ML17279A824
| ML17279A824 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 02/05/1988 |
| From: | WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| To: | |
| Shared Package | |
| ML17279A823 | List: |
| References | |
| TAC-67082, NUDOCS 8802190153 | |
| Download: ML17279A824 (3) | |
Text
'
CONTAINMENT SYSTEMS ORYWELL ANO SUPPRESSION CHAMBER PURGE SYSTEM LIMITING CONDITION FOR OPERATION 3.6. 1.8 The drywell and suppression chamber purge system may be in operation with the drywell and/or suppression chamber purge supply and exhaust butterfly isolation valves open for inerting, deinerting, or pressure control, provided that each butterfly valve is blocked so as not to open more than 70 PURGING through the Standby Gas Treatment System shall be restricted to less than or equa1 to 90 hours0.00104 days <br />0.025 hours <br />1.488095e-4 weeks <br />3.4245e-5 months <br /> per 366 days(555 NOT5 g)
APPLICABILITY:
OPERATIONAL CONDITIONS 1, 2, and 3.
ACTION:
a ~
With a drywell and/or suppression chambe.
purge supply and/or exhaust but erfly isolation valve open for other than inerting, deinerting, or pressure control, or not blocked to less than or equal to 70
- open, close the butterfly valve(s) within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLO SHUTDOWN within the ollowing 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
b.
With a drywell and suppression chamber purge supply and/or exhaust isolation valve(s) with resilient material seals having a measured leakage rate exceeding the limit of Surveillance Requirement
- 4. 6. l. 8. 2, restore the inoperable valve(s) to OPERABLE s atus within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
SURVEILLANCE REOUIREMENTS 4.6. 1.8. 1 When being opened, the drywell and suppression chamber purge supply and exhaust butterfly isolation valves shall be verified to be blocked so as to open to less than or equal to 70
- open, unless so verified within the previous 31 days.
- 4. 6. 1. 8. 2 At least once per 6 months, on a
STAGGERED TEST BASIS, each 24-and 30-inch drywell and suppress',on chamber purge supply and exhaust isolation valve with resilient material shall be demonstrated OPERABLE by verifying that he measured leakage is:
a.
b.
Less than or equal to 0.05 L
per valve test or, a
Greater than 4. 6. 1.8. Z. a. provided that:
- 1) the valves are secured closed and maintenance performed at the next. plant cold shutdown to reduce the leakage to within 4. 6. 1.8. 2. a; 2) the leakage added to the previously determined total for all valves and penetrations subiect to Type B and C tests per LCO 3/4.6. 1.2 shall be less than 0.6 L
a'n he event the valves ar6
" ne operated, anr-'
~ '.S.2.a.
has been
- exceeded, a leakage
- t. ~i..1ust be per forr:. '..:,In 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> following operation, to ensure compliance with 0. 6 L
a'ASHI"<GiON
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SURVEILLANCE REOUIREMENTS Continued 4.6. 1.8.3 The cumulative time that the drywell and suppression chamber purge system has been in operation PURGING through the Standby Gas Treatment System shall be verified to be less than or equal to 90 hours0.00104 days <br />0.025 hours <br />1.488095e-4 weeks <br />3.4245e-5 months <br /> per 365 days prior to use in this mode of operation(5m.p renT~ Q).
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