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i-SEQUOYAH NUCLEAR PLANT . |

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FUNCTION RESTORATION GUIDELINESi

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RESPONSE TO COLD OVERPRESSURE CONDITION .

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Revision 1

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PREPARED BY: G. Stric141and j"__

RESPONSIBLE SECTION: Operations"

REVISED BY: Gary L. Terpstra ;

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SUBMITTED BY: 11/7 A

'( $eppon'sibleSect4onSupervisor ]'

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PORC REVIEW DATE: FEB 1 J,1987| , * !APPROVED BY:

Plant Manager~

DATE APPROVED: FEB i 7 fa87

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for revision (include all Instruction Change Form Nos.):1

Revised graph presentation due to report LO2861082 897 to make

use of better human engineering principles.,.

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The last page of this instruction is number: 4 i

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SEQUOYA!! NUCLEAR PLANT ;,_,,,

PLANT INSTRUCTION REVISION LOG ).

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FUNCTION RESTORATION GUIDELINES FR-P.2..

REVISION Date Pages REASON FOR REVISION (INCLUDE COMMIT-I LEVEL Approved Affected 'MENTS AND ALL ICT FORM NUMBERS)New instruction written per commitment

0 08/21/85 All to NUREG 0737Revised graph presentation due to

s' report LO2861082 897 to make use of *

{{g g 7 ~ gg7 better human engineering principles.'l 4-,

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' FR-P . 2 Unit 1 or 2- '

Page 1 of 3Rev. O

RESPONSE TO COLD OVERPRESSURE CONDITION -

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A. PURPOSE

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This guideline provides actions to respond to a limited overcooling conditionor to an overpressure condition at low temperature

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B. SYMPTOMS'~

Refer to Status Tree

C. TRANSITION FROM OTHER INSTRUCTIONS

Status Tree

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FR-P . 2 Unit 1 or 2Page 2 of 3Rev. O

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RESPONSE TO COLD OVERPRESSURE CONDITION-

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S_TE_P_ ___ ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED,.

1 Check T-Cold E T-cold decreasing inan uncontroHed manner,

a. T-cold - STABLE AND THEN verify steam dumpsCONTROLpED _. AND S/G PORVs closed

IF uncontrolled cooldowncontinues ,THEN close MSIVs ANDMSIV bypass valves

2 Check S/G Press E S/G press low and,

decreasing in ana. Press in all S/Gs within uncontrolled manner,

100 psi of each other THEN isolatefaulted S/G:

b. AU S/G press -

C STABLE OR INCREASING Isolate AFW and*

; ,., main FW

Close MSIV andbypass valve

Align turbine-drivenAFW steam tointact S/G

E all 4 S/Gs faulted,THEN reduce AFW flowto 25 gpm .to e ich S/GAND do NOT impl . centFR-H.1

3 Minimize RCS Cooldown_

a. Control AFW and S/G press -

as required

b. Control RHR if in service

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! FR-P.2 Unit 1 or 2'

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RESPONSE TO COLD OVERPRESSURE CONDITION.

GTEP ACTION / EXPECTED RESPONSE _ RESPONSE NOT OBT INED

4 Check If SI Has Been Terminated IF SI has NOT been terminated,THEN do NOT continue with

a. BIT has previously been this instruction. Return toisolated instruction in effect. -

b. SI Pumps 'have previouslybeen stopped

5 Check RCS Press'

a. Maintain RCS press w',;hinnormal cooldown curve for ,,

100 F/hri

1) Decrease RCS press 1) I_F normal pzr spraysusing normal pzr NOT available,

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,A(rsprays THEN use aux spray

* IF aux sprayNOT available,THEN use one pzrPORV

6 Determine If Additional Ce IdownRestrictions Required

a. IF any T-cold cooldown a. IF all T-cold cooldownexceeded 100 F in any less than 100 F in any1 hour, I hour,THEN: THEN rio additional

cooldown restrictions1) Maintain RCS press required . Maintain RCS

and temp within limits temp and press withinof Figure 1 normal cooldown curve

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2) Maintain all T-coldcooldown less than100 F in any 1 hour

7 Return To Instruction In Effect.-

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SQNP,

FR-P.2 Unit 1 or 2.*

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Figure 1 - FR-P.2 - Post Sock Cooldown Limit

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