ML20204J669

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Rev 5 to Emergency Operating Procedure ES-1.3, Transfer to RHR Recirculation
ML20204J669
Person / Time
Site: Millstone, Haddam Neck, 05000000
Issue date: 06/03/1988
From:
CONNECTICUT YANKEE ATOMIC POWER CO.
To:
Shared Package
ML20204H467 List: ... further results
References
ES-1.3, NUDOCS 8810250211
Download: ML20204J669 (8)
v • d • e


Text

JUN 0 31988 4

t NUMBER TTn.E REY. ISSUE /DATE ES.I.3 TRANSFER TO RHR RECIRCULATION Rev. 5

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i A.

PURPOSE i

i d

This procedure provides the necessary instructions for transferring the safety injection system to the recirculation mode.

B.

SYMPTOMS OR ENTRY CONDITIONS

{

This procedure is entered from:

j 1.

E 1, LOSS OF REACTOR OR SECONDARY COOLANT, Step 14, I

on low RWST level.

2.

ECA 2,1, UNCONIROLLED DEPRESSURIZATION OF ALL STEAM on low RWST level.p 8, GENERATORS Ste 3.

All other rocedures whenever RWST level reaches t! e switchover serpoint of 130,000 allons, i

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?$kC2ffQK O 2 882007 3

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JUN 0 31988 NUMBER TTTLE REY. ISSUE /DATE ES.I.3 TRANSFER TO RilR RECIRCULATION Rev. 5 i

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAL.9 CAUTION:

o STEPS ONE THROUGH THREE SHOUw BE PERFORSfED WITHOUT DELAY.

o SI RECIRCULATION FLOW TO THE RCS AfUST BE SfAlhTAINED AT ALL TISIES.

i o

IF OFF SITE POWER IS LOST AFTER Si RESET, AfANUAL ACTION SfAY BE REQUIRED TO RESTART SAFEGUARDS l

EQUIPSfEhT.

i o

IF COhTROL SWITCH FOR ANY SHUTDOWN CHARGING l

PUhfP WAS TAKEN TO THE TRIP POSITION, THE PUSfP(S)

AfAY AUTO START WHEN BOTH SI WL RELAYS ARE RESET.

o IF CORE COOUNG IS DEGRADING AND RADIATION LEVELS PERAllT, DISPATCH AN OPERATOR TO RESf0VE THE BLOCK FROSi RH FCV 796 AND RESTORE ITS AIR SUPPLY, THEN OPERATE VALVE AS REQUIRED.

o CAREFULLY Af0NITOR PAB RADIATION LEVELS AFTER PLACING THE RHR SYSTESt ON RECIRCULATION.

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o RHR RECIRCULATION SHIFTOVER SHOUD BE COAfPLETED BEFORE RWST LEVEL DROPS TO 43.000 GALLONS TO PREVEhT DAbfAGE TO ECCS PUSfPS.

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NOTE:

o FODOUT PAGE SHOUm BE OPEN.

o COhTAINAfEh7 PRESSURE SHOULD BE Af0NITORED. IF i

PRESSURE APPROACHES 40 PSIG, OPEN FIRE STAIN TO COhTAINhfEhT SPRAY. RH Af0V 31, TO REDUCE PRESSURE, WHEN PRESSURE DECREASES TO 3S PSIG, CLOSE RH Af0V 31.

I RESETSI ANDCONTAINMENT ISOLNDON:

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a. Check containment pressure -
a. Perform the following:

LESS THAN 5 PSIG i

1. Open CKTs A13 and B13 in DC panels A and B.
2. Reset SI WL Relays.

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JUN 0 31988 :

NUMBER TTIU REY. ISSUE /DATE ES.I.3 TRANSFER TO RHR RECIRCULATION Rev,5 l

STEP ACTION /EXPECfED RESPONSE RESPONSE NOT OBTAINED l

1

3. E charging pump control i

switch (es) are SQIin TPO,

{

IIEE restore low discharge j

pressure auto stan for shutdown chx ging pump (s) by taking pu control switch (es) to the "Tnp,mp position then releasing switch (es) to the "Auto" position.

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4 QQIQ Step 2.

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b. Remt Si and containment isolat'on (SEE OPPOSITE PAGE) i 2

OPEN SW MOV 5 AND SW MOV 6 LOCALLY OPEN SW MOV 5 AND l

(SW TO RHR HX). ENSURE ONE SW SW MOV 6.

