ML20204J786

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Rev 3 to Emergency Operating Procedure ECA-0.1, Station Blackout Recovery W/O Steam Injection Required
ML20204J786
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
ECA-.1, ECA-0.1, NUDOCS 8810250252
Download: ML20204J786 (10)
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Text

h JUN 0 31988 bMBER TME REV. ISSUE /DATE EC A 0.1 STATION BLACKOUT RECOVERY Rev. 3 WITHOUT SI REQUIRED g

A.

PURPOSE This procedure provides actions to use normal operational systems to stabilize plant conditions fullowing restoration of ac emergency power.

B.

SY51PTO51S OR ENTRY CONDITIONS This procedure is entered from ECA 0.0, STATION BLACKOUT, Step 29, when ac emergency power is restored and SI is not required.

i 8010250252 001007 Page 1 of 10 PDR ADOCK 05000213 P

PDR

s JUN O 31988 1

suiBER EU REV. ISSUE /DAH EC A 0.1 STATION BLACKOUT RECOVERY Rev.3 WITIIOUT SI REQUIRED S'EP ACTION /EXPECED RESPONSE RESPONSE NOT OBTAINED r

7 CAUTION:

THE LOADS PLACED ON THE ENERGlZED AC EhfERGENCY BUS SHOULD NOT EXCEED THE CAPACITY OF THE DIESEL GENERATOR (2850 KW EACH)

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NOTE:

CRITICAL SAFETY FUNCTION STATUS TREES SHOULD BE l

Sf0NITORED FOR INFORSfATION ONLY. FUNCTION RESTORATION PROCEDURES SHOULD NOT BE lbfPLEhfENTED PRIOR TO CObfPLETION OF STEP 8.

1 CHECK RCP SEAL ISOLATION STATUS:

a. Check sealinjecdon supply valves
a. E valves are open (CH.V-354A through D)-

QR valve positions are b'QI known, CLOSED THEN check status of charging pumps:

1. E charging pump running.

l THEN QQIQ Step 2.

2. E charging pump b'QI running, 111EN locally close seal supply valves before starting a charging pump.
b. Check RCP thermal barrier
b. E valve is open manual CCW return isolation DR valve position is b'QIknown, valve (CC-V 841)-

THEN check status of CCW pumps:

CLOSED

1. E a CCW pump is running, THEN Q_Q IQ Step 2.
2. E a CCW pump is b'QI running, THEN locally close valve.

2 CHECK SI AND CONTAINMENT PERFORM 'IllE FOLLOWING:

ISOLATION NOT ACTUATED

a. Reset Si and containment isoladon (SEE OPPOSITE PAGE).
b. Establish OR check in service containment instrument air system.

Page 2 of 10

i JUN 0 31988 NUMBER TTTLE REV. ISSUE /DATE EC A 0.1 STATION BLACKOUT RECOVERY Rev.3

(

WITHOUT SI REQUIRED STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 3

htANUALLY LOAD THE FOLLOWING EQUIPMENT ON AC EMERGENCY BUS

a. Checkcontrolair AVAILABLE
a. Start one control air compressor,
b. Establish CCW Gow:
1. Check system valve alignment
1. Manually OR locally align valves as necessary.
2. Start one CCW pump
c. Establish charging Dow:
1. Check VCT makeup contml system:
a. Check controls set for -
a. Set controls for automatic.

AUTOMATIC

b. Check blender ratio set at -
b. Set blender ratio for greater than GREATER THAN RCS RCS bomn concentration.

BORON CONCENTRATION

2. Check suction valve alignment:
2. Manually align valves as necessary.

IE Vcris b'QIavailable.

a. Check VCT suction valve THEN align suction to RWST:

CH MOV 257 - OPEN o Open RWST suction.

b. Check RWST suction valves BA MOV-373.

BA-MOV-373 CLOSED o Close VCT suction, CH MOV 257.

3. Check one charging pump - RUNNING
3. Start one charging pump.
4. Control charging Dow to maintain PRZR level
d. Energize MCC(s) as necessary by performing the following:
1. Strip all non essentialloads from MCC(s) to be energized
2. Close su? ply breaker for MCC to be energized I

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s JUN 0 31988 NUMBER TITLE REV. ISSLT/DATL i

E C A.O.1 STATION dLACKOUT RECOVERY Rev. 3 WITHOUT SI REQUIRED l

t STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED i

4 VERIFY SI FLOW NOT REQUIRED:

a. Check RCS subcooling based c,n
a. QQIQ ECA 0.2, core exit thermocouples -

STATION BLACKOUT RECOVERY GREATER MAN 32' F WITH SI REQUIRED, Step 1.

