ML20063G335
| ML20063G335 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 02/10/1994 |
| From: | UNION ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML20063G327 | List: |
| References | |
| NUDOCS 9402160024 | |
| Download: ML20063G335 (5) | |
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@Q TABLE 2.2-1 (Continued)
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REACTOR TRIP SYSTEH INSTRUMENTATION TRIP SETPOINTS 88 G
- * *ji nu SENSOR TOTAL ERROR gj '
FUNCTIONAL UNIT ALLOWANCE (TA)
Z (S)
TRIP SETPOINT ALLOWABLE VALUE OO ;z:
v8M M 13.
Steam Generator Water g3o _,
level Low-tow (Continued) u c.
Vessel AT Equivalent
> 20% RTP UDN Coincident with Steam Generator Water 20.2 17.58 2.0
> 20.2% of Narrow
> 18.4% of Narrow
'?
Level Low-Low (Adverse Ifange Instrument Range Instrument R
Containment Environment)
Span Span E
and Containment Pressure -
2.8 0.71 2.0
~< 1.5 psig
~< 2.0 psig Environmental Allowance Modifier.
F OR l
Steam Generator Water 14.8 12.10 2.0
> 14.8% of Harrow
> 13.0% of Narrow i
y
- Level Low-low (Nonnal Range Instrument Range Instrument Containment Environment)
Span Span E
- 14. Undervoltage -Reactor
-7 +
1.33 0
O Coolant Pumps 37.7
~~> 10584 Volts A.C.
~> M&Sfr Vol ts A.C.
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- 15. Underfrequency - Reactor.
3.3-
'O O
> 57.2 liz
> 57.1 Itz Coolant Pu.nps
- -. ~.
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LIMITING SAFETY SYSTEM SETTINGS 1
BASES Undervoltage and Underfrequency - Reactor Coolant Pumo Busses (Continued).
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for a signal to reach the Reactor trip breakers following the simultaneous trip of two or more reactor coolant pump bus circuit breakers shall not exceed 1.2 e
seconds.
For underfrequency, the delay is set so that the time required for a signal to reach the Reactor trip breakers after the Underfrequency Trip Setpoint.
is reached shall not exceed 0.3 second. On decreasing power the Undervoltage and Underfrequency Reactor Coolant Pump Bus trips are automatically blocked by P-7 (a power level of approximately 10% of RATED THERMAL POWER with a turbine impulse chamber pressure at approximately 10% of full power equivalent); and on increasing power, reinstated automatically by P-7. _TNMET' A Turbine Trip, A Turbine trip initiates a Reactor trip. On decreasing power the Reactor trip from the Turbin'e trip is automatically blocked by P-9 (a power level! of approximately 50% of PATED THERMAL POWER); and on increasing power, reinstated automatically by P-9.
Safety Injection Input from ESF I
If a Reactor trip has not already been generated by the Reactor Trip System 4
instrumentation, the ESF automatic actuation logic. channels will initiate a Reactor trip upon any signal which initiates a Safety Injection. The ESF' instrumentation channels which initiate a Safety Injection signal are shown in Tabl e. 3. 3-3.
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I CALLAWAY - UNIT 1 B 2-7(a)
Amendment No. 43
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The Total' Allowance and Z values for the RCP Undervoltage trip function are based-on percent of the undervoltage relay span-while the Trip Setpoint and Allowable Value are: based on voltages on the 13.8 kV, PA system busses powering the RCP motors.
The undervoltage relay span is 30 volts, from 70 to 100 VAC.
Potential transformers PA03 and PA06'have a ratio of 120:1-(14,400V to 120V); therefore, the Trip Setpoint of 10,584 VAC on-the PA bus corresponds to 88.2 VAC at the undervoltage relay.
'Likewise, the Allowable Value of.10,105 VAC on the PA bus corresponds to 84.2 VAC at the undervoltage relay.
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-t TABLE 2.2-1 (Continued)
S REACTOR TRIP SYSTEM INSTRUMENTATION TRIP SETPOINTS E
($
SENSOR k
TOTAL ERROR
't-FUNCTIONAL UNIT ALLOWANCE (TA)
Z (S)
TRIP SETPOINT ALLOWABLE VALUE.
c:3
- 13. Steam Generator Water Level N
Low-Low (Continued) w c.
Vessel AT Equivalent > 20%
RTP Coincident with 7
Steam Generator Water Level 20.2 17.58 2.0 2 20.2% of Narrow 218.4% of Narrow I
' Low-Low (Adverse Range Instrument Range Instrument E
Containment Environment)
Span Span
.and Containment Pressure -
2.8 0.71 2.0 s 1.5 psig s 2.0 psig Environmental Allowance.
Modifier OR~
Steam Generator Water Level 14.8 12.18 2.0 214.8% of Narrow 213.0% of Narrow Low-Low (Normal Range Instrument Range Instrument
- Containment Environment)
Span Span
- 14. Undervoltage - Reactor Coolant 33.3
'1.33 0
210584 Volts A.C.
2 10105 Volts A.C.
rt
- Pumps 2:
- 15. Underfrequency - Reactor Coolant 3.3 0
0 2 57.2 Hz.
2 57.1 Hz Pumps.
&w
A N
LIMITING SAFETY SYSTEM SETTINGS BASES' Undervoltace and Underfrecuency - Reactor Coolant Pumo Busses (Continued)-
for a signal to reach the Reactor trip breakers following the simultaneous trip of two or -
{
more reactor coolant pump bus circuit breakers shall not exceed 1.2 seconds. For underfrequency, the delay is set so that the time required for a signal to reach tho' Reactor trip breakers after the Underfrequency Trip Setpoint is reached shall not exceed 0.3 second. On decreasing power the Undervoltage and Underfrequency Reactor Coolant Pump Bus trips are automatically blocked by P-7 (a power level of approximately 10% of RATED THERMAL POWER with a turbine impulse chamber pressure at approximately 10% of full power equivalent); and on increasing power, -
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reinstated automatically by P-7. The Total Allowance and Z values for the RCP '
Undervoltage trip function are based on percent of the undervoltage relay span while the Trip Setpoint and Allowable Value are based on voltages on the 13.8 kV, PA system busses powering the RCP motors. The undervoltage relay span is 30 volts, from 70 to 100 VAC. Potential transformers PA03 through PA06 have a ratio of 120:1 (14,400V to 120V); therefore, the Trip Setpoint of 10,584 VAC on the PA bus corresponds to 88.2 VAC at the undervoltage relay. Likewise, the Allowable Value of 10,105 VAC on the PA bus corresponds to 84.2 VAC at the undervoltage relay.
Turbine Trio s
A Turbine trip initiates a Reactor trip. On decreasing power the Reactor trip from the Turbine trip is automatically blocked by P-9 (a' power level of approximately 50%
of RATED THERMAL POWER); and on increasing power, reinstated automatically by P-9.
_ Safety Iniection input from ESF -
if a Reactor trip has not already been generated by the Reactor Trip System instrumentation, the ESF automatic actuation logic channels will initiate a Reactor trip
. upon any signal which initiates a Safety injection. The ESF instrumentation channels which initiate a Safety injection signal are shown in Table 3.3-3.
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CALLAWAY - UNIT 1 B 2-7(a)
Amendment No. 43
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