PUMP RUNNINO FOR EACH RHR HX 3

ALION RHR SYSTEM FOR RECIRCULATION:

a. Ch ck containment waterlevel-I GREATER THAN 2.25 FEET l
b. Open containment sump suction
b. Locally open containment sump valve, RH MOV 22 suction valve, RH V 808A.

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E RH V 808A EQIopened.

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'nIEN locally open RH MOV 22 to i

estabush a flow path from the sump to se RCS.

f i

E flow path EQIestablished, i

i THEN QQ IQ ECA 1,1, LOSS OF EMERGENCY COOLANT RECIRCULATION, Step 1.

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c. Check core deluge valves, SI MOV 871 A
c. Open SI MOV 871A and and SI MOV 871B - OPEN SI MOV-871B.
d. Close SI MOV 861B and any one
d. E SI MOV 861B EQIclosed, other loop Siisolation MOV ItiEN close any two loop SI l

isolation MOVs.

e. Stop both LPSI pumps and place f

i control switches in'IPO l

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JUN 0 31988 NUMBER TTT12 REY. ISSUEMATE j

ES.I.3 TRANSFER TO RiiR RECIRCULATION Rev. 5 i

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STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED I

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7 CAUTION:

o DO NOT START LPSI PUStPS %'ITH RH Af0V 874 OPEN.

LPSI PUAfP DISCHARGE PRESSURE %'1LL OVER PRESSURIZE l

THE HPSI BOOSTER PUSfP.

o DO NOT START (JSI PUSfPS %' HEN ON CONTAINAfENT SUhfP RECIRCULATION. LPSI PUh!P DISCHARGE PRESSURE H'lLL SEAT RHR PUSIP DISCHARGE CHECK VALVES AND SUStP RECIRCULATION %'lLL BE LOST.

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f. Stan one RHR pump
f. IE pump does NOI stan.

DIEN start the other RHR pump.

IE NO RHR pump available, ElEN QD IC he '.a. a.:.

LOSS OF E'rMhNCY COOLANT RECIRCl(A flON, Step 1.

g. Check one charging pump RUNNLNG
g. Perfomt the following to stan a (Stop one pump if two running) charging pump:
1. Isolate sealinjection i
2. Check closed CH htOV 257.

3 IE NQIclosed, THEN manually QB locally close l CH htOV 257.

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3. Check open BA htOV 373.

I IE NOIopen, i

THEN manually op.en I

B A htOV 373 08 BA stOV 32. I

4. Take charging pump control switch l to the "Trip" then to the "Stan" position.

l IE NQ charging pump available, HiEN GO IQ ES 1.4, TRANSFER TO TWO PADI i

RECIRCULATION, Step 3.

h. Check RCS pressure -
h. GQ IQ Step 3 j.

LESS THAN 1500 PSIO AstPS.

i. GQIQ ES 1,4, l
i. Check RHR pumh 140 AhtPS I

GREAniR THA 1RANSFER TO TWO PAT 11

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RECIRCULATION, Step 1.

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JUN 0 31988 NUMBER TTTU REY.15$UESATE i

ES.I.3 TRANSFER TO RHR RE IRCULATION Rev.$

4 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTALNED 3

j. Check CH MOV 292B and J. Open CH MOY 292B and CH MOV 292C OPEN CH MOV ?92C.
k. Fully open CH FCV 110 and CH FCV.110A i

(Place control select switch in neutral, then manually open both valves)

}

l. Perform the following to isolate the charging suction header:

1 1 Stop all RCPs

2. Cose all four seal water returo MOVt.

3 Close CH TV 334 i

(Seal wster terum trip valve)

4. Stop metering pump I
5. Cose CH AOV 278(Metering i

pump suction division valve)

6. Icontainment pressure is prester than 5 PSIO,

.liF.S perform the following:

a. Close CH W 240, j

CH TV 241 i

(Seal water return trip valves) i

b. Cose CC TV 1411 i

(CCW return from RCP oil j

celers) l

m. Onen RH MOV 33A and Ril MOV 33B l
  • n. Check RHR pump discharge pressure -
n. Stop RHR pump, GREATER THAN 80 PSIG *1 T11EN GD TD ECA 1.1, LOSS OF EMERGENCY COOLANT REC 7J.CULATION, Step 1.

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o. Check CH MOV 257 CLOSEO
o. Close CH MOV 257.

