.4.1.1REQUIRED

RANGE, NO EFFECT 4. 4 1 2. 1 N

-4 4 B S T A L E R I P E DC H N C N L I O P R E A S C T T D I NN U C A I O R E D U N D A N T C H A N N E L S F O R P -7 D E F E A T L O G IC B E C O M E S 2 3, A L L S C R A M P -7 B IS T A B L E A M P P-7 DEFEAT FUNCTIONS REMAIN UNAFFECTED 4.4.12.2 NC-44M BISTABLE UNTRIPPED LOSS OF CAPABILITY TO ACTUATE CHANNEL IV PERIODIC TESTING REDUNDANT CHANNELS FOR P-7 DEFEAT LOGIC BECOMES 1/3, ALL SCRAM P-7 RELAYS IN CtIINCIDENTOR P-7 SUR SCRAM CUT-IN FUNCTIONS REMAIN UNAFFECTED 4.4.13.1 NC-44N BISTABLE TRIPPED CHANNEL IV P-RELAYS ACTUATED IN ANNUNCIATION REDUNDANT CHANNELS FOR P-DEFEAT LOGIC BECOMES 2/3, ALL SCRAM P-BISTABLE AMP COINCIDENTOR P-8 DEFEAT FUNCTIONS REMAIN UNAFFECTED 4.4.13.2 NC-44N BISTABLE UNTRIPPED LOSS OF CAPABILITY TO ACTUATE CHANNEL IV PERIODIC TESTING NONE REQUIRED P-8 DEFEAT LOGIC BECOMES 1/3, ALL SCRAM P-8 RELAYS IN COINCIDENTOR FUNCTIONS REMAIN UNAFFECTED 4.4.14.1 NC-44K BISTABLE TRIPPED CHANNEL IV DROPPED RODSTOP SIGNAL TO ANNUNCIATION NONE REQUIRED ROD STOP COITNCIDENTOR 4.4.,14.2 NC-44(( BISTABLE UNTRIPPED LOSS OF CAPABILITY TO TRIP CHANNEL IV PERIODIC TEST REDUNDANT CHANNELS CHANNEL IV DROPPED ROD STOP DISABLED DROPPED ROD STOP RELAYS IN CINCIDENTOR LOGIC BECOMES 1/3 ON REMAINING CHANNELS 4.4.1.1TN AB LC (SAME AS 4.4.7.31 (SAME AS 4.4.1.1)

(SAME AS 4.4.1.1)

(SAME AS 4.11.1)

(SAME AS 4.1.1.1 4.4.15.2 N 1208 LOW VOLTS ZERO LOSS OF POWER TO CHANNEL IV OVERPOWER.

ANNUNCIATION (SAME AS 4.4.1.1)

(SAME AS 4. 4. 1.1)

(SAME AS 4.4.1.1)

VOLTAGE SUPL P-7, P-B AND ROD STOP BISTABLES.

4.4.16.1 NC-44PJRTAI I TRIPPED CHANNEL IV OVERPOWER TRIP SIGNAL IN ANNUNCIATION (NCS-I200-6)

NONE REQUIRED CHANNEL IV OVERPOWER TRIPPED, LOGIC S4PRTICINAL ETO CICDNO IARNESIC 4..62NC-44PJRTAI &ONIDNO BECOMES 1/3 ON REMAINING CHANNELS 4.4.. PR &

UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL IV PERIODIC TESTING REDUNDANT CHANNELS CHANNEL IV OVERPOWER

DISABLED, LOGIC NC-44PJRTB1 OVERPOWER TRIP IN COINCIDENTOR BECOMES 2/3 ON REMAINING CHANNELS 4.4.17.1 NC-44MTAI 8 TRIPPED CHANNEL IV P-7 ACTUATION SIGNAL IN (SAME AS 4.4.12.1)

(SAME AS 4.4.12.1)

P-7 RELAYS NC-44KTBI COINCIDENTOR 4.4.17.2 NC-44MTAI I UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL IV P-7 (SAME AS 4.4.12.2)

(SAME AS 4.4.2.2)

(SAME AS 4.4.12.2)

NC-44MTBI ACTUATION IN COINCIDENTOR 4.4.18.1 NC-44NTAI A TRIPPED CHANNEL IV P-8 ACTUATION SIGNAL IN (SAME AS 4.4.13.1)

(SAME AS 4.4. 13.11 (SAE AS 4.4.13.1)

P-B RELAYS NC-44NTBI COINCIDENTOR 4.4.18.2 NC-44NTAI &

UNTRIPPED CHANNEL IV P-B ACTUATION SIGNAL IN (SAME AS 4.4.13.1)

(SAME AS 4.4.13.1)

(SAME AS 4.4.13.1 NC-44NTBR COINCIDENTOR

4. 4.19. 1 ?I-44PJRXAI&2 4TRIPPED CHANNEL IV OVERPOWER TRIP IN (SAME AS 4.4.16.1)

(E AS 4.4.16.1)

(SAME AS 4.4.16.1)

BOTH OVERPOWER SCRAM COINCIDENTOR A

EDB NC-44PRXB1.

P-7 DEFEATO VPEIDRRELAYS MUST TRIP FOR CHANNEL TRIP TO P-7 SU SCRAOCCTUI 4.4.1.2 NE-44PJRXAD&2 C

LUNTRIPPED LOSS OF CAPABILITY FOR CHANNEL IV (SAME AS 4.4.16.2)

(SAME AS 4.4.16.2)

NE-44PJRXB192 OVERPOWER TRIP IN COINCIDENTOR

Page No.

10 11/23/88 REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS SAN ONOFRE UNIT I TABLE 4:

NIS SCRAMS AND PERMISSIVES LOCAL EFFECTS AND METHOD OF INHERENT COMPENSATING ITEM #

DEVICE ID FAILURE MODE DEPENDENT FAILURES DETECTION PROVISIONS EFFECT ON RPS REMARKS 4.4.20.1 NC-44MXA TRIPPED CHANNEL IV P-7 TRIP IN COINCIDENTOR (SAME AS 4.4.1(7.1)

(SAME AS 4.4.17.1)

BOTH P-7 COINCIDENTOR A &B RELAYS MUST __

NC-44MXB TRIP FOR CHANNEL TRIP TO OCCUR 4.4.20.2 NC-44MXA UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL IV P-7 (SAME AS 4.4.17.2)

(SAME AS 4.4.17.2)

NC-44MXB ACTUATION IN COINCIDENTOR 4.4.21.1 NC-44NXA &

TRIPPED CHANNEL IV P-8 TRIP IN COiNCIDENTOR (SAME AS 4.4. 18.1)

(SAME AS 4.4.18.1)

(SAME AS 4.4.16.1)

