ML20204J947
| ML20204J947 | |
| Person / Time | |
|---|---|
| Site: | Millstone, Haddam Neck, 05000000 |
| Issue date: | 06/03/1988 |
| From: | CONNECTICUT YANKEE ATOMIC POWER CO. |
| To: | |
| Shared Package | |
| ML20204H467 | List:
|
| References | |
| FR-C.2, NUDOCS 8810250297 | |
| Download: ML20204J947 (7) | |
Text
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NUMBER TTT12 REY. !$SLTJDATE FR.C.2 RESPONSE TO DEGRADED CORE COOLING Rev. 2 i
A.
PURPOSE l
Dis procedure provides acdons to restore adequate cca cooling.
B.
SYMPTOMS OR ENTRY CONDITIONS Dis procedure is entered from F 0.2, CORE COOLING Critical Safety Function Status Tree, on and ORANGE condition.
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Page 1 of 7 8810250297 estooy p
ADOCK 05000213 J
DR PDR
JUN 3'988 NUMBER Tm2 REY. ISSUE /DATE FR C.2 RESPONSE TO DEGRADED CORE COOLING Rev.2 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED l
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,i CAUTION:
IF THE RWST LEVEL DECREASES TO LESS THAN 130.000 GALLONS, THE SI SYSTEM SHOULD BE AUGNED FOR RHR RECIRCULATION USING ES 1.3, TRANSFER TO RHR RECIRCULATION.
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VERIFY SI VALVES IN PROPER hiANUALLY ALIGN VALVES AS l
EhiERGENCY ALIGNhtEST NECESSARY.
E SI VALVES b'QIOPERABLE, l
HEN USE FILL llEADER BY j
PERFORMING TiiE FOLLOWING:
- c. Start both charging pumps
2 VERIFY SI FLOW IN ALL DIAINS:
- a. Check charging pump flow
- a. Start charging pumps and aligt valves indicators -
as necessary.
INDICADI FLOW
- b. Check }{PSIpump AMPineters-
- b. Start liPSI pumps and align valves GREATER TIIAN 115 AhtPS as necessary.
E SI MOVs NQIoperable DIEN use fill header valves.
- c. Check RCS pressure -
- c. QQIQ Step 3.
LESS TliAN 405 PSIG (635 PSIG FOR ADVERSE CONTAINMENT)
- d. Start LPSI pumps and align valves GREATT.R DIAN 60 AMPS as necessary.
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JUN 3 1988 NMiBER TTIM REY. ISSUE /DATE FR.C.2 RESPONSE TO DEGRADED CORE COOLING Rev.2 1
i STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 3
CHECK RCS VENT Aht DRAIN PATHS CLOSED:
- a. Check power to PRZR PORY
- a. Restore power to PRZR PORY block valves -
block valves.
1 AVAIIABLE
- b. Check PRZR PORVs CLOSED
- b. hianually close PR2R PORVs.
IE any PORY can HQIbe closed.
311EM manually close its block valve.
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- c. Check other RCS vent paths -
- d. Check drain header-ISOLATED
- d. Close all fourloop drain header h10Vs.
- e. Checkletdown ISOLA 11?D
- e. Close letdown isolation valve LD htOV 2CY).
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JUN 3 1988 NUMBER EH REY. ISSUE /DAE FR.C.2 RESPONSE TO DEGRADED CORE COOLING Rev.2 STEP ACTION /EXPECIED RESPONSE RESPONSE NOT OBTAINED NOTEt NORMAL CONDITIONS FOR RUNNING RCPs ARE DESIRED, BUT RCPs SHOULD NOT BE TRIPPED IF NORMAL CONDITIONS CANNOT BE ESTABUSHED OR MAINTAINED.
4 CHECK RCP STATUS:
- a. Check at least one iJ RUNNING
- a. QQIQ Step 7.
- b. Check s systems for the
- b. Try to establish support systems for operatin cps -
the operating RCPs.
AV BII:
o Component cooling water system tn se m ce RCP seal water supp return systern in sem,1y and o
cc 5
CIIECK RVLIS INDICATION:
- a. Check plenum indication -
- a. E increasinJ.
GREATER 'IIIAN 15 %
111EN RETJRNIQ Step 1.
i E NOIincreasing, j
T11EN QQIQ Step 6.
