ML19318B664

LER 80-015/03L-0:on 800525,personnel Air Lock Outer Door Could Not Be Closed Due to Hydraulic Sys Failure.Caused by Broken Pressure Gauge Connection.Connection Repaired,Tested & Returned to Svc

ML19318B664
Person / Time
Site:	North Anna
Issue date:	06/23/1980
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19318B660	List: ML19318B659 ML19318B664
References
LER-80-015-03L-02, LER-80-15-3L-2, NUDOCS 8006270275
Download: ML19318B664 (2)

Text

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U.S. NUCLEAR REGULATORY COMMISSION

(; LICENSr.E EVENT REPORT CONTROL 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

/0/1/

/L/ (6) /0/5/0/0/0/3/3/9/ (7) /0/5/2/5/8/0/ (8) / 0/6/ 2/ 3/8/0 (9)

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

/0/2/ / During Mode 3 operation, the personnel air lock outer door could not be closed /

/0/3/ / due to the failure of the hydraulic system. Since the Unit was in Mode 3 /

/0/4/ / prior to initial criticality, health and safety of the public was not /

/0/5/ / affected. This item is reportable pursuant to T.S. 6.9.1.9.b.

/0/6/ / /

/0/7/ / /

/0/8/ / /

SYSTEM 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) /2/ (16)

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

(17) REPORT NUMBER /8/0/ /-/ /0/1/5/ /\/ /0/3/ /_Lf_ /-/ LO/

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

/B/ (18) /Z/ (19) /Z/ (20) /Z/ (21) /0/0/0/0/ (22) LY/ (23) /N/ (24) /A/ (25) /C/3/1/0/ (26' ,

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (27)

/1/0/ / The failure of the hatch door hydraulic system was due to a broken pressure /

/1/1/ / gage connection. The connection was repaired, tested and returned to service. /

/1/2/ /

/

/1/3/ /

/

/1/4/ / /

FACILITY METHOD OF STATUS  % POWER OTHER STATUS S OE RY DISCOERY DESCR M ION (32)

/1/5/ /B/ (28) /0/0/0/ (29) / NA / (30) /A/ (31) / OPERATOR OBSERVATION /

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

/1/6/ /Z/ (33) /Z/ (34) / NA / / NA /

PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION (39)

/1/7/ /0/0/0/ (37) /Z/ (38) / NA /

PERSONNEL INJURIES NUMBER DESCRIPTION (41)

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

LOSS OF OR DAMAGE TO FACILITY TYPE DESCRIPTION G3)

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

/2/0/

ISSUE

/N/ (44) /

CRIPTION NA 06270 7 7 [ NRC USE ONLY

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

+

Virginia Electric and Power Company North Anna Power Station, Unit #2

Attachment:

Page 1 of I Docket No. 50-339 Report No. LER 80-015/03L-0 Description of Event On May 25, 1980, during Mode 3 operation, maintenance personnel were attempting to enter the containment through the personnel a. cess hatch. The hatch outer door failed to close due to a loss of hydraulic pressure in the closing system.

Probable Consequences of Occurrence The consequences of this event were limited since the unit was in Mode 3 prior to initial criticality and due to the presence of an inter-lock p.cventing the opening of the inner door while the outer door is opened. Therefore, the health and safety of the public were not affected.

Cause of Event The loss of hydraulic pressure was due to the failure of a connection to the hydraulic system pressure gage. This prevented the system from developing sufficient pressure to close the door.

Immediate Corrective Action A maintenance request was submitted. The system was repaired, tested and placed in service.

Scheduled Corrective Action No further action required.

Actions Taken to Prevent Recurrence No further action required.

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