BOTH P-8 COINCIDENTOR A I B RELAYS MUJST NC-44NXB 4.4.21.2 NC-44NXA &

UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL IV P-8 (SAME AS 4.4.18.2)

(SAME AS 4.4.18.2)

(SAMEAS 4.4.18.2)

NC-44NXB ACTUATION IN COINCIDENTOR 4.4.22.1 NC-44KXA &

TRIPPED CHANNEL IV DROPPED ROD STOP IN ANNUNCIATION NONE REQUIRED ROD STOP BOTH DROPPED ROD STOP A & B RELAYS MUST NC-44KXB COINCIDENTOR TRIP FOR CHANNEL ACTUATION TO OCCUR 4.4.22.2 NC-44KXA &

UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL IV PERIODIC TEST REDUNDANT CHANNELS CHANNEL IV DROPPED ROD STOP

DISABLED, NC-44XIB DROPPED ROD STOP IN COINCIDENTOR LOGIC BECOMES 1/3 ON REMAINING CHANNELS 4.4.23.1 REG SUPL IV VOLTS ZERO R LOSS OF POWER TO CHANNEL IV N-1208)

CONTROL ROOM INDICATION, (SAME AS 4.4.1.1)

(SAME AS 4.4.1.1)

(SAME AS 4.4. 1. 1)

(NIS)

GROUNDED HIGH AND LOW VOLTAGE SUPPLIES ANNUNCIATION 4.5.01.1 NY 1203 AUX VOLTS HIGH (SAME AS 4.1.3.1)

CONTROL ROOM INDICATION, (SAME AS 4.1.3,1)

(SAME AS 4.1.3.1)

POWER SUPPLY PERIODIC TESTING 4.5.01.2 NY 1203B AUX VOLTS LOW (SAME AS 4.1.3.2)

CONTROL ROOM INDICATION, (AM AS 4.1.3.2)

(SAME AS 4.1.3.2)

(SAE AS 4.1.3.2)

POWER SUPPLY PERIODIC TESTING 4.5.02.1 NY 1203B WIDE INPUT OPEN (SAME ASA.1.7.1 (SAME AS 4.1.1.1)

(SAME AS 4.1.1.2)

(SANE AS RANGE AMP 4.5.02.2 NY 12036 WIDE INPUT SHORT LOW CHANNEL I LOG POWER AND RATE SIGNALS CONROL ROOM INDICATION, REDUNDANT CAeS CHANNEL I HIGH SUR DISABLED, LOGIC HIGH SUR ROD STOP LOGIC BECOMES

/1 ON RANGE AMP TO ANALOG

OUTPUTS, RATE

AMP, N-1201 HIGH PERIODIC TESTING BECOMES III ON REMAINING CHANNEL REMAINING CHANNEL.

VOLTAGE PERMISSIVE, INDICATION.

LOOP CURRENT MAY INCREASE TO LEVEL AMP I 4.5.02.3 NY 1203B WIDE LOG OUTPUT HIGH HIGH CANNEL I LO POWER SIGNAL TO (SAME AS 4.5.2.2)

(SAE AS 4.5.2.2)

(SAME AS 4.5.2.2) REACTOR TRIP MAY OCCUR (SAE AS 4.5.2.2) HIGH SUR ROD STOP MAY RANGE AMP

RECORDER, RATE AMP, N-1201 HIGH VOLTAGE DURING FAILURE TRANSIENT IF P-7 IS ON OCCUR DURING FAILURE TRANSIENT IF P-7 IS PERMISSIVE, INDICATION.

HIGH RATE ON SIGNAL MAY OCCUR DURING FAILURE TRANSIENT 4.5.02.4 NY 1203B WIDE LOG OUTPUT LOW (SAME AS 4.5.2.2)

(SAME AS 4.5.2.2)

RANGE AMP 4.5.02.5 NY 1203B WIDE COUNTS OUTPUT HIGH HIGH CPS SIGNAL TO ANALOG OUTPUTS PERIODIC TEST NONE REQUIRED NONE RANGE AMP 4.5.02.6 NY (203 WIDE COUNTS OUTPUT LOW LOW CPS SIGNAL TO ANALOG OUTPUTS PERIODIC TEST NONE REQUIRED NONE RANGE AMP 4.5.02.7 NY 1203B WIDE TEST (SAME AS 4.5.2.2)

ANNUNCIATION (O-R200-1)

(SAE AS 4.5.2.2)

(SAME AS 4.5.2.2)

(SAME AS 4.5.2.2) TEST/CALIBRATE SWITCH RANGE AMP 4.5.03.1 NI 35A (LOG) INPUT OPEN LOSS OF CHANNEL II INTERMEDIATE RANGE CONTROL ROOM INDICATION, NONE REUIRED NONE DRAWER INDICATION POWER INDICATION PERIODIC TESTING 4.5.03.2 NI 35A (LOG)

INPUT SHORT (SAME AS 4.5.2.2)

(SAME AS 4.5.2.2)

(SAME AS 4.5.2.2) 4.5.04.1 RATE AMP I INPUT OPEN LOW CHANNEL I RATE SIGNAL 1O INDICATION, CONTROL ROOM INDICATION REDUNDANT CHANNELS CHANNEL I HIGH SUR DISABLED, LOGIC HIGH SUR ROD STOP LOGIC BECOMES 1/I ON B/S AMPS FOR HIGH SUR TRIP AND ROD STOP BECOMES 1/1 ON REMAINING CHANNEL REMAINING CHANNEL 4.5.04.2 RATE AMP I INPUT SIORT (SAME AS 4.5.2.2)

(SAME AS 4.5.2.2)

(SAME AS 4.5.2.2) 4.5.04.3 RATE AMP I OUTPUT HIGH HIGH CHANNEL I RATE SIGNA TO CONTROL ROOM INDICATION, NONE REQUIRED HIGH SUR REACTOR TRIP IF P-7 IS ON HIGH SUR ROD STOP IF P-7 IS ON INDICATION, B/S AMPS FOR HIGH SUR TRIP ANNUNCIATION, PERIODIC TESTING AND ROD STOP

-' -4.5.04.4 RATE AMP I

OUTPUT LOW LOW CHANNEL I RATE SI AN TO INDICATION, CONTROL ROOM INDICATION, REDUNDANT CHANNEL CHANEL I HIGH SUR DISABLED, LOGIC CHANNE B/S A FR SR IP NOD RTOI ANE LSAMS OFPOWR HIHRTO I C

ANNE ROV STPPRODCTSIGNEOE-1208)AIIGCANE 1 ECMS11 NRMIIN HNE

Page No.

