ML17037C779

From kanterella
Jump to navigation Jump to search
Table 7.2-1 Isolation Signal Codes(Cont'D) 6 of 6
ML17037C779
Person / Time
Site: Nine Mile Point Constellation icon.png
Issue date: 02/06/2017
From:
Niagara Mohawk Power Corp
To:
Office of Nuclear Reactor Regulation
References
Download: ML17037C779 (1)


Text

NMPNS-2 TABLE 7.2-1 (CONT'D)

LATI S DES 1$ . Abbreviations used in table; ~inal will occur at this level D~t'eactor AO Air operated vessel low water level (A scram also This i.s the higher of the two low water level signal )

MO Motor operated Reactor vessel low water level - (The reactor core isolation cooling system will be initiated at this level also. This is the lower of the two low water level signals.)

SO Solenoid operated.

High radiation - main steam line RHR - Residual Heat Removal System Dtt Line break main steam line (high steam flow)

LPCI Low Pressure Coolant Injection System Line break main steam line (steam line high space temperature)

RCIC - Reactor Core Isolation Cooling System High dry well pressure LPCS Low Pressure Core Spray System Reactor vessel low water level or high dry well pressure (core standby cooling systems will be started.)

HPCS High Pressure Core Spray System High reactor water level in startup mode Line break in cleanup system high space temperature; high differential flow Line break in reactor core isolation coolinz system steam line to turbine (high steam line space temperature, high steam flow, or low steam line pressure)

Line break in residual heat removal system shutdown and head cooling (high space temperature)

N Reactor high water level p+ Low main steam line pressure at inlet to turbine (RUN mode only)

R Low condenser vacuum S Low dry well pressure U High reactor vessel pressure close residual heat removal shutdown cooling valves and head cooling valves High temperature at outlet of'leanup system nonregenerative heat exchanger, high differential flow, high area temperatureS Standby liquid control system actuated High radiation, reactor building ventilation exhaust Remote manual switch from control room. (All regular Group A and Group B isolation valves will be capable of remote manual operation from the contxol room.)

These are the isolation functions of the primary containment and reactor vessel isolation control system; other functions are given for informs,tion only.

6of6