ML19294B529

LER 80-007/03L-0:on 800130,during Daily Plant Operating Surveillance SP-300,discovered Average Reactor Bldg Temp of 130.5F.Caused by Temp Transmitter CI-563-TT Being Stuck,Due to Operation Outside Design Temp Range

ML19294B529
Person / Time
Site:	Crystal River
Issue date:	02/20/1980
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19294B528	List: ML19294B527 ML19294B529
References
CS-80-62, LER-80-007-03L, LER-80-7-3L, NUDOCS 8003040655
Download: ML19294B529 (2)

Text

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6l OOCa ET NOMSER *wl 99 EVENT 4%TE 4 3 AEPOMT D A T E 80 EVENT OESCRIPfloN AND pro 8AOLE CONSEQUENCES h o 2 At 1610 while performing Daily Plant operat ing Surveillance S-300, it i

o ;3; ; was discovered that the average Reactor Building temperature was 130.5 F4 r iTO I This created an event contrary to Technical Specification 3.6.1.5. l firTq l Redundancy NA No effect upon the plant or general public. Reactor i o ,; Building cooling was shif ted to SW system cooling to reduce Reactor 1 l0l,ll Building temperature. This is the second occurrence of this type re- l 2is l ported. Reference LER 79-90. I F 9 9 N SYSTEM C AUSE CAUSE COvp COOE CODE VAME Sv9 CODE COvPONENT CODE StacODE SU8COCE o 9 7 9 lS l B l@ W@ [EJ@ l IIN l S l TlR l Ul@ Q@ LZJ @

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4} 44 47 i o The cause of this event is attributed to temperature transmitter CI-563-1 TT. Investigation revealed transmitter was stuck due to being operated Ii1i11 , , , e a a ., 4. um e ,- n ,. , e . , ,. m , ,, m ma c,,knm,- 7 c,4'e r -m e s I O factorily start an industrial cooling fan on rising Reactor Building I

..eu a m u. 216 03-I'" ~ i g ve m o mu au .a mau g auaa &~ euca gl which resulted in an overrange condition. CI-563-TT was adjusted and j returned to service on 1/31/ 80 and MAR 79-11-76 was initiated to properly 8l nrotocero i

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SUPPLEMENTARY INFORMATION Report No.. 50-302/80-007/03L-0 Facility: Crystal River Unit #3 Report Date: 20 February 1980 Occurrence Date: 30 January 1980 Identification of Occurrence: g contrary to Technical Specification 3.6.1.5.

Conditions Prior to Occurrence:

Mode 1 power operation (100%)

Description of Occurrence:

At 1610 while performing Daily Plant Operating Surveillance SP-300, it was discovered that the average Reactor Building te=perature was 130.5 F. Reactor Building cooling was shifted to the S.W. system and the temperature was reduced to 125 F at approximately 1620. Rea'ctor Building cooling was returned to normal and the industrial cooling fans were placed in manual. Maintenance actions were initiated.

Designation of Apparent Cause:

The cause'of this event is attributed to temperature trans-mitter CI-563-TT. Investigation revealed transmitter was stuck due to being operated outside its design temperature range and subsequently failed to satisfactorily start an industrial cooling fan on rising Reactor Building temperature.

CI-563-TT is improperly located in the process flow path which resulted in an overrange condition. CI-563-TT was adjusted and returned to service on 1/31/80 and >Uut 79-11-76 was initiated to properly relocate the transmitter during the next refueling outage.

Analysis of Occurrence:

No effect on the p1sst or general public.

Corrective Action:

CI-563-TT was adjusted and returned to service on 1/11/80 and MAR 79-11-76 was initiated to relocate the transmitter during the refueling outage. Modification 79-10-79 has been initiated to provide an average Reactor Building temperature alarm function to alert the Control Operator prior to exceeding the 130 F limit. This modification will be completed during the upcoming refueling outage.

Failure Data:

This is the second occurrence of this type reported.

Reference 79-90.

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