11 11/23/88 REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS SAN ONOFRE UNIT 1 TABLE 4: NIS SCRAMS AND PERMISSIVES LOCAL EFFECTS AND METHOD OF INHERENT COMPENSATING ITEM I DEVICE ID FAILURE MODE DEPENDENT FAILURES DETECTION PROVISIONS EFFECT ON RPS REMARKS 4.5.06.1 NC-35F BISTABLE TRIPPED CHANNEL I HIGH SUR TRIP SIGNAL TO ANNUNCIATION, PERIODIC TESTING NONE REQUIRED HIGH SUR REACTOR TRIP IF P-7 IS ON COINCIDENTOR 4.5.06.2 NC-35F BISTABLE UNTRIPPED LOSS OF CAPABILITY TO TRIP CHANNEL I PERIODIC TESTING (SAME AS 4.5.4.4)

(SAME AS 4.5.4.4)

HIGH SUR RELAYS IN COINCIDENTOR 4.5.07.1 N 1203 LOW VOLTS HIGH (SAME AS 4.5.2.3)

(SAME AS 4.5.2.3)

VOLTAGE SUPL 4.5.07.2 N 1203 LOW VOLTS ZERO LOSS OF POWER TO CHANNEL I (N-120)HIGH ANNUNCIATION NONE REQUIRED HIGH SUR REACTOR TRIP IF P-7 IS ON HIGH SUR ROD STOP IF P-7 IS ON VOLTAGE SUPL SUR TRIP AND ROD STOP BISTABLES.

4.5.08.1 NC-35FTAI &

TRIPPED CHANNEL I HIGH SUR TRIP SIGNAL IN (SAME AS 4.5.6.1)

(SAME AS 4.5.6.1)

NC-35FTB1 COINCIDENTOR 4.5.08.2 NC-35FTAI A UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL I HIGH PERIODIC TESTING (SAME AS 4.5.4.4)

(SAME AS 4.5.4.4)

NC-35FTB1 SUR TRIP IN COINCIDENTOR 4.5.09.1 NC-35FXA &

TRIPPED CHANNEL I HIGH SUR TRIP IN COINCIDENTOR (SAME AS 4.5.6. 1)

(SAME AS 4.5.6;1)

(SAME AS 4.5.6.1)

BOTH HIGH SUR SCRAM COINCIDENTOA 4..91NC-35FXB OR TRIPE CHCNE5I IGRELAYS MUST TRIP FOR CHANNEL TRIP TO 4.5.09.2 NC-63S5FXA UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL I HIGH (SAME AS 4.5.6.2)

(SAME AS 4.5.6.2)

NC-3HB SUR TRIP IN COINCINCIDENTOR 4.6.01.1 NY 1204B AUX VOLTS HIGH (SAME AS 4.2.3.1)

CONTROL ROOM INDICATION (SANE AS 4.2.3.1)

(SAME AS 4.2.3.1)

POWER SUPPLY PERIODIC TESTING 4.6.01.2 NY 1204B AUX VOLTS IGGH (SAME AS 4.2.3.2)

CONTROL ROOM )

(SAME AS 4.2.3.2)

POWER SUPPLY PERIODIC TESTING 4.6.02.1 NY 1204B WIDE INPUT OPEN (SAME AS 4.3.7.1)

(SAME AS 4.2.1.1)

(SAME AS 4.2.1.2)

RANGE AMP 4.6.02.2 NY 1204B WIDE NPUT SHORT LOW CHANNEL 11 LOG POWER SIGNAL TO CONTROL ROOM INDICATION, REDUNDANT CHANNELS CHANNEL U I HIGH SUR

DISABLED, LOGIC HIGH SUR ROD STOP LOGIC BECOMES 1/NTON RANGE AMP ANALOG

OUTPUTS, RATE AM, N-1202 HIGH PERIODIC TESTING BECOMES I/1 ON REMAINING CHANNEL REMAINING CHANNEL.

VOLTAGE PERMISSIVE, INDICATION.

LOOP CURRENT MAY INCREASE TOLEVEL AMP II 4.6.02.3 NY 1204 WIDE OUTPUT HIGH HIGH CHANNEL II LOS POWER SIGNAL TO (SAME AS 4.6.2.2)

(SAME AS 4.6.2.2)

(SAME AS 4.6.2.2) REACTOR TRIP MAY OCCUR HIGH SUR ROD STOP MAY OCCUR DURING RANGE AMP

RECORDER, RAiE

AMP, N-1202 HIGH VOLTAGE DURING FAILURE TRANSIENT IF P-7 IS ON FAILURE TRANSIENT IF P-7 IS ON PERMISSIVE, INDICATION.

HIGH RATE SIGNAL MAY OCCUR DURING FAILURE TRANSIENT 4.6.02.4 NY 1204B WIDE OTPUT LOW (SAME AS 4.6.2.2)

(SAME AS 4.6.2.2)

RANGE AMP 4.6.02.5 NY 1204B WIDE COUNTS OUTPUT HIGH HIGH CPS SIGNAL TO ANALOG O0PUTS PERIODIC TEST NONEREQUIRED NONE RANGE AMP 4.6.02.6 NY 1204B WIDE COUNTS OUTPUT LOW LOW CPS SIGNAL TO ANALOG OUTPUTS PERIODIC TEST NONE REQUIRED NONE RANGE AMP 4.6.02.7 NY 1204B WIDE TEST (SAME AS 4.6.2.2)

ANNUNCIATION (NA-1200-1 (SAME AS 4.6.2.2)

(SAME AS 4.6.2.2)

(SAME AS 4.6.2.2) TEST/CALIBRATE SWITCH RANGE AMP 4.6.03.1 NI 36A (LOG)

INPUT OPEN LOSS OF CHANNEL 1i INTERMEDIATE RANGE CONTROL ROOM INDICATION, NONE RE9JIRED NONE DRAWER INDICATION POWER INDICATION PERIODIC TESTING 4.6.03.2 NI 36A (LOG)

INPUT SHORT (SANE AG 4.6.2.2)

(SAME AS 4.6.2.2)

(SAMEAS 4.6.2.2)

(SAME AS 4.6.2.2) 4.6.04.' RATE AMP II INPUT OPEN LOW CHANNEL 11 RATE SIGNAL TO CONTROL ROOM INDICATION REDUNDANT CHANNELS CHANNEL 11 HIGH SUR DISABLED, LOGIC HIGH SUR ROD STOP LOGIC BECOMES I/i ON INDICATION, B/S AMPS FOR HIGH SUR TRIP BECOMES i/I ON REMAINING CHANNEL REMAINING CHANNEL AND ROD STOP 4.6.04.2 RATE AMP 1

INPUT SHORT (SAME AS 4.6.2.2)

(SAME AS 4.6.2.2)

(SAME AS 4.6.2.2) 4.&04.3 RATE AMP SI OUTPUT HIGH HIGH CHANNEL II RATE SIGNAL TO CONTROL ROOM INDICATION, NONE REQUIRED HIGH SUR REACTOR TRIP IF P-7 S ON HIGH SUR ROD STOP IF P-7 IS ON INDICATION, B/S AMPS FOR HIGH SUR TRIP ANNUNCIATION, PERIODIC TESTING ANDI RD STOP

Page No.

