05000251/LER-1986-020, Forwards LER 86-020-01.Rept Submitted as LER 86-21 on 861027 W/Ltr L-86-442.Event Should Have Been Reported as LER 86-20. Rev Corrects Numbering Discrepancy & Coding Errors

Forwards LER 86-020-01.Rept Submitted as LER 86-21 on 861027 W/Ltr L-86-442.Event Should Have Been Reported as LER 86-20. Rev Corrects Numbering Discrepancy & Coding Errors

ML20207A136
Person / Time
Site:	Turkey Point
Issue date:	10/31/1986
From:	Woody C FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF ADMINISTRATION (ADM)
Shared Package
ML20207A138	List: 05000251/LER-1986-020, Forwards LER 86-020-01.Rept Submitted as LER 86-21 on 861027 W/Ltr L-86-442.Event Should Have Been Reported as LER 86-20. Rev Corrects Numbering Discrepancy & Coding Errors
References
L-86-450, NUDOCS 8611050117
Download: ML20207A136 (1)

LER-2086-020, Forwards LER 86-020-01.Rept Submitted as LER 86-21 on 861027 W/Ltr L-86-442.Event Should Have Been Reported as LER 86-20. Rev Corrects Numbering Discrepancy & Coding Errors

Event date:
Report date:
2512086020R00 - NRC Website

text

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c esRC Fe,m 384 U.S. NGCLE A A E E LUL ATOiv COMMIS510N

, APPROVED OMB NO. 3150 4104 LICENSEE EVENT REPORT (LER) '"a a ' 5 "' "

F ACILITY NAME (19 DOCKET NUMBER (2) PAGE43s Turkey Point 4 o 15 I o Io I o 121511 1loFlQ2 TITLE tes Out of Service Steam Generator Blowdown Valve Not Isolated Within Required Time EVENT DATE 156 LER NUweER!6) REPORT DATE 171 OTHER F ACILITIES INVOLVED 181 MONTH YEAR I O MONTH DAY YEAR f ACt LIT Y N AMES DOCKET NUMBERtSi DAY YEAR n' '

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C9 26 86 86g - - 01 86 None l 0l2 f 1l 0 3l1 g ,

Twis REPORT is susMiTTED PURSUANT TO Twt REQUIREMENTS OP 10 CPR I (Check one e, more of ,ae fenowat Illi MODEMI 20 402(b) 20 406tel 60.73teH2Hevi 73.71101 1

R 20 406teH11til 50.36feH1D 50.731aH2Het 73.71(al no, i i 20 m.HiH . .0 3.i.H2i .On.H2H.o g,Egs,.cg. g 50.73feH21(cullAl J66At 20 4061aH11tei) 1 60 73(ell 2Hi) 20 406tsH1Hevi 50.73teH2Hal 50 73feH2ltchitBI 20 406telt1Hel 50 73(all2Hns) 90.73(a#12Hal LICENSEE CONTACT FOR THl$ LER 4121 NAME TELEPHONE NUV8ER aE A COoE G. Salamon 31 015 2i 4i 6l i 1 3:0 0 1 1 COMPLETE ONE LINE FOR E ACH COMPONENT F AILURE Of SCRIBED IN THl3 REPORT (131

"# AC REP "# AC REP 8 CAUSE SYSTEM COuPONEN* 7y yO NPRD$ CAUSE SYSTEU COvPONENT 7 g O NPR C WIT II SI V I H111913 Y I I I I I I I X Sid TI SlV l Pl013 I ? Y l I f I I I I SUPPLEMENTAL REPORT EXPECTED 114' UONTw DAY YEAR SV9MtSS'ON YEs fif ve, com,re,e EM9ECTED $U3ectSitON OATEI NO , , ,

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Event:

On September 26,1986, at 0035, and on October 6,1986, at 0457, blowdown isolation valves failed closed. Technical Specifications (TS) require the isolation of the affected penetrations within four hours. Power to the failed valves was isolated at 0605 on September 26, 1986, and at 1030 on October 6,1986, respectively, thus not meeting the TS requirements.

