ML20114A880

Proposed TS 3.6.3 Re Operability of Containment Isolation Valves

ML20114A880
Person / Time
Site:	South Texas
Issue date:	08/18/1992
From:	HOUSTON LIGHTING & POWER CO.
To:
Shared Package
ML20114A879	List: ML20114A880 ST-HL-AE-4178, Application for Amends to Licenses NPF-76 & NPF-80,changing Wording in TS 3.6.3 Action Statement to Require That at Least One Isolation Barrier Instead of One Isolation Valve Be Maintained Operable
References
NUDOCS 9208240053
Download: ML20114A880 (2)

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3/4.6.3 CONTAINMENT ISOLATION VALVES LIMITING CONDITION FOR OPERATION 3.6.3 The containment isolation valves shall be OPERABLE with isolation times less than or equal to the required isolation times.

APPtICABILITY: HODES 1, 2, 3, and 4.

ACTION:

With one or more of the isolation valve (s) inoperable, maintain at least one isolationlveh+ 0PERABLE in each effected penetration that is open and:

W,ci e '

i Restore the inoperable valve (s) to OPERABLE status within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, a.

or b.

Isolate each affected penetration within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> by use of at least one deactivated automatic valve secured in the isolation positier.,

or Isolate each affected penetration within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> by use of at least c.

one closed manual valve or blind flange, or d.

Be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />, i

SURVEILLANCE REQUInEMENTS 4.6.3.1

the valve to service af ter maintenance, repair or replacement work is per on the valve or its associated actuator, control or power circuit by perform-ance of a cycling test, and verification of isolation time.

4.6.3.2 Each isolation valve shall be demonstrated OPERABLE during the COLD SHUTDOWN or REFUELING MODE at least once per 18 months by:

Verifying that on a Phase "A" Isolation test signal, each Phase "A" a.

isolation valve actuates to its isolation position; Verifying that on a Containment Ventilation Isolation test signal, b.

each purge and exhaust valve actuates to its isolation position; and Verifying that on a Phase "B" Isolation test signal, each Phase "B" c.

isolation valve, actuates to its isolation p W tion, Verifying that on a Phase "A" Isolation test signal, coincident with d.

a low charging header pressure signal, that each seal injection valve actuates to its isolation position.

4.6.3.3 The isolation time of each power-operated or automatic valve shall be detemined to be wit *in its limit when tested pursuant to Specification 4.0.5.

b SOUTH TEXAS - UNITS 1 & 2 3/4 6-19 Unit 1 - Amendment No. 4 30 Unit 2 - Amendment No. 21 i

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