12 11/23/88 REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS SAN ONOFRE UNIT I TABLE 4:

NIS SCRAMS AND PERMISSIVES LOCAL EFFECTS AND METHOD OF INHERENT COMPENSATING ITEM #

DEVICE ID FAILURE MODE DEPENDENT FAILURES DETECTION PROVISIONS EFFECT ON RPS REMARKS 4.6.04.4 RATE AMP II OUTPUT LOW LOW CHANNEL 11 RATE SIGNAL TO CONTROL ROOM INDICATION, REDUNDANT CHANNEL CHANNEL I! HIGH UR DISABLED, LOGIC CHANNEL 11 HIGH SUR ROD STOP

DISABLED, INDICATION, B/S AMPS FOR HIGH SUR TRIP PERIODIC TESTING BCMS1iO EANN HNE OI EOE l

NRMIIG~A'E AND ROD STOP BCMS11O EANN HNE OI EOE

/

NRMIIGD'IND 4.6.06.1 NC-36F BISTABLE TRIPPED CHANNEL 41 HIGH SUR TRIP SIGNAL TO ANNUNCIATION, PERIODIC TE NR COINCIDENTORNCNN ELRDHGSURECO'RPIFP-ISN 4.6.06.2 NC-36F BISTABLE UNTRIPPED LOSS OF CAPABILITY TO TRIP CHANNEL II PERIODIC TESTING (SAME AS 4.6.4.4)

(SAME AS 4.6.4.4)

HIGH GUR RELAYS IN COINCIDENTOR 4.6.07.1 N 1204 LOW VOLTS HIGH (SAME AS 4.6.2.3)

(SAME AS 4.6.2.3)

(SAME 4.6.2.3)

VOLTAGE SUPL 4.6.07.2 N 1204 LOW VOLTS ZERO LOGS OF POWER TO CHANNEL 1I (N-1204)

ANNUNCIATION NONE REOUIRED HIGH SUR REACTOR TRIP RELAY P-7 IS ON H'IGH SUR ROD STOP IF P-7 IS ON VOLTAGE SUPL HIGH SUR TRIP AND ROD STOP BISTABLES.

4.6.08.1 NC-36FTAI &

TRIPPED CHANNEL I1 HIGH SUR TRIP SIGNAL IN (SAME AS 4.6.6.1)

(SAME AS 4.6.6.1)

NC-36FTB1 COINCIDENTOR 4.6.08.2 NC-36FTAI &

UNTRIPPED LOSS OF CAPABILITY FOR CHANNEL II HIGH PERIODIC TESTING (GAME AS 4.6.4.4)

(SAME AS 4.6.4.4)

NC-36FTBI SR TRIP IN COINCIDENTOR 4.6.09.1 NC-36FxA &

TRIPPED CHANNEL II HIGH SUR TRIP IN COINCIDENTOR (SAME AS 4.6.6.1)

(SAME AS 4,.6.6. 1),

(SAME AS 4.6.6. 1)

.BOTH HIGH SUR SCRAM CO INCIDENTOR A & B NC-36FXB NC-3FXBRELAYS MUST TRIP FOR CHANNEL TRIP TO OCCUR 4.6.09.2 NC-36FXA &

UNTRIPPED LOSS OF CAPAIITY FOR CHANNEL 11 HIGH (SANE AS 4.6.6.2)

(SAME AS 4.6.6.2)

NC-36FXB SUR TRIP IN COINCIDENTOR 4.7.01.1 PT 415 SIGNAL HIGH HIGH FIRST STAGE TURBINE PRESSURE TO CONTROL ROOM INDICATION, PC-415-X (WILL INTERRUPT REDUCED REDUNDANCY AGAINST HIGH SUR TRIP P-7 AND P-DEFEATED UNTIL TURBINE P-7, P-B, INPUT BISTPBLES, ROD CONTROL PERIODIC TESTING CURRENT LOOP UPON TURBINE BYPASS (UN-P7),

ALL SCRAM FUNCTIONS TRIPPED SYSTEM (T-REF7 AND INDICATOR TRIP) FOR UN-P7 DEFEAT REMAIN OPERABLE AS RQUIRED 4.7.01.2 PT 415 INAL LOW LOW FIRST STPUE TURBINE PRESSURE TO P-7, CONTROL ROOM INDICATION, NIS CHANNELS FOR P-7, P-REDUCED REDUNDANCY FOR P-7, P-B DEFEAT, P-INPUT BISTABLEG, ROOCONTROL SYSTEM PERIDIDIC TESTING

DEFEAT, NONE REQUIRED FOR ALL SCRAM FUNCTIONS REMAIN OP

.ERABLE AG (T-REF)AND INDICATOR UN-P7 DEFEAT REUIRED 4.7.02.1 21 415 INPUT OPEN (SAME AS 4.7.1.2)

CONTROL ROOM INDICATION (SAME AS 4.7.1.2)

(SAME AS 4.7.1.2)

IN PT-415 CURRENT LOOP

4. 7.02.2 GI 415 iNPUT SH'ORT LOSS OF FIRST STAGE PRESSURE INDICATION (SAME AS 4.7.1.2)

NONE REQUIRED NONE 4.7.03.1 'PC 415-XI ON (SAME AS 4.7.1.2)

(SAME AS 4.7.1.2)

(SANE AS 4.7.1.2)

ENERGIZED*ON 2/3 LOW TURBINE AUTOSTOP 4.7.03.2 PC 415-XI OFF NO EFFECT. NORMAL POSITION DURING PERIODIC TESTING PT-45 (WILL PROVIDE LOW (SAME AS 4.7.1.1)

TURBINE OPERATION SIGNAL) FOR UN-P7 DEFEAT 4.7.04.1 TC 415 INPUT OPEN (SAME AS 4.7.1.2)

CONTROL ROOM INDICATION (SAME AS 4.7.1.2)

(SAME AS 4.7.1.2)

IN PT-415 CURRENT LOOP. PROVIDES T-REm 4.7.04.2 TC 415 INPUT SHORT SGA ORDCNRLSSE 4.7.0.2NO EFFECT CONTROL ROOM INDICATION NONE REUIRED NONE LOSS OF T-REF INPUT TO ROD CONTROL 4.7.05.1 QC 415A TRIPPED LOW FIRST STAGE TURBINE PRESSURE ANNUNCIATION, PERIODIC TESTING NIS CHANNELS FOR UN-P7 (SAME AS 4.7.1.1)

ON (AS-IS DURING POWER OPERATION)

CONTACTS OFENED FOR AP4A, AP4C (P-7)1' DEFEAT, NONE REQUIRED FOR CLOSED FOR AP4B, AP4D (UN-P7.