Cause of Event:

The cause of the event was personnel error in that the 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> time limit to isolate the penetration was not met. The root cause for the failure of these valves was water from a leaking feedwater valve.

Corrective Action:

1) The personnel involved were counseled to exercise greater care in ensuring compliance with the applicable Technical Specifications.

2) The failed valves were repaired or replaced.

3) The leaking valve is being repaired.

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8611050117 861031 PDR

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ADOCK 05000251 PDR I /

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e o-NRC Form 386A US. NUCLEAA LETULJ. TORY COMutS$10N F . . ~ LICEN!EE EVENT REPORT (LER) TEXT CONTINUATION ArezovEO ous No. 3 so-oio4 EXPIRES: 8/31/88 FACILITY NAME lil DOCKET NUMBER (2) PAGE (3)

LER NUMSER 18) vsaa " ROW 4*7J.?:

Turkey Point Unit 4 TEXT W more spece is rogured, see adeconsf NRC form Je$ Cst (17) o l5 l0 lo lo l2 l5 [1 8[ 6 -

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Oil 012 OF 0l2 j' Event:

On September 26,1986, at 0035, a blowdown isolation bypass valve (valve SV-4-62758-1) failed closed. Technical Specifications (TS) 3.3.3.b and 3.3.3.c require the isolation of any penetration which receives the Containment Phase A, Phase B, or Containment Ventilation isolation signal if the valve is inoperable. This isolation is to be accomplished within four (4) hours after the volve is found inoperable. Power to the failed valve was isolated at 0605 on September 26, thus exceeding the 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> limit by I hour and 30 minutes. On October 6,1986, at 0457, blowdown isolation valve CV-4-6275C and blowdown isolation bypass valve SV 6275C-l failed closed. Power to the failed valve was isolated at 1030 on October 6, thus exceeding the 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> limit by I hour and 33 minutes. The valves were repaired or replaced and returned to service at 1045 on September 26, and at 1614 on October 6, respectively.

Cause of Event:

The cause of the event was personnel error in that the 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> time limit to isolate the penetration was not met. The cause of the failure of the above volves was water shorting out the solenoid. . The source of the water was a leaking valve in one of the Steam Generator Feedwater Pumps' suction line (valve 4-20-113).

Analysis of Event:

During the event, the redundant isolation valves for the affected penetrations remained operable. Based on the above, the health and safety of the public were not affected.

Corrective Action:

1) The personnel involved were counseled to exercise greater care in ensuring compliance with the applicable Technical Specification requirements.

2) Valve SV-4-62758-1 was replaced.

3) Valve 4-20-113 is being repaired in order to eliminate the source of the water.

Additional Inf ormation:

Manufacturer: Blowdown isolation volve: Ralph A. Hiller Co. Model: 16SA-A021 Feedwater Pump suction valve: Manufacturer: Pacific Valves / Mark Controls Corp. Model 350-7WE-BC Similar Events: None g,o. ..

.-

• P. O. BOX 14000, JUNO BEACH, FL 33408 h*- >i FLORIDA POWER & LIGHT COMPANY OCTOBER 3 1 1986~

L-86-450 U. S. Nuclear Regulatory Commission -

Document Control Desk Washington, D. C. 20555 Gentlemen:

Re: Reportable Event 86-20 Revision i Turkey Point Unit 4 Dat. . of Event: September 26,1986 Out of Service Steam Generator Blowdown Valve Not isolated Within Required Time The attached Licensee Event Report is being submitted pursuant to the requirements of 10 CFR to provide notification of the subject event.

This report was previously submitted as LER 86-21 on October 27,1986 with our letter L-86-442. The event should have been reported as LER 86-20. This revision corrects the' numbering discrepancy and coding errors.

Very truly yours,

. O.

Group Vice President Nuclear Energy COW /RG/gp Attachment cc: Dr. J. Nelson Grace, Region 11, USNRC Harold F. Reis, Esquire t

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( RG3/002/l PEOPLE. . SERVING PEOPLE