ML20204J939

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Rev 2 to Emergency Operating Procedure FR-C.1, Response to Inadequate Core Cooling
ML20204J939
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-C.1, NUDOCS 8810250294
Download: ML20204J939 (9)
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Text

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JUN 3 1988 c.

NUMBER TTlu REV. ISSUE /DATE FR C.1 RESPONSE TO INADEQUATE CORE COOLING Rev. 2 A.

PURPOSE nis procedure provides actions to restore core cooling.

B.

SYMPTOMS OR ENTRY CONDITIONS This procedure is entered fmm F-0.2, CORE COOLING Critical Safety Function Status Tree, on either RED condition.

i Page 1 of 9 80102502N h$000 13 PDR ADOCK PDR 1

P

JUN 3 1988 NUMBER TIT 12 REY. ISSLTJDATE FR C.1 RESPONSE TO INADEQUATE CORE COOLING Rev.2 I

.J STEP ACT10N/ EXPECTED RESPONSE RESPONSE NOT OBTAINED r

7 CAUTION 1 IF THE KW:T LEVEL DECREASES TO LESS THAN 130,D0 GALLONS, THE SI SYSTEM SHOULD BE ALJGNED FOR

\\

RHR RECIRCULA7 ION USib'G ES 13, TRANSFER TO RHR l

RECIRCULATION Jll L

l l

1 VERIFY S1 VALVES IN PROPER hiANUALLY ALIGN VALVES AS l

Eh1ERGENCY ALIGNhiENT NECESSARY.

j 2

VERIFY SI FLOW IN ALL TRAINS:

START PUbiPS AND ALIGN VALVES AS NECESSARY.

o Check charging pump flow indicators -

TRY TO ESTABLISH ANY OTTIER INDICATE FLOW 111G11 PRESSURE INJECTION SOURCE OR PATTI:

o Check llPSI pump Ah1P meters -

GREATER TliAN 115 AhtPS o Start metering pump and adjust for nuxtmum speed.

o Check LPSIpump AhiPmeters-GREABiR T11AN 60 AhiPS o IJne up for fill headerinjection:

I

a. Open all four loop fill header hiOVs.

i

b. Open fill header flow control valve (FH FCV 295) and bypass valve (Fli htOV 344).

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c. Ensure charging pumps running.

i 3

CliECK RCP SUPPORT SYSTEhtS TRY TO ESTABLISil SUPPORT AVAILABIA SYSTEhtS.

i r

o Check Component Cooling Water j

System -

IN SERVICE j

}

o Check RCP seal water supply and I

retum system -

1 IN SERVICE 4

CliECK CORE EXIT QQIQ STEP 7.

4 111ERhiOCOUPLES.

I LESS T11AN 1200' F l

l l

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JUN 3 1988 NUMBER Tm2 REV. lSSLTJDATE I

FR C.1 RESPONSE TO INADEQUATE CORE COOLING Rev.2 STEP ACT10N/ EXPECTED RESPO!!,E RESPONSE NOT OBTAINED 5

CHECK RVLIS PLENUM INDICABON:

a. Check indication -
a. E increasinJ, GREATER Di&N 15 %

IEEN RET JRNIQ Step 1.

E NOIincreasing, l

DIEN QQIQ Step 6.

j

b. RERJRN IQ procedure and I

step in effect l

6 CHECK CORE EXIT i

MERMOCOUPIES:

a. Check temperature -
a. E decreasing, LESS TilAN 700' F TIEN RETURNIQ Step 1.

E EQIdecreasing.

TlIEN QQIQ Step 7.

NOTE:

THIS PROCEDURE SHOULD BE CONTINUED WHILE I

OBTAINING HYDROGEN SAMPLE IN STEP 7.

i 7

CIECK CONTAINMENTIIYDROGEN CONCENTRADON:

a. Obtain a containment air sam31e with the Post Accident Samping System
b. Check liydrogen concentration -
b. Corsult plant engineering staff for l

LESS DIAN 6.0 % IN DRY AIR additional recovery actions.