P-7 DEFEAT 4.7.05.2 0C 415A UNTRIPPED.

LOW FIRST STAGE TURBINE PRESSURE PERIODIC TESTING NIS CHANNELS FOR P-7 REDUCED REDUNDANCY FOR P-7 DEFEAT, ALL OFF CONTACTS CLOSED FOR AP4A, AP4C (P-7),

DEFEAT, NONE REQUIRED FOR SCRAM FUNCTIONS REMAIN OPERABLE AS OPENED FOR P4B, AP4D (UN-PlY UN-P7 DEFEAT REQUIRED 4.7, 06.1 DC 415A-X TRIPPED (SAME AS 4. 7. 5.1)

.(SAME AS 4.7.5.1)

(SAME AG 4.7.5.1)

(SAME AS 4.7.5.1)

EEGZD(SI UIGPWROEAIN 4.7.06' 2 (IC 415A-X UNTRIPPED (SAME AS 4.7.5.2)

(SAME AS 4.7.5.2)

DENERGIZED (SI UIGPWROEAIN 4.7.07.1 DC 415C/D INPUT OPEN (SAE AS 4.7.172)

CONTROL ROOM INDICATION (SAME AS 4.7.1.2)

(SAME AS 4.7.1.2)

IN PT-415 CURRENT LOOP 4.7.07.2 GC 415C/D INPUT SHORT NO EFFECT PERIODIC TESTING NONE REOUIRED NONE

4. 7. 0&1 OC 415C TRIPPED LOW FIRST STAGE PRESSURE CONTACTS OPENED ANNUNCIATION, PERIODIC TESTING NONE REQUIRED P-B DEFEATED, 1/3 LOW RCS FLOW TRIP ON (AS-IS DURING-FULL POWER OPERATION)

FOR APFOA, APIOC (P-RI REMAINS OPERABLE (CANNOT BE BYPASSED),

ALL OTHER SCRAM FUNCTIO REMAIN OPERABLE AS REQUIRED

Page No.

13 11/23/88 REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS SAN ONOFRE UNIT 1 TABLE 4: NIS SCRAMS AND PERMISSIVES LOCAL EFFECTS AND METHOD OF INHERENT COMPENSATING ITEM I DEVICE ID FAILURE MODE DEPENDENT FAILURES DETECTION PROVISIONS EFFECT ON RPS REMARKS 4.7.08.2 9C 415E UNTRIPPED LOW FIRST STAGE PRESSURE CONTACTS CLOSED PERIODIC TESTING NIS CHANNELS FOR P-R FOR APIDA, APIOC (p-8)

