ML20140A430
| ML20140A430 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 03/17/1986 |
| From: | NRC |
| To: | |
| Shared Package | |
| ML20140A434 | List: |
| References | |
| NUDOCS 8603200105 | |
| Download: ML20140A430 (1) | |
Text
,
e VYGpS TABLE 3.2.5 NOTES 1.
There shall be two operable or tripped tr'ip systems for each function in the required operating mode.
If the minimum number of operable instruments are not available for one of the two trip systems, this condition may exist for up to seven days provided that during the time the operable system is functionally tested immediately and daily thereafter; if the condition lasts longer than seven days, the system shall be tripped.
If the minimum number of instrument channels are not available for both trip systems, the systems shall be tripped.
2.
One of these trips may be bypassed. The SRM function may be bypassed in the higher 'IRM ranges When the IRM upscale rod block is operable.
g,4 This function may be bypassed when count rate is >100 cps or when all IRM range switches are above position 2.
3.
4.
IRM downscale may be bypassed when it is on its lowest scale.
5.
- W" is percent rated drive flow where 100% rated drive flow is that flow equi, valent to 48 x 106 lbs/hr core flow. Refer to L.C.O. 3.11.C for acceptable values for N.
6.
The minimum number of operable instrument channels may be reduced by one for maintenance and/or testing for periods not in excess of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> in any 30-day period.
7.
The trip may be bypassed when the reactor power is $ 0% of rated. An RBM channel will be considered inoperable 3
if there are less than half the total number of normal inputs from any LpRM level.
8.
With the number of operable channels less than required by the minimum operable channels per trip function requirement, place the inoperabic channel in the tripped condition within one hour.
9.
With one RBM channel inoperable:
Verify that the reactor is not operating on a limiting control rod pattern, and a.
b.
Restore the inoperable RBM channel to operable status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
Otherwise, place the inoperable rod block monitor channel in the tripped condition within the next hour.
Amendment No. 6A, 1), 18, 90 48 8603200105 860317 PDR ADOCK 05000271 P