ML20140B488
| ML20140B488 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 01/17/1986 |
| From: | ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20140B485 | List: |
| References | |
| NUDOCS 8601270027 | |
| Download: ML20140B488 (2) | |
Text
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3.5.3 Safety Features Actuation System Setpoints Applicability This specification applies to the safety features actuation system actuation setpoints.
Objective To provide for automatic initiation of the safety features actuation system in the event of a breach of reactor coolant system integrity.
Specification The safety features actuation setpoints and permissible bypasses shall be as follows:
Functional Unit Action Setpoint High Reactor Building Reactor Building Spray
$30 psig (44.7 psia)
Pressure
- High Pressure Injection 54 psig (18.7 psia)
Start of Reactor Building Cooling and Reactor Building Isolation 54 psig (18.7 psia)
Reactor Bldg. Ventilation 54 psig (18.7 psia)
Low Pressure Injection 54 psig (18.7 psia)
Penetration Room Ventilation 54 psig (18.7 psia)
Low Reactor Coolant High Pressure Injection 21526 psig System Pressure **
Low Pressure Injection 21526 psig Start of Reactor Building Cooling and Reactor Building Isolation 21526 psig l
- May be bypassed during reactor building leak rate test.
- May be bypassed below 1750 psig and is automatically reinstated above 1750 psig.
With the safety features actuation setpoints less conservative than the above values, declare the channel inoperable and apply the applicable Action requirements of Table 3.5.1-1 until the channel is restored to OPERABLE status with the trip setpoint adjusted consistent with the trip setpoint value.
A Amendment No. 49,57 49 860127CH)27 860117 i
PDR ADOCK 05000313 P
l s
Bases High Reactor Building Pressure The basis for the 30 psig and 4 psig setpoints for the high pressure signal is to establish a setting which would be reached in adequate time in the event of a DBA, cover.a spectrum of break sizes and yet be far enough above normal operation maximum internal pressure to prevent spurious initiation.
Low Reactor Coolant System Pressure The basis for the 1526 psig low reactor coolant pressure setpoint for high l
and low pressure injection initiation is to establish a value which is high enough such that protection is provided for the entire spectrum of break sizes and is far enough below normal operating pressure to prevent spurious initiation. (1)
REFERENCE (1) FSAR, Section 14.2.2.5 l
(2) B&W Calculation 32-1158581 Amendment No. 49 50