ML20042E989

Suppl 15 to Startup Test Rept. W/900430 Ltr

ML20042E989
Person / Time
Site:	River Bend
Issue date:	04/27/1990
From:	Odell W GULF STATES UTILITIES CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
RBG-32756, NUDOCS 9005070068
Download: ML20042E989 (4)

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.e GULF STATES UTILITIES COMPANY fWIR MND STAnDN POST OFTbCi SOk 270 bl FFtANCbSVRtl LOUl$1AhA 7017%

AREA CODE 604 M5 6M*4 $46 BCE) t April 30, 1990 RBG- 327 56 File Nos. G9.5, G9.25.1.5 U. S. Naclear Regulatory Cmmission Document Control Desk -

Washington, D.C. 20555 Gentlemen

. 1 River Bend Station - Unit 1'  !

b Docket No.>50-458 f Enclosed -is Supplement 15 to the Startup Test Report for River Bend Station - Unit 1. This report covers the period through April 27, 1990.

This inunnation is provided pursuant to Technical Specifications 6.9.1.2 and 6.9.1.3 and Regulatory Guides 1.16 and 1.68. : An additional report will. follow within three nonths pursuant - to- Technical Specification 6.9.1.3.

Sincerely, l-j

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. H. Cdell Manager-Oversight River Bend Nuclear Group Enclosure '

cc: U. S. Nuclear Regulatory Cmmission Region IV 611 Ryan Plaza Drive, Suite 1000  ;

Arlington, TX 76011

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NRC Resident Inspector P.O. Box 1051 St. Francisville, IA 70775 Mr. Walt A. Paulson I Project Manager, River Bend Station 1 Document Control Desk Washington, D.C. 20555 h j P005070068 900427

" ' 'I PDR ADOCK 05000458 \

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. GRE STMES UTIIJTIES NANY

. RIVER BEDO S MTIG M MIT 1 {

i STMTUP TEST REFORT'(SUPPI2MElff 15)-  :

.27 APRIL 1990

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n-STARTUPTESTREPORT(SUPPLEMENT 15)

1. The River Bend - Unit 1 Startup Test Program was concluded on  :

June 16, 1986. This supplemental report provides the current '

status of open test Exceptions from the January 27,- 1990 supplement of the Gulf States Utilities Company, River Bend Station - Unit 1. Startup Test Report. Since the January-27, 1990 report, six test-exceptions have been closed and three open test exceptions remain,. These three remaining _ test exceptions are scheduled to be closed by June 1990.

-2. A11~open test' exceptions are categorized as affecting level 2 criteria or lower. Any level I criteria failures- referenced in ' previous supplements were downgraded to level 2 criteria as a result of- appropriate engineering analysis and are considered level 2- criteria in this report, This is

- consistent with the treatment of-all test criteria referenced in the initial Startup Test Report. All open test exceptions were evaluated and approved by the on-site review committee.

for continued, safe,' full power _ operation of River Bend Station - Unit 1,.

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3. Currently, the test exceptions are assigned to the individual  !

system engineers to which the exceptions are most applicable, ;I It is believed that each engineer's knowledge of the system will aid in expediting the closure of the test exceptions.,

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ST-22 Pressure Regulator I

'IE-22: Status Opm The main turbine pressure regulator failed the level- 2 criteria for incremental regulation. Operation of the systs through actual plant < transients, including recirculation system flow control valve runbacks, single-loop operation, power changes at various rates and numerous startups and shutdowns since initial criticality, has- denonstrated -that this syste performs' I satisfactorily. Engineering is evaluating data collected ~ during plant power maneuvers to evaluate the closure of this test exception. This exception has been determined 'not~ to impact safe, full power operation.

ST-25C/D Main Steam Line Flow Instrtsaantation

'JE-3 : Status: Open

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'Ihe elbow tap flow versus delta P curves are not within +.5% of the design curves. Elbow tap flow data were taken during~ power ascension following the first refueling outage. Engineering is evaluating field data to determine required main steam line flow instrumentation calibration changes. General Electric (GE) has-evaluated this data and has agreed with GSU that this~ level 2  ;

test exception does not impact safe, full power operation. '

ST-30C Hecirculation Systen Performance  ;

'IE-3 : Status: Open The recirculation system flow control valve mismatch that existed was reduced frun 14% to 7% and the core and drive flow shortfalls l have been resolved. Evaluation 'is continuing to resolve the  ;

below design acceptance of the M ratio for the loop B problem. t Retest may be required to adequately disposition the M ratio problem due to the reduced flow control valve mismatch.D . A retest procedure has been drafted by on-site GE personnel. Evaluation of data obtained during plant power maneuvers continues. .This level 2 test exception does not impact safe, full. power operation.

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