ML20034F572

Summary of 930111 Meeting W/Util Re Proposed Safety Injection Pump run-out Test at Plant.Attendees Listed in Encl 1

ML20034F572
Person / Time
Site:	Summer
Issue date:	02/26/1993
From:	George Wunder Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 9303040011
Download: ML20034F572 (24)

Text

.

' Docket No. 50-395 February 26, 1993 i

LICENSEE:

South Carolina Electric & Gas Company f

FACILITY: Virgil C. Summer Nuclear Station, Unit No. 1

SUMMARY

OF JANUARY 11, 1993 MEETING On January 11, 1993, the staff met with representatives of South Carolina Electric & Gas Company and Westinghouse Electric Corporation to discuss a i

proposed safety injection pump run-out test at the Virgil C. Summer Nuclear

+

Station, Unit No 1.

Data from the proposed test would be used to determine I

whether or not it is acceptable to increase the safety injection pump run-out limit by about 10 percent. The current pump run-out limit is 680 gallons per minute. An increased safety injection flow limit would be necessary to support a future power up-rate for the Summer Station.

The test data may be submitted for staff review as part of a future license amendment application.

An attendance list is provided as Enclosure 1.

A copy of the licensee's handout is provided as Enclosure 2.

ORIGINAL SIGNED BY:

l George F. Wunder, Project Manager Project Directorate 11-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation

Enclosures:

l 1.

Attendance list 2.

Licensee's handout cc w/ enclosures:

Licensee and Service List DISTRIBUTION:

t Docket File

• NRC/ Local PDRs*

i PD 11-1 Reading File

• T. Murley/F. Miraglia 12-G-18 i

J. Partlow 12-G-18 i

S. A. Varga 14-E-4 G. C. Lainas 14-H-3 J. A. Mitchell G. F. Wunder*

i P. D. Anderson E. Jordan MNBB 3701 OGC 9303040011 930226 ACRS (10)

PDR ADOCK 05000395 W. Lyon 8-E-23 P

pga j

Y A hE t

Pa t ?I B 715 L. Plisco, EDO 17-G-21 0200n-ao E. Merschoff, R-II*

• 0nly ones to receive Enclosure 2 f

^

0FC LA:PD21:DRkEd PM:PDR1;DPI D:PD21:DRPE N l

\\g NAME PDAnderson

[b GF [ btmw JAMitchell DATE 02/h/93 02/26 /93 02/ S /93 k

Document Name: SUM 81882.MTS

',.a Virgil C. Summer Nuclear Station South Carolina Electric & Gas Company i

cc:

j Mr. R. J. White I

Nuclear Coordinator s

t S.C. Public Service Authority c/o Virgil C. Summer Nuclear Station P. O. Box 88 (Mail Code 802)

Jenkinsville, South Carolina 29065 J. B. Knotts, Jr., Esq.

Winston & Strawn 1400 L Street, N.W.

I Washington, D. C.

20005-3502 Resident inspector / Summer NPS c/o U.S. Nuclear Regulatory Commission Route 1, Box 64 Jenkinsville, South Carolina 29065 Regional Administrator, Region 11 U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W.,

Suite 2900 Atlanta, Georgia 30323 Chairman, Fairfield County Council Drawer 260 Winnsboro, South Carolina 29180 Mr. Heyward G. Shealy, Chief Bureau of Radiological Health South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, South Carolina 29201 Mr. R. M. Fowlkes, Manager Nuclear Licensing & Operating Experience i

South Carolina Electric & Gas Company Virgil C. Summer Nuclear Station P. O. Box 88 Jenkinsville, South Carolina 29065 i

Mr. John L. Skolds, Vice President Nuclear Operations South Carolina Electric & Gas Company Virgil C. Summer Nuclear Station Post Office Box 88 Jenkinsville, South Carolina 29065

ATTENDANCE LIST ENCLOSURE 1 i

k 4

NRC STAFF LICENSEE WESTINGHOUSE.

i W. Lyon L. Cartin S. Swantner P. Campbell G. Loignon J. Dudiak l

M. Padovan D. Augustine G. Wunder i

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Ji41-Cr?-1993 15: 15 FFO I

C Slf FIEP lELEAP 2.

