ML20079L457

Public Version of Revised Emergency Plan Implementing Procedures 2-0250031, Boron Concentration Control Offnormal & 2-0410030, HPSI - Offnormal Operation

ML20079L457
Person / Time
Site:	Saint Lucie
Issue date:	11/03/1983
From:	Wethy C FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17214A665	List: ML20079L457
References
PROC-831103-01, NUDOCS 8401260145
Download: ML20079L457 (12)

Text

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. OFF-NORMAL PROCEDURE NL'MBER 2-0250031 REVISION 1 1

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• BORON CONCENTRATION CONTROL OFF-NORMAL

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FOR liiFanIuT!0il CC8'L> T This document ;* "** *** trolled. Befare verify ing ,, ,

c-Reviewed by Facility Review Group _ _1982.. m,,,,,ge February 9,

.Jproved by' C. M. Weth'y ~ ~ ~ ' Plant Manager' February 15.'1982 P a N '19 P f

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f Revision 1 Reviewed by F R G~~ -

I Approved

/ /, u / Plant Manager //- 3 19,D gi

! 3.0 PURPOSE AND DISCUSSION:

This procedure provides instructions to control Reactor Coolant System (RCS) boron concentration and maintain Volume Control Tank (VCT) level when there is a malfunction of the Boron Concentration Control System.

A sudden drop in the VCT level could be caused by a leak in the Charging and Letdown portion of the Chemical and Volume Control System (CVCS), or large change in RCS volume due to RCS leakage or rapid RCS temperature change. /R1 4.0 SYMPTOMS :

Any one of the following symptoms may indicate a failure in the Boron Concentration Control System:

4.1 VCT Low Level alarm (setpoint 35%). (M3) 4.2 VCT hw-Low 14 vel alarm (setpoint 5%) (M11) 4.3 Boric Acid Righ-Iow Flow alarm ' flow deviates from setpoint ~ + 10 ,

gpm). (N40) j 4.4 Demineralized Makeup Water High-Low Flow alarm (flow deviates from setpoint + 10 gpa). (M26) 4.5 Unexplained increase in count rate'or nuclear power when reactor is I shutdown.

4.6 Unexplained reactor coolant temperature change. /R1

, 4.7 Control Element Assembly (CEA) insertion while the CEDS is in the AUTOMATIC mode while raising VCT level by blending. /R1 0

l

Pogs 2 of 6 ST. LUCIE UNIT NC. 2 a 0FF-NORMAL PROCEDURE NUMBER 2-0250031, REVISION 1 .

BORON CONCENTRATION CONTROL OFF-NORMAL -

i s

5.0 INSTRUCTIONS

5.1 IMMEDIATE AUTOMATIC ACTION:

L 1

1. At a VCT level of 5% (decreasing), MV-2504 (RWT to Charging Pumps) opens and MV-2501 (VCT outlet) closes.

~

2. Charging pumps trip on low suction pressure of 10 PSIA. /R1 5.2 DMEDIATE OPERATOR ACTIONS:

FOR ABNORMALLT LOW VCT LEVEL (<42%) , _

1. Check shut V-2500 (Direct Valve).

2. Initiate or verify adequate make-up flow to the VCT.

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3. Analyze all available indications to determine the exact status of both the plant and the CVCS system, then take appropelate subsequant operator action.

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. PA 1 of 6 ST. LUCIE UNIT NO. 2

OFF-NORMAL PROCEDURE NUMBER 2-0250031 REVISION 1 * '

BORON CONCENTRATION CONTROL OFF-NORMAL l

=5.0 INSTRUCTIONS: (continued) 5.3 . SUBSEQUENT OPERATOR ACTIONS:

1. For an uncontrolled, rapidly decreasing VCT level where CVCS or Boron Control System leakage is indicated: ,

3 A. Isolate letdown by closing LCV-2110 Q and P (Letdown I4 vel Control Valves) and 2V-2515, 2V-2516, and 2V-2522, (Intdown

!- Isolation Valves). ,

I B. Isolate charging by taking charging pumps~~to the "STOP" position.

C. Isolate the VCT by closing MV-2501 (VCT Outlet).

. D. Maintain the plant in a steady state condition while locating and isolating the leak. -

. E. Locally inspect the CVCS and Boron Control Systems to determine l source of leakage, and isolate if possible.

F. Attempt to refill the VCT using a blended make-up flow.

I En i If the VCT has been emptied, ensure the charging pumps are vented before use due to possible gas binding from gas build-up in the pumps old lines.

After refilling, ensure VCT level instrumentation reference legs are refilled G. If charging is necessary to perform boration functions, or to restore and/or maintain pressurizer level:

1. If reactor is shut down: Ensure MV-2504 (RWT to charging svetion) is open, and cycle ON/0FF charging pumps as needed.

2. If reactor is critical: . Close and rack out MV-2504, and carefully provide desired blended ratio make-up to the i charging pump suction through MV-2525 at a flow rate equal '

4 to charging flow.