- b. PEI1TRNIQ procedure and step in effect 6
CIIECK IF ONE RCP SHOULD BE STOPPED:
- n. Check all RCPs - RUNNING
- a. QQ IQ Step 8.
- b. Stop # 4 RCP 1
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- c. QQIQ step s i
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JUN 3 1988 NUMBER 1 TIM REV. ISSUE /DATE FR C.2 RESPONSE TO DEGRADED CORE COOLING Rev.2 STEP ACT10N/ EXPECTED RESPONSE RESPONSE NOT OBTAINED 7
CIECK CORE COOLING:
- a. Check RVLIS plenum indication -
- a. E increasing, GREATER THAN 15 %
THEN RETURNIQ Step 1.
E EDIincreasing.
THEN QQIQ Step 8.
- b. Check core exit thermocouples -
- b. E decreasing.
LESS THAN 700' F TIEN REIURNIQ Step 1.
E NOIdeereasin,
311EN QQIQ St 8.
- c. RETURNIQ procedure and step in effect r
1 CAUTION:
o MONITOR DWST LEVEL. START MAKEUP TO DWST BEFORE LEVEL DECREASES TO $4,000 GALLONS.
o A FAULTED OR RUPTURED SG SHOULD NOT BE USED IN SUBSEQUENT STEPS UNLESS NO INTACT SG IS A VAILABLE.
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8 CHECKIhTACT SG LEVELS:
- a. Check wide range levels -
- a. Increase total AUX feedwate!ifou GREATER THAN 63 %
to restore wide range level in at least (67 % FOR ADVERSE one SG to greater than 63 %
CONTAINMENT)
(67 % for adverse containment).
- b. Control AUX feedwater flow to i
maintain wide range levels between 63 % and 69 %
(67 % and 69 % for adverse 3
containment) l l
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JUN 312 bMGER mu REV. lSSUESATE FR.C.2 RESPONSE TO DEGRADED CORE COOLING Rev.2 STEP l ACTION /EXPECED RESPONSE RESPONSE NOT OBTAINED 9
DEPRESSURIZE ALL LYrACT SGs TO 200 PSIG:
- a. Maintain cooldown rate in RCS cold legs -
LESS '11AN 100* F/ HR
- b. Dump steam to the condenser
- b. Manually DR locally dump steam using one DR more of the following:
- 1. Atmos sheric vent valve.
- 2. Terry "urbine steam supply valves.
- 3. Hog Jet steam supply valves,
- c. Check SG pressure -
- c. RETURN IQ Step 8.
LESS THAN 200 PSIG 10 CHECK LPSI PUMPS RUNNING START PUMPS AS NECESS ARY.
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CAUT1ON:
SYMPTOMS FOR FR C.!, RESPONSE TO INADEQUATE CORE C00UNG, SHOULD BE CLOSELY MONITORED DURING SUBSEQUENT STEPS.
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l1 STOP ALL RCPs:
- a. Close all four seal water return MOVs
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JUN 3 1988 NUMBER
- ai d REY. ISSUESAE FR.C.2 RESPONSE TO DEGRADED CORE COOLING Rev.2 SEP ACTION /EXPECED RESPONSE RESPONSE NOT OBTAINED 12 DEPRESSURIZE ALLINTACT SGs TO 50 PSIO:
- a. Maintain cooldown rate in RCS cold lejis -
LESS 'llAN 100* F/ HR
- b. Dump steam to the condenser b.
Manually DR locally dump steam using one OR more of the following:
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- 1. Atmosaheric vent valve.
- 2. Terry Turbine steam supply valves.
- 3. Ilog Jet steam supply valves 13 VERIFY SI FLOW:
CONTINUE EFFORTS TO ESTABLISH SI FLOW.
o Check charging line flow TIEN RERTRNIQ STEP 12.
indicators INDICNTE FLOW 2
o Check IIPSI pump AMPS -
GREATER TIIAN 115 c,MPS 2
o Check LPSI puma AMPS -
GREATER THA 9 60 AMPS 14 ClECK CORE COOLING:
RETURNIQ STEP 12.
o Check RVLIS plenum indication -
GREATER *IllAN 15 %
o Check at least two hot leg t
tures -
S THAN 350' F 15 QQIQ E 1, LOSS OF REACTOR OR SECONDARY COOLAhT, STEP 12 END l
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