ML20205A208

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Rev 3 to Emergency Operating Procedure FR-I.3, Response to Voids in Reactor Vessel
ML20205A208
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
FR-I.3, NUDOCS 8810250423
Download: ML20205A208 (15)
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Text

JUN 3 1989 NUMBER MG REV. ISSULDATE i

FR.I.3 UESPONSE TO VOIDS IN REACTOR YESSEL Rev. 3 I.

A.

PURPOSE nis procedure provides actions to respond to voids in the reactor vessel.

B.

SYMPTOMS OR ENTRY CONDITIONS

  • Dtis procedun is entered from F 0 6 INVENTORY C itir cal Safety Function Status Tree on a YELLOW condition.

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JUN 3 1988

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NUMBER EH REY. ISSLTJDATE F R.I.3 RESPONSE TO YOIDS IN REACTOR VESSEL Rev.3

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STEP ACTION /EXPEGED RESPONSE RESPONSE NOT OBTAINED r

7 CAUTION:

IF A CONTR0lLED NATURAL CIRCULATION C00LDOWN IS IN PROGRESS AND A VOID IN THE REACTOR VESSEL UPPER HEAD 15 EXPECTED. THIS PROCEDURE SHOULD NOT BE PERFORMED.

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1 1

CIIECK IF SiliAS BEEN ERMINAED:

a. Check both IIPSI pumps -
a. RETURNIQ pnxedure and step STOPPED in effect.

2 CIIECK IF CilARGING FLOW IIAS BEEN ESTABLISIIED:

a. Check charging pumps-
a. Perform the following:

AT LEAST ONE RUNNLNG

1. Check CCW flow to RCP thermal barriers established.

IE CCW flow to RCP thermal barriers EQIestablished.

THEN close RCP seal water suppl valves GI V M5A throu Ol V 354D.

2. Start one charging pump.
b. Check containment instrument
b. Start one containment instmment air pressure -

air compressor to esta' lish a

GREATT!R T11AN 118 PSIG instrument air pressure.

c. Check chardng flow-
c. Perform the following 1

ESTABLIS (ED

1. Select and place in mannual Cli FCV Il0 DE Gi FCV 110A.
2. Set flow control valve fcr minimum.
3. Oxn GI MOV 292B and CLI MOV 292C.
d. Check charging pump suction -
d. Align charging purrp sucoon to VCT ALIGNED TO VCr by performing the following:

1.

n 01 MOV 257, 2

2.

BA MOV 373 and BA MOV 32-i l

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JUN 3 1988

' REY. ISSUE /DATE Rev.3 RESPONSE TO YOIDS IN REACTOR VESSEL I mu Su mER f

FR.I.3

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RESPONSE NOT OBTAINED t

ACTION /EXPECiliD RESPONSE STEP '

ESTABLISH LETDOWN.

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CifECK LETDOWN IN SERVICE (SEE OPPOSITE PAGE) 3 E LETDOWN CAN NQIDE ESTABLISHED AND CONTAINMENT PRESSUREI LESS TilAN 5 PSIO, HiENESTABLISH ALTER FOLLOWING:

1. Reset Containment HCP WL Relays.

2.Open DH TV 1841, drain header trip

3. Reset solenoid in blowdown valve.

4.Ilne up drain header to VCT:

a. Close DH V 408, drain header to PDT.
b. Open CH V 383, drain header to VCT,
5. Oose breaker for DH.MOV 310.
6. Open one loop drain MOV.7. T PR2Rlevel.
8. Cose CH MOV 292B and CH MOV 292C, ESTABLISH STABLE RCS 4

CONDITIONS:

a. Control charging andletdown
a. Check PRZRlevel STABLE AND flow as necessary.

DETWEEN 40 % AND 60 %

b. Turn on PR2R heaters and us PRZR spray as necessary to stablize
b. Check RCS pressure STABLE RCS pressure.

E normal spray NQIavailable ANDletdownis in service, HIES use auxiliary spray,

c. Dump steam as necessary.
c. Check RCS cold leg temperatures -

STABLE GQIQ STEP 12.

CHECK ALL RCPs STOPPED 5

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Page 3 of 13

JUN 3 1988 NUMBER Tm2 REY. ISSUE /DATE FR.I.3 RESPONSE TO YOIDS IN REACTOR VESSEL Rev. 3

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STT.P ACTION / EXPECTED RESPONSE l

RESPONSE NOT OBTAINED 3

CHECK LETDOWN IN SERVICE ESTABLISH LETDOWN.