QQIQ Step 8.

i Page 3 of 9

JUN 31988 NUMBER TTT12 REV. ISSLTJDATE i

F R.C.1 RESPONSE TO INADEQUATE CORE COOLING Rev. 2 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINTD i

r j

7 CAUDON:

o MONITOR DWST LEVEL. START MAKEUP TO DWST BEFORE LEVEL DECREASES TO S4,000 GALLONS.

o A FAULTED OR RUPTURED SG SHOULD NOT BE USED IN SUBSEQUENT STEPS UNLESS NO INTACT SG 15 A VAILABLE.

L J

8 CIIECK INTACT SG LEVELS:

a. Check wide range levels -
a. Increase total AUX feedwater flow GREATER DIAN 63 %

to restore wide range level in at least (67 % FOR ADVERSE one SG to greater than 63 %

CONTAINMENT)

(67 % for adverse containment).

IE total AUX feedwater flow is less than 320 GPM, IHEN 00IQ Step 16 OBSERVE NOTE PRIOR TO STEP 16.

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

l!

(67 % and 69 % for adverse contamment) 9 CIIECK RCS VENT AND l

l DRAIN PAniS CLOSED:

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a. Check power to PRZR PORY
a. Restore power to PRZR PORV block valves -

block valves.

AVAIIABIE i

i

b. Check PRZR PORVs CLOSED
b. Manually close PRZR PORVs.

l IE any PORV can b'QI be closed, 111EN nunually close its block valve. l

c. Check other RCS vent paths -
c. Manually OR locally close any open I

CLOSED RCS vent paths.

d. Check drain header ISOLATED
d. Close all four loop drain header MOVs.
e. Checkletdown ISOLA 11ID
e. Close letdown isolation valve ll>MOV 200 Page 4 of 9

JUN 31988 NUMBER TT!12 REV. ISSUE /DATE FR C.1 RESPONSE TO INADEQUATE CORE COOLING Rev.2 i

S17.P ACT10N/ EXPECTED RESPONSE RESM)NSE NOT OBTAINED NOTE:

PARTIAL UNCOVER)NG OF SG TUBES IS ACCEPTABLE IN THE FOLLOWING STEPS.

10 DEPRESSURIZE ALL INTACT SGs AT MAXIMUM RATE:

f I

a. Dump steam to condenser at
a. Dump steam at maximum rate I

maximum rate using the fo!!owing:

o Atmospheric vent valve.

i o Terry Turbine steam supply valves.

b. Check SG pressures DECREASING
b. E b'QI dec:-asing, 111EN QQIQ Step 16 OBSERVE NOTE PRIOR TO STEP 16.

11 CliECK IF RCPs SilOULD BE STOPPED:

a. Check at least two hot leg
a. E RCS hot leg temperatuns temperatuns -

decreasing, LESS T11AN 350' F TilEN RETURMIQ Step 8, l

E b'QIdecreasing, IliEN GQIQ Step 16.

OBSERVE NOTE PRIOR TO STEP 16.

b. Stop all RCPs 12 DEPRESSURIZE ALLINTACT SGs TO 50 PSIO:
a. Dump steam to condenser at a.Du steam at ma.dm m rate ma.dmum rase usin the following:

o Atmos >heric vent valve.

o Terry Tuttine steam supply valves.

l Page 5 of 9

ww..

o 4J0o NUMBER TTI12 REV. ISSt'E/DA1T.

FR.C.1 RESPONSE TO INADEQUATE CORE COOLIhu Rev.2 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTALNED 13 VERIFY SI FLOW:

CONTINUE EFFORTS TO ESTABLISH SI FLOW, o Cherv kWSTlevel DECREASING

'mY TO ESTABLISH ANY OTTIER IIIGH PRESSURE INJECTION PAT 1{.

o Check charging line flow IE CORE EXITTIIERMOCOUPLES Indicators INDICATE FLOW LESS TliE 1200* F.

TIIEN RERJRNIQ STEP 12.

lE b'M LESS THAN 1200' F.

o Check HPSI pump AMPS -

THEN QQIQ STEP 16, GREATER T11AN 115 AMPS OBSERVE NOTE PRIOR TO ST11P 16.