2. If the VCT level falls below 42%, verification of the AUTOMATIC mode can be done as follows:

A. Verify that FCV-2210T (Boric Acid Flow Control Valve) and FCV-22101 (Reactor Make-up Water Flow Control Valve) are in the AUTO position. Turn each to the OPEN-RESET position, then back

. to AUTO.

B. Verify the 2A or 2B BAM pump is in the AUTO position.

C. ' Verify that the Boric Acid Flow Controller (FRC-2210Y, and Water Flow Controller (FRC-2210X), are in the AUTO mode, with flow setpoints set above zero at the proper blend ratio setpoints.

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, , ST. LUCIE UNIT NO. 2

• i 0FF-NORMAL PROCEDURE NUMBER 2-0250031, REVISION 1 .

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BORON CONCENTRATIONC6NTROL'DFF-NORMAL

5.0 INSTRUCTIONS

(continued) 2 5.3 SUBSEQUENT 'OPERXTOR"5CTI'ON: (continued)  !

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2. (continued) t D. Verify the Make-up Water select switch is in the AUTO position. .*

E. Place the control switch for' A0V-2512 (Blend to VCT) to RESET and then back to AUIO.

F. Verify Boric Acid and Water flow on recorders FR-2210Y and

FR22101.

G. If proper flow rates cannot be gained or maintained, utilize

manual control per Section 5.3 3.

3. If the VCT is not being made up to automatically, or if manual -

1 make-up is desired, a blended make-up of the VCT can be completed as follows:

A. Determine the reactor coolant boron concentration from the most recent boron analysis, or calculated concentration compared with Boronometer (if analysis following a concentration adjustment is unavailable).

B. Obtain Boric Acid Blend ratio using present RCS Boron Concentration and the blend ratio curve contained in the plant curves, or figure ratio using the below listed formula.

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B

' '(~ 4Mr"Conciil:~r'itidd"PYs)'*UR'C8"C' dice 56a't'ioii ' PPM) = BLEND RATIO (KCS Concentration FFM)

This will yield the number of gallons of primary water to mix per gallon of boric acid from the BAM tank.

C. If time permits, figure amount of blended make-up volume to be added to the VCT by the below formula:

O [(Desired VCT Level %) - (Present VCT I4ve1%)] I 33.8 GAL /% = TOTAL MAKEUP VOLUME 1

, D. Add the Boric Acid and water to the VCT simultaneously using t{ flow rates determined by blend ratio, or add the calculated quantities using batching method with manual flow control and j use of acid and water flow totalizers.

-t E. Place the make-up mode select switch to MANUAL position.

i F. Ensure both the Boric Acid and Reactor Make-up Water Flow Controllers are in MANUAL, with zero output.

G. Place the Boric Acid Flow Control Valve (FCV-2210Y), and the Reactor Make-up Water Flow Control Valve (FCV-22101) control switches to the "AUT0" position.

H. Start a Boric Acid Make-up Pump.

I. Open 2V-2512 (VCT Blend Valve).

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. Pago 5 of 6 ST. LUCIE UNIT NO. 2 0FF-NORMAL PROCEDURE NUM.B,ER 2-0250031, REVISION 1 BORON CONCENTRATION CONTROL OFF-NORMAL

, 'h9

5.0 INSTRUCTIONS

(continued) 5.3 SUBSEQUENT OPERATOR ACTIONS: (continued)

3. (continued) ,

s l J. Open Boric Acid and Water Flow Control Valves by varying controller outputs to achieve desired flow rates as determined .

in Step 2. '-

l K. Blend up the VCT to normal level.

L. When the calculated quantities of acid and water have been added, or normal. level has been achieved, Stop the blend to ,

the VCT.

M. Ensure Boric Acid pumps are stopped, and control switches j returned to "AUT0", ensure the 2V-2512 is closed.

a 4. For failure of the entire Boron Concentration Control System, i asintain VCT level and proceed as follows:

A. Station an operator in the VCT valve gallery at the blending

tee, and an operator at the boric acid station.

B. Establish and maintain constant communications with the '

operator St the boric acid station.

C. Start 2A or 25 BAM pump.

D. Have operator at blending tee open 2V-2512 (VCT Blend Valve).

E. Instruct operator at boric acid station to position 2V 2180 (Manual Dilute Valve), in 2A charging pug room (RME to charging pump suction), and the manual borate valve 27 2647 (FCV-2210Y bypass valve) at the BAM station, to establish water and acid flow rates in accordance with proper blend ratio using latest RCS boron analysis cogared to boronometer.

F. If flow indications malfunction, instruct the operator to open 2V 2180 and 2V 2647 one quarter handwheel turn, and stand by.

Observe Tave, CEA position, and the Boronometer while instructing the operator to position V-2180 and V-2647 as i required to maintain stable conditions.

G. Verify CEA position, Tave and the Boronometer frequently.

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. Page 6 of 6 ST. LUCIE UNIT NO. 2 .

OFF-NORMAL PROCEDURE NUMBER 2-0250031, REVISION 1 BORON CONCENTRATION CONTROL OFF-NORMAL ,

6.0 REFERENCES

/R1 I

6.1 CE P&ID, E-19367-210-120, Chemical and Volume Control System.

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6.2 CE P&ID E-19367-210-121, Chemical and Volume Control System.