RDCDRDNAC O -

EET L F

DEFEAT SCRAM FUNCTIONS REMAIN OPERABLE AS 4.7.03,1 QC 415E-X TRIPPED (AEA

.,,jRQIE 4.7.09.i DC 415E-X TRIPPED

~~~~~(SAME AS 4.7.8.1)

(SAEA

)SAME AS 4.7.8.1)

(SAE AS 4.7.8.1)

EEGZD(SI UIGPWROEAIN 4.7.09.2 9C 415E-X UNTRIPPED (SAME AS 4.7.8.2)

(SAME AS 4.7.B.2)

(SAME AS 4.7..2)

(SAME AS 4.7.8.2)

ENERGIZED 4.7.10.1 YE 415 VOLTS HIGH (AEA...

)cD-NRIE 4.7.10.2 YE 415 VO T I H(

A E A...1(SAME AS 4.7.1,i)

(SANE AS 4.7.1.1)

(SAME AS 4.7.1.1)

(SAME AS 4.7.1.1 1 4.7.10.2 YE 415 VOLTS ZERO (SAME AS 4.7.1.2)

(SAME AS 4.7.1.21 (SAME AS 4.7.1.21 (SAME AS 4.7.12' 4.7.11.1 AP4A ON ONE OF TWO SETS OF CONTACTS ACTUATED FOR ANNUNCIATION REDUNDANT RELAY (AP4C REDUCED REDUNDANCY FOR P-7 DEFEAT, ALL P-7 BYPASS OF NON-Nis SCRAMS SCRAM FUNCTIONS REMAIN OPERABLE AS 4.7.11.2 AP4A DFFLOSO PABITRQRE 4.7.12 PA F LSSO CPBIIY FOR P-7 BYPASS OF PERIODIC TESTING NONE REQUIRED P-7 DEFEATED, NON-NIS SCRAMS CANNOT BE UN-P7 (HIGH SUR SCRAM PERMISSIVE AND 4.7.12.1NON-NIS SCRAMS BYPASSED ECEPT 13 LOW RS FLOW (P-)

P-NAFFECTED 4.7.12.1 AP4B ONFNFFTOST O OTCSATAEDFRANNITO ONEP BYPAWOSS OF HIGH S SCA E O NNNITO REDUNDANT RELAY (AP4D)

REDUCTED REDUNDANCY FOR UN-P7 DEFEAT, UN-P BYPSS.OF IGH UR SRAMALL SCRAM FUNCTIONS REMAIN OPERABLE AS 4.7.12.2 AP4B OFF LOSS OF CAPABILITY FORUN-P7 BYPASS OF PERIODIC TESTING NONE REQUIRED HIGH SUR CHANNELS REMAIN OPERABLE DURING HIGHSUR CRAMPOWER OPERATION, ALL OTHER TRIP 4.7.13.FUNCTIONS REMAIN OPERABLE AS REQUIRED 4.7.1.1 A ON(SAME AS 4.7.11.1)

(SAME AS 4.7.1.1 REDUNDANT RELAY AP4A (SAME AS 4.7.11.1) 4.7.13.2 AP4C OFF (SAME AS 4.7.11.21 (SAME AS 4.7.11.21 (SAME AS 4.7.11.2)

(SAME AS 4.7.11.2) 4.7.14.1 AP4O ON (SAME AS 4.7.12.1)

(SAME AS 4.7.12.1)

REDUNDANT RELAY (AP4B (SAME AS 4.7.12.1) 4.7.14.2 AP4D OFF (SAE AS 4.7.12.2)

(SAME AS 4.7.12.2)

(SAM AS 4.7.12.2)

(SAME AS 4.7.12.2) 4 7. 15.1 APiOA ONONE OF TWO SETS OF CONTACTS ACTUATED FOR ANNUNCIATION REDUNDANT RELAY (APIOC) REDUCED REDUNDANCYFOR P-B DEFEAT, ALL P-B BY PASS OF N7N-NI SCRAMS SCRAM FUNCTIONS REMAIN OPERABLE AS 4.7.15.2 APIO-A OFF LOSS OF CAPABILITY FOR P-B PASS OF PERIODIC TESTE REQUIRED 4.7N-NIB SCR OSAE A MS15)

BY PASSED EXCEPT BY P-7 4. 7 1 5.

A P O CO N

S A M A 4..1 5 1 1(S A M E S 4.7. z5

)

R E D U N D A N T R E L A Y (A P I DA

)

(S A N E A S 4.7. 1 5.1 1 4.7.16.2 APIOC OFF (SAME AS 4.7.15.2)

(SAME AS 4.7.15.21 (SAME AS 4.7.15.2)

(SAME AS 4.7.15.2) 4.7.

17.1 N

1215 INPUTS OPEN LOSS OiF CHPINNEL DEVIATION ALARM PERIODIC TESTING NONE REQUIRED' NONE (COMPARATOR).CAPABILITY NO EFFCT ON NI CHNNL 4.7.17.2 N 1215 IINPUTS SHORTED (SAME-AS 4.7.17.1)

PERIODIC TESTING (SAME AS 4.7.17.1)

(SAME AS 4.7.17.1)

CHANNEL FAILURE PRECLUDED BYAAOP (COMPARATOR)

O ANLAOG 4.7.17.3 N 1215 INPUT GROUNDED (SAME AS 4.7.17.1)

(SAME AS 4.7.17.1)

(SAME AS 4.717.1)

(SAME ASO.7.7.1 (COMPARATOR)

(ONE AMPLIFIER) 4.7.18.1 NLR 1200-1 INPUT OPEN LOSS OF CHANNEL RECORDING CAPABILITY FOR CONTROL ROOM INDICATION NONE REUIRED NONE ONE CHANNEL, NO EFFECT ON NIB CHANNELS 4.7.18.2 LR 1200-I INPUT SHORTED (SAME AS.4.7.1.I1 (SAME AS 4.7.1811 (SAE AS 4.7.18.1)

(SAME AS 4.7.18.1)

ANALOG OUTPUT ISOLATORS PREVENT SHORT 4.7,18.3 NLR 1200-1 INPUT GROUNDED (AEA.. 81 F HNE

4..1.3 N R 20 -

I PU RO ND D S ME AS 4 7. 8. )(SA E AS 4.7.18. i)

(SAM E AS 4.7.18.1 )

(SAM E AS 4.7.18.1)

(SAM E AS 4.7.18.2 )

4.7.19.1 NLR 1201 INPUTS OPEN LOSS OF OVERPOWER RECORDING CAPABILITY, (SAME AS 4.7.18.11 (SAME AS 4.7.1.1)

(SAME AS 4.7.18.11 NO EFFECT ON NIB CHANNELS 4.7.19.2 NLR 1201 INPUTS SHORTED (SAME AS 4.7.18.1)

(SAME AS 4.7.18.1)

(SAME AS 4.7.18.1i (SAME AS 4.7.18.1)

(SAME AS 4.7.18.2) 4.7.19.3 NLR 1201 INPUTS GROUNDED (SAE AS 4.7.16.1)

(SAME AS 4.7.1.1)

(SAME AS 4.7.18.1)

(SAE AS 4.7.18.2) 4.7.20.1 NCS 1200-1 INPUTS OPEN BISTABLE OUTPUT TO ONE CHANNEL OF ANNUNCIATION NONE REQUIRED AFFECTED CHANNEL TRIPPED, OVERPOWER ONE CHANNEL PER ITCH DECK (MODE SWITCH) (ONE DECK)

OVERPOWER COINCIDENTOR INTERRUPTED, LOGIC BECOMES 1/3 ON REMAINING CHANNELS DE-ENRGIZING CHANNEL COINCIDENTOR RELAYS

Page No.

14 11/23/88 REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS SAN ONOFRE UNIT I TABLE 4:

NIS SCRAMS AND PERMISSIVES ITEM DEVICE ID FAILURE MODE LOCAL EFFECTS AND METHD OF INHERENT COMPENSATING ITM DVCEID FALRENOEDEPENDENT FAILURES DETECTION PROVISIONS EFFECT ON RPS REMARKS 4.7.20.2 NCS 1200-1 INPUTS SHORTED BISTABLE OUTPUTS TO ONE CHANNEL OF PERIODIC TESTING REDUNDANT CHANNELS AFFECTED CHANNEL SETPOINT BECOMES (MODE SWITCH) (ONE DECK)

