05000339/LER-1980-060-03, /03L-0:on 800913,in Mode 1,procedure 2-PT-62.4 Revealed That Leakage Past Outer Seals on Personnel Air Lock Door Exceeded Tech Specs.Caused by Misaligned Personnel Hatch on Outer Door

/03L-0:on 800913,in Mode 1,procedure 2-PT-62.4 Revealed That Leakage Past Outer Seals on Personnel Air Lock Door Exceeded Tech Specs.Caused by Misaligned Personnel Hatch on Outer Door

ML19338F114
Person / Time
Site:	North Anna
Issue date:	10/01/1980
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19338F102	List: 05000339/LER-1980-060, Forwards LER 80-060/03L-0 05000339/LER-1980-060-03, /03L-0:on 800913,in Mode 1,procedure 2-PT-62.4 Revealed That Leakage Past Outer Seals on Personnel Air Lock Door Exceeded Tech Specs.Caused by Misaligned Personnel Hatch on Outer Door
References
LER-80-060-03L-02, LER-80-60-3L-2, NUDOCS 8010070536
Download: ML19338F114 (2)

LER-1980-060, /03L-0:on 800913,in Mode 1,procedure 2-PT-62.4 Revealed That Leakage Past Outer Seals on Personnel Air Lock Door Exceeded Tech Specs.Caused by Misaligned Personnel Hatch on Outer Door

Event date:
Report date:
3391980060R03 - NRC Website

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U.S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT CONTROL BLOCK / / / / / / / (1)

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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LICENSEE CODE LICENSE NUMBER LICENSE TYPE CAT

/L/ (6)

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DOCKET NUMBER EVENT DATE REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES (10)

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On September 13, 1980 while operating in mode 1, 2-PT-62.4 was performed on

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the personnel air lock door seals. The leakage past the outer door seals was /

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in excess of the acceptance criteria of the periodic test.

Since the inner

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door was operable, and the containment was at a vacuum at the time the health /

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and safety of the public were not affected.

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SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

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/S/A/ (11) /E/ (12) [BL (13) /P/E/N/E/T/R/ (14) g/ (15) g/ (16)

SEQUENTIAL OCCURRENCE REPORT REVISION LER/R0 EVENT YEAR REPORT NO.

CODE TYPE NO.

(17) REPORT NUMBER

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ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRD-4 PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS SUBMITTED FORM SUB. SUPPLIER MANUFACTURER

/A/ (18) /Z/ (19) /Z/ (20) g [ (21) /0/0/0/0/ (22) g/ (23) /N/ (24) /X/ (25) /C/3/1/0/ (26 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (27)

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The outer door on the personnel hatch was mis-aligned thus causing leakage

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past the outer door seals. The outer door was centered and new seals in-

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stalled. Subsequent to maintenance, 2-PT-62.4 was performed with satisfactory /

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results.

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FACILITY METHOD OF STATUS

%P0k'ER OTHER STATUS DISNRY ESCMION (32)

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ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY (35)

LOCATION OF RELEASE (36)

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PERSON"EL EXPOSURES NUMEER TYPE DESCRIPTION (39)

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PERSONNEL INJURIES NUMBER DESCRIPTION (41)

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LOSS OF OR DAMAGE TO FACILITY

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DESCRIPTION

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PUBLICITY ISSUED DESCRIPTION (45)

NRC USE ONLY

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NA

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NAME OF M PARER R R. CAR M GHT M NE (703) 89b5151 8010070 $

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r Virginia Electric and Power Company North Anna Power Station, Unit #2 Attachment: Page 1 of 1 Docket No. 50-339 Report No. LER 80-060/03L-0 De,scription of Event On September 13, 1980, with the unit in mcde I, the personnel air lock seal leakage test was performed and leakage was detected. This is contrary to T.S. 3.6.1.3 and reportable pursuant to T.S. 6.9.1.9.b.

Probable Consequences of Occurrence The consequences of this event were minimal in that the inner door of the personnel hatch was operable with the containment under vacuum.

Therefore any leakage through the seals would have been into the containment.

Consequently, the health and safety of the public were not affected.

Cause of Event

The outerdoor was slightly off center thus causing slight damage to the seals.

Immediate Corrective Action

An emergency maintenance report was issued, the door was centered and new seals were installed. Subsequent to maintenance, 2-PT-62.4 was successfully completed.

Scheduled Corrective Action Periodic test 2-PT-62.4 shall be performed after each opening, except when the air lock is being used for multiple entries, then at least once every 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

Actions Taken to Prevent Recurrence No other action taken to prevent recurrence.

Generic Implications No generic implications.