ML18127A665

LER 1978-015-00 for St. Lucie Unit 1, on 04/23/78 Concerning Operator Blew Down 1B Bamt Level Instrument to Prevent Sensing Line Blockage, Causing Instrument to Fail High

ML18127A665
Person / Time
Site:	Saint Lucie
Issue date:	05/23/1978
From:	Schmidt A Florida Power & Light Co
To:	O'Reilly J NRC/RGN-II, NRC/IE
References
PRN-LI-78-144 LER 1978-015-00
Download: ML18127A665 (5)

Text

QoC foe/78

'I REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

DISTRIBUTION FOR. INCOMING MATERIAL 50-335 REC: OREILLY J P ORG: SCHMIDT A D DOCDATE: 05/23/78 NRC FL PWR 8( LIGHT DATE RCVD:

06/06/78'OCTYPE:

LETTER NOTARIZED: NO COPIES RECEIVED

SUBJECT:

LTR 1 ENCL 1 FORWARDING LICENSEE EVENT REPT (RO 50-335/78-015) ON 04/Z3/78 CONCERNING OPERATOR BLEW DOWN THE iB BAMT LEVEL INSTRUMENT TO PREVENT SENSING LINE BLOCKAGE CAUSING INSTRUMENT TO FAIL HIGH.

PLANT NAME: ST LUCIE 81 REVIEWER INITIAL: X JM DISTRIBUTOR INITIAL: ~

DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS INCIDENT REPORTS (DISTRIBUTION CODE A002)

FOR ACTION: BR CHIEF ORB04 BC++W/4 ENCL INTERNAL: REG ILE+ /ENCL NRC PDR4~+W/ENCL I 8( 44 Z ENCL MIPC<<W/3 ENCL I 8. C SYSTEMS BR++W/ENCL EMERGENCY PLAN BR>>W/ENCL NOVAK/CHECK44W/ENCL EEB44W/ENCL AD FOR ENG>~W/ENCL PLANT SYSTEMS BR>~W/ENCL HANAUER+4W/ENCL AD FOR PLANT SYSTEMS+<W/ENCL AD FOR OPER TECH+wW/ENCL REACTOR SAFETY BR+~W/ENCL ENGINEERING BR+<W/ENCL VOLLMER/BUNCH+wW/ENCL KREGER/J. COLLINS>+W/ENCL POWER SYS BR++W/ENCL K SEYFRIT/IE4+W/ENCL EXTERNAL: LPDR S FT PIERCEi FL+4W/ENCL TICKS< W/ENCL NS I C++W/ENCL ACRS CAT B4<W/16 ENCL DISTRIBUTION: LTR 45 ENCL 45 CONTROL NBR: 781600308 SIZE: iP+iP 4p THE END 44%4%%%%%%%%%%%%%%%%4%%%%%%

4 FLORIDA POWER 5 LIGHT COi'APANY May 23, 1978 PRN-LX-78-144 f ll C

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Mr. James P. O'Reilly, Director, Region XX Mt > C> C3 U. S. Nuclear Regulatory Commission ~C)~

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230 Peachtxee Street, N.N., Suite 1217 Atlanta, Georgia 30303 Qcn o Wgy

Dear Mr. O'Reilly:

nfl CP REPORTABLE OCCURRENCE 335-78-15 ST. LUCIE UNXT 1 DATE OF OCCURRENCE: APRXL 23, 1978 TECHNICAL SPECIFXCATXON 3.1.2.7 BORXC ACXD MAKEUP TANK 1B The attached Licensee Event. Report is being submitted in accordance with Technical Specification 6.9 to provide 30-Qay notification of the subject occurrence.

Very truly yours, D. Schmidt Vice President Power Resources MAS/mb Attachment cc: Robert Lowenstein, Esquire Director, Office of Xnspection anQ I.'niorcement (30)

Director, Office of Management Xnformation and Program Control,(3.)I

'eiaoo3oe PEOI'LE... SERVING PLOPLE

NRC FORM 366 V. S. NVCl.EAR REGULATORY COMMISSION fT TTl LICEicISEE EVENT REPORT CONTROL BLOCK: I [ I 6

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~04 fter repair and calibration, the BAMT level was found to be below the limit

~QS f T.S.3.1.2.7 because the tank was in service during the occurrence. Level as then restored to within limits. Total time from instrument failure to level restoration was about 21 hours. No positive reactivity changes were 0 6 allowed durin this time.

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~10 The cause of the e ed-hi h indication of the 18 BAHT level instrument was improper operation. After maintenance and recalibration the instrument indicated correctl . The res onsible o erator was thorou h v briefed o the proper operation of this instrument.

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