05000281/LER-1979-003-03, /03L-0 on 790122: Following Containment Entrance Equipment Hatch Escape Airlock,Outer Door Was Not Proven Sealed within 72-h from Initial Opening.Caused by Problems in Sealing Exterior Hatch

/03L-0 on 790122: Following Containment Entrance Equipment Hatch Escape Airlock,Outer Door Was Not Proven Sealed within 72-h from Initial Opening.Caused by Problems in Sealing Exterior Hatch

ML18113A851
Person / Time
Site:	Surry
Issue date:	02/15/1979
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18113A849	List: 05000281/LER-1979-002, Forwards LER 79-002/03L-0 & 79-003/03L-0 05000281/LER-1979-002-03, /03L-0 on 790120: During Normal Operation Channel Check Revealed That Pressurizer Pressure Channel I Drifted Above Tech Spec Limit as Compared to Channels II & Iii. Caused by Failure of Channel I Pressure Transmitter 05000281/LER-1979-003-03, /03L-0 on 790122: Following Containment Entrance Equipment Hatch Escape Airlock,Outer Door Was Not Proven Sealed within 72-h from Initial Opening.Caused by Problems in Sealing Exterior Hatch
References
LER-79-003-03L-01, LER-79-3-3L-1, NUDOCS 7902220100
Download: ML18113A851 (2)

LER-1979-003, /03L-0 on 790122: Following Containment Entrance Equipment Hatch Escape Airlock,Outer Door Was Not Proven Sealed within 72-h from Initial Opening.Caused by Problems in Sealing Exterior Hatch

Event date:
Report date:
2811979003R03 - NRC Website

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I Following a containment entrance, the equipment hatch escape airlock outer door~was -i10t I proven sealed within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from the.initial OJ?ening.

This event i~ contrary to..the I NRC staff interpretation of Appendix J of 10CFR50, r_e-quiring-*that airlock seals. be leak l L2J.2J tested within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> of the initial opening.

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!The delay in successful leak rate testing the equipment hatch escape airlock outer door L.J2...i.

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Adjustments were made to the roller lassewbly of the exterior hatch and the leak rate test was performed satisfactorily cm -

1within four hours after the expiration time limit.

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• (A~tachment, page 1 of 1)

Surry Power Station, Un' 2 Docket No: 050-0281 Report No: 79-03/03L-0 Event Date:

1-22-79 Equipm.ent Hatch Leak Test Not Conducted

1.

Description of Event

Following a containment entrance, the equipment hatch escape airlock-outer door was not proven sealed within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from the initial opening.

This event is contrary to the NRC staff interpretation of Appendix J of 10CFR50, requiring that the airlock seals be leak tested within 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />s--0--f. the initial opening.

~ Since the inner hatch proved to be sealed properly, this event had no:effect on the health and safety of the general public.

2.

Probable Consequences of Event:

Delay of the equipment hatch escape airlock outer door leak test had DO effect upon the health or safety of the general public because containment integrity was maintained by the interior hatch.

3.

Cause of Event

Required adjustments to the exterior hatch resulted in a delay of successful testing of the exterior hatch.

4.

Immediate Corrective Action

Adjustments were made to the roller assembly of the exterior hatch and the leak rate test was performed satisfactorily within four hours after the expiration time limit.

5.

Scheduled Corrective Action:

None

6.

Action Taken to Prevent Recurrence:

None necessary.

7.

Generic Implications:

None