ML13311A537

Safety Injection Termination Following Loss of Secondary Coolant, Revision 0

ML13311A537
Person / Time
Site:	San Onofre
Issue date:	05/20/1982
From:	Southern California Edison Co
To:
Shared Package
ML13311A465	List: ML13311A464 ML13311A466 ML13311A467 ML13311A468 ML13311A471 ML13311A473 ML13311A482 ML13311A494 ML13311A515 ML13311A527 ML13311A537 ML13311A577 ML13311A634 ML13311A682 ML13311A701 ML13311A711
References
SO1-1.2-1.21, NUDOCS 8205240488
Download: ML13311A537 (16)

Text

LOSS OF SECONDARY COOLANT STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED EMERGENCY INSTRUCTION 501-1.2-1.21 SI TEWINATION FOLLOWING LOSS OF SECONDARY COOLANT I.

PURPOSE:

The purpose of this instruction is to provide a method to terminate safety injection after a loss of secondary coolant once RCS conditions have stablized to SI termination criteria.

Normal charging and letdown will be established.

Guidance is provided to insure controlled conditions are maintained by monitoring the need to reinitiate safety injection.

8205240488 820520 PDR ADOCK 05000206 1 of 16 P

PDR

ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE:

Foldout page should be open.

CAUTION If offsite power is lost after SI is reset, manual SI initiation will be necessary to load safeguard equipment onto the diesel Dowered 4 KV busses.

Verify SI Reset:

a. SLSS surveillance panel

a. Reset SI at SLSS load group lights - ON.

surveillance panels..

b. Verify lockout switches

b. Manually reset lockout

-RESET.

switches.

2 Stop SI System PmPins And Place in Standby:

a.

Stop both feed pumps.

b.

Stop both SI pumps.

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501 -1.2-1.21 SI TERMINATION FOLLOWING REV 0 LOSS OF SECONDARY COOLANT STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 3

Verify SI Reinitiation NOT Required:

a. After SI termination RCS Manually reinitiate SI pressure decreases -

LESS AND go to S01-1.2-1.0 THAN 200 psi.

EXCTOR TRIP OR SAFETY IWECTION, step 5.

b.

After SI termination pressurizer level decreases - LESS THAN 10V.

c. RCS subcooling - GREATER THAN 40 OF.

CAUTION AFW pump water supply must be maintained to ensure adequate heat sink.

4 Check CST Level:

a. CST Level -

GREATER

a. IF CST level low, TRAN 4 FT.

TREN transfer to ITTrnate AFW water supply per S01-7-3, AUXILIARY FEEDWATER SYSTEM.

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eSTP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED CAUTION Maintain at least 25 gpm AFW flow to each SG with established AFW flow until SG narrow range level reaches 500.

5 Adjust AFW Flow:

a. Verify present cooldown

a. Adjust AFW flow to rate - LESS THAN maintain cooldown rate 100 oF/HR AND SG less than 100 OF/HR narrow range level AND IF possible to GREATER THAN 10%.

restablish SG narrow range level greater than 10%.

b. While maintain cooldown rate less than 100 oF/hr, attempt to adjust AFW flow to maintain SG narrow range level at 50%.

6 Verify Offsite Power Available:

a. 220 KV switchyard voltage

a. IF low, THEN go to

- NORMAL.

M01-1.7.T,~TOSS OF OFFSITE POWER/STATION BLACKOUT.

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SC-1.2-1.21 SI TERMiNATION FOLLOWING REV 0 LOSS OF SECONDARY COOLANT STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTNE 7

Reset Containment Isolation:

a. Containment pressure is

a. IF-high, THEN depress LESS THAN 1.4 PSIG.

override pu-sbuttons for valves needed open as containment systems are placed in service. Go to step 8.

b. Depress Train A AND B containment isolation pushbuttons.

8 Verify Charging Established:

a. One charging pump

a. Start standby breaker -

CLOSED.

charging pump.

9 Establish Pressurizer Level:

a. Adjust charging flow to obtain pressurizer level at 252.

10 Verify CCW System Operation:

a. Two CCW pump breakers

a. Manually start pumps.

CLOSED.

b. CCW flow indication

b. IF low, THEN start

- GREATER THAN 7tird CC pump.

1620 GPM.

C.

CCW low pressure alarm

c. IF low, THEN start RESET.

tird CC pump.

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501-1.2-1.21 SI TERMINATION FOLLOWING REV 0 LOSS OF SECONDARY COOLANT SEACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 11 Align Letdown System:

a.

Place inservice RHR heat exchanger temperature controller to - MANUAL, SET AT 251 OPEN.

b. Place letdown pressure controller PCY 1115 to MANUAL, SET AT 50 3PEN.

c. Verify RCS letdown CV 525

c. Manually open valves.

