ML20237H671

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Rev 1 to Function Restoration Guidelines FR-P.2, Response to Cold Overpressure Condition
ML20237H671
Person / Time
Site: Sequoyah  Tennessee Valley Authority icon.png
Issue date: 02/17/1987
From: Strickland G, Terpstra G
TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20237H133 List: ... further results
References
FR-P.2, NUDOCS 8708170307
Download: ML20237H671 (6)
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{{#Wiki_filter:_,_ s TENNESSEE VALLEY AUTHORITY i -SEQUOYAH NUCLEAR PLANT l [ ~ FUNCTION RESTORATION GUIDELINES i FR-P.2 RESPONSE TO COLD OVERPRESSURE CONDITION 1 4 1 i Revision 1 k PREPARED BY: G. Stric141and j RESPONSIBLE SECTION: Operations REVISED BY: Gary L. Terpstra SUBMITTED BY: 11/7 A '( $eppon'sibleSect4onSupervisor ] PORC REVIEW DATE: FEB 1 J,1987l,

  • APPROVED BY:

Plant Manager ~ DATE APPROVED: FEB i 7 fa87 L 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. ~ The last page of this instruction is number: 4 i fD A PD P c_______._._ J

,h SEQUOYA!! NUCLEAR PLANT PLANT INSTRUCTION REVISION LOG ) 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 Revised graph presentation due to s' report LO2861082 897 to make use of ((g g 7 ~ gg7 better human engineering principles. 'l 4 P W* .4 L L L L l 1 0268L/ldw L Y iL-L L_________.

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 B. SYMPTOMS '~ Refer to Status Tree C. TRANSITION FROM OTHER INSTRUCTIONS Status Tree g i l + e l ) 1 ~~ m

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

,A(r sprays THEN use aux spray 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 -.

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