ML20070P396
| ML20070P396 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 03/20/1991 |
| From: | COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML20070P374 | List: |
| References | |
| NUDOCS 9103270278 | |
| Download: ML20070P396 (1) | |
Text
_
95 CONTAINMENT SYSTEMS SURVEILLANCE _ REQUIREMENTS 4.6.1.3 Each containment air lock shall be demonstrated OPERABLE:
a.
Within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> following each closing, except when the air lock is being used for multiple entries, then at least once per 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, by
-the-door-seals-45-pressurized-to greatertRan or the-volume-betwun ve ri fyi ng -sul-l ea kage-i s-l e s s -tha n-O r 01-L-when-equal-to-10-psigr-
-for-at-lust-16-minutu,
b.
By conducting overall air lock leakage tests at not less than P,,
44.4 psig, and verifying the overall air lock leakage rats is within its limit:
1)
At least once per 6 months,* and 2)
Prior to esLablishing CONTAINMENT INTEGRITY when maintenancs.
has been performed on the air lock that could affect the air lock sealing capability **
c.
At least once per 6 months by verifying that only one door in each 1
air lock can be opened at a time.
- d. M f{o (6 Jib a
W that the seal leakage is less than 0.01La (4.63 S;M as j
detern.ined by precision flow neasurements when measured for at least 30 seconds with the volume between the seals at a constant pressure of greater than or equal to 10 psigt i
.-~
/
j u Verifying that the seal leakage is less than 0.002(La (1.11 S0nO when the
[
volume between the door seals is pressurized to greater than or equal to 3 psig by means of a peta.anently installed continuous pressurization and leakage monitoring system, or kt*
- ) Verifying that thefseal leakage is less than 0.01La (4.63 FrH) as deternined by precision flow measureunenu when measured for at least 30 seconds with the volume between the seals at a constant pressure of greater than or equal to 10 psig;
- The prbisions of Specification 4.0.2 are not applicable.
A
- This represents an exemption to Appendix J of 10 CFR Part 50, Paragraph III U
D.2(b)(ii).
9103270278 910320 PDR ADOCK 05000454 P
PDR BRAIDWOOD - UNITS 1 & 2 3/4 6-5
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