ML20237H852

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Rev 3 to Emergency Instruction ES-1.2, Transfer to RHR Containment Sump
ML20237H852
Person / Time
Site: Sequoyah  Tennessee Valley Authority icon.png
Issue date: 04/29/1987
From: Strickland G, Wilkes J
TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20237H133 List: ... further results
References
ES-1.2, NUDOCS 8708170385
Download: ML20237H852 (14)
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Text

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TENNESSEE VALLEY AUTHORITY SEQUOYAH NUCLEAR PLANT ,

EMERGENCY INSTRUCTION .-

ES-1.2 ,

. TRANSFER'TO RHR CONTAINMENT SUMP .

s

.. Revision 3 .

I PREPARED BY: G. StricM and RESPONSIBLE SECTION: Operations S E Y: -

, u-Res nsible Section Supsrvisor g

PORC REVIEW DATE: APR 2 91981 APPROVED BY:

Plant Manager  !

DATE APPROVED:

i L i l

Reason for revision (include all Instruction Change Form Nos.):

Revised to correct containment sump level setpoint to 11.25 percent since Instrument Maintenance changed bistable setpoint.

l.

The last page of this instruction is number: 12

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8708170385 070011 PDR P

ADOCK O y7 J -1

SEQUOYAH NUCLEAR PLANT PLANT INSTRUCTION REVISION LOG -

1 .

' ES-1.2 EMERGENCY INSTRUCTION REVISION Date Pages REASON FOR REVISION (INCLUDE COMMIT-LEVEL Approved lAffected MENTS AND ALL ICF FORM NUMBERS) 0 10/04/84 ALL

'{ '

Revised to add transitions from other I'

instructions, to change stoke time of 1 08/21/85 1,2,5,7 FCV-72-23 & 20 delete FCV-62-98 & 99.

Revised in accordance with ICF 85-1500, 01/28/86 6 PORC reviewed and approved 12/02/85.

I 2 Revised to correct containment sump level setpoint to 11.25 percent since-Instrument Maintenance changed bistable 3 APR 2 9 1987 3 seepoine,_

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SQNP l J , E S- 1. 2 Unit 1 or 2 Page 1 of 3 Rev. 1 i

TRANSFER TO RHR CONTAINMENT SUMP A. PURPOSE l This guideline provides the necessary instructions for transferring ECCS and containment spray suction to the containment sump.

l B. SYMPTOMS

1. RWST level below 29%

l C. TRANSITION FROM OTHER INSTRUCTIONS l

i

1. E-1, Loss Of Reactor Or Secondary Coolant
2. ES-1.1, Post LOCA Cooldown l 3. Foldout

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page 1.s t 4. FR-C.1, Response To Inadequate Core Cooling A 5. FR-C.2, Response To Saturated Core Cooling 9 O he e l

EQNP

. , ES-1. 2 Unit 1 or 2 Page 2 of 3 Rev. 1 1

TRANSFER TO RHR CONTAINMENT SUMP STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED '

1 Estabush CCS Tc RHR i Heat Exchangers, Pnl M-27B

g. -

)

a. Monitor CCS surge tank level
b. Open FCV-70-156 -

(60 sec)

c. Open FCV-70-153 (60 sec) -
d. Verify CCS flow on FI-70-155 and 158

.r e ( e. CCS to unaffected unit

, may have to be reduced 2 Check RHR System Ensure at least one RHR Pump running

a. Ensure RHR Pumps

-RUNNING k

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SQNP ES-1. 2 Unit 1 or 2 Page 3 of 3

' Revision 3 TRANSFER TO' RHR CONTAINMENT SUMP STEP ' ACTION / EXPECTED RESPONSE RESPONSE NOT OBTA NED 3 Verify Automatic Switchover

a. WHEN RWST $ 29%-

. AND cntmt sump >_11.25%, ,

THEN:

4

1) Cntmt sump valves - 1) IF_ a entmt sump OPENING valve can NOT be -

fully ' opened ,

a) FCV-63-72 (40 sec) THEN stop the corresponding RHR I' b) FCV-63-73 (40 sec) i Pump AND Cntmt Spray Pump .

I 2) RWST - RHR ' suction . . -

valves - CLOSING f

a) . FCV-74-3 ; (2 min)

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b) FCV-74-21 (2 min)

4. Complete Switchover Per Appendix A 5 Verify Switchover Per Appendix B 6 ' Return To Instruction In Effect '

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-END-C 3 EMERPR/H anc

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, SQNP ES- 1. 2 Unit 1 or 2 Appendix A Page 1 of 5 l

- .. Rev. O.  !

(-

TRANSFER TO RHR CONTAINMENT SUMP i STEP _ ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED ,

C AUTION: If the RWST reaches 0% level, then immediately stop any pumps taking suction from the RWST. Complete ,

the switchover steps listed, then restart required pumps C AUTION : If offsite power is lost after transfer to entmt sump, then immediately place CCPs in PULL TO LOCK.

Manually restart RHR Pumps prior to restarting CCPs.

