ML20237H671
| ML20237H671 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 02/17/1987 |
| From: | Strickland G, Terpstra G TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20237H133 | List:
|
| References | |
| FR-P.2, NUDOCS 8708170307 | |
| Download: ML20237H671 (6) | |
Text
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- TENNESSEE VALLEY AUTHORITY _
i
-SEQUOYAH NUCLEAR PLANT . l
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[ FUNCTION RESTORATION GUIDELINES i FR-P.2 RESPONSE TO COLD OVERPRESSURE CONDITION . 1 4 1 i Revision 1
- k G. Stric141and j PREPARED BY: __
RESPONSIBLE SECTION: Operations REVISED BY: Gary L. Terpstra ; 11/7 SUBMITTED BY: A
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$eppon'sibleSect4onSupervisor ]
PORC REVIEW DATE: FEB 1 J,1987l , * ! APPROVED BY: Plant Manager
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DATE APPROVED: FEB i 7 fa87 L 1 for revision (include all Instruction Change Form Nos.): 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 _ fD A PD P c_______._._ __ _ __ J
,h 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 0737 s' Revised graph presentation due to ((g g 7 ~ -gg7 report LO2861082 897 to make use of *
'l 4 better human engineering principles.
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SQNP FR-P . 2 Unit 1 or 2 Page 1 of 3 Rev. O RESPONSE TO COLD OVERPRESSURE CONDITION - i . l A. PURPOSE This guideline provides actions to respond to a limited overcooling condition or to an overpressure condition at low temperature 1
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B. SYMPTOMS Refer to Status Tree C. TRANSITION FROM OTHER INSTRUCTIONS Status Tree g
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, SQNP FR-P . 2 Unit 1 or 2 Page 2 of 3 Rev. O C -
RESPONSE TO COLD OVERPRESSURE CONDITION S_TE_P_ ___ ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 1 Check T-Cold E T-cold decreasing in an uncontroHed manner,
- a. T-cold - STABLE AND THEN verify steam dumps CONTROLpED _.
AND S/G PORVs closed IF uncontrolled cooldown continues , THEN close MSIVs AND MSIV bypass valves 2 Check S/G Press , E S/G press low and decreasing in an
- a. Press in all S/Gs within uncontrolled manner, 100 psi of each other THEN isolate faulted S/G:
- b. AU S/G press -
- ,.,C
- STABLE OR INCREASING Isolate AFW and main FW Close MSIV and bypass valve Align turbine-driven AFW steam to intact S/G E all 4 S/Gs faulted, THEN reduce AFW flow to 25 gpm .to e ich S/G AND do NOT impl . cent FR-H.1 3 Minimize RCS Cooldown
- a. Control AFW and S/G press -
as required
- b. Control RHR if in service L - - - _ _ _ _ _ _ _ - - - . - - _ _
, .'- SQNP ! FR-P.2 Unit 1 or 2 l Page 3 of 3 Rev. O 'C 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 to isolated instruction in effect. -
- b. SI Pumps 'have previously been stopped 5 Check RCS Press
- a. Maintain RCS press w',;hin normal cooldown curve for ,,
100 F/hr i
- 1) Decrease RCS press 1) I_F normal pzr sprays using normal pzr NOT available, r
sprays THEN use aux spray
,A(r
- IF aux spray NOT available, THEN use one pzr PORV 6 Determine If Additional Ce Idown Restrictions Required
- a. IF any T-cold cooldown a. IF all T-cold cooldown exceeded 100 F in any less than 100 F in any 1 hour, I hour, THEN: THEN rio additional cooldown restrictions
- 1) Maintain RCS press required . Maintain RCS and temp within limits temp and press within of Figure 1 normal cooldown curve
- 2) Maintain all T-cold cooldown less than 100 F in any 1 hour 7 Return To Instruction In Effect
- END -
1
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SQNP FR-P.2 Unit 1 or 2
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