ML20204J965

Rev 1 to Emergency Operating Procedure FR-H.2, Response to Steam Generator Overpressure

ML20204J965
Person / Time
Site:	Millstone, Haddam Neck, 05000000
Issue date:	06/03/1988
From:	CONNECTICUT YANKEE ATOMIC POWER CO.
To:
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ML20204H467	List: A07413, Forwards Specific Emergency Operating Procedures for Use During Incident Response Ctr Activation ML20204H704 ML20204H734 ML20204H868 ML20204H928 ML20204H963 ML20204J027 ML20204J039 ML20204J092 ML20204J109 ML20204J115 ML20204J120 ML20204J128 ML20204J133 ML20204J139 ML20204J147 ML20204J497 ML20204J543 ML20204J565 ML20204J627 ML20204J633 ML20204J638 ML20204J642 ML20204J659 ML20204J669 ML20204J685 ML20204J707 ML20204J733 ML20204J739 ML20204J746 ML20204J767 ML20204J781 ML20204J786 ML20204J814 ML20204J824 ML20204J849 ML20204J853 ML20204J865 ML20204J878 ML20204J902 ML20204J914 ML20204J920 ML20204J939 ML20204J947 ML20204J954 ML20204J958 ML20204J965 ML20204J975 ML20204J982 ML20204J994 ... further results
References
FR-H.2, NUDOCS 8810250303
Download: ML20204J965 (3)

Text

JW1 3 1988 NUMBER TTIM REV. ISSUE /DAE FR.H.2 RESPONSE TO STEAM GENERATOR Rev. 1 OVERPRESSURE A.

PURPOSE This procedure arovides actions for an overpressure condition affecting any steam generator where pressure sat increased above the highest steamline safety valve setpoint.

B.

SYMPTOMS OR ENTRY CONDITIONS Dis procedure is entered from F 0.3, HEAT SINK Critical Safety Function Status Tree on a YELLOW condition.

t Page 1 of 3

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JUN 3 1988 NUMBER TTTLE REV. ISSUE /DAR FR.H.2 RESPONSE TO STEAM GENERATOR Rev.1 OVERPRESSURE

(

SEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE:

THROUGHOUT THIS PROCEDURE, "AFFECTED" REFERS TO ANY SG IN WHICH PRESSURE IS GREATER THAN 1034 PSIG.

1 IDENTIFY AFFECTED SG(s):

a. Check SG pressures

a. RETURNIQ procedure and step in ANY GREATER T AN 1034 PSIG effect.

2 VERIFY FEEDWATTIR ISOLATED TO AFFECTED SG(s):

a. Check main feedwater flow contml

a. Manually close feedwater fksv valves - CLOSED contml valves.

'- Check feedline bypass AOVs -

b. Manually close feedline bypass AOVs.

CLOSED

c. Check feedline isolation MOVs -

c. Manually close feedline isolation CLOSED MOVs.

3 CHECK AFFECTED SG(s) WIDE O_QIQ FR H.3, RANGE LEVEL LESS THAN 72 %

RESPONSE TO SHAM GENERATOR (68 % FOR ADVERSE HIGH LEVEL, STEP 1.

CONTAINMENT) r CAUTION:

IF AFFECTED SG(s) W'OE RANGE LEVEL INCREASES TO GREATER THAN 72 % (68 % FOX DVERSE CONTAINMENT), STEAM SHOULD NOT DE RELEASED FROM THE AFFECTED SG(s).

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l 4

TRY TO DUMP SEAM FROM QQIQ STEP 6.

AFFECTED SG(s):

o Use atmospheric vent valve 2

o Use steam supply to tarbine driven AFW pumps M

o Use main steamline isolation valve bypass valves Page 2 of 3

3 JUN 3 1983 NUMBER TTIll REV. ISSUE /DATE FR H.2 RESPONSE TO STEAM GENERATOR Rev.1 OVERPRESSURE STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAlhTD 5

CHECK AFFECTED SG(s) PRESSURE:

a. Check pressure (s)- DECREASING

a. QQIQ Step 6.

b. Check pressure (s)-

b. RETURN IQ Step 3.

LESS THAN 1034 PSIG

c. Control steam release to maintain affected SG(s)less than 1034 PSIG

d. RETURNIQ procedure and step in effect r

7 CAUTIONt AFW FLOW SHOULD REhfAINISOLATED TO AFFECTED SG(s)

UNTIL A STEAbi RELEASE PATH IS ESTABUSHED.

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6 CHECK AFW FLOW ISOLARID TO AFFECTED SG(s) 7 CHECK RCS HOT LEG COOLDOWN RCS TO LESS TEhiPERARJRES -

1EAN 535' F(530' F FOR ADVERSE LESS TIIAN 535 F CONTAINMENT) BY DUhtPING (530' F FOR ADVERSE STEAM FROh! EiE UNAFFECED CONTAINMENT)

SG(s).

8 CONTINUE ATTEMPTS TO MANUAL 1Y DE LOCALLY DUMP STEAM FROM AFFECTED SG(s):

I o Use atmospheric vent valve 2

o Use steam supply to turbine driven AFW pumps 2

o Use main steamline isolation valve bypass valves and flog Jet steam supply valves 9

RETTJRNIQ procedure and step ineffect END Page 3 of 3