ML20210E614
| ML20210E614 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 09/11/1986 |
| From: | GENERAL PUBLIC UTILITIES CORP. |
| To: | |
| Shared Package | |
| ML20210E582 | List: |
| References | |
| NUDOCS 8609250055 | |
| Download: ML20210E614 (2) | |
Text
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4.4-1 4.4 EMERGENCY COOLING Applicability:
Applies to surveillance requirements for the emergency cooling systems.
Objective:
To verify the operability of the emergency. cooling systems.
Specification:
Surveillance of the emergency cooling systems shall be performed as follows:
Item Frequency A.
Core Spray System 1.
Pump Operability Once/ month. Also after major maintenance and prior to startup following a refueling outage.
2.
Motor operated valve operability Once/ month 3.
Automatic actuation test Every 3 months 4.
Pump compartment water-Once/ week and after each entry tight doors closed 5.
Core spray headerA P instru-mentation check Once/ day calibrate Once/3 months test Once/3 months B.
Automatic Depressurization 1.
Valve operability Following a refueling outage' 2.
Automatic actuation test Every refueling outage C.
Containment Cooling System 1.
Pump operability Once/ month.
Also, after major maintenance and prior to startup following a refueling outage.
2.
Automatic actuation test Every 3 months 3.
Pump compartment water-Once/ week and after every entry tight doors closed
- Valve operability shall be demonstrated at system operating pressure prior to exceeding 5 percent power.
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4.4-2 Item Frequency D.
Emergency Service Water System 1.
Pump operability Once/ month. Also after major maintenance and prior to startup following refueling outage.
2.
Automatic actuation test Every 3 months E.
Control Rod Drive Hydraulic System 1.
Pump operability Once/ month. Also after major maintenance and prior to startup following a refueling outage.
F.
Fire Protection System 1.
Pump and Isolation Once/ month. Also after major valve operability maintenance and prior to startup following a refueling outage.
Bases:
It is during major maintenance or repair that a system's design intent may be violated accidentally.
Therefore, a functional test is required after every major maintenance operation.
During an extended outage, such as a refueling outage, najor repair and maintenance may be performed on many systems.
To be sure that these repairs on other systems do not encroach unintentionally on critical standby cooling systems, they should be given a functional test prior to startup.
Motor operated pumps, valves and other active devices that are normally on standby should be exercised periodically to make sure that they are free to operate.
Motors on pumps should operate long enough to approach equilibrium temperature to ensure there is no overheat problem.
Whenever practical, valves should be stroked full length to ensure that nothing impedes their motion.
Engineering judgement based on experience and availability analyses of the. type presented in Appendix L of the FDSAR indicates that testing these components more often than once a month over a long period of time does not significantly improve the system reliability. Also, at this frequency of testing wearout should not be a problem through the life of the plant.
During tests of the electromatic relief valves, steam from the reactor vessel will be discharged directly to the absorption chamber pool.
Scheduling the tests in conjunction with the refueling outage permits the tests to be run at low power, prior to 5 percent power, enhancing the safety of the plant by assuring EMRV operability before higher power levels are reached.
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