ML20268A849

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5 to Updated Final Safety Analysis Report, Chapter 3, Drawing 495842, Rev. 3, Functional Logic Diagram Reactor Trip Signals
ML20268A849
Person / Time
Site: Diablo Canyon  
Issue date: 06/30/2020
From:
Pacific Gas & Electric Co
To:
Office of Nuclear Reactor Regulation
Shared Package
ML20268B299 List: ... further results
References
DCL-20-075
Download: ML20268A849 (1)
v • d • e


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SEISMIC TRIP SIGNAL l SHEET 18 I MANUAL TRIP SIGNAL [SHEET 31 NEUTRON FLUX TRIP SIGNALS

[SHEET 31 PRIMARY COOLANT SYSTEM TRIP SIGNALS I SHEET 51 PRESSURIZER TRIP SIGNALS

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5 TRAIN A REACTOR SHUNT TRIP SIGNALS MANUAL REACTOR TRIP SIGNAL [SHEET 3l------t,~

MANUAL SAFETY INJECTION SIGNAL [SHEET 81 ----r, LOGIC TRAIN A REACTOR TRIP SIGNALS SOURCE RANGE, HIGH FLUX ( INTERLOCKED BY P-6 & P-10-----------------------------1 INTERMEDIATE RANGE, HIGH FLUX I INTERLOCKED BY P-101 --------------------------~

'HIGH FLUX, LOW SETPOINT I INTERLOCKED BY P-IOJ ------------------------i POWER RANGE HIGH FLUX, HIGH SETPOINT---------------------------------1

, HIGH FLUX RATE ---------------------------------------1

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UNDERVOLTAGE I INTERLOCKED BY P-71---------------------------------..il'-._..,,

,UNDERFREOUENCY ( INTERLOCKED BY P-71----------------------------------~

HIGH PRESSURE------------------------------------------~

LOW PRESSURE I INTERLOCK ED BY P-7 l ----------------------------------..i

,HIGH LEVEL ( INTERLOCKED BY P-71 STEAM GENERATOR TRIP SJGNAL [SHEET 7:l--;-L:O~W~-~L~O~W-:::-S~T~EA~M:-;--G::::-EN~E:R~A~T:0:R::-:W~A~T~E~R::-:L~E~V~E~L---_-_-:._-:._-:._-:_-:_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_--:._-_-_-_-_-_-_-_-_-_-_-_-_-_-_-:_-_-_-_-_-_-_-_-_-_-_-_-:_--:._-:._~--:_-:_-:_-:_-_-_-_-_-_-_-_-_-_-~~

SAFETY INJECTION SIGNAL [SHEET 81 AUTOMATIC SIGNAL---------------------------------------------1 TURBINE TRIP SIGNAL I SHEET 161 LOW AUTO STOP OIL PRESSURE OR ALL STOP VALVES CLOSED [ INTERLOCKED BY P-91-----------------t MANUAL TRIP SIGNAL !SHEET 31 NEUTRON FLUX TRIP SIGNALS I SHEET 3 I LOGIC TRAIN B REACTOR TRIP SIGNALS

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UNDERVOLTAGE l INTERLOCKEO BY P-71----------------------------------..i UNDERFREOUENCY I INTERLOCKED BY P-7)---------------------------------1

'HIGH PRESSURE-------------------------------------------------l LOW PRESSURE I INTERLOCKED BY P - 7 I ----------------------------------..!

HIGH LEVEL ( INTERLOCKED BY P-7)

LOW-LOW STEAM GENERATOR WATER LEVEL----------------------------------~

AUTOMATIC SIGNAL--------------------------------------------1 LOW AUTO STOP OIL PRESSURE OR ALL STOP VALVES CLOSED ( INTERLOCKED BY P-91-----------------+I TRAIN B REACTOR SHUNT TRIP SIGNALS MANUAL REACTOR TRIP SIGNAL I SHEET 3) -------1/

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LOGIC TRAIN B NOTES REGISTERED ENGfNEEA I. TRIPPING EITHER REACTOR TRIP BREAKER 52/RTA OR 52/RTB REDUNDANTLY DE-ENERGIZES THE ROD DRIVES. ALL FULL LENGTH CONTROL RODS AND SHUTDOWN ROOS ARE THEREBY RELEASED FOR GRAVITY INSERTION INTO THE REACTOR CORE.

2. NORMAL REACTOR OPERATION IS TO BE WITH REACTOR TRIP BREAKERS 52/RTA AND 52/RTB IN SERVICE AND BYPASS BREAKERS 52/BYA AND 52/BYB WITHDRAWN.

DURING TEST, ONE BYPASS B~EAKER JS TO BE PUT IN SERVICE AND THEN THE RESPECTIVE REACTOR TRIP B,EAKER rs OPERATED USING A SIMULATED REACTOR TRIP SIGNAL IN THE TRAIN UNDER TEST. THE REACTOR WILL NOT BE TRIPPED BY THE SIMULATED SIGNAL SINCE THE BYPASS BREAKER IS CONTROLLED FROM THE OTHER TRAIN. ONLY ONE REACTOR T~IP BREAKER IS TO BE TESTED AT A TIME.

