ML20204J039

Rev 4 to Emergency Operating Procedure EOP 3.1-28, Turbine Overspeed

ML20204J039
Person / Time
Site:	Millstone, Haddam Neck, 05000000
Issue date:	08/23/1988
From:	CONNECTICUT YANKEE ATOMIC POWER CO.
To:
Shared Package
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-3.1-28, NUDOCS 8810240525
Download: ML20204J039 (4)

Text

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CONNECTICUT YANKEE ATOMIC POWER CO.

(

CY PROCEDURE COVER SHEET AUG 231998 PROCEDURE NUMBER TITLE REY.NO.

EOP 3.1-28 Turbine Overspeed 4 Major cacuca P. Rainha DATE 6/23/88 l DEPT. Ops l TECHNICAL REVIEW l OPERATIONS - -

I HEALTH PHYSICS ,

i ENGINEERING CHEMISTRY SECURITY

[ REACTOR ENGR.

MAINTENANCE STORES

[ INST. & CONTROL CA

[ ADMIN. RECORDS ,

U( ) (P20c WTOE ) /2 J G

(( ] [ ]

DEPARTMENT HEAD REVIEW I

COMPLETE / B:ENNIAL REVIEW 7 hYES NO PORC REVIEW REQUIRED? hYES NO l MAJOR REVISON? hYES NO ENVIROfAENTAL IMPACT? YES[NO A CHANGE TO INTENT 7 YES NO WRITTEN SAFETY EVALUATON ATTACHED? YES[ N/A SAFETY EVALUATCN REQUIRED? YEShNO UNREVIEVED SAFETY OUEST10N? UYEShNO APPROVAL DATE SU ')

l DEPA T 1%NT%EAD

\ \ % 1'Ut'8T _

p,h/w I DATE PROCEDURE EF F ECTIVE DATE REQUIRES UCE.NSED OPERATOR l

[ PORC M EEThiG NO.

-( b h k YES % NO [

I 017 ACP 1.2 6.5. Attachment 8.1 9010240525 801007 ADOCK 050 3 gDR

AUG 231988 EOP 3.128 Rev.4 Major

( Connecticut Yankee Emergency Operating Procedure EOP 3.1-28 TURBINE OVERSPEED 1.0 DISCUSSION 1.1 Turbine overspeed can cause turbine damage if it is not reduced. It can result from any of the followmg causes:

1.1.1 Malfunction of turbine control valves during turbine startup.

1.1.2 A loss of generator load.

1.1.3 Failure of turbine stop and control valves to close following a turbine trip.

1.1.4 Malfunction oflow pressure steam dump system following a turbine trip.

2.0 SYMIrTOMS 2.1 "Turbine Overspeed Trip" alarm.

2.2 Increasing indication on turbine speed recorder.

2.3 Increasing indication on turbine speed indicator.

2.4 Loss of load trip from 86P and / or 86BU relays.

2.5 No closed indication on turbine stop and control valves following a turbine trip.

3.0 AUTOMATIC ACTIONS 3.1 Turbine trip.

3.2 Reactor trip if reactor powa level is above P . 7 (10 %).

3.3 Low Pressure Steam Dump actuation.

~

l Page 1 of 3 l-

AUG 2 31988 EOP 3.1-28  :

Rev.4 Major  !

( 4.0 IMMEDIATE ACTIONS  !

1H2 AcnONEXPECTED RESPONSE RESPONSE NOT OBTAINED (

l 4.1 Perform immediate actions in E-0, i REACTOR TRIP OR SAFETY INECTION  ;

l 5.0 SUBSEQUEST ACTIONS  :

5.1 Check turbine speed indicator- Perform the following: l LESS ' IRAN 2300 RPM i

a. Close all four main steamline trip valves,

b. Open pressure controlled steam dump valves to depressurize main steamlines.

5.2 Check turbine stop and control Perform the following:

valves CLOSED

a. Place turbine stop valve control switches in the trip position.

b. Run test motors on any open control valve (s) to the closed position.

5.3 Check turbine speed - E turbine speed is approaching 2300 RPM, STABLE DE DECREASING 'I1EN close all four main steamline trip valves ASI2 open pressure controlled steam dump valves to depressusize main steamlines.

5.4 RE'IURNIQ procedure and step in effect END 1

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AUG 2 31988 EOP 3.138  !

Rev.4 Major j i

( 6.0 FOOTNOTES

{

None i I

7.0

SUMMARY

OF CHANGES Step # Change Reason 4.0 Format changed To be consistent with ERP format.

5.0 Format changed To be consistent with ERP format.

I, t

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