05000338/LER-1980-105-03, /03L-0:on 801218,level in 1C Safety Injection Accumulator Dropped Below Tech Spec 3.5.1 Min Level.Caused by Operator Error During Filling Operation.Level Restored

/03L-0:on 801218,level in 1C Safety Injection Accumulator Dropped Below Tech Spec 3.5.1 Min Level.Caused by Operator Error During Filling Operation.Level Restored

ML19351F586
Person / Time
Site:	North Anna
Issue date:	01/06/1981
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19351F539	List: 05000338/LER-1980-105, Forwards LER 80-105/03L-0 05000338/LER-1980-105-03, /03L-0:on 801218,level in 1C Safety Injection Accumulator Dropped Below Tech Spec 3.5.1 Min Level.Caused by Operator Error During Filling Operation.Level Restored
References
LER-80-105-03L, LER-80-105-3L, NUDOCS 8101130542
Download: ML19351F586 (2)

LER-1980-105, /03L-0:on 801218,level in 1C Safety Injection Accumulator Dropped Below Tech Spec 3.5.1 Min Level.Caused by Operator Error During Filling Operation.Level Restored

Event date:
Report date:
3381980105R03 - NRC Website

text

.

U.S. NUCZ. EAR REGUZ.AT0h.' COMMISSXON C0hTROL BLOCK / / / / / / / (1)

(PLEASE PRINT OR TYPE ALL REQUIRED IhTORMTION)

/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 NLMBER LICENSE TYPE CAT

/0/1/

/L/ (6)

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

/1/2/1/8/8/0/.(8) / n/ 3/ c/ e/ g/i/ (9)

DOCKET NLMBER EVENT DATE REPORT DATE EVENT DESCR!" TION AND PROBABLE CONSEQUENCES (10)

/0/2/

/

On December 13, 1980 while in Mode 1 operation, the level in 1C Safety Injec- /

/0/3/

/

tion Accumulator dropped below the T.S. 3.5.1 minimum level by 9*..

The level /

/0/4/

/

was restored to within T.S. limits within I hour as allowed by the action

/

/0/5/

/

statement. Therefore, the health and safety of the public are not affected.

/

/0/6/

/

/

/0/7/

/

__/

/0/8/

/

/

SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

/0/9/

/S/F/ (11) /A/ (12) /A/ (13) /A/C/C/U/M/U/ (14) LZ/ (15)

[Z/ (16)

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

CODE TYPE NO.

(17) REPORT NUMBER

/8/0/

/-/ /1/0/5/

/\\/

/0/3/

/L/

/-/

[0/

ACTZON FLTURE EFFECT SHLTDOWN ATTACHMENT NFRD-4 PRIME COMP. COMP 0hTNT TAKEN ACTION ON PLAh7 METHOD HOURS SUBMITTED FORM SUB. SUPPLIER MANLTACTURER [H[ (18) /Z/ (19) /Z/ (20) /Z/ (21) /0/0/0/0/ (22) [][/ (23) /N/ (24) [NL (25) /Z/Z/Z/Z/(26)

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (27)

/1/0/

/

This event was caused by operator error during a filling operation. The level /

/1/1/

/

was restored to within T.S. limits in about 9 minutes.

/

/1/2/

/

/

/1/3/

/

/

/1/4/

/_

/

FACILITY LIETHOD OF STATUS

• POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION (32)

/1/5/

[E/ (28)

/0/6/1/ (29) /

NA

/ (30) /B/ (31) / Operator Observation /

ACTIVITY C0hTEh7

(

RELEASED OF RELEASE AMOUNT OF ACTIVITY (35)

LOCATION OF RELEASE (36) t

/1/6/

LZ[ (33)

LZ[ (34) /

NA

/

/

NA

/

PERSONNEL EXPOSURES NLHBER TYPE DESCRIPTION (39)

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

NA

/

PERSONNEL INJURIES i

NLHBER 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/

g (44) /

NA

/////////////

NAME OF PREPARER W. R. CARTWRIGHT PHONE (703) 894-5151 81011806 %

Virginia Electric and Power Company North Anna Power Station, Unit 1 Attachment: Page 1 of I Docker No. 50-338 Report No. LER 80-105/03L-0

Description of Event

During a sluicing operation to restore level in 1C Accumulator from 1A Accumulator, the drain valve on 1C Accumulator was opened instead of the make-up valve. This resulted in a level decrease to about 9% less than the minimum allowed by T.S. 3.5.1.

Probable Consequences of Occurrence Since the level in 1C Accumulator was restored to within the T.S.

limit within I hour, the consequences of this event are negligible.

Cause of Event

This event was caused by the operator opening the drain valve instead of the make-up valve on IC Accumulator. These valves are operr*.ed from the Main Control Board (Vertical Panel), and are clearly marked with identification numbers and function.

Immediate Corrective Action

The level was restored to within the T.S. limits.

Scheduled Corrective Action No further corrective action is necessary, l

Actions Taken to Prevent Reccurrence The importance of verifying valve nomenclature was emphasized to the Control Room Operator. In addition, a copy of tSis report will be placed in the required reading file for all operations persornel.

Generic Implications There are no generic implications associated with this event.

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