ML030920560
| ML030920560 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 04/01/2003 |
| From: | Lyon C NRC/NRR/DLPM/LPD3 |
| To: | Skolds J Exelon Generation Co, Exelon Nuclear |
| References | |
| TAC MB6136, TAC MB6137 | |
| Download: ML030920560 (2) | |
Text
ATWS-RPT Instrumentation 3.3.4.1 SURVEILLANCE REQUIREMENTS
:------------NOTE-------------------------------------
When a channel is placed in an inoperable status solely for performance of required Surveillances, entry into associated Conditions and Required Actions may be delayed for up to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> provided the associated Function maintains ATWS-RPT trip capability.
SURVEILLANCE FREQUENCY SR 3.3.4.1.1 Perform CHANNEL CHECK.
12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> SR 3.3.4.1.2 Calibrate the trip units.
92 days SR 3.3.4.1.3 Perform CHANNEL FUNCTIONAL TEST.
92 days SR 3.3.4.1.4 Perform CHANNEL CALIBRATION.
The 24 months Allowable Values shall be:
- a.
Reactor Vessel Water Level-Low Low:
2 -56.3 inches with time delay set to 2 7.2 seconds and s 10.8 seconds; and
- b.
Reactor Vessel Steam Dome Pressure-High: s 1219 psig.
SR 3.3.4.1.5 Perform LOGIC SYSTEM FUNCTIONAL TEST 24 months including breaker actuation.
I Quad Cities I and 2 3.3.4.1 -3 Amendment No. 213/207
ATWS-RPT Instrumentation B 3.3.4.1 BASES SURVEILLANCE REQUIREMENTS (continued)
SR 3.3.4.1.2 Calibration of trip units provides a check of the actual trip setpoints.
The channel must be declared inoperable if the trip setting is discovered to be less conservative than the Allowable Value specified in SR 3.3.4.1.4.
If the trip setting is discovered to be less conservative than the setting accounted for in the appropriate setpoint methodology, but is not beyond the Allowable Value, the channel performance is still within the requirements of the ATWS analysis.
Under these conditions, the setpoint must be readjusted to be equal to or more conservative than accounted for in the appropriate setpoint methodology.
The Frequency of 92 days is based on the reliability analysis of Reference 3.
SR 3.3.4.1.3 A CHANNEL FUNCTIONAL TEST is performed on each required channel to ensure that the channel will perform the intended function.
A successful test of the required contact(s) of a channel relay may be performed by the verification of the change of state of a single contact of the relay.
This clarifies what is an acceptable CHANNEL FUNCTIONAL TEST of a relay.
This is acceptable because all of the other required contacts of the relay are verified by other Technical Specifications and non-Technical Specifications tests at least once per refueling interval with applicable extensions.
Any setpoint adjustment shall be consistent with the assumptions of the current plant specific setpoint methodology.
The Frequency of 92 days is based on the reliability analysis of Reference 3.
SR 3.3.4.1.4 A CHANNEL CALIBRATION is a complete check of the instrument loop and the sensor, including the time delay relays associated with the Reactor Vessel Water Level-Low Low Function.
This test verifies the channel responds to the (continued)
Quad Cities I and 2 8 3.3.4.1-9 Revi sion