OVERPOWER COINCIDENTOR PARALLELED I-RANGE VALUE. LOGIC UNCHANGED IN HI-RANGE, BECOMES 213 ON REMAINING CHANNELS IN LOW OR MID-RANGE 4.7.20.3 NCS 12(;-I INPUTS GROUNDED (SAME AS 4.7.20.)

(SAKE AG 4.7.20.1)

(SAME AS 4.7.20.1)

(NODE SWITCH)

(ONE DECK) 4.7.20.4 NCS 1200-1 RANGE HIGH OVERPOWER RIP SETPOINT SELECTED FOR ANNUNCIATION NONE OVERPOWER TRIP ETPONT ON ALL FOUR PRECLUDED BY STRICT ADMINISTRATIVE (OE SWITCH)

WRONG RANE ON ALL FOUR CHANNELS (WORST CHANNELS TOO HIGH TO PREVENT NS FOR CONTROL CASE HIGH RANGE WHEN BELOW LOW RANGE REACTIVITY ADDITION EVENTS FROM LOW SELECT VALUE)

POWER 4.7.21.1 REG SUPL IV VOLTS ZERO OR (SAME AS 4.7.1.2)

(SAME AS 4.7.1.2)

(AE AS 4.7.1.2)

(SAME AS 4.7.12)

STEAM DUP (TEMPERATURE CONTROL MODE (R5)

GROUNDED ONLY) AND ROD INSERTION M4AY OCCUR D0 MISMATCH BETWEEN 7-AVG AND INDICATED T-REF (PT-415) AND DECREASE IN INDICATED 4.7.22.1 NON-REG SUPL IV YOLTS ZERO DR ME(T47 7C-415A-X, QC-415E-X DE-ENERGIZED,.

ANNUNCIATON IS CHANNELS FOR P-7, P-8 REDUCED REDUNDANCY FOR P-7, P-8 DEFEAT.

STEAM DUMP (TEMPERATURE CONTROL MODE)

(R5)

GROUNDED CLOSING CONTACTS IN AP4, AP4C (P-7),

DEFEAT, NONE REQUIRED FOR HIGH SUR SCRAM REMAINS OPERABLE (UN-P7 AND AUTO ROD CONTROL DISABLED AND A910A, AP10C (P-8)

CIRCUITS AND OPNIN AP B

, P4 (P- ) CIRCUITS L

N-P7 DEFEAT DEFEATED, SCRAM CANNOT BE BYPASSED), ALL OPENINGOTHER SCRAM FUNCTIONS REMAIN OPERABLE AS 4.7.23. 1 72-141 (BREAKER) TRIPPED LOSS OF POWER TO AP4A, AN4, AP4C, A4D, ANNUNCIATION NONE REQUIRED P-,

P-8 DEFEATED, UN-P7 CANNOT BE 125 VC SUPLY TO PERMISSIVE RELAYS APIDA, APOC DEFEATED. ALL SCRAM FUNCTIONS REMAIN 4.7.24.1 PROPRT-A TRIPPED COINCIDENTUR A SHUNT TRIP SIGNAL TO ANNUNCIATION NONE REQUIRED OVERPOWER REACTOR TRIP IF ABOVE P-7 POWER RANGES OVERPOWER REACTOR TRIP SCRAM BREAKER-A AND UNDERVDLTAGE SIGNAL (PROPRT) A LOGIC IS 2/4 ON RELAYS TO BOTH SCRAM BREAKERS C-4PJRXAI THROUGH NC-44PJRIAl

-4.7.24.2 PR6PRTPA UNTRIPPED LOSS OF CAPABILIY FOR COINCIDENTOR A PERIODIC TEST REDUJNDANT COINCIDENTOR COINCIDENTOR A OVERPOWER TRIP DISABLED. COINCIDENTOR B PROVIDES SHUNT TRIP OVERPOWER TRIP TO SCRAM BREAKERS AND SCRAM BREER OVERPOWER TRIP LOGIC BECOMES 1/ ON SIGNAL TO SCRAM BRKER-B AND UNDERVOLTAGE REMAINING COINCVOENTOR SIGNAL TO BOTH SCRAM BEAKERS 4.7.25.1 PROPRT-B TRIPPED COINCIDENTOR B SHUNT TRIP SIGNAL TO (SAME AS 4.7.24.1)

(SAME AS 4.7.24.1)

SAE AS 4.7.24.1)

POWER RANGE OVERPOWER REACTOR TRIP SCRAM BREAKER-B AND UNDERVOLTAGE SIGNAL (PROPRT)

B LOGIC iS 2/4 ON RELAYS TO BOTH SCRAM BREAKERS NC-41PRI THROUGH NC-44PJRXBi 4.7.25.2 PROPRT-B UNTIPPED LOSS OF CAPABILITY FOR COINCIDENTOR B

(SAME AS 4.7.24.2)

COINCIDENTOR B OVERPOWER TRIP DISABLED.

COINCIDENTOR A PROVIDES SHUNT TRIP OVERPOWER TRIP TO SCRAM BREAKERS LOGIC BECOMES 1/1 ON REMAINING SIGNAL TO SCRAM BREAKER A AND COINCIDENTOR UNDERVLTAGE SIGNAL TO BOTH SCRAM 4.7.26.1 PRP7A TRIPPED COINCIDENTOR A P-7 SIGNAL TO AP4A AND C, ANNUNCIATION REDUNDANT COINCIDENTOR REDUCED REDUNDANCY FOR P-7 DELEAT OF POWER RANGE P-7 (PRP7)

A LOGIC 1S62/4 ON LOSS OF COINCIDENTOR A UN-P7 DEFEAT NON-NIS SCRAMS.

HIGH SUR SCRAM CHANNELS RELAYS NC-41MXA THROUGH NC-44MXA, WITH SIGNAL TO AP4 B AND D

REMAIN OPERABLE DURING POWER OPERATION OUTPUT LOGIC 2/2 ON PRP7A AND PRP7-B 4.7.26.2 PRP7-A UNTRIPPED, COINCIDENTOR A UN-P7 DEFEAT SIGNAL TO PERIODIC TEST REDUNDANT COINCIDENTOR REDUCED REDUNDANCY FOR UN-P7 DEFEAT OF UN-P7 (HIGH SUR SCRAM PERMISSIVE) DEFEAT AP4B AND D, LOSS OF CAPABILITY FOR HIGH SUR SCRAM P-7 DEFEATED, NON-NIS LOGIC IS 2/2 ON PRP7-A AND PRP7-B COINCIDENTOR A P-7 SIGNAL TO P4A AND C SCRAMS CANNOT BE BY PASSED EXCEPT BY P-B 4.7.27.1 PRP7-B TRIPPED COINCIDENTOR B P-7 SIGNAL TO AP4A AND C, (SAME AS 4.7.26.1)

(SAME AS 4.7.26.1)

(SAE AS 4.7.26.1)

POWER RANGE P-7 (PRP7(

B LOGIC 15 2/4 ON UN-P7 DEFEAT SIGNAL TO AP4B AND D

RELAYS NC-41MXB THROUGH NC-44MXB, WITH OUJTPUT LOGIC 2/2 ON PRP7-A AND PRP7-B 4.7.27.2 PRP7-8 UNTRIPPED COINCIDENTOR B UN-P7 DEFEAT SIGNAL TO (SAME AS 4.7,26.2)

(SAME AS 4.7.262)

(SAME AS 4.7.26.2)

AP4B AND D, LOSS OF CAPAPBILITY FOR COINCiDENTOR A P-7 SIGNAL TI AEA AND N

Page No.

15 11/23/88 REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS SAN ONOFRE UNIT I TABLE 4:

NIS SCRAMS AND PERMISSIVES LOCAL EFFECTS AND METHOD OF INHERENT COMPENSATING ITEM R DEVICE ID FAILURE MODE DEPENDENT FAILURES DETECTION PROVISIONS EFFECT ON RPS REMARKS 4.7.28.i PRP8-A TRIPPED COINCIDENTOR A P-8 SIGNAL TO AP10A AND B ANNUNCIATION REDUNDANT COINCIDENTOR REDUCED REDUNDUNCY FOR P8 DEFEAT OF POWER RANGE P-8 (PRPB)