3. ALL CIRCUITS ON THIS SHEET ARE NOT REDUNDANT BECAUSE BOTH TRAINS ARE SHOWN.
4. OPEN/CLOSED INDICATION FOR EACH TRIP BREAKER AND EACH BYPASS BREAKER IN CONTROL ROOM.
5. SHEET NUMBERS REFER TO THE REFERENCE NUMBERS BELOW.
6. WHENEVER A PROCESS SIGNAL IS USED FOR CONTROL AND IS DERIVED FROM A PROTECTION
CHANNEL, ISOLATION MUST BE PROVIDED.
7. THIS DRAWING ILLUSTRATES THE FUNCTIONAL REQUIREMENTS OF THE REACTOR CONTROL AND PROTECTION SYSTEM. THIS DRAWING DOES NOT REPRESENT ACTUAL HARDWARE IMPLEMENTATION. FOR HARDWARE IMPLEMENTATJON, REFER TO THE APPLICABLE SCHEMATIC DIAGRAMISI.

REFERENCES WE DWG PG&E DWG I. FUNCTIONAL LOGIC DIAGRAM INDEX ANO SYMBOLS ____________________________________ 5653074-I ______ 495841

2. FUNCTIONAL LOGIC DIAGRAM REACTOR TRIP SIGflALS _________________________________ 5653D74-2 ______ 495842
3. FUNCTIONAL LOGIC DIAGRAM NUCLEAR INSTR AND MANUAL TRIP SIGNALS __________________ 5653D74-3 ______ 495843
4. FUNCTIONAL LOGIC DIAGRAM NUCLEAR INSTR PERMISSIVES AND BLOCKS ___________________ 5653D74-4 ______ 495844
5. FUNCT!ONAL LOGIC DIAGRAM PRIMARY COOLANT SYSTEM TRIP SIGNALS ____________________ 5653D74-5 ______ 495845
6. FUNCTIONAL LOGIC DIAGRAM PRESSURIZER TRIP SIGNALS ______________________________ 5653D74-6 ______ 495846
7. FUNCTIONAL LOGIC DIAGRAM STEA~ GENERATOR TRIP SIGNALS __________________________ 5653074-7 ______ 495847
8. FUNCTIONAL LOGIC DIAGRAM SAFEGUARDS ACTUATION SIGNALS __________________________ 5653D74-8 ______ 495848
9. FUNCTIONAL LOGIC DIAGRAM ROD CONTROLS AND ROD BLOCKS ___________________________ 5653D74-9 ______ 495849
10. FUNCTIONAL LOGIC DIAGRAM STEAM DUMP CONTROL ___________________________________ 5653D74-IO _____ 495850 Ii. FUNCTIONAL LOGIC DIAGRAM PRESSURIZER PRESSURE AND LEVEL CONTROL _________________ 5653074-1 I _____ 495851
12. FUNCTIONAL LOGIC DIAGRAM PRESSURIZER HEATER CONTROL ____________________________ 5653D74-12 _____ 495852
13. FUNCTIONAL LOGIC DIAGRAM FEEDWATER CONTROL AND ISOLATION _______________________ 5653D74-13 _____ 495853
14. FUNCTIONAL LOGIC DIAGRAM FEEDWATER CONTROL AND ISOLATION. _______________________ 5653074-14 _____ 495854
15. FUNCTIONAL LOGIC DIAGRAM AUXILIARY FEEOWATER PUMPS STARTUP _____________________ 5653D74-15 _____ 495855
16. FUNCTIONAL LOGIC DIAGRAM TURBINE TRIPS, RUNBACKS & SIGNALS _____________________ 5653D74-16 _____ 495856
17. FUNCTIONAL LOGIC DIAGRAM AMSAC SIGNALS ________________________________________ 5653D74-l 7 _____ 495857
18. FUNCTIONAL LOGIC DIAGRAM SEISMIC TRIP ________________________________________ 8759D77 ________ 495858
19. FUNCTIONAL LOGIC DIAGRAM DIGITAL FW CONT SYS INPUT SIGNAL VALIDATION ____________ 5653D74-18 _____ 495859 20, FUNCTIONAL LOGIC DIAGRAM DIGITAL FW CONT SYS FW FLOW CONTROLLER & Cv DEMAND ______ 5653D74-19 _____ 495860
21. FUNCTIONAL LOGIC DIAGRAM DIGITAL FW CONT SYS CONT VCV SEQ & TRACKING LOGIC _______ 5653D74-2Q _____ 495861
22. FUNCTIONAL LOGIC DIAGRAM DIGITAL FW CONT SYS SIGNAL SELECTOR LOGIC ______________ 5653074-21 _____ 495862
23. FUNCTION DIAGRAM REACTOR-TURBINE-GENERATOR PROTECTION _________________________________________ 500825
24. SCHEMATIC DIAGRAM REACTOR TRIP BREAKERS ______________________________________________________ 437610 S[GNATURE a

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DATE DESCRIPTION GM/SPEC OWN CHl<.D SUPV APVD BY R E V I S I O N S R E V I S I O N S R E V I S I O N S SHEETS 495842 REV 3

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