TO Et(CLOSURE 2 AGENDA FOR NRC MEETING ON SI PUMP RUNOUT TESTFNG AT V. C. SUMMER NUCLEAR STATION INTRODUCTION VCSNS's SIS RECENT DEVELOPMENTS AFFECTING SI PUMP RUNOUT RUNOUT TEST OBJECTIVES MEETING OBJECTIVES GENERIC SI PUMP RUNOUT ISSUE S1 PUMP RUNOUT TESTING AT VCSNS SCOPE INITIAL CONDITIONS SYSTEM AI.lGNMENT I

DATA ACQUISrrION TEST TERMINATION CRJTERJ A TEST SEQUENCE & DURAllON POST TEST DATA EVALUATION OPEN DISCUSSION i

i l

f

ar a

ECCS-HIGH HEAD ?NJECTION i

Fn E.

~u RHR A Se '

RHR B a

gsat

, Normal Q

Chargino g8888A 8889 ha h4 ? C L A 8708A 107 8887AE l[

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'OCLC CCP Al 88888-g n

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Cold Leginjection E r i#

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- RHR 8 Seals ses4 IV M FIGURE AB 10.5 i

x 7

CHARGING PUMP PERFORMANCE CURVE l

G Brake p,

Percent Efikiency Horsepower 8000 -

100 1000 s

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90 l

l-800 y

Head 6000 -

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400 4000--

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l Efficiency Required-('

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2000 -

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l-30 e

1000 30 1

I-20 8>

20 0-NPSH I

l-10 10 I

a I

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1 i

s g

o Total Head 0

100 200 300 400 500 600 700 in Feet of Water GaMons per Wute i>--.

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FIGURE AB 10.4 l 1

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Ji4 6-0"-1993 15: 1E. FFQ1 U. C. SLC11EP IU1 EAR 2.

TO F O" 4

RECENT DEVELOPMENTS AFFECTING SI PUMP RUNOUT POTENTIAL ISSUE ON SI PUMP RUNOUT NOTIFIED OF ISSUE IN FALL OF 1991 JUST PRIOR TO RF-6.

W/ DRESSER RECOMMENDED THAT THE S1 PUMP MAXIMUM FLOW BE LIMITED TO < 675 GPM UNLESS ADDITIONAL TESTING IS CONDUCTED.

DURING RF-6, THE SIS WAS REBALANCED AND THE BRANCH LINE THROTTLE VALVES WERE SET TO LIMIT TOTAL PUMP FLOW TO LESS THAN 675 GPM.

USE OF LOWER RUNOUT LIMIT MADE IT MORE DIFFICULT TO BALANCE THE SIS WITHIN MIN / MAX FLOW LIMITS.

SG REPLACEMENT / POWER UPRATE SG's ARE BEING REPLACED AT VCSNS IN RF-8.

SUPPORTING ANALYSIS ARE BEING PERFORMED AT A CORE POWER OF 2900 MWt TO SUPPORT A FUTURE POTENTIAL UPRATE FROM OUR CURRENT LICENSED LIMrr OF 2775 MWt.

10% MORE SI FLOW IS REQUIRED TO ACQUIRE ACCEPTABLE SBLOCA RESULTS AT UPRATED CONDITIONS.

ONE WAY TO OBTAIN THE REQUIRED SI FLOW INCREASE IS BY INCREASING THE SI PUMP RUNOUT LIMIT.

, - Ji41-U?-1993 35: 17 FPOI1 U.

C. SLU 1' EP t ry. LEAP 2.

10 F.e i

TEST OBJECTIVES DEMONSTRATE THAT VCSNS'S CURRENT TECHNICAL SPECIFICATION LIMIT (680 GPM)

FOR MAXIMUM SI PUMP FLOW IS ACCEPTABLE FOR MAXIMUM CONTIN'UOUS RUNOUT.

