ML20062G032
| ML20062G032 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 11/20/1990 |
| From: | GENERAL PUBLIC UTILITIES CORP. |
| To: | |
| Shared Package | |
| ML20062G026 | List: |
| References | |
| NUDOCS 9011280339 | |
| Download: ML20062G032 (3) | |
Text
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t ATTACHMENT Technical Specification Change I
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TTSCR 203 9011280339 901120 PDR ADOCK 05000289 P
PDC P
3.5.3 ENGINEERED SAFEGUARDS PROTECTION SYSTEM ACTUATION SETPOINTS Applicability:
This specification applies to the engineered safeguards protection system actuation setpoints.
objective:
To provide for automatic initiation of the engineered safeguards protection system in the event of a breach of Reactor Coolant System integrity.
Specification:
3.5.3.1 The engineered safeguards protection system actuation setpoints and permissible bypasses shall be as follows:
Initiating signal Function Setpoint High Reactor Building Reactor Building Spray
< 30 psig Pressure (1)
Reactor Building Isolation R 30 psig High-Pressure Injection 3 4 psig Low-PressureInjection f 4 psig Start Reactor Building Cooling & Reactor Building Isolation f 4 psig Low Reactor Coolant High Pressure injection
> 1600(2) and System Pressure
! 500(3) psig Low Pressure injection
> 1600(2) and
[ 500(3) psig Reactor Building Isolation > 1600 psig(2) 4.16 kv E.S. Buses
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Undervoltage Relays Degraded Voltage Switch to Onsite Power-i Source and load shedding 3760 volts (4)
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Degraded voltage timer 10 sec (5) l Loss of voltage Switch to Onsite Power Source and load shedding 2400 Volts (6)
Loss of voltage timer 1.5 see (7)
(1) May be bypassed for reactor building leak rate test.
2 (2) May be bypassed below 1775 psig on decreasing pressure and is l
automatically reinstated before 1800 psig on increasing pressure.
(3) May be bypassed below 925 psig on decreasing pressure and is automatically reinstated before exceeding 950 psig on increasing 4
pressure.
3-37 Amendment No.- 70, 73, 78, 89, 149
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(4) Minimum allowed setting is 3740 v. Maximum allowed setting is 3773 v.
i (5) Minimum allowed time is 8 sec. maximum allowed time is 12 sec.
(6) Minimum allowed setting is 2200 volts, maximum allowed setting is 2860 volts (7) Minimum allowed time is 1.0 second, maximum allowed time is 2.0 seconds.
Bases i
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 LOCA, cover a spectrum of break sizes and yet be far enough above normal operation maximum internal pressures to prevent spurious initiation (Reference 1).
low Reactor Coolant System Pressure The basis for the 1600 and 500 psig low reactor coolant pressure setpoint for high and low pressure injection initiation is to establish a value which is.high enough such that protection is provided for the entire spectrum to break sizes and is far enough below normal operating pressure to prevent spurious. initiation.
Bypass of HP1 below 1775 psig and LPI below 925 psig, prevents ECCS actuation during normal system cooldown (References 1 and 2).
4.16 KV ES Bus Undervoltage Relays The basis for the degraded grid voltage relay setpoint is to protect the safety related electrical. equipment from loss of function in the event of a sustained degraded voltage condition on the offsite power system. The timer setting prevents spurious transfer to the onsite source for transient conditions.
The loss of voltage relay and timnts detect loss of offsite power condition and initiate transfer to the onsite source with minimal time delay.
The minimum and maximum allowed settings for the degraded voltage l
setpoint are based on a relay tolerance of -0.53%, +0.35% and is to I
be considered an "as-lef t" setting.
References (1)UFSAR, Table 7.1-3 (2) UFSAR, Section 14.1.2.10
" Steam Generator Tube Failure" 3-37a Amendment No. 70, 73, 78, 89, 149, 157
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