(SEE OPPOSITE PAGE FOR ADVERSE CONTAINMENT)

b. Check PRZR level-
b. Control charging flow to maintain GREATER WAN 10 %

PRZR level greater than 10 %

(24 % FOR ADVERSE (24 % for adverse containment).

CONTAINMENT)

IElevel can NQIbe maintained, THEN QQ IQ ECA 0.2, STATION BLACKOtJT RECOVERY WITri SI REQUIRED, Step 1.

5 CHECK PRZR LEVEL CONTROL CHARGINO FLOW AS GREATER THAN 15 %

NECESSARY TO MAINTAIN PRZR (35 % FOR ADVERSE LEVEL CONTAINMENT) t I

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JUN 0 31988 NUMBER TITLE REY. ISSUE /DATE l

e EC A 0.1 STATION BLACKOUT RECOVERY Rev.3 WITHOUT S1 REQUIRED j

(

STEP ACTION /EXPECIED RESPONSE RESPONSE NOT OBTAINED r

7 CAUTION:

Af0NITOR D%'ST l.EVEL. START SfAKEUP TO DWST BEFORE LEVEL DECREASES TO 54,000 GALLONS.

J 6

CHECK INTACT SG LEVELS:

a. Check wide range levels -
a. Maintain total AUX feedwater flow GREATER THAN 63 %

greater than 320 GPM until wide (67 % FOR ADVERSE range levelin at least one SG is CONTAINMENT) greater than 63 %

(67 % for adverse containment),

b. Control AUX feedwater flow to maintain wide range levels between 63 % and 69 %

(67 % and 69 % for adverse contamment) 7 MAINTAIN SG PRESSURE AT EXISTING PRESSURE USING OST l

DR BOTH OF THE FOLLOWING-I o Atmospheric vent valve, o Terry Turbine steam supply valves.

8 PLACE THE FOLLOWING PUMP CONTRO'., SWITCHS IN STANDBY:

o HPSI pumps I

o LPSI pumps i

Page 5 of 10

JUN 0 31988 NUMBER TTT12 REV. ISSLT/DATE EC A 0.1 STATION BLACKOUT RECOVERY Rev.3 g

WITHOUT SI REQUIRED STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED F

7 CAUTION:

o RCP THERSfAL BARRIER COOUNG SHOULD BE ESTABUSHED SLOWLY TO hilNihil2E POTENTIAL INTRODUCTION OF STEAbf INTO THE CCW SYSTEht.

o RCP SEAL INJECTION SHOULD BE ESTABUSHED SLOWLY TO hilNibf/ZE RCP THERSfAL STRESSES AND POTENTIAL SEAL FAILURES. UbflT COOLDOWN RATE ON LOWER BEARING TO 1

  • F PER hilNUTE.

o AS PART OF SUBSEQUENT RECOVERY ACTIONS, RCPs SHOULD NOT BE STARTED PRIOR TO AN ENGINEERING g

STATUS EVALUATION.

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NOTE:

FUNCTIONAL RESTORATION PROCEDURES SfAY NOW BE lbfPLEhfENTED AS NECESSARY.

9 ESTABLISH NORMAL COOLING i

FLOW TO RCPs:

i

a. Check RCP lower bearing
a. Perform the following:

temperature -

LESS THAN 170* F

1. Close RCP thermal banier nunual return isolation valve (CC V 841).
2. Close RCP seal supply valves (CII V 345A through D).
3. Start one CCW pump.
4. Stan one charging pump.
5. Slowly open RCP thermal banier manual return isolation valve.
6. WHENlower bearing temperature is less than 170' F, 11111N slowly initiate RCP seal water Dow.
7. QQIQ Step 10.
b. Establish RCP normal cooling now IN ACCORDANCE WITli, NOP 2.81, OPERABON OF COMPONENT COOLING SYSTEM, I

AND NOP 2.6-1, SEAL WAniR STARTUP NORMAL OPERATION.

