ML17285A317

Summary of 890216 Meeting W/Devonrue Re BWR-6 Alternate Ac Approach to Satisfy Station Blackout Rule.Attendance List & Handout Matl Encl

ML17285A317
Person / Time
Site:	Perry, Grand Gulf, Columbia, Clinton, 05000000
Issue date:	03/02/1989
From:	Tam P Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
TAC-40577, TAC-68529, TAC-68549, TAC-68550, TAC-68584, TAC-68626, NUDOCS 8903140174
Download: ML17285A317 (65)

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Docket Nos.

50-461 50-416 50-417 50-440 50-397 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 March 2, 1939 ORGANIZATION:

DEVONRUE (A Consulting Firm Representing Several Utilities)

REFERENCE:

MEETING

SUMMARY

- BWR-6 ALTERNATE AC APPROACH TO SATISFY STATION BLACKOUT RULE (TAC 68529,

68549, 68550$

68584, 68626$

40577)

(1)

Meeting notice, P.S.

Tam to J. Stolz, February 2, 1989 (revised)

(2)

Meeting summary by P.S.

Tam, December 7, 1988 (3)

Letter, Y. Pareto of DEVONRUE to NRC, February 6, 1989 (Accession No. 8902100317)

The working meeting was held on February 16, 1989 as requested by DEVONRUE.

Before the meeting, DEVONRUE provided a draft document by reference (3), this document presents DEVONRUE's approach to a standard BWR-6 alternate AC design to satisfy the station blackout rule (10 CFR 50.63).

DEVONRUE personnel had previously described the concept to the staff (see reference (2)).

By using enclosure 2,

DEVONRUE personnel described in detail the proposed concept to satisfy the station blackout rule, for the BWR-6 plants and WNP-2.

The concept, characterized by DEVONRUE as an "alternate AC concept",

uses the existing HPCS (high pressure core spray), including its dedicated, independent and self-contained diesel generator.

The HPCS would be relied upon to sustain the plant for a station blackout duration of 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

Details of the presentation may be found in the handout material (enclosure 2).

No plant-specific information was discussed.

Staff attendees noted that the HPCS diesel generator is not strictly used as an "alternate AC source",

as the term is meant in the context of station blackout, ie. the HPCS diesel generator is dedicated to division 3 and cannot be connected to division I or division 2 safety buses.

Although the HPCS may provide adequate decay heat removal capabi lity during a four-hour station blackout, the staff asked DEVONRUE to address other loads, such as instrumentation, battery capacity, cooling of control room and equipment room, that will be needed to maintain safe shutdown conditions for the duration of station blackout, and recovery therefrom.

DEVONRUE committed to address the issues raised by the staff and to revise its draft standard

response, to be used by its client utilities, and submit it formally.

Also, DEVONRUE committed to use as much as possible the NUMARC standard generic response format in the revision of their standard response.

8903140i74 890302 PDR I"-IDOCK 05000397 PDC No future meeting was planned.

Enclosure I is a list of all meeting attendees.

Signed by Enclosures As stated cc w/enclosures:

See next page Peter S.

Tam, Senior Project Manager Project Directorate I-4 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation DISTRIBUTION with encl osure oc et s

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'oquesne Light Company CC:

Jay E. Silberg, Esquire Shaw, Pittman, Potts and Trowbridqe 2300 N Street, N.W.

Washington, DC 20037 Kenny Grada, tlanager Nuclear Safety Duquesne Light Company P. 0.

Bcx 4 Shippingport, Pennsylvania 15077 John A. Lee, Esquire.

Duquesne Light Company One Oxford Centre 301 Grant Street Pittsburgh, Pennsylvania 15279 W.F. Carmichael, Commissioner Department of Labor 1800 Washington Street East Charleston, West Virginia 25305 John D. Borrows Director, Utilities Department Public Utilities Commission 180 East Broad Street

Columbus, Ohio 43266-0573 Director, Pennsylvania Emergency management Agency Post Office Box 3321 Harrisburg, Pennsyl vania 1?105-3321 Beaver Yalley Power Station Units 1

E 2

Bureau of Radiation Protection Pennsylvania Department of Environmenta 1 Resources ATTN:

R. Janati Post Office Box 2063 Harrisburg, Pennsylvania 37120 Payor of the Borrouoh of Shippingport Post Office Box 3

Shippingport, Pennsylvania 15077 Ashl'ey C. Schannauer Assistant City Solicitor City of Pittsburgh 313 City-County Building Pittsburgh, Pennsylvania 15219 Regional Administrator, Reoion I

