ML20106B006
| ML20106B006 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 05/26/1992 |
| From: | HOUSTON LIGHTING & POWER CO. |
| To: | |
| Shared Package | |
| ML20106B004 | List: |
| References | |
| NUDOCS 9209300222 | |
| Download: ML20106B006 (2) | |
Text
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S ATTACHMENT 2 PROPOSED TECHNICAL SPECITICATION 4.3.4 9
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-a 3/4.3.4 TURPINE OVERSPEED PROTECTION 1.LM1HNCuCORQ10N_ EOR OPrfATJON 3.3.4 At least one Turbine Overspeed Protection System shall be OPERABLE.
APPICADILITY: MDDES 1, 2, and 3.
ACTION:
With one stop valve or one governor valve per high pressure turbine a.
steam line inoperable and/or with one reheat stop valve one reheat intercept valve per low pressure turbine steam line inoperable, restore the inoperable valve (s) to OPEFABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, nr close at least one valve in the affected steam line(s) or isolate che 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 />.
D.
Witu r.he abnve 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 /> isolete the turbine from the steam supply.
S$ C LL ECEftEQU!PEMENTS 4.3.4.3 Tne provisions of Specification 4.0.4 are not applicable.
4.3.4.2 The above required Turbine Overspeed Protection System shall be detenstrettd OPERAGtC:
a.
At least once per 31 days in MODES I and 2 when the main turbine is operating by cycling eaca. of the following valves through at least one coeplete cycle f rom t% running position:
1)
Four high pressure turoine stop valves,
- 2). Four high pressure turbine governor valves, 3)
Six low pressure turbine reheat stop valves, and 4)
Six low pressure turbine reheat intercept valves, b.
At least once per 31 days in K) DES 1 and 2 when the main turbine is operating by direct observation of the movement of each of the above valves through one complete cycle from the running position, C.
At least once per 18 months by performance of a CHANNEL CALIBRATION on the Turbine Overspeed Protection Systems, and 7
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 stens and verifying no unacce.otable flaws or e n.c s', i ve t.o rTos i on.
If unacceptable flaws or excessive corrosion ere found, all other valves of that type shall be inspected.*
- h15 M.st bly tnd inspet. tion of the low pressure turbine reheat intercept velves are not reGuired prior tu the end of the first 40 month interval.
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