IR 05000346/1987006

Safety Insp Rept 50-346/87-06 on 870223-26.No Violations Noted.Major Areas Inspected:Actions Set Forth in IE Bulletin 82-02 Re Degradation of Threaded Fasteners in RCPB

ML20212N734
Person / Time
Site:	Davis Besse
Issue date:	03/09/1987
From:	Danielson D, Schapker J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
Shared Package
ML20212N700	List: IR 05000346/1987006 ML20212N697
References
50-346-87-06, 50-346-87-6, IEB-82-02, IEB-82-2, NUDOCS 8703130136
Download: ML20212N734 (4)

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U.S.AELEARREGULATORYCOMMISSION

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REGION III

Report No. 50-346/87006(DRS)

Docket No. 50-346 License No. NPF-3s Licensee: Toledo Edison Company Edison Plaza, 300 Madison Avenue Toledo, OH - 43652 ,,

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Facility Nane: Davis-Besse Unit 1 ,

Inspection At: -Daivs-Besse Site, Oak Harbor, Ohio

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Inspection Conducted: February 23-26, 1987

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Inspector: J. f. Sc e Date!

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Approved By: . H. Danielson, Chief 87 Materials and Processes Section iia,te Inspection Summary Inspection on February _23-26,19_8_7_(R_eport r No_. 5_0-3_46/_87006(DRS)J

Areas Inspected: Routine announed safety inspection of actions set forth in

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-lE Bulletin No. 82-02 - Degradation of Threaded Fasteners in Reactor Coolant Pressure Boundary. T1 2515/71 (92703)

Results: No violations or deviations were identifie I'

PDR ADOCK 05000346 !-.

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DETAILS 1. Persons Contacted Toledo Edison Company n (TED)

• Lorren Ramsett, Quality Assurance Director

• George Bradley, Nuclear Specialist II, Licensing

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• John O'Neill, Lead Maintenance Engineer Rick Gradomski, Associate Nuclear Engineer Davis Stephenson, Licensing Principal Marty Beier, Vendor Quality Supervisor Stephen Apuricio, Systems Engineer John Singer, Senior Quality Control Inspector NRC

• Paul Byron, Senior Resident Inspector

• Denotes those present at the exit intervie p 2. Licensee Action on IE Bulle_ tins _

(Closed) IE Bulletin No. 82 02 (346/82-02-BB): TI 2515/71 - Inspection of the Licensee's Actions in Response to IE Bulletin No. 82-02 (Degradation of Threaded Fasteners in Reactor Coolant Pressure Boundary). The objective i of this inspection was to ensure that the actions set forth in IE Bulletin

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(IEB) No. 82-02 are met with regard to the establishment of naintenance procedures for threaded fasteners in components of the reactor coolant pressure boundary (RCPB), and that quality assurance measures are established to minimize susceptibility to stress corrosion cracking (SCC) environments

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from lubricants and sealants for threaded fasteners in RCPB component The NRC inspector selected five maintenance procedures, included here:

Pressurizer and Steam Generator marway covers, and Reactor Coolant pump and RCPB gate and check valves disassembly, repair and reassembly. Specific reference to IE Dulletin No. 82-02 was included in the procedures reviewed. Additional inspection and lubrication criteria was added to the procedures. The additional criteria included cleaning, visual d inspection, liquid penetrant / magnetic particle exaniination for surface

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cracks and discontinuities and the lubrication of RCPB closure studs using

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a nickel graphite lubrican The nickel-graphite lubrication is a change directly attributed to IEB.No. 82-02. Previously the licensee used a molybdenum-disulfide based lubricant. Molybdenum-disulfide lubricant use data indicated that a g significant increase of leakage and corrosicn occurred at those facilities employing this lubricant. (Reference: HUREG-1095 - Evaluation of Responses to IE Bulletin No. 82-02). The switch to a nickel-graphite based lubricant by the licensee, although not required by the bulletin, is ccnsidered a positive preventive maintenance action to preclude added

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deterioration of threaded fasteners and RCFB component n y

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The counitments to IE Bulletin No. 82-02 are italicized within' th procedures reviewed. The procedures also reference IEB No. 82-02 within-the purpose section of the procedures. These references within the procedures assures revisions to the procedures will not remove these requirements without technical justificatio The.-lubrication procedures were approved by the equipment manufacturer and torque valves and/or bolt tensioning was evaluated, reviewed and -

approved for use with nickel-graphite _ lubricatio The NRC inspector selected a randcm sample of procurement documents for recent purchases of lubricants (Fel-Pro N5000) and sealants (Furmanite).

Review of these documents concluded that the licensee's procurerent program for consumables complies with the requirements-of IEB No. 82-0 The licensee's procurerent acceptance criteria-for consumables used in the primary system is:

Chlorides : 200 ppm *

Fluorides : 200 ppm *

Sulfur : 700 ppm *

• • Mercury : 2 ppm *

• • Lead _ : 100 ppm *

• • Copper- : 200 ppm *

• • Zinc : 200 ppm *

• • Cadium : 200 ppm *

• • Tin : 200 ppm *

• Maximum allowable concentration

• • Tctal of low melting point metals may not exceed 500 ppm combine The NRC inspector reviewed inspecticn data of RCPB threaded fasteners for the last two outages. Non-destructive examination (NDE) (visual, magnetic particle and ultrasonic examinaticns) disclosed no degradation of threaded fasteners. The licensee's programatic changes to comply with IEB No. 82-02 appears to have reduced the incident of degradation to threaded fasteners. The NRC inspector reviewed the following licensee and contractor's procedures in' performance of this inspection:

Procedure Revision Title ,

MP-1411.08 01 Velan bolted Check Valves Disassembly, Repair and Reassembly MP-1410.10 01 Velan 21/2" then 24" Forged Gate Valve Maintenance MP-1700.83 04 R. C. Pump Disassen.bly, Inspection, Repair and Reassembly MP-1401.16 03 Pressurizer Manway Cover Removal and Replacement NP-1401.38 03 OTSG Primary Panway Maintenance

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• ISI-350 17 Visual Examination of Welds and Surface Conditions

• ISI-270 14 Wet or Dry Methods of Magnetic Particle Examination of Welds, Studs, Bolts, and Pump Motor Flywheels

• ISI-104' 21 Ultrasonic Examination of Ligaments between Threaded Holes and of Studs and Bolts One Inch and Larger in Diameter

• Contractor's procedures No violations or deviations were identified during the course of the inspectio . Exit Interview The inspector met with site representatives (denoted in Persons Contacted Paragraph) at the conclusion of the inspection. The inspector summarized the scope and findings of this inspection noted in this report. The inspector also discussed the likely informational content of the-inspection report with regard to documents or processes revievied by the inspector during the inspection. The licensee did not identify any such dccuments/ processes as proprietar .

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