ML18227A508

Transmittal of Licensee Event Report 251-77-2 Boric Acid Transfer Pumps

ML18227A508
Person / Time
Site:	Turkey Point
Issue date:	05/13/1977
From:	Schmidt A Florida Power & Light Co
To:	Moseley N Office of Nuclear Reactor Regulation
References
LER 251-077-02
Download: ML18227A508 (7)

Text

U.S. NUCLEAR REGULATORY COM ON DOCKET NUMBER

'NRC FORM 195

[I2-76) QO-< S FILE NUMBER NRC DISTRIBUTION FQR PART 50 DOCKET MATERIAL INCIDENT REPORT

,TO: FROM: DATE OF DOCUMENT Mr. Norman C. Moseley FPL 5-13-77 Miami, Fla. 33101 DATg RjfEJPPD A.D.Schmidt ETTE R CI NOTOR IZ E D PROP INPUT FORM NUMBER OF COPIES RECEIVED j5OR IG INAL QCOPV NC LASS IF I E D S/c wN ENCLOSURE Ltr trans the following: ,

(lp) Lic. Event Report 772-2 on 4-15-77 concerning failure ofthe boric acid transfer pump....'. (2P)

(1 cy encl rec'd)

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PLANT NAME: Turkey Pt Uni.t 4

. Bo NOT RE~oyg NOZE: IF PERSONNEL EXPOSURE IS INVOLVED DHL 6-24-77 SEND DIRECTLY TO KREGER/J~ COLLINS FOR ACTION/INFORMATION BRANCH CHIEF:

W 3 CYS FOR ACTION LIC ASST,:

W YS ACRS CYS HORBXNG S NT INTERNAL DISTRIBUTION REG FIL DR I,&.E 2 MIPC SCHROEDER/IPPOLITO HOUSTON NOVAK/CHECK GRIMES BUTLER HANAUER TEDESCO/MACCARY EISENHUT BAER SHAO VOLLMER/BURGH KREGER/J COLLINS EXTERNAL DISTRIBUTION CONTROL NUMBER LPDR0 TIC:

N NRC FORM 195 (2-7B)

~ ~ I ~ 0 FLORIDA POWER & LIGHT COMPANY May 13, 1977 P 7-'1'44 '"

Mr. Norman C. Moseley, Director, Region Office of Inspection and Enforcement II U. S. Nuclear Regulatory Commission 230 Peachtree Street, N. W., Suite 1217 Atlanta, Georgia 30303

Dear Mr. Moseley:

REPORTABLE OCCURRENCE 251-77-2 TURKEY POINT UNIT 4 DATE OF OCCURRENCE: APRIL 15, 1977 BORIC ACID TRANSFER PUMPS The attached Licensee Event Report is being submitted in accordance with Technical Specification 6.9.2 to provide 30-day notification of the subject occurrence.

Very truly yours, D. Schmidt Vice President Power Resources MAS/cpc Attachment cc: Robert Lowenstein, Esquire Director, Office of Inspection and Enforcement (30)

Director, Office of Management Information and Program Control (3) f1'l n i PEOPLE... SERVING PEOPLE

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. 'ENSEE EVENT REPORT CONTROL BLOCK: (PLEABE PRINT ALL RMUIRED INFORIVIATION) 1 UCENSEE UCENSE EVENT NAME LICENSE NUMBER TYPE TYPE 01 F L T P S 4 0 0 0 0 0 0 0 0 0 4 1 1 1 1 ~03

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.7 89 14 15 25 26 30 31 32 REPORT REPORT CATEGORY TYPc SOURCE ~

OOCKET NUMBER ~ EVENT DATE REPORT OATE I001]OON'T L ~L 0 5 0 0 2 5 1 0 4 1 5 7 7 0 5 1 3 7 7 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION

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~0 2 When both Unit 3 and Unit 4 are o eratin Technical S ecification 3.6.c.2 re uires at 7 8 9 ,

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[ODQ least three o erable boric acid transfer BAT um s. For a roximatel 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br /> 7 8 9 80 7 8 9 ri fro  : 0 .m. on A ril 15 to 2:30 .m. on A ril 17 onl two BAT 80

[oas] w o rab e. Te hnical S ecification 3.6.d.2 ermits one of the three re uired 7 8 9 80 IE3 7 8 9 FRME 80 SYSTEM CAUSE COMPONENT CCMFONENT COOE COOE COMPONENT COOE SUFPUER MANUFACTLRER

[oo7I ~PC ~E P U M P X X N C 3 0 0 N 7 8 9 10 11 12 17 44 47 48 CAUSE DESCRIPTION Qg8 The o eratin histor of the t e um currentl installed shows a hi h incidence of 7 9 80

[OD9] r a 7 8 9 Qg thermal insulation of the um motor and 2 thrust imbalance caused b an external 7 89 FACXlTY McTHOO OF 80 I011I 7 8 STATUS 9

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~oo 9C POWER 12 13 OTHER STATUS 44 OISCOVERY 45 46 OLOCOVERY OESCRIPTION NA-80 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE AMCUNT OF ACTIVITY LOCATION OF RELEASE 7

OH 8 9 L~J Lil 10 11 NA NA PERSONNEL EXPOSURES NUMBER TYPE OESCRIPTION Qg ~oo ~z NA 7 89 11 12 13 BD PERS'ONNEL INJURIES NUMBER DESCRIPTION Q4] ~0 7 89 11 12 80 PROBABLE CONSEQUENCES Q~g 7 89 80 LOSS OR DAMAGE TO FACILITY TYPE OESCRIPTION

~z NA 7 89 10 80 PUBLICITY 7 89 ADDITIONAL FACTORS

~18, 7 8 9 p for o i ua io of Fve t Des ri tion e i io 80 7 89 80 NAME M. A. Scho man CPO Se'I ~ 0 qT

REPORTABLE OCCURRENCE 251-77-2 LICENSEE EVENT REPORT PAGE TWO EVENT DESCRIPTION (Continued)

The sequence of events was as follows:

(1) At 9:30 p.m., 4/15/77, the 4A and 4B BAT pumps failed to start for normal makeup. Concentrated boric acid supply was available to Unit 4 via the 3A and 3B BAT pumps.

(2) At 3:30 a.m., 4/16/77, the 4A BAT pump was test run satisfactorily after preliminary investigation and returned to operable status.

The 4B BAT was isolated for major maintenance.

(3) At 2:30 a.m., 4/17/77, the 4A BAT pump tripped on thermal overload and was declared inoperable.

(4) The 4B BAT pump was rebuilt and returned to operable status at 2:30 p.m., 4/17/77.

CAUSE DESCRIPTION (Continued) equalizing line (used for pump thrust balance) becoming blocked by boric acid crystals. ,A design change for installation of a different type pump is currently under review.

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