AND CV 526 - OPEN.

d. Verify LCV 1112 - OPEN.

d. Manually open valve.

e. Verify LCV 1100 A control

e. Manually position switch - AUTO.

switch.

12 Place Letdown In Service:

a. Open an orifice isolation valve AND manually adjust letdown pressure and temperature to stable conditions.

b. Place letdown pressure controller to -

AUTO, SET AT 350 PSIG.

c. Place inservice RHR heat exchanger temperature controller PCV 1105 to AUTO, SET AT 120 OF.

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ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 13 Align Charging Pump Suction To VCT:

a. Verify VCT level -

GREATER

a. Manually restore THAN 20%.

level.

b. Open MOV 1100 C.

c. Close MOV 1100 B AND D.

d. Place control switches for MOV 1100 B, C AND C in AL1CO.

14 Establish Normal Charging:

a. Establish desired chargIn flow with FCV 1112.

16 Align VCT Makeup Control System:

a. Set makeup controller for COLD SHUTDOWN CONCENTRATION.

b. Makeup set for automatic.

b. Adjust controls as appropriate.

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501-1.2-1.21 SI TERMIATION FOLLOWING REY 0 LOSS OF SECONDARY COOLANT ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 16 Check RCP Cooling:

a.

RCP low CCW flow alarms

a. Manually adjust CCW RESET.

flow.

b. RCP seal injection flow

b. Establish seal water established with RCP place flow controllers thermal barrier delta in AUTO set to pressures - GREATER THAN maintain a positive 10 INCHES.

delta pressure.

c.

Verify RcP sea! return

c. Manua"lv open valves.

CV 527 AND CV 528 - OPEN.

d. Verify seal leakoff is

d. Place PCY 1115 A, B LESS THAN 4.5 GPM.

AND C in AUTO.

17 Establish Pressurizer Level on trol:

a. Verify charging flow controller FCV 1112 in - AUTO, CASCADE CONTROL.

b. Place pressurizer level controller in -

AUTO, MAN SET AND SET AT 50%0.

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S01-1.2-1.21 SI TEINATION FOLLOWING REV 0 LOSS OF SECODARY COOLANT ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 18 Establish Pressurizer Pressure Control:

a. Operate spray valves to control pressurizer pressure within Tech Spec Limits for existing RCS temperature.

b. Enercize one control AND one backup set of pressurizer heaters.

c. Operate remaining control AND backup set of pressurizer heaters as necessary to maintain pressure within Tech Spec Limits for existing RCS temperature.

d. Use auxiliary spray as necessary.

19 Check RCS Temperature:

a. RCS subcooling - GREATER

a. Dump steam to THAN 50 OF.

establish 50 OF subcool ing.

1) Limit RCS cooldown rate less than 50 OF/hr.

2) Dump steam to condenser if available.

OR Dump steam to atmosphere.

b. Attempt to adjust RCS cooldown rate less than 50 OF/hr by throttling AFW flow.

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501-1.2-1.21 SI TERMINATION FOLLOWING REV 0 LOSS OF SECONDARY COOLANT STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED CAUTION If possible RCPs should be run such that pressurizer spray capability is assured.

20 Estatish Conditions For RCP Operation:

a. Start at least one RCP

a. IF an RCP cannot be per S01-1-3, started, THEN go to REACTOR COOLANT PUMP step 21.

OPERATION.

b. IF at least one RCP is runrnng, THEN go to step 22.

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LOSS OF SECONDARY COOLANT STP.

ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 21 Verify For RCS Natural Lircuiation Using Trended Values:

a. RCS subcooling

• Attempt to establish GREATER THAN 50 OF.

natural circulation by increasing feed to

b. Steam pressure SGs.

STABLE.

c. RCS cod leg temperature STABLE OR SLOWLY DECREASING AND NEAR SITURATION TEERATURE FOR STEAM HEADER PRESSURE.

d. Core exit TCs - STABLE OR SLOWLY DECREASING.

e. Refer to O-3-6, PLANT OPERATION WITH NATURAL CIRCULATION.

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ST ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 22 Check intermediate Range Flux:

a.

Flux - LESS THAN

a. Continue with step 2x10-9 AMPS.

20.

WHEN flux decreases below 2x1O-9 amps, THEN perform steps277b AND 22.c.

b. Verify source range detectors high voltage ON.

c.

Transfer NIS recorders to source rance.

23 Depressurize RCS:

a.

Use norma pressurizer

a. IF letdown in service, spray to remain within THEN use auxiliary Tech.

Spec.

Pressure spray. IF NOT in Temperature Limits.

serviceTHEN use one pressurizer PORY.

24 Verify SI Reinitiation NOT kequi red:

a. RCS pressure -

STABLE Manually reinitiate OR DECREASING IN A SI.

Go to

• N Maual rentt RO'ED MMNE R.

SO0-1.2-1.0, REACTOR TRIP OR SAFETY

b.

