ML19326D759

LER 80-017/03L-0:on 800601,inner Containment Hatch Door Leaked Air Past Seals During Test Performance.Caused by Dirty Seals.Seals Cleaned & Air Lock Tested Satisfactorily

ML19326D759
Person / Time
Site:	North Anna
Issue date:	06/30/1980
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19326D757	List: ML19326D756 ML19326D759
References
LER-80-017-03L-01, LER-80-17-3L-1, NUDOCS 8007030275
Download: ML19326D759 (2)

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b# U.S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT CO OL BLOCK / / / / / / / (1) (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION',

/0/1/ /V/A/N/A/S/2/ (2) /0/0/-/0/0/0/0/0/-/0/0/ (3) /4/1/1/1/1 (4) / / / (5)

LICENSEE CODE. LICENSE NUMBER LICENSE TYPE CAT E

/L/ (6) /0/5/0/0/0/3/3/9/ (7) /0/6/0/1/8/0/ (8) /0/6/3/0/8/0 (9)

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

/0/2/ / On June 1, 1980, with unit in Mode 3, while performing a leak test on the /

/0/3/ / personnel air lock, it was determined that the inner containment hatch door /

/0/4/ / leaked air past its seals. The outer door, however did not leak and since the /

/0/5/ / plant had never been critical and had no fission product buildup in the core, /

/0/6/ / the health and safety of the general public were not affected. Pursuant to /

/0/7/ / T.S. 6.9.1.9.b. /

/0/8/ / /

. "' STEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

/0/9/ /S/A/ (11) /E/ (12) /B/ (13) /P/E/N/E/T/R/ (14) /A/ (15) g/ (16)

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

(17) REPORT NUMBER /8/0/ /-/ /0/1/7/ /\/ /0/3/ /L/ '-/ [0/

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

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

/1/0/ / The seals on the inner door were leaking because : hey needed cleaning. After /

/1/1/ / cleaning the seals, the personnel air lock was tested with satisfactory /

Lid / / results. /

/1/3/ / / )

/1/4/ / /

FACILITY METHOD OF STATUS  % POWER OTHER STATUS DISCOERY DESCRMION (32)

/1/5/ /B/ (28) /0/0/0/ (29) / NA / (30) DISC 0ERY / While Performing Leak Test /

/B/ (31)

ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY (35) LOCATION OF RELEASE (36) I

/1/6/ /Z/ (33) /Z/ (34) / NA / / NA / l PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION (39)

/1/7/ /0/0/0/ (37) /Z/ (38) / NA / l PERSONNEL INJURIES NUMBER DESCRIPTION (41)

/1/8/ /0/0/0/ (40) / NA /

LOSS TYPE OF OR DAMAGE TO FACILITY (43)

DESCRIPTION l /1/9/ /Z/ (42) / NA /

PUBLICITY

ISSUED DESCRIPTION (45) NRC USE ONLY I /2/0/- /N/ (44) / NA /////////////

l NAME OF PREPARER W. R. CARTWRIGHT PHONE (703) 894-5151 _

80070eog pg . _.

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Virginia 'flectric and Power Company North Anna Power Station, Unit 2

Attachment:

Page 1 of I Docket No. 50-339 -

Report No. 80 017/03L-0 Attachment to LER 80-017/03L-0 Description of Event On June 1, 1980, with the unit in Mode 3, it was determined that the inner containment personnel air lock door seals le:ked while being air pressure tested. 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 containment personnel air lock is designed to withstand con-tainment test pressure as well as provide an access into the containment when under vacuum or at atmospheric pressure. The health and safety of the general public were not affected by this event because of the fol-lowing reasons. The seals were cleaned and the hatch passed the pres-surized air test within the action statement time period. The plant was not critical and the outer air lock door was tight. In addition, the core had never been critical and, therefore, there was no inventory of fission products present in the core.

Cause of Event l

The personnel air lock had been used excessively since fueling l operations began. Due to repeated opening and closing of the doors, the

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seals needed cleaning to maintain integrity of the containment.

Immediate Corrective Action The inner door seals were cleaned and the pressurized air test was performed to verify a proper seal.

Scheduled Corrective Action The 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 per 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

Actions Taken to Prevent Reccurrence No further actions are required.

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