DETERMINE SI PUMP'S ABILITY TO OPERATE AT FLOWS > 680 GPM.

GENERATE ADEQUATE DATA SET TO SUPPORT AN INCREASE IN THE TECHNICAL SPECIFICATION MA.XIMUM PUMP FLOW LIMIT.

T

N4 HS-3 993 15: 17 FFO 1 C. EU T EP t tXLEAP 2.

TO i

i MEETING OBJECTIVES 9

INFORM THE NRC OF OUR PLANS AND OBJECTIVES.

SOLICIT NRC FEEDBACK.

[DENTIFY ADDITIONAL ITEMS, IF ANY.

NEEDED TO SUPPORT A TECHNICAL SPECIFICATION CHANGE REQUEST.

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J A! Mr?-1997 15:17 FFO1 U. C. 9 t!1!EP llUCLEAR 2.

70 o.rp

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VIRGIL SUMMER C]IARGING/SI PUMP RUNOUT FLOW BACKGROUND OF GENERIC RUNOUT FLOW ISSUE h

O WESTINGHOUSE ISSUED NOTIFICATION LETTER TO NUCLEAR INDUSTRY RUNOUT FLOW RATES OFTEN EXCEED ORIGINAL DESIGN LIMITS a

PUMP VENDOR PROVIDED INCORIECT M ARGIN IN SEVERAL CASES r

a

- CORRECTED ON A PLANT SPECIFIC BASIS AVAILABLE RUNOUT FLOW MARGIN IS DEPENDENT ON:

a

- PLANT SPECIFIC PUMP CONFIGURATIONS

- PLANT SPECIFIC SYSTEM CONDITIONS ORIGINAL VENDOR TEST CURVES MAY BE MISLEADING 1

a

- HIGHER RUNOUT FLOWS SOMETIMES TESTED

- ACCEPTABLE FOR SHORT-TERM HYDRAULIC PERFORMANCE

- MAY NOT BE ACCEPTABLE FOR CONTINUOUS OPERATION i

i O CONCERNS WITH INCREASED RUNOUT FLOW s MOTOR HORSEPOWER LIMITATIONS a PUMP CAVITATION DAMAGE a MECHANICAL EFFECTS OF CAVITATION

- WEAR AND AGING l

.ua at:- w~3

5

IS FPO!1 U. C. 9311EP tU:LE@ 2.

TO

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i VIRGIL SUMMER CHARGING /SI PUMP RUNOUT FLOW MOTOR HORSEPOWER CONSIDERATIONS i

l O MOTOR HORSEPOWER ISSUES WITH INCREASED RUNOUT FLOW HORSEPOWER COULD EXCEED NAMEPLATE RATING

=

s STATOR TEMPERATURE RISE WILL INCREASE t

MOTOR QUALIFIED LIFE COULD BE REDUCED a

O MOTOR HORSEPOWER IS GENERALLY NOT A LIMITING FACTOR u MARGIN IN MOTOR DESIGNS i

s STEEP SLOPE ON HEAD-CAPACITY CURVE

- FLAT BRAKE HORSEPOWER CURVE 1

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, J41-O"-!M-O 15:18 FPCr1

'>. C. 9.r11 EP ! FJ. lei # 2.

