ML20204H734

Rev 6 to Emergency Operating Procedure EOP 3.1-8, Complete Loss of Condenser Vacuum

ML20204H734
Person / Time
Site:	Millstone, Haddam Neck, 05000000
Issue date:	05/12/1987
From:	CONNECTICUT YANKEE ATOMIC POWER CO.
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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
EOP-3.1-8, NUDOCS 8810240465
Download: ML20204H734 (2)

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E0P 301-8 Rev.6(MAJOR)

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MAY I 21987 Connecticut Yankee

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Emer ncy Operating Procedure c

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I COMPLETE LOSS OF CONDENSER VACUUM glha,tb. %

'a pe v na up 1.0 DISCUSSION 1.1 Although protection of the secondary plant equipment is of concern.

prime attention must be directed to providing for adequate heat removal from the reactor coolant system.

1.2 A complete loss of esin condenser vacuum, is defined as the condenser vacuum at or below the turbine low vacuum trip of (21.5" Hg) 2.0 SYMPTOMS Decreasing condenser vacuum.i 7.1 2.2 Turbine and reactor trip.

2.3 Absence or loss of steam dump after reactor trip caused by low vacuum blocking of actuation signal.

2.4 Possible actuation of pressurizer power operated relief valves and code safey valves.

2.5 Actuation of steam generator safety valves.

3.0 AUTOMATIC ACTIONS 3.1 Turbine and reactor trip on low vacuum at 21.5 in. Hg.

If power less than 101, reactor will not trip.

3.2 Actuation of steam generator safety valves at 985 psig.

4.0 IM EDIATE OPERATOR ACTION 4.1 Perform imediate actions contained in E-0, Reactor Trip or Safety Injection, if not done, rb 9810240465 881007 Page 1 of 2 PDR ADOCK 05000213 P

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E0P 3.1-8 Rev.6(MAJOR)

E0P2

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5.0 SU8 SEQUENT OPERATOR ACTION l

ACTION / EXPECTED RESPONSE

_RESPON5E NOT 05TAIMED l

T 5.1 Verify ave is reduced to 5.1 Open steam supply to hog jets approximately 535"F by OR atmospheric vent OR aux.

Steam Dump.

Teed pumps to controTT,y,.

5.2 Verify Hotwell level 5.2 Open hotwell makeup valve greater than 501.

CD-MOV-10.

IF hotwell level less than 40 E THEN shift suction on "A" condensate pump to DWST and shut down one feed pump and "B" condensate pump.

5.3 Verify feed flow to SG's 5.3 Open FW bypass valve to each greater than 320 GPM SG using main OR aux, feed unti'i WR level in one SG is pumps.

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greater than 635.

5.4 ~ Check DWST level greater 5.4 Start takeup to DWST from PWST than 54,000 gallons.

OR RPWST Oft WT unit.

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NOTE: The combined storage capacity of the two hotwells provides a

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2 3/4 minute supply of',feedwater at full flow.

E 5.5 Operate main or aux feed pumps to provide feed

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flow to SGs.

5.6 Return to procedure end step in effect.

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