this guideline provides actions to respond to a limited
TRANSCRIPT
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!- TENNESSEE VALLEY AUTHORITY _
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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FR-P.2 Unit 1 or 2.*
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Figure 1 - FR-P.2 - Post Sock Cooldown Limit
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