Manually restart SI Pumps CAUTION: ECCS flow to RCS must be maintained at all times CAUTION: If the RCS pressure is greater than the discharge i , pressure of the SI Pumps, then the SI Pumps should p ,,, be stopped -

Note: Perform all actions quickly in a precise, orderly sequence Note: Do not interrupt changeover operation until all actions are completed Note: If a valve fails to respond or to complete its demanded operation, postpone any corrective action until the subsequent steps are performed except as noted Note: Loss of one complete train of power will allow the other train to be swapped. Parallel valves rcquired to be closed will require one valve to be closed locally Note : The times provided at the end of subsequent steps are normal times for the valve to trm el full stroke l

Note: Each valve handswitch requiring operation is identified

[( by a number representing each sequential step 4

f-. SQNP

. . ES-1.2 Unit 1 or 2 Appendix A Page 2 of 5 6 Rev. 1 - - - -

._ L.

TRANSFER TO RHR CONTAINMENT SUMP ,

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l STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED -

1 CLOSE SI Pump Miniflow

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a. FCV-63-4 (10 sec)
b. FCV-63-175 (10 see)

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c. FCV-63-3 (10 sec) 2 CLOSE RHR Crosstie
a. FCV-74-33 (10 sec)
b. FCV-74-35

( (10 sec) __ ,

f 3 OPEN Parallel Valves In CCP And A SI' Pump Suction

a. FCV-63-6 (10 sec)
b. FCV-63-7 (10 sec) 4 - OPEN RHR Discharge To CCP FCV-63-8 and 11 interlocked I And SI Pump Suction with FCV-63-3, 4, and 175 )

l (FCV-63-3, 4, and 175 must --i

[ a. FCV-63-8 (10 sec) be closed) i i

b. FCV-63-11 (10 sec) -

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SQNP

. ES-1. 2 Unit 1 or 2 l Appendix A

( Page 3 of 5 Rev. 2 j

1

) TRANSFER TO RHR CONTAINMENT SUMP -

j STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED "

) . CAUTION: Do not continue until all valves in steps 1 through 4  !

are verified in their correct position. AFTER the  ;

valves are verified in their correct position, i

THEN monitor the ECCS pumps for continuous flow when closing the RWST suction valves.

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Note: All ECCS pumps are now aligned with suction flow from the entmt sump 5 Reset SI 6 CLOSE CCP Suction From EE

% $ a. , FCV-62-135 (10 see)

,Y b. FCV-62-136 (10 sec) 7 g.OSE RHR Suction From RWST )

a. Restore power to FCV-63-1, Rx MOV Bd Al-A
b. CLOSE FCV-63-1 (15 see) 8 CLOSE SI Pump Suction From ' ,

RWST

a. FCV-63-5 (10 see)

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  • SQNP ES-1. 2 Unit 1 or 2 i Appendix A Page 4 of 5 Rev. 1 TRANSFER TO RHR CONTAINMENT SUMP STEP dCTION/ EXPECTED RESPONSE, RESPONSE NOT OBTAINED '

Note: After going into the recirculation mode, the Cntmt Spray Pumps will continue using water from the RWST. Upon reaching the '

RWST level of 8%, realign the Cntmt Spray Pump suction to the entmt sump. If sufficient time exists to verify ECCS alignment per Appendix B prior to the RWST reaching 8%, then go to Appendix B.

9 Align Cntmt Spray Suction To Cntmt Sump

a. RWST level < 8%
b. STOP and PULL TO LOCK both Cntat Spray Pumps

.-e I(k c. CLOSE cntmt spray suction 1

1) FCV-72-22 (15 sec)
2) FCV-72-21 (15 see)
d. OPEN cntmt spray suction from entmt sump X 1) FCV-72-23 (25 sec) 1) Interlocked with FCV-72-22 and FCV-74-3 fully closed A 2) FCV-72-20 (25 sec) 2) Interlocked with FCV-72-21 and FCV-74-21 fully  ;

closed c]

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, , SQNP E S - 1. 2 Unit 1 or 2 Appendix A

. - Page 5 of 5 Rev. 0

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TRANSFER TO RHR CONTAINMENT SUMP STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED ,.

i 10 Establish ERCW To Cntmt Spray Heat Exchangers _

a. Check SOI-67 for degraded j ERCW alignment l 1
b. OPEN FCV-67-125 (1 min) )

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c. OPEN FCV-67126 (1 min)
d. OPEN FCV-67-123 (1 min) ' l I
e. OPEN FCV-67-124 (1 min)
f. Verify flow on FI-67-136 and 122 i l

C 11 Verify Cntmt Spray Suction Valves - OPEN 1 l

a. Train A a. IF train A suction valves can NOT be opened,
1) FCV-63-72 THEN do not restart Cntmt Spray Pump A-A i
2) FCV-72-23 i 1
b. Train B b. E train B suction valves can NOT be opened,
1) FCV-63-73 THEN 'do not restart i Cntmt Spray Pump B-B  ;
2) FCV-72-20 12 Start Cntmt Spray Pumps
a. Verify entmt spray flow i

> 4500 gpm

1) FI-72-34
2) FI-72-13

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