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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c. JUN 3 1988

, 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 13 PDR ADOCK h$000 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 L Jll 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). l

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 -

j IN SERVICE

}

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 Page 2 of 9

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 sam 31e 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.

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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 7 CAUDON:

j 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 %

(67 % and 69 % for adverse contamment) l!

9 CIIECK RCS VENT AND l DRAIN PAniS CLOSED: l i

i

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

Page 6 of 9

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

l l

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