ML20065P035
| ML20065P035 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 04/21/1994 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20065P041 | List: |
| References | |
| NUDOCS 9404280231 | |
| Download: ML20065P035 (1) | |
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CONTAINMENT SYSTEMS
}/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.
APPLICABILITY: MODES 1, 2, 3, and 4.
&CTION:
With one or more of the isolation valve (s) inoperable, maintain at least or,a isolation barrier
- OPERABLE in each affected penetration that is open and:
Restore the inoperable valve (s) to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, l
a.
or b.
Isolate each affected penetration within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by use of at least l-'
one deactivated' automatic valve secured in the isolation position, or Isolate each affected penetration within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by use of at least c.
l' one closed manual valve or blind flange, or i
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 />.
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_ SURVEILLANCE REQUIREMENTS 4.6.3.1 The isolation valves shall be demonstrated OPERABLE prior to returning the valve to service after maintenance, repair-or replacement work is= performed on the valve or its associated actuator, control or power circuit by performance 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, 7
b.
Verifying that on a Containment Ventilation isolation test signal, 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 position.
d.
Verifying that on a Phase "A" Isolation test signal, coincident with 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 determined to be within its limit when tested pursuant to Specification 4.0.5.
- An isolation barrier may either be a closed system (i.e., General Design Criteria 57 penetrations) or an isolation valve.
SOUTH TEXAS - UNITS 1 &'2 3/4 6-17 Unit 1 - Amendment No. 4r30 G753r59 7
Unit 2 - Amendment-No. 24,31,42,47 j
9404280231 940421 pgx)CK 050 Cog 8-PDR P
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l CONTAINMENT SYSTEMS 314.6.4 COMBUSTIBLE CAS CONTROL HYDR 0 GEN ANALYIERS LIMITING CONDITION FOR OPERATION 3.6.4.1 Two independent containment hydrogen analyzers shall be OPERABLE.
APPLICABILITY: MODES I and 2.
ACTION:
With one hydrogen analyzer inoperable, restore the inoperable-a.
analyzer to OPERABLE status within 30 days or be in at least NOT STAND 8Y 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 both hydrogen analyzers inoperable, restore at least one i
analyzer 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 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 />.
1 SURVEftlaNCE RE0VIREMENTS 4.6.4.1 Each hydrogen analyzer. shall. be demonstrated OPERABLE by the performance of a CHANNEL CHECK at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, an ANALOG CHANN OPERATIONAL TEST at least once per 31 days, a channel OPERABILITY verificati one volume percent hydrogen, balance nitrogen,'and by pe Abr 4
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CALIBRATION at least once per 18 months using sample gas 'containing ten volume
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a percent hydrogen, balance nitrogen.
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i SOUTH TEXA3 - UNITS 1 & 2 3/4 6-18 Unit 1 - Amendment No. 77, 42
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1 Unit 2 - Amendment No. 77, 31 e
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