A LOGIC IS 2/4 ON NON-NIS SCRAM RELAYS NC-41NXA THROUGH NC-44XA WITH OUTPUT LOGIC 2/2 ON PRP8-A AND PRP8-B 4.7.28.2 PRP8-A UNTRIPPED LOSS OF CAPABILITY FOR COINCIDENTOR A PB PERIODIC TEST NONE REQUIRED P-8 DEFEATED ALL SCRAM FUNCTIONS REMAIN SIGNAL TO APIO AND C

OPERABLE 4.7.29.1 PRP8-B TRIPPED COINCIDENTOR B P-8 SIGNAL TO APIO-A AND (SAME AS 4.7.28.1)

(SA4E AS 4.7.28.1)

(SAME AS 4.7.28.1)

POWER RANGE.P-8 (PRP8)

B LOGIC IS 2/4 ON C

RELAYS NC-41NXB THROUGH NC-44NXB, WITH OUTPUT LOGIC 2/2 ON PRP8-A AND PRP8-B 4.7.29.2 PRPB-B UNTRIPPED LOSS OF CAPABILITY FOR COINCIDENTDR B P8 (SAME.AS 4.7.28.2)

(SANE AS 4.7.28.2)

(SAME AS 4.7.28.2)

SIGNAL TO APIA AND C

4.7.30.1 PRDRRS-A TRIPPED COINCIDENTOR A DROPPED ROD STOP SIGNAL ANNUNCIATION NONE REQUIRED DROPPED ROD STOP POWER RANGE DROPPED RELAY ROD 5

(PRORB)

A LOGIC IS 1/4 ON RELAYS NC-41AXA THROUGH NC-44 KXA, WITH OUTPUT LOGIC 1/2 ON PRDRRS-A AND PRDRRS-B 4.7.30.2 PRDRRS-A UNTRIPPED LOSS OF COINCIDENTOR A DROPPED ROD STOP PERIODIC TEST REDUNDANT CGINCIDENTOR COINCIDENTUR A DROPPED ROD STOP SIGNAL DISABLED. LOGIC BECOMES 1/1 ON REMAINING CGINCIDENTOR 4.7. 31.1 PRDRRS-B TRIPPED CDINCIDENTOR 8 DROPPED ROD STOP SIGNAL (SAME AS 4.7.30.1)

(SAME AS 4.7.30.1)

(SAE AS 4.7.30.1)

POWER RANGE DROPPED ROD/ROD STOP (PRDRRS)

B LOGIC IS 1/4 ON RELAYS NC-41KjB THROUGH NC-44KIB WITH OUTPUT LOGIC 1/2 ON PRDRRS-A AND PRDRRS-B 4.7.31.E PRDRRS-B UNTRIPPED LOSS OF COINCIDENTOR B DROPPED ROD STOP (SAME AS 4. 7.30. 2)

(SAE AS 4.7.30.2)

COINCIDENTDR 5 DROPPED RD STOP SI G;A DISABLED.

LOGIC BECOMES 1/1 IN RENAINING CDINCIDENTDR 4.7. 32.1 HSRRT-A TRIPPED COINCIDENTOR A SHUNT TRIP SIGNAL TO ANNUNCIATION NONE REQUIRED HIGH SUR REACTOR TRIP IF BELOW P-7 HIGH STARTUP RATE REACTOR TRIP.(HSRRT) A SCRAM BREAKER A AND UNDERVOLTAGE SIGNAL LOGIC IS 1/2 ON RELAYS NC-35FXA AND TO OTH SCRAM BREAKERS NC-36FXA 4.7.32.2 HSRRT-A UNTRIPPED LOSS OF CAPABILITY FOR CGINCIDENTOR A PERIODIC TEST REDUNDANT CGINCIDENTOR COINCIDENTOR A HIGH SUR TRIP DISABLED.

CGINCIDENTOR B PROVIDES SHUNT TRIP HIGH SUR TRIP TO SCAM BREAKERS AND SCRAM BREAKER LOGIC BECOMES 1/1 ON REMAINING SIGNAL TO SCRAM BREAKER-B AND COINCIDENTOR UNDERVOLTAGE SIGNAL TO BOTH SCRAM BREAKERS 4.7.33.1 HSRRT-B TRIPPED COINCIDENTOR B SHUNT TRIP SIGNAL TO (SANE AS 4.7.32.1)

(SAYE AS 4.7.32.1)

(SAE AS 4.7.32. 1)

HIGH STARTUP RATE REACTOR TRIP

) B SCRAM BREAKER B AND UNDERVOLTAGE SIGNAL LOGIC IS 1/2 ON RELAYS NC-35FIB W

TO BOTH SCRAM BREAKERS NC-36FIB 4.7.33.2 HSRRT-B UNTRIPPED LOSS OF CAPABILITY FOR COINCIDENTOR B

(SAME AS 4.7.32.2)

(SME AS 4.7.32.2)

(SAME AS 4.7.32.2)

CGINCIDENTOR A PROVIDES SHUNT TRIP HIGH SUR TRIP TO SCRAM BREAKERS SIGNAL TO SCRAM BREAKER A AND UNDERVOLTAGE SIGNAL TO BOTH SCRAM BREAKERS 4.7.34.1 TEST BYP-A ON COINCIDENTOR A REACTOR TRIP P-7, UN-P7 ANNUNCIATION REDUNDANT COINCIDENTOR COINCIDENTUR AOVERPOWER AND HIGH SUR AND P-8 OUTPUTS BYPASSED. ROD STOPS AND AND SCRAM. BREAKER TRIPS DISABLED, P-7, UN-P7 AND P-8 ANNUNCIATERS UNAFFECTED DEFEAT REDUNDANCY REDUCED. LOGIC BECOMES 1/1 ON REMAINING COINCIDENTOR 4.7.34.2 TEST BY P-A OFF COINCIDENTOR A REACTOR TRIP P-7, UN-P7 PERIODIC TEST NONE REQUIRED NONE REACTOR TRIP WILL OCCUR WITH AND P-8 OUTPUTS CANNOT BE BYPASSED FOR COINCIDENTOR TRIP RELAYS FOR OVERPOWE TESTING (ABOVE P-7) OR HIGH SUR (BELOW P-7) ARE TESTED 4.7.35.1 TEST BY P-B ON COINCIDENTOR B REACTOR TRIP, P-7, UN-P-7 (SAME AS 4.7.34.1)

(SAME AS 4.7.34.1)

COINCIDENTOR B OVERPOWER AND HIGH SUR AND P-8 OUTPUTS BYPASSED ROD STOPS AND TRIPS DISABLED, P-7, UN-P7 AND P-8 ANNUNCIATERS UNAFFECTED DEFEAT REDUNDANCY REDUCED.

LOGIC BECOMES 1/1 ON REMAINING COINCIDENTOR

Page No.

16 11/23/88 REACTOR PROTECTION SYSTEM SINGLE FAILURE ANALYSIS SAN ONDFRE UNIT I TABLE 4:

NIS SCRAMS AND PERMISSIVES LOCAL EFFECTS AND MIETHOD OF INHERENT COMPENSATING ITEM #

DEVICE 10 FAILURE MODE DEPENDENT FAILURES DETECTION PROVISIONS EFFECT ON RPS REMARKS 4.7.35.2 TEST BY P-B OFF COINCIDENTOR B REACTOR TRIP, P-7, UN-P7.

(SAME AS 4.7.34.2)

(SAE AS 4.7.34.2)

(SAME AS 4.7.34.2)

AND.P-S OUTPUTS CANNOT BE BY PASSED FOR TESTING 4.7.36.1 72-134 (BREAKER)

TRIPPED LISS OF POWER TO COINCIDENTOR A AND B

ANNUNCIATION NONE REQUIRED OVERPOWER (ABOVE P-7) OR HIGH SUR (BELOW P-7) REACTOR TRIP

ML13330B434

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