ML20012C414

LER 90-002-00:on 900117,steam Generator B Channel 3 Pressure Transmitter Failed Low & Declared Inoperable.On 900119, Discovered That Channel Returned to Svc W/O Completing Required Time Response Testing on transmitter.W/900314 Ltr

ML20012C414
Person / Time
Site:	Beaver Valley
Issue date:	03/14/1990
From:	Noonan T DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LER-90-002-01, LER-90-2-1, ND3MNO:2042, NUDOCS 9003210251
Download: ML20012C414 (4)

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Telephone (412) 393-6000 O Don E Sheppmgport. PA 16077 4 104 I

March 14, 1990 ND3MNO:2042 l

l Beaver Valley Power Station, Unit No. 2 Docket No. 50-412, License No. NPF-73 LER 90-002-00 United States Nuclear Regulatory Commission Document Control Desk Washington, DC '20555 Gentlemen: '

In accordance with Appendix A, Beaver Valley Technical Specifications, the following Licensee Event Report is submitted:

LER 90-002-00, 10 CFR 50.73.a.2.1.B, " Failure to Perform Time Response-Testing". '

Very truly yours, T f 7& '

T.'P. Noonan General Manager Nuclear Operations s1 Attachment l-

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cc:-Mr. William T. Russell Regional Administrator United States Nuclear Regulatory Commission Region 1 475 Allendale Road King of Prussia, PA 19406 C. A. Roteck, Ohio Edison f

Mr. Peter Tam, BVPS Licensing Project Manager United States Nuclear Regulatory Commission Washington, DC 20555 J. Beall, Nuclear Regulatory Commission, BVPS Senior Resident Inspector Dave Amerine Centerior Energy 6200 Oak Tree Blvd.

Independence, Ohio 44101 INPO Records Center Suite 1500 1100 Circle 75 Parkway Atlanta, GA 30339 G. E. Muckle, Factory Mutual Engineering, Pittsburgh Mr. J. N. Steinmetz, Operating Plant Projects Manager Mid Atlantic Area Westinghouse Electric Corporation Energy Systems Service Division Box 355 Pittsburgh, PA 15230 American Nuclear Insurers c/o Dottie Sherman, ANI Library The Exchange Suite 245 270 Farmington Avenue Farmington, CT 06032 Mr. Richard Janati Department of Environmental Resources P. O. Box 2063 16th Floor, Fulton Building Harrisburg, PA 17120 Director, Safety Evaluation & Control Virginia Electric & Power Co.

P.O. Box 26666 l One James River Plaza Richmond, VA 23261 l

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Sutve13svN Yt$ I!9 res remosete iJr*fCTfD SV0W3stOk DA TE) ko l l l AOSTR ACT ILmt to 7G speces s e , eaeresee'e'y 7,#reen seapre sosce typeerstwo maesi (161 On 1/17/90, the "B" Steam Generator Channel 3 Pressure Transmittor failed low and was declared inoperable. The transmitter was replaced and the channcl was returned to service on 1/19/90s During supervisory review of the completed work package, it was discovered that the enannel hhd been returned to service without completing the required time response testing on the new transmitter. The channel was immediately declared inoperable and out of service until the time response testina could be completed. This testing was performed and verified that the transmitter response was within the required specifications. The channel was declared operable and returned to service at this time. Review of the event determined that the post-maintenance testing program did not have a requirement for time response testing. The post-maintenance testincJ is being revised to require time response testing on required components. There were no safety implications due to this event. The time response testing verified that the channel was capable of performing its required function for the entire time when it was in service.

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Descrintion of Event On 1/17/90, steam pressure channel 3 for the "B" Steam Generator failed low. The channel was declared inoperable and its associated bistables tripped, as required by Technical Specification 3.3.2.1. As per the requirements, operatic.n could continue under these conditions until the channel's next tunctional test, which was due 1/24/90. Investigation determined that the channel had failed due to a fault in its associated steam pressurc transmitter (2 MSS-PT485). The transmitter was replaced and channel recalibrated. The channel was declared operable and returned to service on 1/19/90.

On 2/12/90, during supervisory review of the completed work package, it was discovered that time response testing had not been performed on the new pressure transmitter. Technical Specification 3.3.2.1 requires time response testing as a condition of operability. The channel was immediately declared inoperable and removed from service. Time response testing was initiated and completed on 2/13/90. The results of the test r.howed that the transmitter had an acceptable time response. It was determined that the channel was operable and capable of performing its design function. The channel was then returned to service.

Cause of EVADt The event occurred because of a failure to complete a Technical Specification required post-maintenance test (i.e. time response test). The station's post-maintenance testing program did not specifically identify the need for time response testing as a normal operability verification for transmitters. At the time the pressure transmitter was replaced, the involved supervisors did not identify the requirement to complete tima response testing.

l Corrective Actions The requirement to perform time response testing is being incorporated into the post-maintenance testing procedure and formal review process. All maintenance supervisory personnel will receive training on this revised procedure.

Previous Similar Events There has been one previous reportable event involving a micsed time response surveillance (Unit 1 LER 85-009). In this previous event, a scheduling error resulted in the Train "A" Reactor Trip Response Time Test not being performed within its required frequency. There has also been one previous event (Unit 2 LER 87-012) caused by inadequate post-maintenance testing. In LER 87-012, the Rod Control System was returned to service after regulation failure without post-maintenance testing. The fault recurred, resulting in a reactor trip.

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LICENSEE EVENT REPORT (LER) TEXT CONTINUATION AnRoveo ous Ro.3i oaiu LAPIRE$: $ '31/98 P ActLITY esAmt (Is 00 cast NUMBER 423 LER NUMSER ISI PAOS (3)

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.oeo wc om ma v <tn Safety Analysis There were no safety implications due to this event. Testing performed on 2/13/90 verified that the transmitter's response time was within the required specifications. This demonstrated that the associated channel was capable of performing its design function for the entire period when it was in service.

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