ML20024C294

LER 83-044/03L-0:on 830526,during Mode 3,one Recirculation Valve on Each of Two Casing Cooling Pumps Found Open.Caused by Procedure Inadequacy.Valves Closed Immediately.Maint Procedure Will Be revised.W/830623 Ltr

ML20024C294
Person / Time
Site:	North Anna
Issue date:	06/23/1983
From:	Harrell E VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
LER-83-044-03L, LER-83-44-3L, N-83-086, N-83-86, NUDOCS 8307120491
Download: ML20024C294 (3)

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U.S. NUCLEAR REGULATORY COMMISSION

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LICENSEE EVENT REPORT CONTROL BLOCK /./ / / /../ / (1) (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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../0/1/.  :/V/A/N/A/3/2/ (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 N R A/ (6) /0/5/0/0/0/3/3/9/: (7) /0/5/2/6/8/3/ (8) - A) A /2 /3 4 /3 / -(9)

DOCKET NUMBER EVENT DATE REPORT DATE

" EVENT DESCRIPTION AND PROBABLE CONSEQUENCES-(10)

.- ' /0/2/' / On May 26, 1983, with Unit-2 in Mode 3 one recirculation valve on each of-two /

'/0/3/ ' / Casing Nooling Pumps was found open. These open valves would have provided a /

/0/4/ / parallel flow path and substantially reduced the' casing cooling flow available to/

/0/5/: / the outside Recirculation Spray Pumps. The valves were open only seven days and /

/0/6/- / Unit 2 was in Modes 3, 4 and 5 during~this period'; therefore, the~ health and /.

-/0/7/ / safety of the general public were not affected. The' event is reportable by / .-

/0/8/ / T.S.l3.6.2.2 and 6.9.1.9.b. /

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

/0/9/ /S/B/ (11) ]D/ (12) -/Z/ (13) /V/A/L/V/E/X/ (14) '/E/ (15) .]DJ (16)

SEQUENTIAL OCCURRENCE REPORT REVISION I~

LER/R0 EVENT YEAR REPORT NO. CODE TYPE NO.

,. (17) . REPORT .

j NUMBER' /8/3/  :/-/ /0/4/4/ /N/ /0/3/ /L/ /-/ /0/

3 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRD-4 PRIME COMP. COMPONENT

. 'TAKEN- ACTION ON. PLANT. METHOD HOURS SUBMITTED FORM SUB. SUPPLIER MANUFACTURER.

. /E/ (18) /Z/ (19) -/Z/ (20) /Z/ (21) /0/0/0/0/ _ (22) /Y/ (23) /N/ (24) /A/ (25) /W/0/3/0/ (26)

J CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (27) l /1/0/ / The valves were left open following maintenance to replace the valve packing one /

'/1/1/ . / week prior to the discovery. The cause was determined to be procedure inadequacy./

/1/2/ / The valves were closed immediately. The maintenance procedure will be revised to/

/1/3/ / ensure that valves are left in the correct p'sition o following maintenance. /

/1/4/ / /

FACILITY METHOD OF STATUS  % POWER DISCOVERY DISCOVERY DESCRIPTION. (32)

. /1/5/- /C/ (28) .

/0/0/0/ (29) / OTHER NA STATUS (

/ /B/ (31) / Periodic Surveillance /

4 ACTIVITY CONTENT

RELEASED OF RELEASE AMOUNT OF ACTIVITY (35) LOCATION OF RELEASE (36) 4

/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 4

NUMBER DESCRIPTION (41)

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

LOSS OF OR DAMAGE TO FACILITY TYPE- DESCRIPTION 4

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

PUBLICITY 4

ISSUED DESCRIPTION (45) NRC USE ONLY j /2/0/ ./N/ (44) ./ NA /////////////

2 NAME OF PREPARER E. Wayne Harrell PHONE (703) 894-5151

)' r307120491 830623 PDR ADOCK 05000339 8 PDR

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Virginia Electric and Power Company North _ Anna Power-Station, Unit No. 2

Attachment:

Page 1 of 1 Docket No. 50-339-

Attachment to LER 83-044/03L-0 Description of Event On.May 26, 1983, with Unit 2 in Mode 3 one recirculation valve on

-each of.two Casing Cooling Pumps was found open. These normally closed four inch valves bypass the ~ normal recirculation line. 'This event.is reportable pursuant to T.S. 6.9.1.9.b.

Probable Consequences of Occurrence The casing cooling flow available to the Outside Recirculation Spray-Pumps _would have been substantially reduced with_the recirculation bypass valves open. Since the valves were only open seven-days and the

. Unit was.in Modes 3, 4-and 5 during the period, the health and safety of the general public were not affected.

Cause of Event The valves were verified to be shut on May l'8, 1983 during the performance of two periodic tests. On May - 19, .1983 the valves were placed on their backseats by maintenance personnel to replace the packing. After maintenance the valves were _ cycled by maintenance personnel as required by the maintenance procedure. The valves were left in the open position following maintenance due to procedural inadequacy.

Immediate Corrective Action The. valves were closed immediately.

t Scheduled Corrective Action The maintenance procedure will be revised to ensure that valves are left in the correct position after maintenance.

Action Taken To Prevent Recurrence No further action is required.

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

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USNRC REGION I ATl. A NT,t 7FORGIA VIRGINI A ELECTRIC AND POWER COMP ANY NORTH ANN A POWER ST ATION P. O. BOX 402 MINERAL, VIRGINI A 23117 June 23, 1983 Mr. James P. O'Reilly, Regional Administrator Serial No. N-83-086 U. S. Nuclear Regulatory Commission N0/DAH: 11 Region II Docket No. 50-339 101 Marietta Street, Suite 2900 Atlanta, Georgia 30303 License No. NPF-7

Dear Mr. O'Reilly:

Pursuant to North Anna Power Station Technical Specifications, the Virginia Electric and Power Company hereby submits the following License Event Report applicable to North Anna Unit No. 2.

Report No. Applicable Technical Specifications LER 83-044/03L-0 T.S. 6.9.1.9.b This report has been reviewed by the Station Nuclear Safety and Operating Committee and will be forwarded to Safety Evaluation and Control for their review.

Very Truly Yours, E. Wayn rell Station Manager Enclosures (3 copies) cc: Document Control Desk (1 copy) 016 Phillips Bldg.

U.S. Nuclear Regulatory Commission Washington, D. C. 20555 gg4;gCIAL C W'

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