ML17037C779: Difference between revisions

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{{#Wiki_filter:NMPNS-2 TABLE 7.2-1 (CONT'D)LATI S DES 1$.Abbreviations used in table;AO-Air operated MO-Motor operated SO-Solenoid operated.RHR-Residual Heat Removal System LPCI-Low Pressure Coolant Injection System RCIC-Reactor Core Isolation Cooling System LPCS-Low Pressure Core Spray System HPCS-High Pressure Core Spray System~inal Dtt D~t'eactor vessel low water level (A scram will occur at this level also This i.s the higher of the two low water level signal)Reactor vessel low water level-(The reactor core isolation cooling system will be initiated at this level also.This is the lower of the two low water level signals.)High radiation-main steam line Line break-main steam line (high steam flow)Line break-main steam line (steam line high space temperature)
{{#Wiki_filter:NMPNS-2 TABLE 7.2-1 (CONT'D)
High dry well pressure Reactor vessel low water level or high dry well pressure (core standby cooling systems will be started.)High reactor water level in startup mode Line break in cleanup system-high space temperature; high differential flow Line break in reactor core isolation coolinz system steam line to turbine (high steam line space temperature, high steam flow, or low steam line pressure)N Line break in residual heat removal system shutdown and head cooling (high space temperature)
LATI   S         DES 1$ . 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 )
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}}
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)
Reactor high water level p+ Low main steam line pressure     at inlet to turbine   (RUN mode   only)
R    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}}

Latest revision as of 08:57, 30 October 2019

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.

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