ML20246D341
| ML20246D341 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 04/28/1989 |
| From: | DETROIT EDISON CO. |
| To: | |
| Shared Package | |
| ML20246D340 | List: |
| References | |
| NUDOCS 8905100197 | |
| Download: ML20246D341 (3) | |
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8905100197 890428 gDR ADOCK 05000341 PDC
Irof v5 CY (jO CONTAINMENT SYSTEMS 3/4.6.4 VACUUM RELIEF SUPPRESSION CHAMBER - DRYWELL VACUUM BREAKERS LIMITING CONDITION FOR OPERATION 3.6.4.1 All suppression chamber - drywell vacuum breakers shall be closed and at least 10 vacuum breakers shall be OPERABLE.*
l APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, and 3.
ACTION:
a.
With one of the above required vacuum breckers inoperable for opening but known to be closed, restore the inoperable vacuum breaker 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 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 />.
b.
With one or more suppression chamber - drywell vacuum breakers open, close the open vacuum breaker (s) within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-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 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 />.
I With one of the position indicators of any suppression c.
chamber - drywell vacuum breakers inoperable, verify that all other vacuum breakers are closed within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and:
l 1.
Verify the vacuum breaker (s) witE the inoperable position indicator to be closed by demonstrating the other indicator to be OPERABLE within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and at least once i
per 14 days thereafter, or 2.
Verify the vacuum breaker (s) with the inoperable position indicator to be closed by conducting a test which demonstrates that the drywell-to-suppression chamber dP is maintained at greater than or equal to 0.5 psi for one hour without makeup within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and at least once per 14 days thereafter.
Otherwise, be in at least HOT SHUTDOWN within the next 12 l
hours 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 />.
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d.
With one of the closed position indicators of one or more suppression chamber - drywell vacuum breaker (s) indicating open and the redundant closed position indicator indicating closed after a suppression chamber - drywell vacuum breaker opening as a result of a steam release, within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, cycle the applicable valve (s) to determine which of the redundant indicators is OPERABLE.
"The suppression chamber - drywell vacuun breakers may be-eenually opened for inerting the containment. All these vacuum breakers shallled1Qh3 closed h
position within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> after inerting is completed.
FERMI - UNIT 2 3/4 6-48
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CONTAINMENT SYSTEMS 3/4.6.4 VACUUM RELIEF SUPPRESSION CHAMBER - DRYWELL VACUUM BREAKERS LIMITING CONDITION FOR OPERATION I
3.6.4.1 All suppression chamber - drywell vacuum breakers shall be closed and at least 10 vacuum breakers shall be OPERABLE.*
APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, and 3.
j ACTION:
a.
With one of the above required vacuum breakers inoperable for f
opening but known to be closed, restore the inoperable vacuum j
breaker 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 4
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 />.
b.
With one or more suppression chamber - drywell vacuum breakers open, l
close the open vacuum breaker (s) within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-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 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 />.
c.
With one of the closed position indicators of one or more suppression chamber - drywell vacuum breaker (s) inoperable, verify the associated vacuum breaker and all other breakers to be closed within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, restore the inoperable position indicator to OPERABLE status within I
14 days or verify the vacuum breaker (s) with the inoperable position indicator to be closed by conducting a test which demonstrates that the drywell to suppression chamber AP is maintained at greater than or equal to 0.5 psi for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> without makeup within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and at least once per 15 days thereafter.
Otherwise, 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 l?'!
following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
d.
With one of the closed position indicators of one or more suppression chamber - drywell vacuum breaker (s) indicating open and the redundant
'l closed position indicator indicating closed after a suppression j) chamber - drywell vacuum breaker opening as a result of a steam release, within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, cycle the applicable valve (s) to determine which of the redundant indicators is OPERABLE.
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- The suppression chamber - drywell vacuum breakers may beaantrally opened for inerting the containment. All these vacuum breakers shallleimthe closed position within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> after inerting is completed.
9 FERMI - UNIT 2 3/4 6-48 l
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