TO

.ir VIEGIL SUMMER CHARGING /SI PUMP RUNOUT FLOW CAVITATION CONSIDERATIONS O PUMP CHARACTERISTICS THAT AFFECT CAVITATION ONSET m NPSH REQUIRED VERSUS FLOW RATE

- ASYMPTOTIC INCREASE WITH CH/SI PUMP DESIGNS u IMPELLER CONFIGURATIONS

- SAND-CAST VS. INVESTMENT CAST COMPONENTS l

a IMPELLER EYE DIAMETER O CAVITATION CHARACTERISTICS a PUMP HEAD WILL DEGRADE DURING CAVITATION SHORT-TERM DEGRADATION MECHANISMS - SEVERE CAVITATION u

- WEAR RING RUBBING

- MECHANICAL SEAL DAMAGE

- BEARING DAMAGE LONG-TERM DEGRADATION MECHANISMS - LOW-LEVEL CAVITATION a

- EROSION OF PUMP INTERNAL COMPONENTS

- REDUCTION IN EXPECTED MECHANICAL SEAL LIFE

- REDUCTION IN EXPECTED BEARING LIFE

- PUMPS CAN RUN ACCEPTABLY FOR FINITE PERIODS

)

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J41-Cr-19 ; 1919 FPCU U. C. sun!EP HUCLE69 2.

TO P

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VIRGIL SUMMER CHARGING /SI PUMP RUNOUT FLOW TYPICAL EXAMPLE OF DROOPING HEAD-CAPACITY CURVE

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34 FCC-19E 15: M FF91

C. 931:1EP ID:LE@ 2.

TO F 1:

VIRGIL SUhBIER CHARGING /SI PUMP RUNOUT FLOW GENERIC RUNOUT FLOW LIMITATIONS AND WESTINGHOUSE RECOMMENDATIONS O GENERIC RUNOUT FLOW LIMITATIONS s DEPENDENT ON PUMP-SPECIFIC DESIGN DETAILS t

a CONSERVATIVE TO BOUND ALL PUMP SPECIFIC VARIATIONS u VALUES SHOWN IN ATTACHED TABLE s BASED ON DATA FROM VENDOR TESTING

[] GENERJC RECOMMENDATIONS TO RESOLVE RUNOUT FLOW DISCItEPANCIES a MODIFY SYSTEM ALIGNMENT TO REDUCE RUNOUT FLOW EMERGENCY RESPONSE GUIDELINES TO MANUALLY REDUCE FLOW

=

JUSTIFY INCREASED FLOW BY REVIEW OF PUMP TEST RESULTS u

- ACTUAL PUMP OPERATION AT MAXIMUM RUNOUT CONDITION

- DATA AVAILABLE FOR ALL CRITICAL PUMP PARAMETERS

3 4 4-(C-I " '. 15:20 FFO I

' f, C. 93 8 EP 18):LE@ 2.

TO P.;

~

VIRGIL SUMMER CIIARGING/SI PUMP RUNOUT FLOW CHARGING /SI PUMP GENERIC RUNOUT FLOW LIMITATIONS PUMP TYPE IMPELLER DESIGN MAXIMUM.

NPSH i

CASTING RUNOUT CONTINUOUS REQ'D TYPE (GPM)

RUNOUT (PT)

(GPM) 4-LOOP CH/SI SAND 550 560 30 2-1/2 RL-IJ 4-LOOP CH/SI INVESTMENT 550 580 30 2-1/2 RL-IJ 3-LOOP CH/SI SAND 650 675 30 2-1/2 RL-13 3-LOOP CH/SI INVESTMENT 650 675 30 i

2-1/2 RL-IJ i

i l

. J4 4-O~~19:0 15 20 FPO:1 U. C EU L' EP t U:LUP 2.

TO t

VIRGIL SUADIER CHARGING /SI PUMP RUNOUT FLOW

[

VIRGIL SUMMER CHARGING PUMP SPECIFICS O PUMP CONFIGURATION (INCLUDING SPARES)

PACIFIC PUMPS MODEL 2-1/2" RL-U a

l a 11 STAGE CENTRIFUGAL PUMP u SAND-CAST IMPELLERS JOHN-CRANE BELLOWS TYPE MECHANICAL SEAL a

KINGSBURY TYPE THRUST BEARING a

u SLEEVE BEARINGS O ORIGINAL PUMP PERFORMANCE CONDITIONS a DESIGN RUNOUT FLOW 650 GPM a TECH SPEC FLOW LIMIT OF 680 GPM REQUIRED NPSH OF APPROX. 25 FEET @ 650 GPM a

[] RUNOUT GUIDELINES PER WESTINGHOUSE NOTIFICATION LETTER 675 GPM FOR CONTINUOUS ACCEPTABLE OPERATION a

Ji4 4-CC-3 9?

