ML18127A654

LER 1978-023-00 for St. Lucie Unit 1, on 05/15/78 Concerning During Testing Humidity Control Heaters on the Shield Bldg Ventilation System (B Train) Tripped on High Temperatures Due to High Temperature Caused by Low Flow

ML18127A654
Person / Time
Site:	Saint Lucie
Issue date:	07/13/1978
From:	Schmidt A Florida Power & Light Co
To:	O'Reilly J NRC/RGN-II, NRC/IE
References
PRN-LI-78-189 LER 1978-023-00
Download: ML18127A654 (5)

Text

REGULATORY INFORMATION DISTRIBUTION SYSTEM (BIDS)

DISTRIBUTION FOR lNCOMING MATERIAL 50-335 REC: QREILLY J P ORG: SCl.lMIDT A D DOCDATE: 07/13/78 NRC FL PWR 8. LIGHT DATE RCVD: 07/31/78 DOCTYPE: LETTER NOTARIZED: NQ COPIES RECEIVED

SUBJECT:

LTR 1 ENCL 1 FORWARDING LICENSEE FVENT REPT (RO 50-335/78-023) ON 0b/15/78 CONCERNING DURING TESTING hUMIDITY CONTROL HEATERS QN ThE SHIELD Bt DG VENTILATION SYSTEM ( "B" TRAIN) TRIPPED ON HIGH TEMPERATURES DUE TO HIGH TEMPERATURE CAUSED BY LOW FLOW..

PLANT NAME: ST LUCIE Oi REVIEWER INITIAL: X JM DISTRIBUTOR INITIAL:PL DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS INCIDENT REPORTS (DlSTRIBUTIQN CODE A002)

FOR ACTION: BR CHIEF QRB04 BC4+W/4 ENCL INTERNAL: REG FI - W/ENCL NRC PDR+4W/ENCL

~~~W/2 ENCL MIPC~~W/3 ENCL I 0 C SYSTEMS BR++W/ENCL EMERGENCY PLAN BR++W/ENCL NOVAK/CHECK4+W/ENCL EEB~~W/ENCL AD FOR ENG~+W/ENCL PLANT SYSTEMS BR++W/ENCL HANAUER4~%W/ENCL AD FOR PLANT SYSTEMS++W/ENCL AD FOR SYS 8. PROJ++W/ENCL REACTOR SAFETY BR>>W/ENCL ENGINEERlNG BR4+W/ENCL VOLLMER/BUNCH+~W/ENCL'QWER KREGER/J. COLL INS++W/ENCL SYS BR<+W/ENCL K SEYFRIT/IE<4W/ENCL EXTERNAL: LPDR S FT PIERCEI FL+>W/ENCL TI C> LIZ CARTER< %W/ENCL NS I C~~~W/ENCL ACRS CAT B+4W/16 ENCL DISTRIBUTION: LTR 45 ENCL 45 CONTROL NBR: 782140 97 SIZE: iP+1P THE LND

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FLOIIIOA POWEII IIt LlGHT COMPANY PRN-LX-78-189

'July 13, 1978 Mr. James P. O'Reilly, Director, Region II Office of Inspection and Enforcement U. S.. Nuclear Regulatory Commission CJ r

230 Peachtree Street, N. W., Suite 1217 Wf

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Dear Mr. O'Reilly:

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W-0 REPORTABLE OCCURRENCE 335-78-23 n IC I,

ST. LUCXE UNXT 1 CO CI DATE OF OCCURRENCE: JUNE 15, 1978 TECHNXCAL SPECXFICATION 3.6.6.1 SHIELD BUXLDXNG VENTILATION SYSTEM The attached Licensee Event Report is being submitted in accordance with Technical Specification 6.9 to pro-vide 30-'day notification of the subject occurrence.

Very truly yours, A. D. Schmidt Vice President Power Resources MAS/mal Attachment CC Harold F. Reis, Esc(uire Director, Office of Xnspection and Enforcement (30)

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

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Durin testin the humidit control heaters on the shield building

~g g ventilation system ("B" train) tripped on high temperature. Also, low flow alarms were received and Shield Building vacuum was less 9 than e ected. 'This indicated that the "B" train was not fully operable Q '3 and required ACTION in accordance with Speci'fication 3;6.6.1. This is.

the first event of this type.

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SYSTEM CAUSE CAUSE COMP. VAI.VE Cooc COOS SUSCQOE CCMPOHfNTCQQE SVSCQOS SVSCQQS

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~IO 21 22 . 23 24 26 21 cs 29 J0 32 ACTION FUTURE EFFECi SHVTQQwN ATTACHMENT IPRQA PRIME COMA, CQVPQNENT TAKEN ACTIQII CN PLANT SIETHQQ ~OURS +22 suoi4ITTEQ FOHMSV8. SVPPLIfR MANUFA TURER LJSLUS LJS JJ 34 JS MS 36 31 40 LJS cl jxjS O'3 I IS ~4 47 CAUSE OESCAIPTION ANO CORREL i IVE ACTIONS Q27 o The heaters tripped properly due to high temperature caused by low flow The adjustment on tile throttled motor operated outlet damper was reset and proper flow verified on the "B" train (and the "A" train) in 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />."., which was well within tt3e time limit.

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