U.S. Nuclear Regulatory CoFmission 475 Allendale Poad King of Prussia, Pennsylvania 19406 Resident Inspector U.S. Nuclear Regulatory Commission Post Office Box 181 Shippingport, Pennsylvania 15077

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THE HPCS DlESEL GENERATOR AS AN ALTERNATE AC POWER SOURCE FEBRUARY 14, 1989 Prepared by:

Devonrue 180 Lincoln Street

Boston, MA 02111 Prepared for:

HPCS Alternate AC Task Force

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DEVONRUE -- Scchnol nnd pro/csslonal scn toes OVERVIEW OVERALL DESCRIPTION OF HPCS KEY HPCS SYSTEM FEATURES NUMARC 87-00 APPENDIX B CRITERIA HPCS PERFORMANCE TO CRITERIA

SUMMARY

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DEVONRUE -- foohnol and profosslonal sorrioos

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PRESENTATION OBJECTIVES INTRODUCE A CONSISTENT ALTERNATE AC CONCEPT FOR THE BWRs WITH HPCS DIVISIONS OBTAIN STAFF COMMENTS AND CONCURRENCE

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OVERALL DESCRIPTION OF HPCS STANDBY AC POWER SOURCE A NORMAL AC

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POWER RHR SERVICE WATER RHR DIVISION I l

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LPCS

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NORMAL AC POWER DIVISIONIII WATER LEG PUMP PLANT DC POWER SOURCE A I

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HPCS DIESEL GENERATOR I

I WATER LEG PUMP HPCS REACTOR PRESSURE VESSEL AUTOMATIC DEPRESSURIZER FUNCTION DG SERVICE WATER RHR SERVICE WATER NORMAL AC POWER STANDBY AC POWER SOURCE 8 DC POWER SOURCE C I

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I DIVISION II DC POWER SOURCE B I

WATERi LEG PUMP i I.PCI I

LPCI RHR RESIDUAL HEAT REMOVAL HPCS HIGH PRESSURE CORE SPRAY LPCS LOW PRESSURE CORE SPRAY LPCI -

LOW PRESSURE COOLANT INJECTION MODE OF RHR ELECTRICAL PIPING

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DEVONRUE -- scchnol and psofcsslonal scsvlccs THE HPCS DIESEL GENERATOR TYPE STATIONARY, INJECTION WATER COOLED TURBOCHARGED TWO STROKE CYCLE IN-LINE, COMPRESSION IGNITION TYPE DEDICATED AUXILIARIES

- COMPRESSED AIR STARTING SYSTEMS (INCLUDING COMPRESSOR AND ACCUMULATORS)

- COOL-WATER SYSTEM (INCLUDING PUMP AND HEAT EXCHANGER, AND STANDBY HEATER WITH TEMPERATURE CONTROL)

- LUBRICATION OIL SYSTEM (INCLUDING OIL RESERVOIR, PUMPS, STRAINER, FILTER, COOLER AND STANDBY HEATERS WITH TEMPERATURE CONTROL)

GENERATOR AUXILIARIES GENERATOR CONTROL PANEL INCLUDING EXCITER AND VOLTAGE REGULATOR; GENERATOR GROUNDING SYSTEM ACCESSORIES GROUNDING COMPARTMENT INCLUDING GROUNDING TRANSFORMER AND GROUNDING RESISTOR'ESISTANCE TEMPERATURE DETECTORS WITH COMMON TERMINAL BOX; CURRENT TRANSFORMER SEISMIC CLASS I

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DEVONRUE -- Scchno and proicsslonal scrrlccs FUEL OlL SYSTEM s

FUEL OIL SYSTEM INCLUDES: A FUEL OIL STORAGE TANK) A FUEL OIL DAY TANK, A FUEL OIL TRANSFER PUMP, FILTERS, STRAINERS, AND INSTRUMENTATION DEDICATED FUEL STORAGE AND TRANSFER FACILITIES NOT SHARED WITH ANY OTHER DIVISION TANK SUPPLY SUFFICIENT FOR 7 DAYS OF DIESEL GENERATOR OPERATION AT DESIGN LOAD ENGINE DRIVEN FUEL TRANSFER PUMP (TRANSFERRING FUEL BETWEEN THE DAY TANK AND THE STORAGE TANK)

DC FED FUEL TRANSFER PUMP FOR START-UP PURPOSES AUTOMATICAND MANUALFUEL OIL TRANSFER PUMP OPERATION STRAINERS AND FILTERS PROVIDED IN THE FUEL LINES TO REMOVE PARTICULATES

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DEVONRUE Sonhood and profasslaaal sarrkas r

