ML23241A272

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7 to Updated Final Safety Analysis Report, Chapter 5, Figure 5.5-17, Drawing 500800, Sheet 1, Rev. 20, I & C Functional Diagram Reactor - Turbine - Generator Protection
ML23241A272
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: ML23241A272 (1)
v • d • e


Text

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GENERATOR TRIP IR HI NEUTRON FLUX RATE POSITIVE 2 OUT OF 4 OF ANY COMBINATION OF POS GENERATOR LOSS OF FIELD f--+--------------+-------,RATE TRIP NOT FROM THE SAME CHANNEL MAIN,3IG TURBINE 3R HI NEUTRON FLUX POWER RANGE HIGH SET POINT - 2 OUT OF 4 124RI TURBINE TRIP/TRAIN B 4R HI NEUTRON FLUX POWER RANGE LOW SET PO I NT - 2 OUT OF 4 TRAIN "B" INPUTS SIMILAR AUTOOILSTOP>-;::===:::;-~r=~~~~~~~~~-=.:r-7 I f----~

HIGH IR TO TRAIN "A" INPUTS FROM .PRESS/ BOTH 500KV 1-J -+j__ _J 5R HI NEUTRON FLUX INTERMEDIATE RANGE I OUT OF 2 NEUTRON IR TO 23R, 25R AND PERMISSIVES BKRS OPEN - - - ~ ' 6R HI NEUTRON FLUX SOURCE RANGE I OUT OF 2 FLUX RATE f - - - - - - - - - - - - - - - - - - - - - - , - 1 29G GEN FIELD POSITIVE - " IT GEN BKR CLOSED 25KV MOT.

9R STEAM GENERATOR LOW-LOW WTR LEVEL 2 OUT OF 3 PER LOOP I OUT OF 4 LOOPS

"'"-' LOW REVERSE >-----1-----i---t---i OPER SW IOR PRESSURIZER HIGH WATER LEVEL 2 OUT OF 3 WITH P-7 INTERLOCK BEARING POWER CLOSED E OIL , I IR PRESSURIZER LOW PRESSURE 2 OUT OF 4 WITH P-7 INTERLOCK 2T PRESSURE 26G 12R PRESSURIZER HIGH PRESSURE 2 OUT OF 4 THRUST GEN 13R OVER TEMPERATURE 6T 2 OUT OF 4 BEAR I NG f-----ff/~---f-+--------+i FAILURE ANTI-MOTOR I NG/1-.f-;::::::1__~'~;'1-l

/ I-- I4R OVER POWER 6 T 2 OUT OF 4 FOLD HIGH 3 R TRIP 500KV _ ._1_5_R,_P_R_E~S~SU_R_I_Z_E_R_L_O_W_L_OW_P_R_E~S~SU_R_E_ _,___ _--+-2_0U_T_O_F_4_MA_N_U_A_L~B_L_OC_K_I_NT_L_K_W_I_T_H_P_-_I_I__, "'"

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POINT f--1 i----1---__J 22R REACTOR COOLANT PP BREAKER TRIP 2/4 TRIP WITH P-7 INTERLOCK

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FLUX 7 . C, 0. V. TRANS

'6G 12KV BUS D & E 31 TURBINE SPEED 111.5%, LOW VACUUM, LOW cSV037 DEH OUTPUT SOURCE

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"- / 500KV ~"' TRANS 500KV 2G LOW AUTO STOP OIL PRESSURE 63AST3, AUTO STOP OIL PRESS.& TURB. STOP VALVES LOW BEARING GOVERNOR 0>-- PCB BKR FAILURE

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gG 500KV PCB BREAKER FAILURE 550/562BFX1 PCB SWITCH NO. 542 LEVEL "-

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SPRAY ACTUATION PHASE 11 8 11 58. 35 HZ/ 92 SEC 500KV I P -9 1------+I,, BKR CLOSED - TIME DELAY N GENERATOR LOSS OF FIELD 25KV MOT 32G 0 OPER SW - AMSAC - ATWS MITIGATION SYSTEM ACTUATION CIRCUITRY N I 124RI TURBINE TRIP/TRAIN A" TURBINE TRIP CLOSED GEN

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00 NUCLEAR SAFETY RELATED 0 c,,+-

PERMISSIVES REFERENCES DWG NO. KEY DWG. SECTION 3

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P-1 0 - 2/4 NEUTRON FLUX (POWER RANGEi ABOVE SET POINT R. E. RXG2 PROTECTION SUPS BY:

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