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p. Check BA MOV 32 CLOSED p.Ckse BA MOV 32.

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q. Cose BA MOV 373 I,

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Page 5 of 8 l

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JUN 0 31988 NUMBER TTTLE REV ISSUE /DATE i

ES 1,3 TRANSFER TO RHR RECIRCULATION Rev.5 l

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STEP ACTION /EXECIED RESPONSE RESPONSE NOT 03TAINED l

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r. Check RHR and charging pumps -
r. E RHR ump cavitating, NOT CAVITATING THEN rform the following:
  • a. Stop operating charging pump.
b. Stop operating RHR pump.
c. Open BA hiOV-373.
d. Close RH hiOV-33A and RH hiOV 330.
e. Start a charging sump.
f. QQIQ ECA 1.L.

LOSS OF EhiERGENCY COOLANT RECIRCULATION, Step 1. *1 E charging pung cavitating THEN perfomi tne following:

a. Equally throttle both core deluge isolatioa hiOVs until operating RHR pump AhiPs are less than 220 AhiPs.
s. Stop both HPSI pumps 4

VFRIFY RHR AND CHARGING FLOW BY hiONITORING REACTOR VESSEL FLUID LEVEL,TEhiPERATURE AND SUBCOOLING TO ENSURE ADEQUATE CORE COOLING Page 6 of 8

JUN 0 31988 4

NUMBER TTIII REY. ISSUE /DATE ES.I.3 TRANSFER TO RHR RECIRCULATION Rev. 5 l

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5TEP ACTION /EXPECIED RESPONSE RESPONSE NOT OBTAINED 5

OPEN AND LOCK OPEN BREAKERS FOR:

BA MOV-373, BA MOV-32, j

SI MOV 861 A, SI MOV-861B l

SI MOV 861C, SI MOV 861D SI MOV 871 A, SI MOV 871B i

LD MOV 200, CH MOV 257 l

RH MOV 22 I

6 MONITOR CORE EXIT E APPROACHING 700' F, THERMOCOUPLES -

THEN PERFORM THE FOLLiW/ING: !

LESS THAN 700* F o Stan additional charging pump.

.QR o Stan additional HPSI pump.

7 MONITOR CHARGING AND IE RHR PUMP CAVITATING, l

RHR PUMPS NOT CAVITATINO THEN PERFORM THE FOLLOWING: I

  • a. Stop operating charging pump.
b. Stop operating RHR pump.

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c. Open BA MOV-373.

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d. Close RH MOV-33A and RH MOV-33B.

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e. Start a charging pump.

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f. QQIQ ECA-1.1, l

LOSS OF EMERGENCY l

COOLANT RECIRCULATION, Step 1. *3 t

IE CHARGING PUMP CAVITAT NG, l IllEN PERFORM TiiE FOLLOWING: ;

a. Equally throttle both core deluge isolation MOVs until operating RHR pump AMPS are less than 220 AMPS.

8 MAINTAIN SEAL INJECTION TO RCPs DURING COOLDOWN I

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CONTINUE COOLDOWN OF l

TIIE RCS TO LESS THAN 200* F l

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JUN 0 31988 NUMBER Tm2 REV. ISSUE /DATE l

E S - 1.3 TRANSFER TO RIIR RECIRCULATION Rev.5 i

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STEP ACTION /EXPECIED RESPONSE RESPONSE NOT OBTAINED NOTE:

WHEN RCS PRESSURE IS LESS THAN 100 PSIG AND RCS l

TEMPERATURE IS LESS THAN 200*F, CONSULT WITH PLANT i

ENGINEERING STAFF PRIOR TO TERMINATING TWO PATH

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RECIRCULATION (TO PREVENT BORIC ACID PRECIPITATION).

l 10 WHEN RCS PRESSURE IS LESS CLOSE SEAL WATER RETURN THAN 100 PSIG VERIFY SEAL MOVs.

WATER RETURN MOVs CLOSED 11 WHENTHE RCS IS AT ATMOSPHERIC PRESSURE PERFORM THE FOLLOWING:

a. Isolate sealinjection to all four RCPs
b. Close CH MOV 2928 and CH MOV 292C i
c. Stop operating charging pump 12 CLOSE RH MOV 33A AND RH MOV 33B 13 OPEN AND LOCK BREAKERS FOR t

RH MOV-33A AND RH MOV 33B l

l 14 RETURN IQ PROCEDURE AND STEP l

IN EFFECT l

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