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JUN 0 31988 NUhGER EU REV. ISSUE /DAE

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EC A 0.1 STATION BLACKOUT RECOVERY Rev.3 WITHOUT SI REQUIRED l

t SHP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 10 CHECK IF RCP SEAL WATER RETURN FLOW (s)IS GREATER THAN 0.2 GPM 11 ESTABLISH LETDOWN IE CONTAINMENT PRESSURE IS (SEE OPPOSITE PAGE)

LESS THAN 5 PSIO, THEN ESTABLISH ALTERNA*E LETDOWN BY PERFORMING 'ITIE FOLLOWING:

1. Reset Containment HCP WL Relays.
2. Open DH TV 1841, drain header uip valve.
3. Reset solenoid in blowdown room for drain header trip valve, DH TV 1847.
4. Une up drain header to VCT:
a. Close DH V-408, drain header to PDT.
b. Open CH V-383, drain header to V C T.
5. Close breaker for DH MOV-310.
6. Open one loop drain MOV.
7. Throttle DH MOV 310 to maintain PRZR level.
8. Close CH MOV-292B and CH MOV 292C.

12 CONTROL CHARGING AND LEEOWN FLOWTO MAINTAIN PRZR LEVEL BE'lWEEN 15 % AND 50 %

( 35 % AND 50 % FOR ADVERSE CONTAINMENT) 13 ESTABLISH PRZR PRESSURE CONIROL:

a. Checkletdown IN SERVICE
a. Use PRZR heaters AEQ one PR.ZR PORV to mr.intain RCS pn:ssure.

QQIQ Step 14.

b. Use PRZR heaters AFD auxiliary spray to maintain RCS pressure Page 7 of 10

JUN 0 31988 51TMBER TT112 REV, ISSUE /DATE E C A-0.1 STATION BLACKOUT RECOVERY Rev.3 WITHOUT SI REQUIRED STEP ACT10N/EXPECIED RESPONSE RESPONSE NOT OBTALNED 14 VERIFY NATURAL CIRCULATION:

INCREASE DUMPING STEAM FROM INTACT SG(s).

o Check RCS subecoling based on l

core exit thermocou les -

GREATER THAN 2' F l

(SEE OPPOSITE PAGE l

FOR ADVERSE CONTAINMENT) o Check SG pressures -

l STABLE 2 DECREASING o Chech RCS TAVG -

STABLE 2 DECREASING o Check core exit thermocouales -

STABLE 2 DECREAS.NG o Check RCS cold leg temperatures -

AT SATURATION TEMPERATURE FOR SG PRESSURE 15 CHECK SOURCE RANGE DE'ECTORS ENERGIZED:

a. Check intermediate range flux -
a. Continue with step 16, l

LESS DIAN 5 x 10'10 AMPS WHEN less than 5 x 1010 AMPS, THEN do steps 15 b, e and d.

b. Verify source range detectors -
b. Manually energize source range ENERGlZED detectors,
c. Transfer nuclear flux recorders to source range scale
d. Transfer SUR meters to source range l

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JUN 0 31988 NUMBER TTI12 REV. ISSUE /DATE EC A 0.1 STATION BLACKOUT RECOVERY Rev.3 WITHOUT SI REQUIRED STEP ACTION /EXPECIED RESPONSE RESPONSE NOT OBTAIhTD 16 VERIFY ADEQUATE SHUTDOWN hiARGIN:

a. Sample RCS
b. Check shutdown margin -
b. Borate RCS as necessary.

ADEQUA'IE 17 hiAlhTAIN PLAST CONDITIONS STABLE:

o RCS pressure o PRZRlevel o RCS temperatures o Intact SG levels 18 VERIFY SI FLOW NOT PJQUIRED:

a. Check RCS su'aooling based on
a. GQIQ ECA 0.2, core exit thermocouples -

STATION BLACKOUT RECOVERY GREATER THAN 32' F WITH SI REQUIRED, Step 1.

(SEE OPPOSITE PAGE FOR ADVERSE CONTAINhiEbT)

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b. Check PRZR level-
b. Control charging flow to maintain GREATER THAN 15 %

PRZR level.

t

( 35 % FOR ADVERSE CONTAINhiEhT)

IE PRZR level can EQIbe maintained.

THEN QQIQ ECA 0.2 STA'nON BLACKOUT RECOVERY WITH SI REQUIRED, Step 1.

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JUN 0 31988 NUMBER TTTIE REY. ISSLT/DATE EC A 0.1 STATION BLACKOUT RECOVERY Rev.3

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WITHOUT SI REQUIRED STEP ACTION /EXPECIED RESPONSE RESPONSE NOT GBTAINED l

19 BlY TO RESTORE OIT-SITE POWER TO AC BUSES (SEE OPPOSITE PAGE) 20 QQ IQ ES-0.2, NARJRAL CIRCULATION COOLDOWN, Step 1 END P

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