ML20084U822

Proposed Tech Spec Surveillance Requirement 4.3.8.2.a Re Testing Turbine Overspeed Protection Sys

ML20084U822
Person / Time
Site:	River Bend
Issue date:	04/16/1991
From:	GULF STATES UTILITIES CO.
To:
Shared Package
ML20084U820	List: ML20084U822 RBG-34-834, Application for Amend to License NPF-47,changing Tech Spec Surveillance Requirement 4.3.8.2.a Re Turbine Overspeed Protection to Allow Monthly Testing of High Pressure Turbine Control Valves in Lieu of Weekly Testing
References
NUDOCS 9104230009
Download: ML20084U822 (1)

Text

'

ENCLOSURE p,'.

, IASTRUMENTATION

-3/4.3.8 TURBINE OVERSPEED PROTECTION SYSTEM LIMITING CONDITION FOR OPERATION 3.3.8 At least one turbine overspeed protection system shall be OPERABLE.

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APPLICABILITY: OPERATIONAL CONDITIONS 1 and 2.

ACTION:

a. With one turbine control valve or one turbine stop valve per high pressure turbine steam lead inoperable and/or with one turbine intercept valve or one turbine intermediate stop valve per low pressure turbine steam lead inoperable, restore the inoperable valve (s) to OPERABLE 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 lead 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.

, 'c . The provisions of Specifi' cation 3.0.4 are not applicable.  !

SURVEILLANCE REQUIREMENTS  !

4.3.8.1 The provisions of Specification 4.0.4 are not applicable.

4.3.8.2 The above required turbine overspeed protection system shall be demonstrated OPERABLE:

a. At least once per 7 days by cycling each of the following valves through at least one complate cycle from the running position:

1) Four hign pressure turbine stop valves,

2) Four low pressure-turbine intermediate stop valves,

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3/- Four low pressure turbine intercept valves, c /. At least once per 18 months by performance of a CHANNEL CALIBRATION of the turbine oversceed protection system, d/. At least once per 40 months by disassembling at least one of each of l the above valves and performing a visual and surface inspection of-all valve seats, disks and stems and verifying no unacceptable flaws or excessive corrosion. If unacceptable flaws or excessive corrosion are found, all other valves of that type shall be inspected,

b. At least once per 31 days by cycling the four high pressure turbine ,

control valves through at least one complete cycle from the running position.

RIVER BEND - UNIT 1 3/4 3-106 91042goOO9910416

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