DIESEL GENERATOR JACKET WATER COOLING SYSTEM PURPOSE:

REMOVE HEAT FROM THE DIESEL GENERATOR TO PERMIT CONTINUOUS USE AT MAXIMUMLOAD IN STANDBY CONDITIONS, KEEP LUBE OIL WARM TO ENHANCE ENGINE QUICK START AND LOAD ACCEPTANCE IN STANDBY CONDITIONS, JACKET WATER MAINTAINEDAT CONSTANT TEMPERATURE BY HEATER JACKET WATER SYSTEM PROVIDES SUFFICIENT HEAT SINK TO PERMIT A HOT HPCS ENGINE TO START AND OPERATE BRIEFLY WITH UNAVAILABLEULTIMATE HEAT SINK COOLING WATER TREATMENTTO PRECLUDE CORROSION AND ORGANIC FOULING

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DEVONRUE -- techno and profc'ssional scrvicc's THE DlESEL GENERATOR AIR START SYSTEM AIR SYSTEM PROVIDED WITH TWO INDEPENDENT AND REDUNDANT STARTING TRAINS AIR STARTING SYSTEM INCLUDES: STARTING AIR COMPRESSORS, RECEIVERS, MOTORS, AND DRYERS AIR STORED AT PRESCRIBED PRESSURE UNTIL NEEDED TO START THE ENGINE MOISTURE REMOVED IN DRYERS AUTOMATICSTART OF COMPRESSORS WHEN AIR PRESSURE DROPS BELOW A PRESET VALUE STRAINERS AND FILTERS ARE PROVIDED TO REMOVE PARTICULATE CONTAMINATION AIR SYSTEM ESSENTIAL PARTS HOUSED IN SEISMIC CATEGORY I STRUCTURE

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DEVONRUE -- tcchnol and profc'sslonal services THE HPCS DIESEL GENERATOR LUBRICATIONSYSTEM PURPOSE: SUPPLY LUBE OIL TO ENGINE BEARINGS AND MOVING PARTS LUBE OIL SYSTEM CONSISTS OF: PUMPS, OIL SUMP PAN, AND HEAT EXCHANGER KEEP-WARM FEATURE TO MAINTAINA STEADY LUBE OIL TEMPERATURE FOR QUICK START-UP LUBRICATION SYSTEM HOUSED IN SEISMIC CATEGORY 1 STRUCTURE

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DEVONRUE !school and professional serrfecs THE HPCS COMBUSTION AIR INTAKE AND EXHAUST SYSTEM SYSTEM CAPABLE OF SUPPLYING RELIABLE QUALITYAIR TO THE DIESEL ENGINE AND EXHAUSTING COMBUSTION PRODUCTS TO ATMOSPHERE SYSTEM CONSISTS OF: INTAKE AIR FILTER, INTAKE AIR SILENCER, AND EXHAUST SILENCER 10

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Expansion Tank AirIntake and Exhaust

, Day Tank torage Tank To Ultimate Heat Sink Jacket Cooling Water Diesel Generator Transfer Oil Pump Lube Oil System HPCS pump TYPICAL SCHEMATIC OF HPCS COMPONENTS 11

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HPCS OPERATION CHARACTERISTICS DESIGNED AS A SOURCE OF COOLANT INJECTION AND THE SYSTEM, INCLUDING SRVs PROVIDES DECAY HEAT REMOVAL FROM THE CORE SYSTEM STARTS AUTOMATICALLYAT SIGNAL OF HIGH DRYWELL PRESSURE/LOW WATER LEVEL SYSTEM MAY BE STARTED MANUALLYFROM THE CONTROL ROOM 12

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DRVONRUE -- lechnol and professional services HPCS OPERATION SEQVENCE AT INITIATIONSIGNALHPCS COMPONENT RESPOND AS FOLLOWS

1) HPCS DIESEL GENERATOR IS SIGNALED TO START

2) HPCS PUMP IS AUTOMATICALLYSTARTED

3) PUMP SUCTION FROM ON-SITE WATER SOURCE

4) TEST RETURN VALVES SIGNALED TO CLOSE

5) HPCS INJECTION VALVE IS SIGNALED TO OPEN HPCS CONTINUES TO RUN UNTIL HIGH WATER LEVEL TRIP IS REACHED HPCS PUMP MOTOR AND INJECTION VALVE PROVIDED WITH MANUALOVERRIDE CONTROLS 13