15:21 FFO )

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i SI PUMP RUNOUT TESTS

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WILL BE PERFORMED DURING REFUEL 7 WHICH IS SCHEDULED TO BEGIN 3/5/93.

WILL BE INTEGRATED WITH NORMAL TESTING (I.E., INSERVICE PUMP TESTING, FULL FLOW CHECK VALVE TESTING, ETC.)

WILL TEST ALL THREE SI PUMPS WILL TAKE DATA AT PUMP FLOWS UP TO 710 GPM OR UNTIL ANY TEST TERMINATION CRITERION IS REACHED.

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SI PUMP RUNOUT TESTING INITIAL CONDITIONS i

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REFUELING CAVITY IS FLOODED.

i REACTOR VESSEL HEAD IS REMOVED.

.l CORE IS OFFLOADED TO SPENT FUEL POOL.

l SPENT FUEL POOL GATE IS INSTALLED OR I

FUEL TRANSFER TUBE GATE VALVE IS CLOSED.

RWST HAS SUFFICIENT WATER TO SU'PPORT THE TEST RECIRCULATION PATH FROM REFUELING CAVITY TO RWST IS AVAILABLE.

SI/CVCS AND SUPPORT SYSTEMS ARE

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9 SI PUMP RUNOUT TESTING INITIAL SYSTF31 ALIGNMENT SINGLE SI PUMP OPERATING SUCTION FROM RWST

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VCT ISOLATED MINI-FLOW PATH ISOLATED SEAL INJECTION AVAILABLE TO RCPs VIA FF.- 122,127, & 130 wTni FLOW THROTTI ED NORMAL CHARGING PATH VI A FE-122 AVAILABLE WITH FLOW THROTTLED USING FCV-122 s

NORMAL INJECTION PATH VI A FE-943AND XVG-8801 A&B IS i

AVAILABLE SI PUMP FLOW THROTTLED USING THE MANUAL PUMP DISCHARGE V ALVE ANTICIPATED FLOW CONDITIONS AT START OF RL1NOUT TESTING MINI-FLOW 0.0 GPM SEAL INJECTION 24 - 27 GPM NORMAL CHARGING 65 GPM INJECTION PATH TO RCS 503 - 511 GPM TOTAL PUMP FLOW 595 - 600 GPM

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PARAAETERS TO BE RECORDED DURING TESTLNG PARAMFIFER COMMENT 4

FLOW RECORD TOTAL PUMP DISCHARGE FLOW FOR EACH TEST POINT.

SUCTION PRESSURE RECORD TO CALCULATE DEVELOPED HEAD AND AVAILABLE NPSH.

r DISCHARGE PRESSURE RECORD TO CALCULATE DEVELOPED HEAD.

FLUCTUATIONS TO BE NOTED.

SUCTION RECORD TO CALCULATE AVAILABLE NPSH.

TEMPERA'nJRE TIIRUST BEARING RECORD LUBE OIL TEMPERATURE.

TEMPERATURE BEARING HOUSING RECORD (SPECTRAL PLOTS) THRUST BEARING vlRRATION IIOUSING AND RADIAL BEARING HOUSING DISPLACEMENTS AND VELOCITIES IN 3 PLANF3; FIGQUENCY RANGE OF INTEREST IS 1000 TO 20000 HZ.

PUMP CASING RECORD CASING DISPLACEMENTS AND VELOCITIES VIHRATION NEAR THE SUCTION NOZZLE: FREQUENCY RANGE OF INTEREST IS 1000 TO 20000 HZ.

POWER SUPPLY RECORD TO DETERMINE TOTAL HORSEPOWER.

