ML20094A468
| ML20094A468 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 10/31/1984 |
| From: | DUKE POWER CO. |
| To: | |
| Shared Package | |
| ML20094A463 | List: |
| References | |
| NUDOCS 8411060431 | |
| Download: ML20094A468 (1) | |
Text
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INSTRUMENTATION 3/4.3.4 TURBINE OVERSPEED PROTECTION LIMITING CONDITION FOR OPERATION 3.3.4 At least one Turbine Overspeed Protection System shall be OPERABLE.
APPLICABILITY: MODES 1, 2, and 3.
ACTION:
With one stop valve or one control valve per high pressure turbine a.
steam line inoperable and/or with one intermediate stop valve or one intercept valve per low pressure turbine steam line inoperable, restore the inoperable valve (s) to OPERA 8LE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, or close at least one valve in the affected steam line(s) or isolate.
the turbine from the steam supply within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
b.
With the above required Turbine Overspeed Protection System otherwise inoperable, within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> isolate the turbine from the steam supply.
SURVEILLANCE REQUIREMENTS 4.3.4.1 The provisions of Specification 4.0.4 are not applicable.
4.3.4.2 The above required Turbine Overspeed Protection System shall be demonstrated OPETdje in Moot 1. a.1 dde in Mote z. M h furbe oeudig, At least once pMby cycling each of the following valves a.
through at least one complete cycle from the running position:
1)
Four high pressure turbine stop valves, 2)
Four high pressure turbine control valves, 3)
Six low pressure turbine intermediate stop valves, and 4)
Six low pressu turbine intercept valves. /w-biu opera a k,le un mcas t. uk s:te k. nove z. w;tH;,a b.
At least once per 31 dayslby direct observation of the movement of each of the above valves through one complete cycle from the running
- position, At least once per 18 months by performance of a CHANNEL CALIBRATION c.
on the Turbine Overspeed Protection Systems, and d.
At least once per 40 months by disassembling at least one of each of the above valves and performing a visual and surface inspection of valve seats, disks and stems and verifying no unacceptable flaws or corrosion.
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