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

- -. - -

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:

L i

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

~

=

8708170385 070011 PDR ADOCK O y7 P

J -1

SEQUOYAH NUCLEAR PLANT PLANT INSTRUCTION REVISION LOG 1

EMERGENCY INSTRUCTION ES-1.2 Date Pages REASON FOR REVISION (INCLUDE COMMIT-Approved lAffected REVISION MENTS AND ALL ICF FORM NUMBERS)

LEVEL 0

10/04/84 ALL

'{

Revised to add transitions from other instructions, to change stoke time of I'

1 08/21/85 1,2,5,7 FCV-72-23 & 20 delete FCV-62-98 & 99.

Revised in accordance with ICF 85-1500, I

Revised to correct containment sump 2

01/28/86 6

PORC reviewed and approved 12/02/85.

level setpoint to 11.25 percent since-Instrument Maintenance changed bistable 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 l

C.

TRANSITION FROM OTHER INSTRUCTIONS i

1.

E-1, Loss Of Reactor Or Secondary Coolant 2.

ES-1.1, Post LOCA Cooldown l

3.

Foldout 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

g.

Heat Exchangers, Pnl M-27B

)

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

(

e.

CCS to unaffected unit

, may have to be reduced e

.r 2

Check RHR System Ensure at least one RHR Pump running a.

Ensure RHR Pumps

-RUNNING k

)

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 WHEN RWST $ 29%-

a.

. 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 I'

corresponding RHR b) FCV-63-73 (40 sec)

Pump AND Cntmt i

Spray Pump I

2) RWST - RHR ' suction.

valves - CLOSING f

a). FCV-74-3 ;

(2 min)

.s b) FCV-74-21 (2 min) 4.

Complete Switchover Per Appendix A 5

Verify Switchover Per Appendix B 6

' Return To Instruction In Effect L

L

-END-C EMERPR/H 3{

anc

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 be stopped p

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

-- ~

l STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 1

CLOSE SI Pump Miniflow a.

FCV-63-4 (10 sec)

~

~

b.

FCV-63-175 (10 see)

~

FCV-63-3 (10 sec) c.

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 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)

L

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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.

~

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)

?

~ '

A

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 I(

1 c.

CLOSE cntmt spray suction

.-e k

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]

SQNP E S - 1. 2 Unit 1 or 2 Appendix A Page 5 of 5 Rev. 0

~

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)

)

I 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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