ML20082K345
| ML20082K345 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 04/13/1995 |
| From: | ENTERGY OPERATIONS, INC. |
| To: | |
| Shared Package | |
| ML20082K344 | List: |
| References | |
| NUDOCS 9504190246 | |
| Download: ML20082K345 (3) | |
Text
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/4tt,henk 2 MSIV LCS w 1 c3 3 3.6.1.9
~3. 6 CONTAINMENT SYSTEMS 3.6.1.9 Main Steam Isolation Valve (MSIV) Leakage Control System (LCS)
LC0 3.6.1.9 Two MSIV LCS subsystems shall be OPERABLE.
APPLICABILITY:
MODES 1, 2, and 3.
ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A.
One MSIV LCS subsystem A.1 Restore MSIV LCS 30 days inoperable.
subsystem to OPERABLE status.
B.
Two MSIV LCS B.1 Restore one MSIV LCS 7 days subsystems inoperable.
subsystem to OPERABLE status.
C Required Action and C.1 Be in MODE 3.
12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> associated Completion Time not met.
AND C.2 Be in MODE 4.
36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.6.1.9.1 Operate each outboard MSIV LCS blower 31 days l
2: 15 minutes.
(continued)
GRAND GULF 3.6-25 Amendment No. 124, 9504190246 950413 PDR ADOCK 05000416 P
G Mb-9 5/c o e5V 4 ++c cb w n+ Q MSIV LCS
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thqs Q F 3 3.6.1.9
. SURVEILLANCE REQUIREMENTS (continued)
SURVEILLANCE FREQUENCY SR 3.6.1.9.2 Deleted not applicable SR 3.6.1.9.3 Perform a system functional test of each 18 months MSIV LCS subsystem.
I l
l GRAND GULF 3.6-26 Amendment No. 440,
GN Ao Tr/coorV 4++5e w m q MSIV LfU B 3.6.1.9 pg3g3
,3 4ASES i
l ACTIONS C.1 and C.2 j
(continued)
If the MSIV LCS subsystem cannot be restored to OPERABLE 3
status within the required Completion Time, the plant must i
be brought to a MODE in which the LC0 does not apply. To achieve this status, the plant must be brought to at least i
i MODE 3 within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and to MODE 4 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.
The allowed Completion Times are reasonable, based on operating j
experience, to reach the required plant conditions from full 1
power conditions in an orderly manner and without challenging plant systems.
SURVEILLANCE SR 3.6.1.9.1 j
REQUIREMENTS Each outboard MSIV LCS blower is operated for a: 15 minutes 1
to verify OPERABILITY.
The 31 day Frequency was developed j
considering the known reliability of the LCS blower and i
i controls, the two subsystem redundancy, and the low 1
probability of a significant degradation of the MSIV LCS i
subsystem occurring between surveillances and has been shown l
to be acceptable th 'ough operating experience.
SR 3.6.1.9.2 Deleted i
SR 3.6.1.9.3 A system functional test is performed to ensure that the MSIV LCS will operate through its operating sequence. This includes verifying that the automatic positioning of the valves and the operation of each interlock and timer are correct, that the blowers start and develop the required flow rate and the necessary vacuum, and the upstream heaters meet current or wattage draw requirements (if not used to verify electrical continuity in SR 3.6.1.9.2).
The 18 month (continued)
GRAND GULF B 3.6-46 Revision No. 0
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