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6.3 Er 2-0120042, "Ioss of Reactor Coolant". /R1 l

7.0 RECORDS, REPORTS & NOTIFICTION:

7.1 Normal log entries. - -

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ST. LUCIE UNIT 2 0FF-NORMAL OPERATING PROCEDURE 2-0410030 /

REVISION 2

1.0 TITLE

[

HPSI - 0FF NORMAL OPERATION .

2.0 REVIEW AND APPROVAL:

Reviewed by Facility Review Group December 28 1982 Approved by J. H. Barrow (for) Plant Manager Dece,ber 28 198_2_

Revision 2 Reviewed by FRG hi 19N Approved by 3 /Mhu ,,v b ant Manager // / 19<[2 y o .

3.0 PURPOSE AND DISCUSSION:

3.1 Purpose

This procedure provides instructiona for various off normal situations that could occur when High Pressure Safety Inject 1on (HPSI) is required.

3.2 Discussion

1. No single active component failure will prevent the system from performing its design function. However, manual action may be required to maintain maximum system effectiveness.

2. The minimum components required to function are one HPSI pump, one LPSI pump, and three Safety Injection Tanks.

3. All motor and air operated valves required to operate during safety injection have been designed to fail in such a position as to ensure failsafe operation.

4 HPSI pumps for each flow path are located in separate water tight rooms to ensure that a suction or discharge line break will not disable both flow paths.

5. There exists a possibility that during operation with RCS pressure

<1836 psia a loss of coolant accident could occur with safety injection bloched. Should conditions indicate an LOCA, safety injection will have to be manually initiated.

FOR INFORMATION ONLY This document is not controlled. Before use, ve ify information with a controlled documen+.

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, OFF-NORMAL OPERATINC PROCEDURE NUMBER 2-0410030, RZYISION 2 ,

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$ 3.0 PURPOSE'AND"DIICDistDN (continued)

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3.2 bis e'u'is4n i  : (continued)

6. If the HPSI system has been a.itomatically actuated because of a Iow pressure . condition, it must remain in operation until

(

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A. RCS is maintained 200F subcooled.

B. Pressuriser pc===uce and level is controllable with indicated level >30% and stable.

'} C. No indications of RCS voids.

D. S/G 1evel (small break) is controllable with indicated wide -

range level >40% and stable. .

E. Shutdown cooling equipment is available and entry conditions can be established as required by RCS cooldown procedures.

F. Permission is obtained from the Assistant Nuclear Plant Supervisor / Emergency Coordinator.

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7. The operator has determined that no LOCA conditions exist. /R2

4.0 SYMPTOMS

4.1 Safeguards room sump high level annunciation 4.2 Area radiation monitor alara 4.3 Visual indication of safety injection system leakage 4.4 Visual indication of pug or valve malfunction at the RTGB 4.5 Yo indication of safety injection loop flow

. 4.6 Indication of excessive safety injection loop flow

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. ST. LUCIE UNIT NO. 2  ;

0FF-NORMAL OPERATING PROCEDURE NUMBER 2-0410030, REVISION 2 l HPSI - 0FF NORMAL OPERATION 1

5.0 INSTRUCTIONS

5.1 Immediate Automatic Action:

1 None i

5.2 Immediate operator Action: ,.

5.2.1 Observe plant parameters; determine nature of the problem, take appropriate subsequent action.

5.3 Subsequent Operator Action:

5.3.1 Failure of motor or air operated valves to operate on SIAS

1. Manually operate valves.

~

5.3.2 Pupture of pump suction line upstream of pump suction isolation valve:

1. Close affected header MV suction valve (RWT or containment sump).

2. Stop affected HFSI and LPSI Pumps.

5.3.3 Rupture of pump discharge line between pump discharge isolation valve and SI header valves:

1. Close affected header isolation valve.

2. Stop pump.

3. Close pump suction or discharge isolation valve.

5.3.4 Rupture of pump discharge line between header isolation valve and loop isolation valves:

1. Close header isolation valve.

2. Close affected loop isolation valve (s).

3. Stop affected pump.

5.3.5 Rupture of SI line between loop isclation valve and RCS:

1. Close affweted loop isolation valve.

5.3.6 No indication of flow to loop (s):

1. Verify isolation valves in correct rosition.

5.3.7 Indication of LOCA with safety injection signal blocked'

1. Manually initiate safety injection either by unb1cs it signal or with manual pushbuttons.

2. Verify actuation.

. . . .- Ptg2 4 of 4

, ST. LUCIE UMIT No. 2 OFF-NORMAL OPERATING PROCEDURE NUMBER 2-0410030, REVISION 2 t' c"

y HPSI - 0FF NOREU OPERATION ,

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6.0 REFERENCES

,. 6.1 CE P&ID E13172-310-130, Safety Injection System, Sheet 1  !

6.2 CE P&ID E13172-310-131, Safety Injection System, Sheet 2 I

7.0 RECORDS REOUIRED: .

7.1 Normal log entries e

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