3 o Check LPSI pump AMPS -

GREATER 1TIAN 60 AMPS 14 CIIECK CORE COOLING:

a. Check core exit thermocouples -

a.

QQIQ Step 16 OBSERVE NOT2 LESS TRAN 1200' F PRIOR TO STEP 16.

b. Check at least two hot leg
b. RETURNIQ Step 12.

Lb 350'F

c. Check RVLIS slenum indication -

c.

RETURNIQ Step 12.

GREATER H AN 15 %

i i

15 QQIQ E 1, LOSS OF REACIOR OR SECONDARY COOLANT, S'17.P 12 l

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f JUN 3 588 NUMBER

"!TT12 REY. ISSUE /DATE F R.C.1 RESPONSE TO INADEQUATE CORE COOLING Rev.2 t

STEP ACTION / EXPECTED RESPONSE RFSPONSE NOT OBTALNED NOTEt NORMAL CONDITIONS ARE DESIRED BUT NOT REQUIRED FOR STARTING THE RCPs.

16 CHECK CORE EXIT START RCPs AS NECESSARY UNTIL THERMOCOUPLES -

CORE EXITTHERMOCOUPLES LESS THAN 1200' F ARE LESS THAN 1200* F.

PERFORM 'n{E FOLLOWING:

a. Try to start an RCP-
1. Place a umper across designated terminaIs on # 2 horizontal terminal botrd 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 P!74P2 to Pl74P4

2. Start oillift pump.
3. Open CH TV 240, CH TV 241 and CH TV 334.

(scal water return trip valves)

4. Open CC TV-1411 (RCP oilcooler CCW rerum trip valve)
5. Open seal water rerum MOV.
6. Start selected RCP.

E core exit thermocouples are greater than 1200* F M all available RCPs are running, MEN own all PRZR PORVs and block va,ves.

E core exit the mocouples are greater than 12(k. F M all PRZR PORVs and block valves are open, T11EN open all other RCS vent paths to containment.

Page 7 of 9

JUN 3 1988 NmSER m

REY. ISSUESATE F R.C.1 RESPONSE TO INADEQUATE CORE COOLING Rev.2 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 17 TRY TO LOCALLY DEPRESSI.10ZE ALL LNTACT SGs TO ATMOSPHERIC PRESSURE:

a. Use any QR allof the following:
3. Use faulted QR ruptured So, o Atmospheric vent valve o liog Jet steam supply valves o Steam supply valves to the auxiliary feedwater pumps o Steam line "pecker head" vent valves 18 CHECK IF RCPs SHOULD BE STOPPED:
a. Check at least two hot leg
a. QQIQ Step 19.

temperatures -

LESS TilAN 350* F

b. Stop all RCPs
1. Close all four seal water i

retum MOVs l

2. IE containment pressure is greater than 5 PSIG, 111EN perform the follutig:
a. Close CH W 240, CH TV 241 (Seal water retum trip valves),
b. Close CC-W 1411 (CCW retum frnm RCP oil coolers) e Page 8 of 9

JUN 3 1988 NUMBER TTTLE REV. ISSULDATE F R.C.1 RESPONSE TO INADEQUATE CORE COOLING Rev.2 i

STEPf ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED i

19 VERIFY SI FLOW:

CONTINUE EFFORTS TO ESTABLISH SI FLOW.

o Check RWSTlevel DECREASING BtY TO ESTABLISH ANY ODIER OR HIGH PRESSURE INJECTION PADi. ;

o Check charging line flow indicators -

RETURNIQ STEP 16.

I INDICARI FLOW l

DE o Check HPSI pump AMPS -

GREATER THAN 115 AMPS o Check LPSI pump AMPS -

GREATER DIAN 60 AMPS i

20 CHECK CORE COOLING:

RETURNIQ STEP 16.

o Check RVLIS plenum indication -

GREATER THAN 15 %

l o Check at least two RCS hotleg temperatues -

I LESS THAN 350' F l

21 GQIQ E 1, LOSS OF REACTOR OR SECObtARY COOLAST. STEP 12.

1 Eht l

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