DEVONRUE -- /echno and professional scrvlccs

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DECAY HEAT REMOVAL CAPABILITY HPCS SYSTEM, INCLUDING SRVs, PROVIDES ADEQUATE DECAY HEAT REMOVAL CAPABILITYDURING A FOUR HOUR STATION BLACKOUT HPCS PROVIDES CLOSED LOOP HEAT REMOVAL MECHANISM SUBSTANTIAL AMOUNTS OF HEAT CAN BE ABSORBED BY USE OF SUPPRESSION POOL AS HEAT SINK 14

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DEVONRUE -- technol and professional services Containment teamline Suppression pool SRV On-site Storage Tank HPCS pump HPCS DECAY HEAT REMOVAL CAPABILlTY 15

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'I DEVO5RUE -- techno and profcsslonal servlcc's KEY HPCS SYSTEM FEATURES DEDICATED, FULLY INDEPENDENT AND SELF CONTAINED, SAFE SHUTDOWN SYSTEM INDEPENDENT OF DIVISIONS I AND II SYSTEMS'ORMAL AND EMERGENCY ON-SITE POWER SOURCES PLANT SERVICE AIR RESIDUAL HEAT REMOVAL SYSTEM OPERATES AUTOMATICALLYON HIGH DRYWELL PRESSURE AND LOW REACTOR WATER LEVEI HIGH AVAILABILITY-SYSTEM CAN BE TESTED ON-LINE SAFETY CHARACTERISTICS GO WELL BEYOND ORDINARY ALTERNATE AC SYSTEMS 16

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DEVONRUE tcchnol and professional sc'rvlccs NUMARC 87-00 APPENDIX B CRITERIA ITEM 'I ALTERNATE AC POWER SOURCE CRITERIA ITEM 2 CONNECTABILITYTO AC POWER SYSTEMS ITEM 3 MINIMALPOTENTIAL FOR COMMON CAUSE FAILURE ITEM 4 AVAILABILITYAFTER ONSET OF STATION BLACKOUT ITEM 5 CAPACITY AND RELIABILITY 17

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'EVONRUE -- tcchnol and profess jonal servlccs HPCS VS NUMARC 87-00 APPENDIX B CRITERIA ITEM 1

ALTERNATE AC POWER SOURCE CRITERIA HPCS SYSTEM FULLY ENCLOSED HPCS SYSTEM PHYSICALLY AND ELECTRICALLY INDEPENDENT FROM OTHER SAFETY SYSTEMS 18

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HPCS VS NUMARC 87-00 APPENDIX B CRITERIA ITEM 2 CONNECTABILITYTO AC POWER SYSTEMS HPCS ELECTRICAL SYSTEM IS INDEPENDENT OF ALL OTHER POWER SYSTEMS FAILURE DOES NOT AFFECT OTHER CLASS 1E AC POWER SYSTEMS HPCS POWER SOURCE IS NOT NORMALLYCONNECTED TO THE PREFERRED POWER SOURCE 19

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DEVONRUE -- Ssohnol and profssslonal ssrrlsss s

s pp-=gp g> AdiF RklgTF PREFERRED OFFSTK SOURCE 4.16 KVEMERGENCY BUS 4.16 KVNORMALBUS 4.16 KVBUS LOAD SI'ANDBY CIGAR DIESEL FEEDER GENERATOR snn gxE')>.'oE,,s',n sR lan S~'sP n

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DpVOioRUE -- ssohno and profsssional ssrrisss HPCS VS NUMARC 87-00 APPENDIX B CRITERIA ITEM 3 MINIMALPOTENTIAL FOR COMMON CAUSE FAILURE HPCS DC POWER SOURCE IS COMPLETELY INDEPENDENT FROM THE UNIT'S PREFERRED AND CLASS 1E DC POWER SUPPLY ILZsnLRI HPCS SYSTEM HAS ITS OWN INDEPENDENT BATTERIES AND BATTERY CHARGERS

/TAKINj HPCS STARTS AUTOMATICALLY-NO NEED FOR MANUAL STARTING (HOWEVER, SYSTEM MAY BE STARTED MANUALLYFROM THE CONTROL ROOM)

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HPCS FUEL OIL SUPPLY IS COMPLETELY SEPARATE FROM NORMAL AND CLASS 1E SYSTEM FUEL OIL SUPPLIES P

WER P PLY HPCS POWER SUPPLY IS DIFFERENT FROM THE SITE'S EMERGENCY AC POWER SOURCE.

B EPARATI N

HPCS HAS ITS OWN CLASS 1E BUS. FAILURE OF OTHER BUSES WILL NOT CAUSE FAILURE OF HPCS BUS.

