ML20056H043
| ML20056H043 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 08/30/1993 |
| From: | CENTERIOR ENERGY |
| To: | |
| Shared Package | |
| ML20056H038 | List: |
| References | |
| NUDOCS 9309080125 | |
| Download: ML20056H043 (2) | |
Text
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Docket Number 50-346
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License Number WPF-3 Serial Number 2139 Attachment Page 5 j
CCNTAINMENT !?!TEuS CONTAINMENT WYDROGEN OTLUTTCN 5YSTEM l
LIMITING CCNDITION FOR OPERATION l
i 1.6.4.3 Two'inoeoeneent containment hydrogen cilution systems snall te OPERABLE.
APPLICABILITY: MODES 1 and 2.
ACTION.
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/ ti,')With one containment nyorogen dilution system inocereole, restore tnet
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) inoperable system to OPERABLE status within 30 days or ce in at least(
t yDTY within tne next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
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I 4.6.4.3 Each containment hydrogen dilution system shall be demonstrated OPERABLE at least once per 9Z days on a STAGEEED TEST BASIS by:
a.
Verifying that the system can be started on operator action in the control room, and b.
Verifying ttat the system operates for at least 15 minutes ano the blauer envelops a discW pmssure of 15 psig.
1 DAVIS-bel 1E. UNIT 1 3/4 6-25 93090B0125 930830 DR ADOCK 05000346 0
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Docket Number 50-346 License Number NPF-3 i
Serial Number 2139 Attachment
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Page 6 l
i CCNTAINMENT SYSTEMS l
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!3 /4. 6. 4 CCMBUSTIBLE GAS CONTROL l
The OPERABILITY of the Hydrogen Analyzers, Containment Hydrogen l
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' Dilution System, and Hydrogen Purge System ensures that this equipment 1
will be available to maintain the maximum nydrogen concentration within the containment vessel at or below three volume percent following a LOCA.
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The two reoundant Hydrogen Analyzers determine the content of hyoro-l 1
gen within the containment vessel. The Hydrogen Analyzers, althougn they have tneir OPERABILITY reovirements in this Specification, are considerno j
part of the post-accident monitoring instrimentation of Specification 3/4.3.3.5, Post-Accident Monitoring Instrumentation.
l The Containment Hydrogen Dilution (CHD) System consists of two full j
cacacity, recundant, rotary, positive displacement type blowers to supply i
air to the containment. The CHD System centrols the hydrogen concentra-I
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tion oy the modition of air to the containment vessel, resulting in a f
pressurization of the containment and suppression of the hydrogen volume r
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The Containment Hydrogen Pur1te System Filter Unit functionsles-e-l
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~.'tfie ERD systsa aw Os casigneo to release air from the co'nN atmosphere through a HEPA filter and charcoal filter prior to l
1, f_Alignarge to the station vent.
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3/4.6.5.1 EMER5ENCY VENTILATION SYSTEM
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The OPERABILITY of the emergency ventilation systems ensures that i
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containment vessel leakage occurring during LOCA conditions into the t
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annulus will be filtered througn the HEPA filters and charcoal adsorber i
trains prior to discharge to the atmosphere. This reouirement is neces-j i
f sary ta atest the assianotions used in the safety analyses and limit the
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site bouncary radiation deses to within the limits of 10 CFR 100 during 1
- LOCA conoitions.
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-Q DAVIS-BEIIE, UNIT 1 B 3/4 6-4 Amenaient No. A6,157
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