(SEE OPPOSITE PAGE) 1 E LE1DOWN CAN NQIBE ESTABLISHED AND CONTAINMENT PRESSURE IS 1

LESS THAN 5 PSIO, THEN ESTABLISH ALTERNATE LE1DOWN BY PERFORMING THE FOLLOWING:

1. Reset Containment HCP WL Relays.
2. Open DH TV 1841, drain header trip 4

i valve l

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 VCT,
5. Oose breaker for DH MOV 310.

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6. Open one loop drain MOV.
7. Thronle DH MOV 310 to maintain PRZR level, i
8. Cose CH MOV 292B and CH MOV 292C.

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4 ESTABLISH STABLE RCS CONDmONS:

a. Check PRZRlevel STABLE AND
a. Controlcharging and leidown BE1 WEEN 40 % AND 60 %

flow as necessary.

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b. Check RCS pressure STABM
b. Turn on PRZR heaters and use normal PRZR spray as necessary to stablire RCS pressure.

E normal spray SQIavailable AND leidown is in wrvice, THEN use auxiliary spray,

c. Check RCS cold leg temperatures -
c. Dump steam as necessary.

STABM 5

CilECK ALL RCPs STOPPED GQIQ STEP 12.

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JUN 3 1988 NUMBER TTT12 REY. ISSUE /DATE FR I.3 DESPONSE TO VOIDS IN REACTOR VESSEL Rev.3

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STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINT9 6

CHECK IF RCS PRESSURE SHOULD BE INCREASED:

a. Check RCS pressure-
a. QQ IQ Step 9.

AT LEAST 100 PSIG LESS THAN TECHNICAL SPECIFICAT10NS SECTION 3.4 FIGURE 3,4 9

b. Check RCS pressure -
b. QQ IQ Step 9.

LESS THAN 1435 PSIG (1665 PSIG FOR ADVERSE CONTAINMENT)

c. Turn on PRZR heaters to increase RCS pressure by 50 PSIG 7

CONTROL CHARGING AND LETDOWN FLOW AS NECESSARY TO MAINTAIN PRZR LEVEL GREATER THAN 15 %

(35 % FOR ADVERSE CONTAINNENT) 8 CHECK RVLIS PLENUM INDICAT10N:

a. Checkindication-INCREASING
a. 00IQ Step 9.
b. Check headindication FULL
b. RETURN IQ Ctep 6.
c. Turn off PRZR heaters as necessary to stabilize RCS pressure
d. RE7URNIQ procedure and step in effcet Page 4 of 13

JUN 3 1988 NMtBER Tm2 REY. !$SUlUDATE FR.I.3 RESPONSE TO YOIDS IN REACTOR VESSEL Rev.3

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STEP ACT10NEXPECTED RESPONSE RESPONSE NOT OBTAINED r

1 CAUTIONt IF RCP SEAL C0011NG FLOW HAD PREVIOUSLY BEEN LOST, THE AFFECTED RCP(s) SHOULD NOT BE STARTED PRIOR TO AN ENGINEERING STATUS EVALUATION.

NOTEt RCPs SHOULD BE RUN IN ORDER OF PRIORI 7Y TO Pl.'0 VIDE NORhfAL PRZR SPRAY.

9 TRY TO START ONE RCP:

a. Establish the following conditions
a. IE conditions can b'QI be established.

prior to starting RCP:

THEN GQ IQ Step 12.

1. Check PRZR level.

GREATER THAN 75 %

(90 % FOR ADVERSE CONTAINMENT)

2. Check RCS subcooling based on core exit thermocouples AT LEAST @ F (SEE OPPOSTE PAGE FOR ADVERSECONTAINMENT)
3. Place a jumper across designated terminals on # 2 horizontal temunal board in upper RCP breaker cabinet:

RCP Terminal #

Wire #

1 8 to 9 Pl71P2 to Pl71P4 2

8 to 9 Pl72P2 to Pl72P4 3

8 to 9 Pl73P2 to Pl73P4 4

8 to 9 Pl74P2 to Pl74P4 l

4. Start oillift pump
5. Insure seal water and com rnent I

cooling wate supplied to 3CP

6. Insure lower bearing temperature t

is less than 170* F

7. Check RCS pressure greater than 300 PSIO i

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JUN 3 1988 NUMBER TTT12 REY. ISSUE /DATE s

FR.I.3 UESPONSE TO VCIDS IN EEACTOR VESSEL Rev.3 t

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 9

8. Check open CH TV 240,
8. Oxn CH TV 240, CH TV 241 and CH TV 241 and CH TV 334.

C i TV 334 (scal water return trip valves)

9. Check open CC TV 1411
9. Open CC TV.1411 (RCP oil cooler CCW return trip valve) 10 Open seal water return MOV
b. Start selected RCP
c. Align PRZR spray valves 10 CIIECK RVLIS HEAD G.Q IQ STEP 12.

