ML20040A972

Emergency Operating Procedure OP-20,Revision 1, Excessive RCS Leakage. Related Correspondence

ML20040A972
Person / Time
Site:	Diablo Canyon
Issue date:	04/11/1980
From:	PACIFIC GAS & ELECTRIC CO.
To:
Shared Package
ML20040A967	List: ML20040A966 ML20040A968 ML20040A969 ML20040A970 ML20040A971 ML20040A972 ML20040A973 ML20040A974 ML20040A975
References
NUDOCS 8201230021
Download: ML20040A972 (4)

Text

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netsrto connsMB PACIFIC GAS A!!D ELECTRIC COMPANY h' DEPARTi'EtiT OF itUCLEAR PLANT OPERATI0fts DIABLO CANYON POWER PLANT UrtIT NOS.1 AND 2 EMEPGENCY OPERATING PROCEDURE N0. OP-20 TITLE: EXCESSIVE REACTOR C00LAt1T SYSTEM LEAKAGE SCOPE This procedure outlines the steps to be taken in the event of reactor Thiscoolant system leakage in excess of the Technical Specifications limits.

l procedure is also limited by the upper liait of The basic maintaining Technical pressurizerlimits Specifications level by the use of one charging pump.

are no pressure boundary leakage,10 GPM identified leakage and 1 GPM unidenti-fied leakage. If leakage is detecced the primary goal should be to eithe- I isolate the leak or identify it.

SYMPTOMS

1. Containment high activity alam (PK11-21).

2. Containment high humidity alarm (PK01-16).

3. Containment sump high level alarm (PKlS-01). l

4. Increase in volume cor. trol tank makeup.

5. Charging pump speed or i" tow increase.

6. High temperature on pres;urizer power relief or safety valve discharge.

7. Increased level, tem; era ure a-d/or pressure in pressurizer relief tank.

AUT0fGTi ACTIO:;S ,

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1. Possible char;ir.g pum; s:eet :r flow increase.

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2. Possible process moMt:r isoli; ion actions:

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a. Close compcnent ccalir.; water surge tank vent valve. d

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b. Possible ste:m generater blowdown isolation. i{ 0.'.~

- 3 Pcssible PRT vent header isolation at 10 psig in PRT.

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i' l 4 REVISION I DATE 4/11/80 PACE 1 0F ,

APPRLVAL DATE LANT SUPERINTENDENT 8201230021 820114 POR ADOCK 05000275 J PDR L __-_

m-EMERGENCY OPERATING PROCEDURE NO. OP-20

)(' TTTLE: EXCES$fVE REACTOR COOLANT SYSTEM LEAKAGE i

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OBJECTIVE l

1. Iuentify the source and ratt. of leakage.

2. Isolate the leak, if possible.

3. -Take actions as necessary to comply with Technical Specificatior.s requirements.

IMMEDIATE OPERATOR ACTIONS ACTIONS COMMENTS

1. Verify pressurizer level and pressure being maintained.

2. Start another charging pump if -

necessa ry.

3. Check pressurizer safety valve and relief valve discharge temperatures.

SUBSE00ENT OPERATOR ACTIONS  !

ACTIONS COMMENTS

1. Attempt to determine the cagnitude Refer to STP R-10.

of the leak.

2. Check the centainment temps-a:ars and humidity acnitoring panei a-d a- srp to determine the area .of tha leak. .

3. Checl. possible sources of 16ala;s outside of contair. cant.

a. Primary sampling syster.

b. Component cooling water surge Refer to Emergency Procedure OP-ll.

tank level.

c. Increased activity 'n steam Refer to Emergency Procedude OP-33.

generator bicwdown. '

d. Check all relief valves that discharge into the pressurizer relief tank. ,

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EMERGEI'CY OPERATING PROCEDURE ii0. CP-E0 TITLE: EXCESSIVE REAC7rR CCOLANT SYSTEM LEAK'GE ACTIONS CO..ME NTS

e. Check for unusual inflow to the liquid radwaste system.

4. Enter containment and make a detailed l inspection. If the leak is located I and can be isolated o I continue indefinitely.peration may I

5. If the leak is located and is not a Refer to Technical Specification I pressure bounJary leak, it may be 3.4.6.2. '

considared identif;ed.

6. No'cify plant management.

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EMERGENCY OPERATING PROCEDURE NO. OP-20 V TITLE: EXCESSIVE REACTOR COOLANT SYSTEM LEAKAGE APPENDI7 Z EMERGENCY PEDCEDURE NOTIFICATION INSTRUCTIONS

1. 1! hen this emergency procedure has been activated and upon direction from the shift foreman proceed as follows.

a. Notify the Plant Superintendent and Supervisor of Operations or their designated alternates.

b. Designate this event a Notification of Unusual Events. Notify those agencies given in General Appendix 2 of the Emergency Procedures (Notification of outside agencier in the event of an emerger.v . )

c. Within one hour notify the NRC Operations Center using the red phone in the control room. Gather sufficient information from all sources prior to calling so that the phone call is meaningful. Notify the NRC that your call is pursuant to 10 CFR Pa-t S0.72, (Notification of Significant. Events).

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PAGE 4 0F 4 REVISION 1 DATE 4/11/80 ,

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