ML20024H870
| ML20024H870 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 08/20/1993 |
| From: | PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | |
| Shared Package | |
| ML20024H869 | List: |
| References | |
| NUDOCS 9308270051 | |
| Download: ML20024H870 (5) | |
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Unit 2
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PBRPS 1.0 DEFINITIONS (Cont'd)
(a)
Initiatino - A logic that receives signals from channels and produces decision outputs to the actuation logic.
(b) Actuation - A logic that receives signals (either from initiation logic or channels) and produces decision outputs to accomplish a protective action.
Loaic System Functional Test - A Logic System Functional Test shall be a test of all logic components, i.e., all relays and contacts, all trip units, solid state logic elements etc., of a logic circuit, from sensor through and including the actuated device, to verify Operability. The Logic System Functional Test may be performed by any series of sequential, overlapping or total system steps such that the entire logic system is tested.
Low (power) Trio Set Point (LTSP) - The low power trip setpoint associated with the Rod Block Monitor (RBM) rod block trip setting applicable between 30% and 65% reactor thermal power.
MAPFAC(F) (MAPLHGR Flow Factor) - A core flow dependent multiplication factor used to flow bias the standard Maximum Average Planar Linear Heat Generation Rate (MAPLHGR) limit.
MAPFAC(P) (Power Dependent MAPLHGR Multiplier) - A core power dependent multiplication factor used to power bias the rtandard Maximum Average Planar Linear Heat Generation Rate (MAPLHGR) limit.
g MEMBERS OF THE PUBLIC - Members of the public shall include all persons who are not occupationally associated with the plant.
. This category does not include employees of the utility, its contractors, or vendors. Also excluded from this category are persons who enter the site to service equipment or to make deliveries. This category does include persons who use portions of the site for recreational, occupational, or other purposes not associated with the plant.
Minimum Critical Power Ratio (MCPR) - The minimum in-core critical power ratio corresponding to the most limiting fuel assembly in the core. Associated with the minimum critical power ratio is a core flow dependent (MCPR(F)) and core power dependent (MCPR(P)) minimum critical power ratio.
Mode of Operation - A rea.; tor mode switch selects the proper interlocks for the operational status of the unit. The following are the modes and interlocks provided: Refuel Mode, Run Mode, i
Shutdown Mode, Startup/ Hot Standby Mode.
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l i 9308270051 930820 D
M[M PDR ADOCK 05000277 P
Unit 3 PBAPS 1.0 DEFINITIONS (Cont'd)
(a) Initiatina - A logic that receives signals from channels and produces decision outputs to the actuation logic.
f (b) Actuation - A logic that receives signals (either from I
initiation logic or channels) and produces decision outputs I
to accomplish a protective action.
Loaic System Functional Test - A Logic System Functional Test j
shall be a test of all logic components, i.e., all relays and contacts, all trip units, solid state logic elements etc., of a logic circuit, from sensor through and including the actuated device, to verify Operability. The Logic System Functional Test may be performed by any series of sequential, overlapping or total system steps such that the entire logic system is tested.
Low (power) Trio Set Point (LTSP) - The low power trip setpoint associated with the Rod Block Monitor (RBM) rod block trip setting applicable between 30% and 65% reactor thermal power.
MAPFAC(F) (MAPLHGR Flow Factor) - A core flow dependent multiplication factor used to flow bias the standard Maximum Average Planar Linear Heat Generation Rate (MAPLHGR) limit.
MAPFAC(P) (Power Dependent MAPLHGR Multiplier) - A core power dependent multiplication factor used to power bias the standard Maximum Average Planar Linear Heat Generation Rate (MAPLHGR)-
i limit.
MEMBERS OF THE PUBLIC - Members of the public shall include all persons who are not occupationally associated with the plant.
. This category does not include employees of the utility, its contractors, or vendors.
Also excluded from this category are persons who er'.ar the site to service equipment or to make deliveries. This category does include persons who use portions of the site for recreational, occupational, or other purposes not associated with the plant.
l Minimum Critical Power Ratio (MCPR) - The minimum in-core critical power ratio corresponding to the most limiting fuel assembly in the core. Associated with the minimum critical
)
power ratio is a core flow dependent (MCPR(F)) and core power dependent (MCPR(P)) minimum critical power ratio.
Mode of Operation - A reactor mode switch selects the proper i
interlocks for the operational status of the unit. The following are the modes and interlocks provided: Refuel Mode, Run Mode, Shutdown Mode, Startup/ Hot Standby Mode.
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f Unit 3
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PBAPS j
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SAFETY LIMIT LIMITING SAFETY SYSTEM SETTING l
1.1 FUEL CLADDING INTEGRITY 2.1 FUEL CLADDING INTEGRITY l
Applicability:
Aoolicability:
The Safety Limits established The Limiting Safety System Settings to preserve the fuel cladding apply to. trip settings of the integrity apply to those instruments and devices which are variables which monitor the provided to prevent the fuel fuel thermal behavior.
cladding integrity Safety Limits from being exceeded.
Ohiectives:
Ob.iectives:
The objective of the Safety l
Limits is to establish limits The objective of the Limiting Safety which assure the integrity of System Settings is to define the l
l the fuel cladding.
level of the process variables at I
which automatic protective action is-initiated to prevent the fuel cladding Specification:
integrity Safety _ Limits from being exceeded.
A. Reactor Pressure 2 800 osia and Core Flow 2 10% of Rated Specification:
The existence of a minimum The limiting safety system settings critical power ratio (MCPR) shall be as specified below:
less than 1.07 for two recirculation loop operation, A. Neutron Flux Scram or 1.08 for single loop operation, shall constitute
- 1. APRM Flux Scram Trio Settino violation of the fuel cladding (Run Mode) integrity safety limit.
When the Mode Switch is in the To ensure that this safety RUN position, the APRM flux limit is not exceeded, neutron scram trip setting shall be:
flux shall not be above the o
scram setting established in S 5 0.66W + 71% - 0.66 AW i
specification 2.1.A for longer (Clamp 9 120%)
than 1.15 seconds as indicated by the process computer. When where:
the process computer is out of service this safety limit shall S-Setting in percent of rated be assumed to be exceeded if thermal power (3293 MWt) the neutron flux exceeds its scram setting and a control W=-
Loop recirculating flow rate i
rod scram does not occur.
in percent of design.
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