ML20154H832

Proposed Tech Spec Section 4.6.1.3,incorporating Addl Methods of Surveillance for Assessing Containment Leak Tightness

ML20154H832
Person / Time
Site:	Millstone
Issue date:	05/19/1988
From:	NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20154H808	List: B12896, Application for Amend to License NPF-49,changing Tech Spec Section 4.6.1.3 by Incorporating Addl Methods of Surveillance for Assessing Containment Leak Tightness.Fee Paid ML20154H832
References
NUDOCS 8805260081
Download: ML20154H832 (1)

Text

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CONTAINMENT SYSTEMS SVRVEILLANCE RE0VIREMENTS 4.6.1.3 Each containment air lock shall be demonstrated OPERABLE:

a.

1)

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 verifying no detectable seal leakage by pressure decay when the volume between the door seals is pressurized to greater than or equal to P, 54.1 psia (39.4 psig), for at a

least 15 minutes; or 2)

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 verifying that the seal leakage is less than 0.01 L

as determined by precision flow measurements when measured f8r at least 30 seconds with the volume beween the seals at a constant pressure of 54.1 psia (39.4 psig);

or 3)

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 completing an overall air lock leakage test per 4.6.1.3.b.

b.

By conducting overall air lock leakage tests at not less than P@e, 54.1 psia (39.4 psig), and verifying the overall air lock leaka rate is within its limit:

1)

At least once per 6 months,* and 2)

Prior to establishing CONTAINMENT INTEGRITY when maintenance 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 air lock can be opened at a time.

• The provisions of Specification 4.0.2 are not applicable.

• • This represents an exemption to Appendix J, paragraph III.D.2.(b)(ii), of 10 CFR Part 50.

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