WEA~E HPCS IS LOCATED INSIDE THE PLANT STRUCTURE AND IS NOT SUSCEPTIBLE TO WEATHER RELATED COMMON CAUSE FAILURES 21

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DEVONRUE -- Scchno and profcsslonal scrriccs ALI HPCS SUPPORT SYSTEMS ARE POWERED EXCLUSIVELY BY THE HPCS POWER SUPPLY INCLUDING INSTRUMENTATION AND VENTILATION EMERGENCY OFFSITE SOURCE PREFEtuIED OFFSIDE SOURCE 4.16 KVEMERGENCY BUS 4.16 KVNORMALBUS 4.16 KV BUS MOFOR HPCS SERVICE WAVER DG OPERAS)

PUMP WATER LEG ROOM VALVES PUMP PUMP FAN DC FUEL BATIERY OIL CHARGER PUMP 22

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DEVONRUE -- scchnol and profcsslonal scrslccs Table 1: The load distribution for the Clinton Nuclear Power Station (FSAR Figure 8.3-3)

HPCS loads:

Load (Kw)

% Contribution 1) 2)

3) 4)

5) 6)

7) 8)

9) 10) 11) 12) 13) 14) 15) 16)

HPCS pump HPCS service water pump DG room fan DC battery charger Switchgear Condi. unit HPCS pump room fan Isolation transformer Regulation transformer Distribution transformers (2)

HPCS water leg pump Switchgear fan DG oil mom exhaust fan SW room fan DG fuel oil transfer pump HPCS DG lube oil pump Other loads 1838 56 54 17 14 75.9 2.31 2.23 0.70 0.58 0.37 0.33 0.25 0.25 0.21 0.17 0.12 0.08 0.04 0.04 0.25 Total Loads Diesel rating at 200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> 2031 83.8

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DEVONRZJE -- lcchaol aad profcssloaal scrrlccs Table 2: The load distribution for the Washington Public Power Supply System Unit 2 (FSAR Table 8.3-3)

HPCS loads:

Load (Kw)

% Contribution I) 2)

3) 4)

5) 6)

7) 8)

9) 10 11)

HPCS pump HPCS water leg pump HPCS service water pump DG mom fan DC battery charger Auxiliarypanel Supply fans Fan coil unit Instrument and control power Lighting Miscellaneous 2380 12 36 5

5 3

3 83.5 0.42 1.75 1.50 0.18 0.84 1.26 0.18 0.18 0.11 0.11 Total Loads Diesel rating at 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> 2563 2850 90.0

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HPCS VS NUMARC 87-00 APPENDIX B CRITERIA ITEM 5 CAPABILITY AND RELIABILITY

~ET~N HPCS DIESEL GENERATOR MAY BE TESTED DURING PLANT OPERATION AS DESIRED MAIN NAN MAINTENANCEOF THE HPCS SYSTEM IS PERFORMED ACCORDiNG TO MANUFACTURER RECOMMENDATIONS

~TARTIN THE HPCS SYSTEM IS AVAILABLEAUTOMATICALLYWITHIN TEN MINUTES OF A STATION BLACKOUT OR MAY BE STARTED MANUALLY FROM THE CONTROL ROOM RELIABILIT HPCS SYSTEM RELIABILITYCAN BE MAINTAINEDAT OR ABOVE 95/o AS DETERMINED IN ACCORDANCE WITH THE NSAC-108 METHODOLOGY

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SUMMARY

OVERALL DESCRIPTION OF HPCS KEY HPCS SYSTEM FEATURES -~ DEDICATED, FULLY INDEPENDENT AND SELF CONTAINED, SAFE SHUTDOWN SYSTEM REVIEWED NUMARC 87-00 APPENDIX B CRITERIA HPCS SYSTEM EXCEEDS APPENDIX B CRITERIA NUMARC 87-00 APPENDIX C ALTERNATE AC CONFIGURATION 27

no QEVONRUE -- tsohnoloend profssslonnl tsrvlsss

SUMMARY

OVERALL DESCRIPTION OF HPCS KEY HPCS SYSTEM FEATURES -~ DEDICATED, FULLY INDEPENDENT AND SELF CONTAINED, SAFE SHUTDOWN SYSTEM REVIEWED NUMARC 87-00 APPENDIX B CRITERIA HPCS SYSTEM EXCEEDS APPENDIX B CRITERIA NUMARC 87-00 APPENDIX C ALTERNATE AC CONFIGURATION 27

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Enclosure I is a list of all meeting attendees.

Signed by Enclosures As stated cc w/enclosures:

See next page Peter S.

Tam, Senior Project t1anager Project Directorate I-4 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation DISTRIBUTION with enclosure oc et s

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