ML19327C261

LER 89-036-00:on 891018,determined That Plant Operating Outside Design Basis Since Borated Water Storage Tank Level Transmitters Not Seismically Qualified.Caused by Personnel Error.Unqualified Transmitters replaced.W/891117 Ltr

ML19327C261
Person / Time
Site:	Crystal River
Issue date:	11/17/1989
From:	Moffatt L, Widell R FLORIDA POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
3F1189-15, LER-89-036, LER-89-36, NUDOCS 8911220016
Download: ML19327C261 (4)

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r Novenbar 17, 1989 3F1189-15 U.' S. Nuclear Regulatory camission Attention: Document control Desk Washington, D. C. 20555 Subjects Crystal River Unit 3 Docket No. 50-302 Operating License No. DER-72 Licensee Event Report No.89-036 Dear Sir Enclosed is Licensee Event Report (IIR)89-036 Wch is submitted in accordance with 10 CIE 50.73.

Should there be any questions, please contact this office.

l Very truly yours, Rolf C. Widell l Director, Nuclear Operations Site Stgport I

WIR: mag l Enclosure xc: Regional Administrator, Region II Senior Resident Inspector l

l l 8911220016 991117 l hDR ADOCK 05000302 PDC l

POST OFFICE IOX 219

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.UPPLEMENT AL ptPORT 4 KPtC16 0 (14i MONTH day viAn SV.Vi$$ ION YtS 199 res. townse iOfCf(O SVShtISSION ba tti NO l l l A981. ACT ttunit to 0400 nyeren o e . ecoreauneserr dioen e enngre avece troewnten kneal U.i On Octcher 18,1989 at 1810 Crystal River Unit 'Ihree was in OPERATIONAL LODE 1 (10WER OPERATION). At that time it was detennined the plant was operating outside its design basis, N= iuse both of the Borated Water Storage Tank Invel Transmitters which prwide signals to the control room were not seismically qualified.

Unqualilled transmitters had been puzchased and installed because the plant safety listing, which was used to deterinine the purchasing specifications, incorrectly identified the safety function of the transmitters as pressure retention only.

The transmitters have been replaced with qualified transmitters. The safety listing is being reviewed to ensure that similar problems do not exist.

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EVINP IESmIPPICH l

1 och 18, 1989 Crystal River Unit 3 was in OPERATIONAL MODE 1 (KEER l OPERATION) at 94% RATED 'IHERMAL KMER. As part of the corrective actions for ,

violations identified in NRC jnspection 89-200, contract engineers were '

reviewirg moortis of plant equirnent khich had been purchased as ocamercial grade arx1 s ha m mntly qualified for use in safety related arplications. i

[ Airing this prr=a it was disoavend that both Borated Water Storage Tank (BWST) (BP,TK) level transmitters (BP, IIP) which pIUvide signals to the level indicators (BP,U) in th6 control rocn were not seismically aualified. 'Ihese i

transmitte n had been installed, as part of a modification, in April 1989. At 1810 it was determined this constituted operation outside the design basis. ,

'Iberefore, this event is being reported ptrsuant to 10CFR50.73.a.2.ii.B.  !

EVENP ANALYSIS

'Ihe Dorated Water Storage Tank is the main source of water for High Pressure Injection (BQ), Irw Pressure Injection (BP) and Reactor Ik111 ding Spray (BE).

During an accident operators use the INST level to detemine khen to charge the ,

suction for these systems frce the INST to the reactor building sunp (BP,TK). '

only the seismic qualification of the transmitters was inadequate. 'Iberefore, the only time they would be inoperable is following an earthquake. Other INST  :

level indicators, which are seismically qualified, provide signals to the remote shutdown panel. Operators could have used these instruments to monitor BET level following an earthquake if the control room instruments lem inoperable. Because there has been no significant earthquals activity in the plant area, and because the probability of earthquakes in this area is 1cw, there was no reduction in plant safety due to this event.

t CAUSE

'Ihe subject trans.nitters were purchased in 1987. 'Ihe personnel who purchased the transmitters did not specify seismic qualification because the plant safety '

i listing incorrectly identified the safety function of the transmitters as pressure rutention only. In fact the transmitters must moet the requirements of Regulatory Guide 1.97, which include seismic qualification.

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Ol0 013 0F Q CXRRECTIVE ACTION ,

The unqualified transmitters have been replaced with qualified transmitters.

'Ihe safety listing has been Invised to indicate that the subject transmitters ,

must meet the requirements of Reg. Guide 1.97  ;

'Ibe safety listing will be reviewed to ensure that all Reg. Guide 1.97 relatnd instruments are properly identified.

The safety listing has recently became a part of the configuration management  ;

process. Procedures for this process will ensure that the safety listing is properly mintained in the future. '

PREVIOUS SIMIIAR EVDTIS As stated in IIR 89-35, there have been other events related to operation outside the design basis at Crystal River Unit 3. 'Ibese are listed in IIR 89-

33. None of these events involved inadoquacies in the safety listing.

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