05000338/LER-1980-068-03, /03L-0:on 800801,during Full Power,Electrical Load Discovered as Having Been Added to 1H Emergency Bus W/O Approved Jumper.Caused by Improper Administrative Controls. Load Isolated from Emergency Bus & Personnel Reinstructed

/03L-0:on 800801,during Full Power,Electrical Load Discovered as Having Been Added to 1H Emergency Bus W/O Approved Jumper.Caused by Improper Administrative Controls. Load Isolated from Emergency Bus & Personnel Reinstructed

ML19331D777
Person / Time
Site:	North Anna
Issue date:	08/27/1980
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19331D772	List: 05000338/LER-1980-068, Forwards LER 80-068/03L-0 05000338/LER-1980-068-03, /03L-0:on 800801,during Full Power,Electrical Load Discovered as Having Been Added to 1H Emergency Bus W/O Approved Jumper.Caused by Improper Administrative Controls. Load Isolated from Emergency Bus & Personnel Reinstructed
References
LER-80-068-03L, LER-80-68-3L, NUDOCS 8009030561
Download: ML19331D777 (2)

LER-1980-068, /03L-0:on 800801,during Full Power,Electrical Load Discovered as Having Been Added to 1H Emergency Bus W/O Approved Jumper.Caused by Improper Administrative Controls. Load Isolated from Emergency Bus & Personnel Reinstructed

Event date:
Report date:
3381980068R03 - NRC Website

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U.S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT O

CONTROL BLOCK / / / / / / / (1)

(PLEASE PRINT OR TYPE ALL REQUIRED IhTORMA'1 ION)

/0/1/

/V/A/N/A/S/1/ (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

/L/ (6)

/0/5/0/0/0/3/3/8/ (7)

/0/8/0/1/8/0/ (8) /o /s /2 /7 /n /n / (9)

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

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/

On August 1, 1980, with the Unit at 100% power, it was discovered that an elec-/

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trical load had been added to the "1H" emergency bus without an approved

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jumper. Had a Safety Injection occurred in coincidence with the loss of off- /

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site power, the "1H" emergency diesel generator's response tray have been im-

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paired. Since the "1J" emergency diesel generator would have been available,

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the health and safety of the public were not affected. Reportable pursuant to /

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T. S. 6.9.1.9.c.

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SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

/0/9/

/E/B/ (11) /A/ (12) [C/ (13) /Z/Z/Z/Z/Z/2/ (14) g/ (15) g/ (16)

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

CODE TYPE NO.

(17) REPORT NUMBER

/8/0/

/-/ /0/6/8/

/\\/

/0/3/

/L/

/-/

[0/

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

/X/ (18) /Z/ (19) /2/ (20) /Z/ (21) /0/0/0/0/ (22) g/ (23) /N/ (24) /Z/ (25) /2/9/9/9/ (26 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (27)

/1/0/

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The cause of the incident was improper administrative controls. The load was /

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isolated from the emergency bus.

Personnel involved were reinstructed that an /

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approved jumper log is required prior to installation of a jumper.

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/1/4/

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FACIL.iTY METHOD OF STATUS

% POWER OTHER STATUS

/( } DISCOVERY DISCOVERY DESCRIPTION (32)

/1/5/

/E/ (28)

/1/0/0/ (29) /

NA

/A/ (31)

/ Operator Observation /

ACTIVITY C0h"1 TNT 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 (43)

TYPE

DESCRIPTION

/1/9/

/Z/ (42) /

NA

/

PUBLICITY ISSUED DESCRIPTION (45)

NRC USE ONLY

/2/0/

/N/ (44) /

NA

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NAME OF PREPARER V. R. CARTWRIGHT PHONE (703) 894-5151 8 0 090 s o 5'4 j

Virginia Electric and Power Company North Anna Power Station, Unit #1 Attachment: Page 1 of 1 Docket No. 50-338 Attachment to LER 80-068/03L-0

Description of Event

On August 1, 1980, with the unit at 100% power, it was discovered that the power supply for a temporary air compressor had been connected to the "1H" emergency bus and there was no approved jumper log for this connection which is reportable by T.S. 6.9.1.9.c.

This temporary motor driven air compressor along with a diesel driven air compressor was being used to supply instrument and service air to the two units since the installed air compressors had failed.

Probable Consequences of Event Although the installed instrument air compressor which is normally loaded onto the emergency bus was disconnected, its rated load was only 34 kw compared to approximately 225 kw for the temporary air compressor.

The emergency diesel generator had not been tested with this additional load during preoperational testing. Therefore, had a Safety Injection or Containment Depressurization Actuation occurred in coincidence with a loss of offsite power, the "1H" diesel generators dynamic response may have been impaired.

Cause of Event

On July 31, 1980, the electrical department connected the temporary air compressor to the emergency bus without an approved jumper log and the compressor was loaded onto the emergency bus.

Immediate Corrective Action

The temporary air compressor was unloaded and its power disconnected from the emergency bus.

i Scheduled Corrective Action None scheduled.

Actions Taken to Prevent Recurrence l

l Members of the Electrical Department were reinstructed that a l

Jumper log for a safety related jumper must be approved by the Station l

Nuclear Safety and Operating Committee.

In aodition, all jumper logs f

must be signed by the Shif t Supervisor immediately before installation.

l Generic Implications l

No generic implications.

l l

i