ML17037C779

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Nine Mile Point, Unit 2 - 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;AO-Air operated MO-Motor operated SO-Solenoid operated.RHR-Residual Heat Removal System LPCI-Low Pressure Coolant Injection System RCIC-Reactor Core Isolation Cooling System LPCS-Low Pressure Core Spray System HPCS-High Pressure Core Spray System~inal Dtt D~t'eactor vessel low water level (A scram will occur at this level also This i.s the higher of the two low water level signal)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.)High radiation-main steam line Line break-main steam line (high steam flow)Line break-main steam line (steam line high space temperature)

High dry well pressure Reactor vessel low water level or high dry well pressure (core standby cooling systems will be started.)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)N Line break in residual heat removal system shutdown and head cooling (high space temperature)

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