Pressurizer level -

GREATER INJECTION, step 5.

THAN 10%.

c.

RCS subcooling - GREATER THAN 50 OF.

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ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINE 25 Return SI Valving To Standby Status:

a. Close MOV 850 A, B, AND C.

b. Close HV 851 A AND B.

c.

Close HY 853 A AND B.

d.

Close CV 675 A AND B.

e.

Close SV 2900 AND SY 39C0.

f.

Close bonnet vent block valves for HY 853 A AD B.

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ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 26 Check Containment Spray System:

a. Refueling water pump

a. Go to step 26.

breakers - CLOSED.

b. Containment pressure

b. IF pressure high, THEN LESS THAN 1.4 PSIG.

maintain containme Y ~

spray until containment pressure is reduced below 1.4 psi9. Go to step 2E.

c. RWST level - GREATER THAN

c. IF less than 21%,

THEN 213.

iTiagn containment spray for recirculation per SC!-1.2-1.22, CONTAINMENT SPRAY RECIRCULATION FOLLOWING LOSS OF SECONDARY COCLANT.

d. Stop containment spray and place in standby:

1) Reset CSAS Trains A AND B.

2) Stop both hydrazine additive pumps.

3) Close SV 600 AND SV 601.

4) Close spray valves CV 82 AND CV 114.

5) Stop both refueling water pumps.

CAUTION If containment pressure increases above 10 PSIG containment spray must be reinitiated.

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501-1.2-1.21 SI TERMINATION FOLLOWING REY 0 LOSS OF SECONDARY COOLANT STP.

ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 27 Check if RHR System Can Be Placed In Service:

a.

RCS pressure - LESS THAN

a. IF greater than 400 PSIG.

4UO psig, THEN return to step 19.

28 Place RHR In Service:

a. Place RHR in service per

a. IF break is inside SO1-4-9, RESIDUAL HEAT conai ment AKE RHR EOVAL SYSTEM.

is NOT avail e

THEN go to S1"-1.2-1.23, LOSS OF RHR DUE TO LOSS OF SECCNDARY COOLANT IN CONTAI NMENT.

29 Investigate Cause of SI:

a. Emergency Coordinator will determine cause of SI.

b. Evaluate long term plant status.

30 Shutdown Unnecessary Plant Equipment And Align Plant Systems For Cooldown:

a.

Go to S01-1.2-1.01 REACTOR TRIP RESPONSE, step 10.

-END H. E. MORGAN

MANAGER, STATION OPERATIONS 15 of 16

S01-1.2-1.21 Rev 0 MDTOR DRIVEN AFW PUP RESTAR. CRITERIA

a.

IF a motor driven AFW pump trips on low discharge pressure, THEN:

1) Lower AFW flow controllers.

2)

Reset AND restart pump.

SI REINITIATION CRITERIA FOLLOWING LOSS OF SECONDARY COOLANT

a. Reinitiate SI if ANY ONE of the parameters listed below occurs:

1)

RCS Pressure-ThrEtASES BY 200-PSI AFTER SI TERMI! NATION.

2)

RCS -Subcooling -

LESS THAN 40 DF.

3) Pressurizer Level -

DECREASES BY 10o AFTER SI TERMINATION.

AFW SUPPLY -SWTCHOVEP CRITEPON

a. IF CST level less than 4 FEET, THEN switch to alternate AFW supply.

COLD LEG RECIRCIULATION 5 ITCH:VER CRITERIA

a. IF RST level less than 210C, THEN align SI system fcr cold leg injectior id recirculation per SC1-1.2-T.3, TRANSPER TO COLD LEG IJECTION AND RECIRCULATION.

SYMPTYS FOR RESPONSE TO IRADEQUATE C ORE CDOLING

a. Go to S01-1.2-14, RESPONSE TO IADEQUATE CORE COOLING, when ANY ONE of the following symptoms occur:

1)

Five of more core exit TCs - GREATER THAN 1200 OF.

OR

2)

ROS h-7 leg temperatures - GREATER THAN 700 0F.

SYMPTOMS FOR RESPONSE TO LOSS OF SECONDARY HEAT SINK

a.

Go to 501-1.2-15, RESPONSE TO LOSS OF SECONDARY HEAT SI

, if AFW Flow is NOT AVAILABLE.

IF EVENTS REQUIRE IMPLEMENTATION OF THIS PROCEDURE:

a. Notify Shift Technical Advisor.

b. Notify Shift Comunicator.

c. Determine if event is classified as an emergency and requires notification of offsite agencies and implementation of the Emergency Plan per S0123-VIII-11, RECOGNITION AND CLASSIFICATION OF E4ERGENCIES.

d.

IF event is NOT classified as an emergency in c above THEN determine if

'Etification S' the NRC is required within one hour per 501-14-13, NOTIFICATION TO NRC DF SIGNIFICANT EVENTS.

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