ML20211D622

Proposed Tech Spec 4.6.2.3 Re Surveillance Requirements for Containment Sys Concerning Drywell Air Lock

ML20211D622
Person / Time
Site:	Grand Gulf
Issue date:	02/13/1987
From:	SYSTEM ENERGY RESOURCES, INC.
To:
Shared Package
ML20211D614	List: AECM-87-0037, Revises 861111 Application for Amend to License NPF-29, Changing Tech Spec 4.6.2.3.d.1 Re Drywell Airlock Seal Pressure Instrumentation Channel Functional Test Submitted on 860528,per Discussion W/Nrc.Proposed Tech Spec Page Encl ML20211D622
References
TAC-64095, NUDOCS 8702240061
Download: ML20211D622 (1)

Text

W CONTAINMENT SYSTEMS SURVEILLANCE REQUIREMENTS TAe l 4.6.2.3 -E-eeh-drywell 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 /> # af ter 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 seal leakage rate less than or equal to 2 scf per hour when the gap between the door seals is pressurized to P,,11.5 psig.

b. By conducting an overall air lock leakage test at Pa ,11.5 psig and verifying that the overall air lock leakage rate is within its

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1. At Ica;t ...ce per C ,;,;rtL ,

2. Prior to establishing DRYWELL INTEGRITY when maintenance has been performed on the air lock that could affect the air lock sealing capability.

c. At least once per months by verifying that only one door in l air lock can be opened at a time.

d. By verifying each airlock door inflatable seal sy' stem OPERABLE by:

1. Demonstrating each of the two inflatable seal pressure instrumentation channels per airlock door OPERABLE by performance of a:

18 menTLs a) CHANNEL FUNCTIONAL TEST at least once per 21 d y;, and l

b) CHANNEL CALIBRATION at least once per 18 months, with a low pressure setpoint of > 60 psig.

2. At least once per 7 days verifying seal air flask pressure to be greater than or equal to 90 psig.

3. At least once per 18 months, conducting a seal pneumatic system leak test and verifying that system pressure does not decay more than 2 psig from 90 psig within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.

The provisions of Specification 4.0.2 are not applicable.

B702240061 870213 PDR ADOCK 05000416 P PDR GRAND GULF-UNIT 1 3/4 6-16 4,JM / _ l

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