IR 05000346/1986033

Insp Rept 50-346/86-33 on 861209-10.No Violation or Deviation Noted.Major Area Inspected:Auxiliary Feedwater Pump Turbine Steam Supply Piping Testing

ML20212E687
Person / Time
Site:	Davis Besse
Issue date:	12/23/1986
From:	Danielson D, Yin I NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
Shared Package
ML20212E661	List: IR 05000346/1986033 ML20212E656
References
50-346-86-33, NUDOCS 8701050404
Download: ML20212E687 (3)

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U.S. NUCLEAR REGULATORY COMMISSION

REGION III

Report No. 50-346/86033(DRS)

Docket No. 50-346 License No. NPF-3 Licensee: Toledo Edison Company Edison Plaza 300 Madison Avenue Toledo, OH 43652 Facility Name: Davis-Besse Nuclear Power Station, Unit 1 Inspection At: Davis-Besse Site, Oak Harbor, Ohio Inspection Conducted: December 9-10, 1986

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Inspector: I. T. Yin '

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/ bl3 fh Date Approved By: D. H. Danielson, Chief / 2./2.3/W Materials and Processes Da'te Section Inspection Summary Inspection on December 9-10, 1986 (Report No. 50-346/86033(DRS))

Areas Inspected: Special, announced inspection of auxiliary feedwater pump turbine steam supply (AFPTSS) piping testing (92701).

Results: Of the area inspected, no items of violation or deviation were identifie PDR ADOCK 05000346 j O PDR

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DETAILS i

1. P_er_s_ons Contacted Toledo Edison Company _(TED)_

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• P. C. Hildebrandt, General Director, Nuclear Facilities Engineering Division

• T. B. Ridlon, Nuclear Technologist

• T. S. Swim, Civil / Structural Engineering Manager

• J. C. Sturdavant, Licensing Specialist

• R. F. Peters, Licensing Manager Bechtel Power Corporation S. Trickovic, Test Leader

• S. Piccolo, Test Manager U.S._ Nuc_ lear Regulatory Commission, Region III

• D. Kosloff, Resident Inspector

• Denotes those attending the management meeting at the site on December 10, 198 . Licensee Action on Previous Inspection _F_indingi

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(Closed)OpenItem(346/85035-01): TED committed to conduct confirmatory tests on the AFPTSS piping system following the completion of modifications to the system. The NRC inspector reviewed the following TED test and inspection procedures, and had no adverse comments:

TP 850.99, "AFW-MS Supply Line Vibration Test, FCR 85-143 and FCR 85-163," March 22, 198 IP-M-006, " Thermal Expansion and Dynamic Testing of Main Steam Supply to the Auxiliary Feedwater Pump Turbines," Revision 2,

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December 8,1986.

i The tests for Train No.1-2 turbine start and trip were conducted on December 8,1986, with the steam temperature measured at 530'F. The NRC inspector reviewed the instrument readings obtained from the six displacement transducers, and observed no movements due to system dynamic transients. This could be attributed to an upgrading of the AFPTSS operational procedures and the slow pneumatic valve opening time of 24 seconds. The NRC inspector perfonned walkdown inspection of the AFPTSS piping system including the crossover legs, and observed no hardware deformation or degradation. In a review of the TED hanger inspection records, one snubber showed a slight movement in a direction opposite to that predicted by design calculations, one spring hanger was seeing an operating load slightly in excess of the predicted design load, and one rigid restraint bracket was modified to allow for additional piping thermal movement. The above discrepancies were evaluated or i corrected by TED during the test <

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3. Exit Interview The NRC inspector met with licensee representative (denoted in Paragraph 1)

at the conclusion of the inspection. The inspector summarized the scope and findings of the inspection. The inspector also discussed the likely informational content of the inspection report with regard to documents reviewed by the inspector during the inspection. The licensee representatives aid not identify any such documents as proprietar ,

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