ML20084S483

RO Re Notification by GE of Oversight in Reload 2 Licensing Submittal Leading to Possible Nonconservative Operation During Cycle 3.Work Request to Lower Rod Block Monitor Line to 10% at Full Flow Initiated

ML20084S483
Person / Time
Site:	Quad Cities
Issue date:	09/21/1976
From:	Kalivianakis N COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084S480	List: ML20084S476 ML20084S483
References
NJK-76-351, NUDOCS 8306170054
Download: ML20084S483 (2)

Text

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b h Edison O

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OdacCrics t car Power Sto'ca

(%(iQN,.dW'7 Cordova. I! boo:s G1242 PoM Omce Dot ?)G Telephone 3D9/054-2241 '

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J. Keppler, Regional' Director

, Office of Inspectfon; and. Enforcement 2'

Reglon !Il' U. S. Nucicar Regulatory Commission 799 Roosevelt Road Glen.Ellyn, 111tnois.60137 Referencet-quad-Cities Nuclear Power Station, Unit 17 Docket Ho-. 50-254, DPR-29 Appendir A,. Sections 3 2.C Il; 6.6.1LI ht Dear Mr. Keppler-The purpose of this letter is to provida you with notification of a Reportable Occurrence as required by Technical-Specification 6.6.B. T' i

within,24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the occurrence.

The General Electric Company has notified.Cournonwealth' Edicon's Rucicar Fuel Services department, who has in. turn. notified the station, of an-

' oversight in the Quad-Cities Unit One Reload Two Licensing Submittal j

iesding to possible non-conservative operation of the unit during cycle 3.

For a. Rod Block. Monitor (UDH) rod block line setpoint of IIO% at rated flow, the !! censing submittal shows the Rod Withdrawal Error (RVE).

to be the liraiting: Minlaum Critica1' Power-Ratio-(MCPR)' transient.. This.

was apparently overlocked when determining. the MCPRcoperating limits for

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i Cycie 3 In order to-be able to. apply-tI>e MCPit 1imits. specified in, the 1 Tcensing. submittal' and our current Technical Specifications, the. RBM-5 rod block setpoint at fut t ' flow.n;ust be lowered to 107%.

r We' have. Initlated n. work request to-Iower the RBM rod: block line to;1073 at full flow,. and have verified that a Technical Specification: change request has been initiated. This action..wi ll' eliminate-the RWE as ' a-IYmiting transient and'will place us conservatively withih.the analysis i

of the submittal.

Rod ' movement has been. procedurally < Ilmited so-as to; j

minimize the possibil'ity.of. an P.VE and! ensure: safe unit operation.

8306170054 761004 gDRADOCK-05000254 PDR ui.

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This. occurrence was discussed by telephone with Mr.

C'. Feierabendtof your office on September 21. 1976.

Further inforr.ution. will'ba provided.

by. Reportable Occurrence Report RO 50-254/76-31:which will be submitted.

within 14 days of the date of this occurrence.

Very truly yours, COMMONVEALTH. E0 5 SON: COMPANY' QUA06 CITIES NBCLEAR POWER. STATION:-

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J. Kaifvfanakis Station Superintendent NJK/GS/Ik cc:

G. A. Abrell

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