ML19347F869

LER 81-032/03L-0:on 810428,air Flowrate Through Filter Train 1-HV-F-40A of Safeguards Area Ventilation Sys Exceeded Tech Spec.Caused by Improper Positioning of Air Damper.Damper Readjusted

ML19347F869
Person / Time
Site:	North Anna
Issue date:	05/20/1981
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19347F865	List: ML19347F864 ML19347F869
References
LER-81-032-03L-01, LER-81-32-3L-1, NUDOCS 8105260489
Download: ML19347F869 (2)

Text

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U.S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT CONTROL BLOCK / / / / / / / (1) (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

/0/9 /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 dIII /0/5/0/0/0/3/3/8/ (7) /0/4/2/8/8/1/ (8) /0 /s /2 /0 /8 /1/ (9)

E [L/ (6) DOCKET NUMBER EVENT DATE REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES (10)

/0/2/ / On April 28, 1981, during Mode 1 operation, one of the two Safeguards Area / ,

/0/3/ / Ventilation Systems was delcared inoperable when the air flowrate was deter- /

/0/4/ / mined to be higher than allowed by T.S. 3.7.8.1. The flowrate was adjusted to /

/0/5/ / 6,300 cfm i 10% by repositioning the air damper within 7 days. Therefore, the /

/0/6/ / health and safety of the public were not affected. This item is reportable /

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

/0/8Z / /

SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

/0/9/ /A/A/ (11) g/ (12) [X/ (13) /Z/Z/Z/Z/Z/2/ (14) LZ/ (15) LZ/ (16)

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

(17) REPORT ,

_- NUMBER /8/1/ /-/ /0/3/2/ /\/ /0/3/ LL/ /-/- g/

ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRD-4 PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS SUBMITTED FORM SUB. SUPPLIER MANUFACTURER LE/ (18) g/ (19) g/ (20) LZ/ (21) /0/0/0/0/ (22) LY/ (23) g/ (24) [A/ (25) /S/4/2/0/ (26)

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (27)

/1/0/ / This event was caused by the improper positioning of the ventilation system air /

/1/1/ / damper. The damper was readjusted and the flowrate established at 6,300 cfm /

/1/2/ / 10%. /

/1/3/ / /

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/1/4/ /

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FACILITY METHOD OF STATUS  % POWER OTHER STATUS DISCOERY E SCR E ON (32) l /1/5/ /E/ (28) /1/0/0/ (29) / NA / (30)DISCOERY

[A/ (31) / PERIODIC TESTING /

ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY (35) LOCATION OF RELEASE (36) i /1/6/ [Z/ (33) LZ/ (34) / NA / / NA /

PERSONNEL EXPOSURES NUMIER TYPE DESCRIPTION (39) l

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

PERSONNEL INJURIES NUMBER DESCRIPTION (41)

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

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LOSS OF OR TYPE DAMAGE TO FACILI'IY (43)

DESCRIPTION

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

PUBLICITY ISSUED DESCRIPTION (45) NRC USE ONLY

/2/0/ /N/ (44) / /////////////

NAME OF PREPARER W. R. CARTWRIGHT PHONE (703) 894-5151 8105260 M .

e_-- . ,

Virginia Electric and Power Company North Anna Power Station, Unit #1

Attachment:

Page 1 of I Docket No. 50-338 Report No. LER 81-032/03L-0 Description of Event

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On April 28, 1981 while performing the Safeguards Area Ventilation System (SAVS) periodic test, it was determined that the flowrate through the HEPA and enarcoal filters was about 10,000 scfm. The filter traia affected (1-HV-F-40A) was declared inoperable as per T.S. 3.7.8.1.

Probable Consequences of Occurrence The SAVS ensures that radioactive materials leaking from ECCS equipment within the safeguards area following a LGCA are tiltered prior to reaching the environoent. Since the redundant train remained operable and the affected train flowrate was restored to within the requirements of T.S. 3.7.8.1, the health and safety of the public were not affected.

Cause of Event The improper flowrate in_the-SAVS-was-due-to-the-improper p6'sitioniEg of the air damper to the filter fan 1-HV-F-40A.

Immediate Corrective Action The air flowrate was adjusted to within the T.S. 3.7.8.1 limit by repositioning the air damper._

Scheduled Corrective Action No further corrective action required.

Actions Taken to Prevent Recurrence No further action required.

Generic Implications This event has no generic implications.

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