ML070810646
| ML070810646 | |
| Person / Time | |
|---|---|
| Site: | Point Beach, Prairie Island  |
| Issue date: | 03/21/2007 |
| From: | Milano P NRC/NRR/ADRO/DORL/LPLIII-1 |
| To: | |
| P. Milano X1457 | |
| Shared Package | |
| ML070600580 | List: |
| References | |
| TAC MD0936, TAC MD0937 | |
| Download: ML070810646 (3) | |
Text
LOP DG Start Instrumentation 3.3.4 3.3 INSTRUMENTATION 3.3.4 Loss of Power (LOP) Diesel Generator (DG) Start Instrumentation I
LCO 3.3.4 The following LOP DG Start Instrumentation shall be OPERABLE:
- a.
Three channels per bus of the 4.16 kV loss of voltage Function,
- b.
Three channels per bus of the 4.16 kV degraded voltage Function, and
- c.
Three channels per bus of the 480 V loss of voltage Function.
APPLICABILITY:
MODES 1, 2, 3, and 4, When associated DG is required to be OPERABLE by LCO 3.8.2, "AC Sources -Shutdown."
ACTIONS NOTE Separate Condition entry is allowed for each Function.
CONDITION REQUIRED ACTION COMPLETION TIME A.
One or more Functions A.1 Place channel in trip.
1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> with one channel per bus inoperable.
B.
Two or more 4.16 kV B.1 Restore all but one 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> loss of voltage or channel to OPERABLE 4.16 kV degraded status.
voltage channels per bus inoperable.
(continued)
Point Beach 3.3.4-1 Unit 1 - Amendment No. 225 Unit 2 - Amendment No. 231
LOP DG Start Instrumentation 3.3.4 I ACTIONS (continued)
CONDITION REQUIRED ACTION COMPLETION TIME C.
Required Action and C.1 Enter applicable Immediately associated Completion Condition(s) and Time of Condition A for Required Action(s) for 4.16 kV Functions or the associated standby Condition B not met.
emergency power source made inoperable by LOP DG start instrumentation.
D.
Two or more 480 V loss D.1 Restore all but one 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> of voltage channels per channel to OPERABLE bus inoperable, status.
E.
Required Action and E.1 Be in MODE 3.
6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> associated Completion Time of Condition A for AND 480 V loss of voltage Function or Condition D E.2 Be in MODE 5.
36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> not met.
SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.3.4.1 Perform CHANNEL CHECK.
12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> S R 3.3.4.2 Perform TADOT.
31 days (continued)
Unit 1 - Amendment No. 225 Unit 2 - Amendment No. 231 Point Beach 3.3.4-2
LOP DG Start and Load Sequence Instrumentation 3.3.4 SURVEILLANCE REQUIREMENTS (continued)
SURVEILLANCE FREQUENCY SR 3.3.4.3 Perform CHANNEL CALIBRATION with Allowable Value as follows:
- a.
4.16 kV loss of voltage Allowable Value
> 3156 V with a time delay of > 0.7 seconds and < 1.0 second..
- b.
4.16 kV degraded voltage Allowable Value a 3937 V with a time delay of
< 5.68 seconds (bus degraded voltage relay) and
< 39.14 seconds (bus time delay relay)
- c.
480 V loss of voltage Allowable Value 256 V +/- 3% with a time delay of < 0.5 seconds.
18 months Point Beach 3.3.4-3 Unit 1 - Amendment No. 225 Unit 2 - Amendment No. 231