INDICAES FULL 11 GQ10 SEP 21 12 OBTAIN CONTAINMENT HYDROGEN CONCEV. IRATION MEASUREMENT USING PASS r

7 CAUTIONt o

F0lLO%'ING BLDCK OF AUTOMATIC St ACTUATION SIGNAL MANUAL St ACTUATION MAY BE REQUIRED IF CONDITIONS DEGRADE.

o St ACTUATION CIRCUTS %'lLL AUTOMATICALLY UNBLOCK %' HEN PRESSURIZER PRESSURE INCREASES TO GREATER THAN 1873 PS!G.

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13 CHECK IF LOW PRZR PRESSURE SI CAN BE BLOCKED:

a. Check PRZR pressure -
a. Decrease PRZR stessure to less than LESS T11AN 1800 PSIO 1800 PSIG using normal spray.

E normal spray NOIavailable.

AND letdown is in senice,

'lilEN use ausiliary spray.

E auxiliary spray NQIavailable.

IIIEN use one PRZR PORV.

b. Block Sl actuation using Si block switch I

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JUN 3 1988 NUMBER 777 3 REY. ISSLT& ATE i

FR.I.3 RESPONSE TO VOIDS IN REACTOR VESSEL Rev.3 i

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$TT.P ACDON/ EXPECTED RESPONSE RESPONSE NOT OBTAINED j

14 RECORD RCS PRESSURE RCS pressure 15 ESTABLISH FOLLOWING RCS CONDri1ONS:

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a. Check PRZRlevel STABLE AND
a. Control charging and letdown i

BETWEEN 40 % AND 60 %

flow as necessary.

b. Check RCS pressure STABLE
b. Turn cm PRZR heaters and use normal l

PRZR spray as necessary to stablize RCS pressure.

E normal spray NCE available AND leidon is in service, 3

3 THEN use auxiliary spray.

c. Check RCS subcooling based on
c. Dump steam as necessary.

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core exit thermocouples -

GREATER THAN 82* F (SEE OPPOSilT PAGE J

FOR ADVERSE COSTAINMENT) l

d. Check RCS cold leg temperatures -

d Dump steam as necessary.

l STABLE l

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16 PREPARE COSTAINMENT FOR l

REACTOR VESSEL VENTINO:

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a. Isolate containment i

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b. Start all available CARFANs
c. Obtain pmnission from Director of y

j Emergency Operah j

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JUN 3 1988 NUMBER TTTM REY. IS$ULDAR s

F R. I.,3 RESPONSE TO VOIDS IN REACTOR VESSEL Rev.3 l

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SnP AcnON/ EXPECTED RESPONSE RESPONSE NOT O'lTAINED 17 DETRMINE MAXIMUM ALLOWABLE VENTING TIME:

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a. Check containment hydrogen
a. Decrease hydrogen concentration concentradon -

in containmnet.

l LESS THAN 3 % IN DRY AIR

b. Determine nasimum venting tirne (SEE ATTAQ{ MENT A) i
c. los maximum allowed venting time allowable venting time

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d. Log RCS pressure r

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l RCS pressure

e. Leg containment hydrogen concentradon hydrogen concentration I

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JUN 3 1988 NUMPER TTlu REV. ISSUE /DAF FRoI.3 RESPONSE TO VOIDS IN REACTOR VESSEL Reve3

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STEP l ACDON/EXPECED RESPONSE RESPONSENOTOBT INED 18 REVIEW REACTOR VESSEL VENTING

'II!RMINA110N CRITERIA:

a. When any one of the following conditions exist, reactor vessel venting should be stopped:

o PCS.iubcooling based on core esit thermocouples -

LESS THAN 32' F (SEE OPPOSITE PAGE FOR ADVERSE CONTAINMEN"O 2

o PRZR level LESS THAN 15 %

(35 % FOR ADVERSE CONTAINMENT) 2 o RCS pressure -

DECREASES BY 200 PSIG i

2 o Venting tine -

GREATER THAN MAXIMUM TIME CALCULATED IN STEP 17 2

o RVLIS headindicates-FULL 19 VENT REACTOR VESSEL:

a Open teth valves in one vent path

a. IE eimer valve fails to open, reclose both valves, THEN open both valves in the other vent path.
b. Check venting termination criteria -
b. Continue venting.

