ML23241A556

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7 to Updated Final Safety Analysis Report, Chapter 3, Figure 3.2-22, Drawing 102022, Sheet 4, Rev. 56, Turbine and Generator Associated Systems
ML23241A556
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 05/25/2023
From:
Pacific Gas & Electric Co
To:
Office of Nuclear Reactor Regulation
Shared Package
ML23241A052 List: ... further results
References
DCL-23-044
Download: ML23241A556 (1)
v • d • e


Text

40 41 42 43 44 45 46 47 48 49 SEE NO TE I--........._ NO TE S: LEGEND A I R SID E SEA L OJ L - ~ ~ - - - -, - - - - - - ~ - - - - - - -

PRESSURE GAUGE I. ~x~R~~~~ n~~Llr~6~ si~~ ~~A~og1~s6t 1NG -{><}- VA L VE (NORMALLY OPEN J PRESSURE GAUGE RANGE O TO 160 PSIG 2. VA L VE (NORMALLY CLOSED J ~ THERMOMETER PI -2 HYDROG EN INNE R- COO LED 145 " THICK VA L VE (NORMALLY THROTTLED) ~::-- ELECTRICAL CONNECT I ON TURBINE GENERATO R MA I N B E A R ! N G - - - - - - 1 - - - -MA I N OIL FEED BEARING

~

CHECK VAL VE [Q] PRESSURE SWITCH E OI L FEED

<I[QIID REL IEF VAL V E E

- - - SEE NOTE I ORIFICE SOLENOID VALVE MA I N BEARING---~----_

AIR SIDE~

01 L IN L ET \

HYDROG EN SEAL

  • - 297 1 OI L ALARMS COMB I NED BEARING OIL AND AI R SIDE SEAL OIL DRAIN -- FROM GEN BRG 01 L IT2J DEFOAM I NG TANK L EVE L- HIGH ORA I N LOOP SEAL [ill AIR S I DE SEAL OIL PUMP-OFF

" DEFOAM I NG TANK LE VE L HI GH" ALARM LS - 2 __________....- @] SEAL OI L PRESSURE- LOW

<KfilD [!] HYDROGEN SI DE LE VEL-L OW LS-3A/3B HJGH/LOW LEVEL SWITCH COMB I NED OEFOAM I NG TANK----

DRA I N AND GAS PRESSURE

<KillD

[8J

[fil SEAL OI L TURBINE BACKUP PRESSURE-LOW HY DROG EN S I DE SEAL OI L PUMP - OFF SENS I NG L I NE

[ill A I R S I DE SEAL OIL BACKUP PUMP -R UNN I NG D D CON DE NSED OP ERAT I NG INS TR UCTI ONS SEE INSTRUCTION BOOK FOR COMPLETE OPERATING INSTRUCT I ONS GENERA L -SEA L OI L PRESS URE MUST BE MAINT A INED AT THE HYDROG EN SEAL S WHEN HYDROGEN I S I N TH E GENERATOR OR WHEN THE SHA FT IS TURNING .

THE HYDROGEN PRESSURE MAY BE VARIED UP TO 75 PS I G. SEAL OIL PRESSURE IS NORMAL L Y MA I NTAINED AT 12 PSI ABOVE THE HYDROGEN PRESSURE . 3 PS] I S REQ U I RED TO MAINTAIN A SEAL WHEN RUNNING .

THE VAPOR EXTRACTORS SHOULD BE OPERATED CONTINUO USLY WHEN THE GENERATOR IS FILLED WI TH HYDROGEN.

HYDROGEN SHOUL D BE PUR GED FROM THE GENERATO R BEFORE MA I N OIL RESERVOIR rs DRAINED.

C THE GENERATOR CAN BE OPERATED WI TH THE HYDROGEN S I DE SEAL OIL PUMP OFF .

C DUPLEX FI L TERS PROV I DE FOR ON-LINE FI L TER ELEMEN T REPLACEMENT .

REF ER TO INSTRUCTION MAN UAL DC -663 280 - 41 SEA L OIL SUPPLY-EMERGENCY SOURCES MAIN O I L PUMP ON TURBIN E SHAFT~

SE AL O IL BACK UP PUMP WIL L MA I NTA I N 75 PSlG ON MAIN OIL RESERVIOR HYDROGEN PRESSURE AIR SIDE SEAL OI L BACKUP PUMP TURNING GEAR BEAR I NG OIL PUMPS WI LL MA I NTA I N 2 PS IG HYDROGEN PRESSURE THE TURBINE BACKUP REG ULATOR VALVE 264 OPENS WHEN THE DIFFEREN-T I AL PR ESSURE AT THE SEALS DECR EASES TO 8 PSI. THEN I F TH E SEAL D IF FERENTIA L PRESS URE DECREAS ES TO 5 PS!, PRESS URE SW I TCH [TI)

ACTIVATES THE AIR S I DE SEAL OIL BACKUP PUMP ON THE SEAL OI L B UNIT AND THE DIFFERENTIAL PRESSURE IS RESTORED TO 12 PSI. B TH E NEXT SO URC ES OF EMERGENCY OI L AFTER THE A I R SID E SE AL OI L PUMP AR E THE TURNING GEAR BEAR I NG OI L PUMP S ON THE MAIN OIL RESERV I OR. THESE CAN MAINTAIN A PRESSURE OF 2 PSIG ONLY . WHEN THE A I R SIDE SEAL OI L IS RUN-HYDROGEN PRESSURE SHOULD BE REDUCED TO 2 PS I G I F THE SEAL PUM P ON THE RESERVIOR IS NOT AVA I LA BLE .

TO PLACE EQUIPMENT I N OPERA T ION-SET VALVES AS IND I CA TED. START AIR SIDE SEAL OIL PUMP AND FILL OEFOAMJNG TANKS AND HYDROGEN

~

0 SIDE DRAIN REGULATOR. STAR T HYDROGEN SIDE SEAL O I L PUMP. EQUIP-N MENT IS THEN IN NORMAL OPERATION .

UN I T A DIABL O CA NYO N POWER PLANT - PG& E CO.

TURBI NE AN D GENERA TOR ASSOCIATED SYSTEMS

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