VOI.TAGE MOTOR AMPERAGE RECORD AND MONITOR FOR FLUCTUATIONS WlHLE HOLDING CONSTANT FLOW.

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l TEST TERAHNATION CRITERIA FLOW TOTAL PUMP FLOW > 710 GPM DEVELOPED HEAD FLUCTUATIONS GREATER THAN 5 % WHILE OPERATING AT FIXED SYSTEM RESISTANCE.

TIIRUST BEARING LUBE OIL TEMPERATURE > 165F AT THE TEMPERATURE BEARING HOUSING OUTLET.

BEARING HOUSING DISPLACEMENT > 1.5 MILS PEAK TO PEAK -

VIBRATION OR - VELOCITIES > 0.4 IN/SEC. ALL VALUF3 FILTERED TO RUNNING SPEED.

MOTOR CURRENT MOTOR CURRENT IN EXCESS OF

-l 75 AMPS @ BUS VOLTAGE OF 6900 V 72 AMPS @ BUS VOLTAGE OF 7200 V 69.5 AMPS @ BUS VOLTAGE OF 7450 V WHILE HOLDING CONSTANT FIlOW.

SOUND DISCERNABLE " MARBLE' NOISES.

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r K41-CC-1993 15:23 FF9 1

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l SI PUMP RUNOUT TESTING TEST SEQUENCE AND DURATION ESTABLISH INrrIAL SYSTEM ALIGNMENT RUN PUMP UNTIL PUMP BEARING TEMPERATURES STABILIZE.

ESTABLISH BASELINE DATA INCREASE TOTAL PUMP FLOW TO APPROXIMATELY 620,640. 660 -

AND 675 GPM BY THROTTLING OPEN THE MANUAL PUMP DISCHARGE VALVE UNTIL FULL OPEN AND THEN BY ADJUSTING FCV-l" AT EACll F1 OW POINT, THE PUMP WILL BE RUN FOR SEVERAL MINUTES TO iSTABLISH A STABLE FLOW CONDITION.

AT EACH FLOW POINT, DATA WILL BE TAKEN ONCE FLOW IS STABILIZED.

COLLECT DATA AT PUMP FLOWS AT OR ABOVE CURRENT TS LIMrr WrrH FLOW LIMITED TO NO GREATER THAN 710 GPM.

INCREASETOTAL PUMP FLOW IN INCREMENTS OF 5 GPM (i.e.,680 GPM,685 GPM,690 GPM, etc.) BY ADJUSTING FCV-122.

AT EACH FLOW POINT, THE PUMP WILL BE RUN FOR SEVERAL MINUTES TO ESTABLISH A STABLE FLOW CONDITION.

AT EACH FLOW POINT, DATA WILL BE TAKEN ONCE FLOW IS i

STABILIZED.

STOP TESTING IMMEDIATELY IF ANY TERMINATION CRITERION IS REACHED.

l PERFORM POSTTEST DATA EVALUATION.

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F4 4 1 W3 15:21 FPOf t C. EJJE EP ID:LE@ 2.

TO r-VIRGIL SUMMER CIIARGING/SI PUMP RUNOUT FLOW POST-TEST REVIEW OF DATA O GOAL IS TO DEMONSTRATE ACCEPTABILITY FOR CONTINUOUS OPERATION TRENDING PARAMETERS VERSUS INCREASING FLOW RATES

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EVALUATION AGAINST ACCEPTANCE CRITERIA u

REVIEW OF OTHER TEST DATA FOR SIMILAR PUMPS u

O REVIEW KEY PARAMETERS a VIBRATION LEVELS i

DEVELOPED HEAD VERSUS CAPACITY a

s MOTOR AMPERAGE f

i E BASIS OF ACCEPTANCE CRITERIA u HYDRAULIC INSTITUTE STANDARDS a PUMP VENDOR REQUIREMENTS a MOTOR VENDOR REQUIREMENTS

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