ANY EXCEEDED WHEN any termination criteria is

exceeded, 111EN do step 19 c.
c. Close all vent valves Page 9 of 13

JUN 3 1988 NUMBER TTRE REV. ISSUE /DATE FR.I.3 RESPONSE TO VOIDS IN REACTOR VESSEL Rev. 3 STEP ACDON/ EXPECTED RESPONSE RESPONSE NOT OBTAINED 20 CHECK RVLIS HEAD INCREASE RCS PRESSURE TO INDICATING FULL PRESSURE RECORDED IN STEP 14.

RETURNIQ STEP 15.

21 CHECK PRZR LEVEL STABLE CONTROL CHARGING AND LETDOWN FLOW AS NECESSARY.

22 RETURNIQ PROCEDURE AND STEP IN EFFECT END Page 10 of 13

JUN 3 1988 NUMBER TME REV ISSUE /DAE FR.I.3 RESPONSE TO VOIDS IN REACTOR VESSEL Rev.3 l.

ATTACHMENTA I

REACTOR VESSEL HEAD VENTING PERIOD GUIDELINE l

1.

Determine the containment hydmgen concentration in volume percent units.

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NOTE:

The containment hydrogen concentration will be insignificant if there has been no leakage from the RCS to the containment.

2.

From Curve # 1 ( RCS Pressure vs. H Venting Time ) using the initial containment 2

hydrogen emcentration from Step 1, determine the allowable venting period which will limit the concentration to 3 volume percent.

PRESSURIZER VENTING PERIOD GUIDELINE 1.

Determine the containment hydrogen concentradon in volurne percent units.

From Curve # 1 ( RCS Pressure vs. H Venting Time ) using the initial containment 2.

2 hydrogen concentration from Step 1, determine the allowable enting period which will limit the concentration to 3 volume percent.

3.

Determine the pressurizer water level from pressurizer level instrumentation.

4.

From Curve # 2 ( RCS Pressure vs. Pressurizer Venting Time ), determine the venting time to remove the mass equivalent of hydrogen from the pressurizer steam space.

5.

Use the shonest of the two venting times determined in steps #2 and #4, Page 11 of 13

JUN 3 1988 NUMBER TTI1E REV. ISSUE /DATE FR.I.3 RESPONSE TO VOIDS IN REACTOR VESSEL Rev.3

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CURVES VALID ONLY IF:

- RCS OUTLET TEMPERATRURE. 2 212' F.

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RCS PRESSURE.52500 PSIA.

CONTAll; MENT TEMPERARTRE. < 225' F.

2400

. CONTAINMENT PRESSURE 214.7 PSIA.

- CONTAINMENT H CONCENTRATION < 2.9 % VOL 2

- CONTAINMENT CARFANS RUNNING.

2000 --

RCS PRESSURE._

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( PSIA )

1600 -- -

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2 30 40 50 A110WABIE VENT 1BIE CURVE #1

( MINUTES )

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Docket ho. 50-245 A07413 Millstone Nuclear Power Station, Unit No. 1 Emergency Operating Procedures t-October 1988

500 UNIT 1 EMERGENCY PROCEDURES INDEX (Procedures require PORC review)

OFF NORMAL PROCEDURES

, NUMBER TITLE REV.

EFF. DATE E0P 569 E0P Administration Procedure 1

03/20/84 I

E0P 570 RPV Level Control Emergency Procedure 3

05/20/88 E0P 571 RPV Level /Rx Power Control Emergency Proce.iure

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05/20/88 E0P 572 Reactor Power Control Emergency 2

01/28/87 Operating Procedure E0P 573 RPV Srray Cooling Emergency Procedure 2

05/20/88 E0P 574 RPV Steam Cooling Emergency Procedure 2

05/20/88 E0P 575 RPV Level /Rx Power Control Emergency 2

05/20/88 Procedure E0P 576 RPV Level Restoration Emergency Procedure 1

03/20/84 E0P 577 Emergency RPV Depressurization Emergency 1

03/20/84 Procedure E0P 578 RPV Flooding Emergency Procedure 1

03/20/84

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E0P 579 Alternate Shutdown Cooling Emergency 1

03/20/84 Procedure E0P 580 Containment Control Emergency Procedure 2

05/20/88

{

l Rev. 119 l

08/08/88 Page 1 of 1 f

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