ML20023C001
| ML20023C001 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 05/31/1983 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20023B998 | List: |
| References | |
| NUDOCS 8305090474 | |
| Download: ML20023C001 (2) | |
Text
Docket No. 50-245 ATTACHMENTI MILLSTONE NUCLEAR POWER STATION, UNIT NO.1 RPS POWER MONITORING SYSTEM l
May,1983 8305090474 830502 PDR ADOCK 05000245 P
pm
LIMITING CONDITION FOR OPERATION SURVEILLANCE REQUIREMENT 3.1 REACTOR PROTECTION SYSTEM 4.1 REACTOR PROTECTION SYSTEM Applicability:
Applicability:
Applies to the instrumentation and associated devices Applies to the surveillance of the instrumentation and which initiate a reactor scram and provide automatic associated devices which initiate reactor scram and isolation of the Reactor Protection System buses from their power supplies.
provide automatic isolation of the reactor protection system buses from their power supplies.
Objective:
Objective:
To assure the operability of the Reactor Protection To specify the type and frequency of surveillance to be System.
applied to the reactor protection instrumentation.
Specification:
Specification:
l A.
The setpoints, minimum number of trip systems, A.
Instrumentation systems shall be functionally tested and minimum number of instrument channels that and calibrated as indicated in Tables 4.1.1 and must be operable for each position of the reactor 4.1.2, respectively.
mode switch shall be as given.in Table 3.1.1.
l B.
Response Time Daily during reactor power operation, the peak heat B.
flux shall be checked and the APRM scram and rod The time from initiation of any channel trip to block settings given by the equations in Specifi-the de-energization of the scram solenoid relay cations 2..l.2A and 2.1.2B shall be determined.
shall not exceed 50 milliseconds.
C.
The RPS electrical protection assemblies shall be C.
Reactor Protection System Power Monitoring determined operable as follows:
Two RPS electric power monitoring channels for 1.
At least once per 6 months by performance of a each inservice RPS MG set or alternate supply CHANNEL FUNCTIONAL TEST, and shall be operable at all times except as follows:
2.t At least once per 18 months by demonstrating 1.
With one RPS electric power monitoring channel the OPERABILITY of over-voltage, under-voltage for an inservice RPS MG set or alternate power nd under-frequency protective instrumentation supply inoperable, restore the inoperable by performance of a CHANNEL CALIBRATION in-channel to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or cluding simulated automatic actuation of the remove the associated RPS MG set or alternate protective relays, tripping logic and output power supply from service.
circuit breakers and verifying the following setpoints.
2.
With both RPS electric power monitoring channels Over-voltage < (132) VAC, for an inservice RPS MG set or alternate power a.
supply inoperable, restore at least one to b.
Under-voltage _> (84) VAC, OPERABLE status within 30 minutes or remove the c.
Under-frequency > (57) Hz, and associated RPS MG set or alternate power supply from service.
d.
Time-delay { (5.0) seconds.
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