05000339/LER-1981-054-03, /03L-0:on 810629,train J of Onsite Ac Power Sys Discovered Not Tested Per Tech Specs Since 790316.Caused by Mistaken Impression That Both Buses Were Retested on 800331.Emergency Bus J Tested on 800331

/03L-0:on 810629,train J of Onsite Ac Power Sys Discovered Not Tested Per Tech Specs Since 790316.Caused by Mistaken Impression That Both Buses Were Retested on 800331.Emergency Bus J Tested on 800331

ML20009F665
Person / Time
Site:	North Anna
Issue date:	07/17/1981
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009F654	List: 05000339/LER-1981-054, Forwards LER 81-054/03L-0 05000339/LER-1981-054-03, /03L-0:on 810629,train J of Onsite Ac Power Sys Discovered Not Tested Per Tech Specs Since 790316.Caused by Mistaken Impression That Both Buses Were Retested on 800331.Emergency Bus J Tested on 800331
References
LER-81-054-03L, LER-81-54-3L, NUDOCS 8107310390
Download: ML20009F665 (2)

LER-1981-054, /03L-0:on 810629,train J of Onsite Ac Power Sys Discovered Not Tested Per Tech Specs Since 790316.Caused by Mistaken Impression That Both Buses Were Retested on 800331.Emergency Bus J Tested on 800331

Event date:
Report date:
3391981054R03 - NRC Website

text

a U.S. NUCLEAR REGULATORY COMMISSION LICENSEE EVEM REPORT CONTROL BL0r.. / / / / / / / (1)

(PLEASE PRI',T OR TYPE ALL REQUIRED INFORMATION)

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/V/A/N/A'd/2/ (2)

/0/0/-/0/0/0/0/0/90/0/ (3)

/4/1/1/1/1/ (4)

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LICENSE', CODE LICENSE NUMBER LT. CENSE TYPE CAT

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DOCKET NUMBER EVENT DATE REPORT DATE EVENT '/ESCRIPTION AND PROBABLE CONSEQUENCES (10)

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/ On Jane 29, 1981, with the Un,1c in cold shutdown, it was discovered that one

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/ trrin of the onsite AC power system had not been tested in accordance with T.S.

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/ 4 8.1.1.2.c.6 (simulating a loss of offsite power coincident with an ESF actua- /

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/_t, ion) since 3-16-b.

Since the periodic test was immediately performed satisfac-/

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/ torily, the health and safety of the general public were not affected.

This

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/ event reportable pursuant to T.S. 6.9.1.9.c.

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3YSTEM

CAUSE

CAUSE COMP.

VALVE

OlW.

CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

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/E/B/ (11) LA/ (12) LB/ (13) /G/E/N/E/R/A/ '

'+)

LD/ (15) g/ (16)

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

CODE TYPE NO.

(17) tEPORT IUMBER

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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 LX/ (18) LZ/ (19) LZ/ (20) LZ/ (21) /0/0/0/0/ (22) g/ (23) LN/ (24) g/ (25) /F/0/1/0/ (26 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (27)

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/ The periodic test was not performed because the individual responsible for

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/ scheduling the periodic test was under the impression that both busses were

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/ retested on 3-31-80; however, only the "H" bus was tested. The "J" bus was

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/ immediately tested and found to be satisfactory.

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FACILITY METHOD OF STATUS

% POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION (32)

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M/ (28)

/0/0/0/ (29) / Trip Recovery / (30)

LB/ (31)

/ Surveillance Testing

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ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY (35)

LOCATION OF RELEASE (36)

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g/ (33)

LZ/ (34)

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PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION (39)

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PERSONNEL INJURIEG NUMBER DESCRIPTION (41) i

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LOSS OF OR DAMAGE TO FACILITY (43)

TYPE

DESCRIPTION

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/Z/ (42)

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PUBLICITY ISSUED DESCRIPTION (45) 8107310390 810717 NRC USE ONLY PDR^DocaOsOooy

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/N/ (44) L NA NAME OF PREPARER W. R. CARTWRIGHT PHONE (703) 894-5151

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

Attachment:

Page 1 of 1 Docket No. 50-339 Report No. LER 81-054/03L-0

Description of Event

On June 29, 1981 with Unit 2 at cold shutdown, it was determined that one train of the onsite AC po.wer system had not been tested in accordance with the required 18 month surveillance.

The surveillance that was not performed was a simulated loss of offsite pcwer coincident with an ESF action on the "J" emergency bus (T.S. 4.8.1.1.2.c.6).

Probable Consequences of Occurrence On June 30, 1981, the "J" emergency bus was tested and all equipment functioned properly.

Each individual piece of ESF equipment is tested functionally for loss of power and degraded grid on a two month period.

In addition, each emergency dicsel generator is scheduled to be started by a simulated loss of offsite power in conjunction with an ESF actuation signal at least once per 124 days.

Both emergency busses were operable and the health and safety oi the general public were not affected.

Cause of Event

Both busses were tested pre-operationally on March 16, 1979.

The "H" emergency bus was retested on March 31, 1980.

Both trains were inadvertently scheduled to be tested on September 30, 1981, 18 months from the "H" bus test.

Immediate Corrective Action

The "J" emergency bus was tested satisfactorily on June 30, 1981.

Scheduled Corrective Action Both busses were tested during this cold shutdown and will be scheduled to be performed during the next refueling outage.

Actions Taken to Prevent Recurrence No further action is required.

Generic Imflications There are no generic implications.